Auto merge with /home/aegl/GIT/linus

Documentation/dvb/README.dvb-usb

@@ -13,14 +13,17 @@ different way: With the help of a dvb-usb-framework.
 The framework provides generic functions (mostly kernel API calls), such as:
 
 - Transport Stream URB handling in conjunction with dvb-demux-feed-control
-  (bulk and isoc (TODO) are supported)
+  (bulk and isoc are supported)
 - registering the device for the DVB-API
 - registering an I2C-adapter if applicable
 - remote-control/input-device handling
 - firmware requesting and loading (currently just for the Cypress USB
-  controller)
+  controllers)
 - other functions/methods which can be shared by several drivers (such as
   functions for bulk-control-commands)
+- TODO: a I2C-chunker. It creates device-specific chunks of register-accesses
+  depending on length of a register and the number of values that can be
+  multi-written and multi-read.
 
 The source code of the particular DVB USB devices does just the communication
 with the device via the bus. The connection between the DVB-API-functionality
@@ -36,93 +39,18 @@ the dvb-usb-lib.
 TODO: dynamic enabling and disabling of the pid-filter in regard to number of
 feeds requested.
 
-Supported devices USB1.1
+Supported devices
 ========================
 
-Produced and reselled by Twinhan:
----------------------------------
-- TwinhanDTV USB-Ter DVB-T Device (VP7041)
-	http://www.twinhan.com/product_terrestrial_3.asp
+See the LinuxTV DVB Wiki at www.linuxtv.org for a complete list of
+cards/drivers/firmwares:
 
-- TwinhanDTV Magic Box (VP7041e)
-	http://www.twinhan.com/product_terrestrial_4.asp
-
-- HAMA DVB-T USB device
-	http://www.hama.de/portal/articleId*110620/action*2598
-
-- CTS Portable (Chinese Television System) (2)
-	http://www.2cts.tv/ctsportable/
-
-- Unknown USB DVB-T device with vendor ID Hyper-Paltek
-
-
-Produced and reselled by KWorld:
---------------------------------
-- KWorld V-Stream XPERT DTV DVB-T USB
-	http://www.kworld.com.tw/en/product/DVBT-USB/DVBT-USB.html
-
-- JetWay DTV DVB-T USB
-	http://www.jetway.com.tw/evisn/product/lcd-tv/DVT-USB/dtv-usb.htm
-
-- ADSTech Instant TV DVB-T USB
-	http://www.adstech.com/products/PTV-333/intro/PTV-333_intro.asp?pid=PTV-333
-
-
-Others:
--------
-- Ultima Electronic/Artec T1 USB TVBOX (AN2135, AN2235, AN2235 with Panasonic Tuner)
-	http://82.161.246.249/products-tvbox.html
-
-- Compro Videomate DVB-U2000 - DVB-T USB (2)
-	http://www.comprousa.com/products/vmu2000.htm
-
-- Grandtec USB DVB-T
-	http://www.grand.com.tw/
-
-- AVerMedia AverTV DVBT USB
-	http://www.avermedia.com/
-
-- DiBcom USB DVB-T reference device (non-public)
-
-
-Supported devices USB2.0-only
-=============================
-- Twinhan MagicBox II
-	http://www.twinhan.com/product_terrestrial_7.asp
-
-- TwinhanDTV Alpha
-	http://www.twinhan.com/product_terrestrial_8.asp
-
-- DigitalNow TinyUSB 2 DVB-t Receiver
-	http://www.digitalnow.com.au/DigitalNow%20tinyUSB2%20Specifications.html
-
-- Hanftek UMT-010
-	http://www.globalsources.com/si/6008819757082/ProductDetail/Digital-TV/product_id-100046529
-
-
-Supported devices USB2.0 and USB1.1
-=============================
-- Typhoon/Yakumo/HAMA/Yuan DVB-T mobile USB2.0
-	http://www.yakumo.de/produkte/index.php?pid=1&ag=DVB-T
-	http://www.yuan.com.tw/en/products/vdo_ub300.html
-	http://www.hama.de/portal/articleId*114663/action*2563
-	http://www.anubisline.com/english/articlec.asp?id=50502&catid=002
-
-- Artec T1 USB TVBOX (FX2) (2)
-
-- Hauppauge WinTV NOVA-T USB2
-	http://www.hauppauge.com/
-
-- KWorld/ADSTech Instant DVB-T USB2.0 (DiB3000M-B)
-
-- DiBcom USB2.0 DVB-T reference device (non-public)
-
-- AVerMedia AverTV A800 DVB-T USB2.0
-
-1) It is working almost - work-in-progress.
-2) No test reports received yet.
+http://www.linuxtv.org/wiki/index.php/DVB_USB
 
 0. History & News:
+  2005-06-30 - added support for WideView WT-220U (Thanks to Steve Chang)
+  2005-05-30 - added basic isochronous support to the dvb-usb-framework
+               added support for Conexant Hybrid reference design and Nebula DigiTV USB
   2005-04-17 - all dibusb devices ported to make use of the dvb-usb-framework
   2005-04-02 - re-enabled and improved remote control code.
   2005-03-31 - ported the Yakumo/Hama/Typhoon DVB-T USB2.0 device to dvb-usb.
@@ -137,7 +65,7 @@ Supported devices USB2.0 and USB1.1
   2005-01-31 - distorted streaming is gone for USB1.1 devices
   2005-01-13 - moved the mirrored pid_filter_table back to dvb-dibusb
              - first almost working version for HanfTek UMT-010
-             - found out, that Yakumo/HAMA/Typhoon are predessors of the HanfTek UMT-010
+             - found out, that Yakumo/HAMA/Typhoon are predecessors of the HanfTek UMT-010
   2005-01-10 - refactoring completed, now everything is very delightful
              - tuner quirks for some weird devices (Artec T1 AN2235 device has sometimes a
                Panasonic Tuner assembled). Tunerprobing implemented. Thanks a lot to Gunnar Wittich.
@@ -187,25 +115,13 @@ Supported devices USB2.0 and USB1.1
 1. How to use?
 1.1. Firmware
 
-Most of the USB drivers need to download a firmware to start working.
-
-for USB1.1 (AN2135) you need: dvb-usb-dibusb-5.0.0.11.fw
-for USB2.0 HanfTek: dvb-usb-umt-010-02.fw
-for USB2.0 DiBcom: dvb-usb-dibusb-6.0.0.8.fw
-for USB2.0 AVerMedia AverTV DVB-T USB2: dvb-usb-avertv-a800-01.fw
-for USB2.0 TwinhanDTV Alpha/MagicBox II: dvb-usb-vp7045-01.fw
-
-The files can be found on http://www.linuxtv.org/download/firmware/ .
+Most of the USB drivers need to download a firmware to the device before start
+working.
 
-We do not have the permission (yet) to publish the following firmware-files.
-You'll need to extract them from the windows drivers.
+Have a look at the Wikipage for the DVB-USB-drivers to find out, which firmware
+you need for your device:
 
-You should be able to use "get_dvb_firmware dvb-usb" to get the firmware:
-
-for USB1.1 (AN2235) (a few Artec T1 devices): dvb-usb-dibusb-an2235-01.fw
-for USB2.0 Hauppauge: dvb-usb-nova-t-usb2-01.fw
-for USB2.0 ADSTech/Kworld USB2.0: dvb-usb-adstech-usb2-01.fw
-for USB2.0 Yakumo/Typhoon/Hama: dvb-usb-dtt200u-01.fw
+http://www.linuxtv.org/wiki/index.php/DVB_USB
 
 1.2. Compiling
 
@@ -289,6 +205,9 @@ Patches, comments and suggestions are very very welcome.
    Gunnar Wittich and Joachim von Caron for their trust for providing
     root-shells on their machines to implement support for new devices.
 
+   Allan Third and Michael Hutchinson for their help to write the Nebula
+    digitv-driver.
+
    Glen Harris for bringing up, that there is a new dibusb-device and Jiun-Kuei
     Jung from AVerMedia who kindly provided a special firmware to get the device
     up and running in Linux.
@@ -296,7 +215,12 @@ Patches, comments and suggestions are very very welcome.
    Jennifer Chen, Jeff and Jack from Twinhan for kindly supporting by
 	writing the vp7045-driver.
 
-   Some guys on the linux-dvb mailing list for encouraging me
+   Steve Chang from WideView for providing information for new devices and
+	firmware files.
+
+   Michael Paxton for submitting remote control keymaps.
+
+   Some guys on the linux-dvb mailing list for encouraging me.
 
    Peter Schildmann >peter.schildmann-nospam-at-web.de< for his
     user-level firmware loader, which saves a lot of time
@@ -305,4 +229,4 @@ Patches, comments and suggestions are very very welcome.
    Ulf Hermenau for helping me out with traditional chinese.
 
    André Smoktun and Christian Frömmel for supporting me with
-    hardware and listening to my problems very patient.
+    hardware and listening to my problems very patiently.

Documentation/dvb/bt8xx.txt

-How to get the Nebula, PCTV and Twinhan DST cards working
-=========================================================
+How to get the Nebula Electronics DigiTV, Pinnacle PCTV Sat, Twinhan DST + clones working
+=========================================================================================
 
-This class of cards has a bt878a as the PCI interface, and
-require the bttv driver.
+1) General information
+======================
 
-Please pay close attention to the warning about the bttv module
-options below for the DST card.
+This class of cards has a bt878a chip as the PCI interface.
+The different card drivers require the bttv driver to provide the means
+to access the i2c bus and the gpio pins of the bt8xx chipset.
 
-1) General informations
-=======================
+2) Compilation rules for Kernel >= 2.6.12
+=========================================
 
-These drivers require the bttv driver to provide the means to access
-the i2c bus and the gpio pins of the bt8xx chipset.
+Enable the following options:
 
-Because of this, you need to enable
 "Device drivers" => "Multimedia devices"
-  => "Video For Linux" => "BT848 Video For Linux"
-
-Furthermore you need to enable
+ => "Video For Linux" => "BT848 Video For Linux"
 "Device drivers" => "Multimedia devices" => "Digital Video Broadcasting Devices"
-  => "DVB for Linux" "DVB Core Support" "Nebula/Pinnacle PCTV/TwinHan PCI Cards"
+ => "DVB for Linux" "DVB Core Support" "Nebula/Pinnacle PCTV/TwinHan PCI Cards"
 
-2) Loading Modules
-==================
+3) Loading Modules, described by two approaches
+===============================================
 
 In general you need to load the bttv driver, which will handle the gpio and
-i2c communication for us, plus the common dvb-bt8xx device driver.
-The frontends for Nebula (nxt6000), Pinnacle PCTV (cx24110) and
-TwinHan (dst) are loaded automatically by the dvb-bt8xx device driver.
+i2c communication for us, plus the common dvb-bt8xx device driver,
+which is called the backend.
+The frontends for Nebula DigiTV (nxt6000), Pinnacle PCTV Sat (cx24110),
+TwinHan DST + clones (dst and dst-ca) are loaded automatically by the backend.
+For further details about TwinHan DST + clones see /Documentation/dvb/ci.txt.
 
-3a) Nebula / Pinnacle PCTV
---------------------------
+3a) The manual approach
+-----------------------
 
-   $ modprobe bttv (normally bttv is being loaded automatically by kmod)
-   $ modprobe dvb-bt8xx (or just place dvb-bt8xx in /etc/modules for automatic loading)
+Loading modules:
+modprobe bttv
+modprobe dvb-bt8xx
 
+Unloading modules:
+modprobe -r dvb-bt8xx
+modprobe -r bttv
 
-3b) TwinHan and Clones
+3b) The automatic approach
 --------------------------
 
-   $ modprobe bttv i2c_hw=1 card=0x71
-   $ modprobe dvb-bt8xx
-   $ modprobe dst
-
-The value 0x71 will override the PCI type detection for dvb-bt8xx,
-which is necessary for TwinHan cards.
-
-If you're having an older card (blue color circuit) and card=0x71 locks
-your machine, try using 0x68, too. If that does not work, ask on the
-mailing list.
-
-The DST module takes a couple of useful parameters:
+If not already done by installation, place a line either in
+/etc/modules.conf or in /etc/modprobe.conf containing this text:
+alias char-major-81	bttv
 
-a. verbose takes values 0 to 5. These values control the verbosity level.
-b. debug takes values 0 and 1. You can either disable or enable debugging.
-c. dst_addons takes values 0 and 0x20:
-- A value of 0 means it is a FTA card.
-- A value of 0x20 means it has a Conditional Access slot.
+Then place a line in /etc/modules containing this text:
+dvb-bt8xx
 
-The autodetected values are determined by the "response string"
-of the card, which you can see in your logs:
-e.g.: dst_get_device_id: Recognize [DSTMCI]
+Reboot your system and have fun!
 
 --
 Authors: Richard Walker, Jamie Honan, Michael Hunold, Manu Abraham, Uwe Bugla

Documentation/feature-removal-schedule.txt

@@ -119,3 +119,19 @@ Why:	Match the other drivers' name for the same function, duplicate names
 	will be available until removal of old names.
 Who:	Grant Coady <gcoady@gmail.com>
 
+---------------------------
+
+What:	PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
+When:	November 2005
+Files:	drivers/pcmcia/: pcmcia_ioctl.c
+Why:	With the 16-bit PCMCIA subsystem now behaving (almost) like a
+	normal hotpluggable bus, and with it using the default kernel
+	infrastructure (hotplug, driver core, sysfs) keeping the PCMCIA
+	control ioctl needed by cardmgr and cardctl from pcmcia-cs is
+	unnecessary, and makes further cleanups and integration of the
+	PCMCIA subsystem into the Linux kernel device driver model more
+	difficult. The features provided by cardmgr and cardctl are either
+	handled by the kernel itself now or are available in the new
+	pcmciautils package available at
+	http://kernel.org/pub/linux/utils/kernel/pcmcia/
+Who:	Dominik Brodowski <linux@brodo.de>

Documentation/infiniband/user_verbs.txt

+USERSPACE VERBS ACCESS
+
+  The ib_uverbs module, built by enabling CONFIG_INFINIBAND_USER_VERBS,
+  enables direct userspace access to IB hardware via "verbs," as
+  described in chapter 11 of the InfiniBand Architecture Specification.
+
+  To use the verbs, the libibverbs library, available from
+  <http://openib.org/>, is required.  libibverbs contains a
+  device-independent API for using the ib_uverbs interface.
+  libibverbs also requires appropriate device-dependent kernel and
+  userspace driver for your InfiniBand hardware.  For example, to use
+  a Mellanox HCA, you will need the ib_mthca kernel module and the
+  libmthca userspace driver be installed.
+
+User-kernel communication
+
+  Userspace communicates with the kernel for slow path, resource
+  management operations via the /dev/infiniband/uverbsN character
+  devices.  Fast path operations are typically performed by writing
+  directly to hardware registers mmap()ed into userspace, with no
+  system call or context switch into the kernel.
+
+  Commands are sent to the kernel via write()s on these device files.
+  The ABI is defined in drivers/infiniband/include/ib_user_verbs.h.
+  The structs for commands that require a response from the kernel
+  contain a 64-bit field used to pass a pointer to an output buffer.
+  Status is returned to userspace as the return value of the write()
+  system call.
+
+Resource management
+
+  Since creation and destruction of all IB resources is done by
+  commands passed through a file descriptor, the kernel can keep track
+  of which resources are attached to a given userspace context.  The
+  ib_uverbs module maintains idr tables that are used to translate
+  between kernel pointers and opaque userspace handles, so that kernel
+  pointers are never exposed to userspace and userspace cannot trick
+  the kernel into following a bogus pointer.
+
+  This also allows the kernel to clean up when a process exits and
+  prevent one process from touching another process's resources.
+
+Memory pinning
+
+  Direct userspace I/O requires that memory regions that are potential
+  I/O targets be kept resident at the same physical address.  The
+  ib_uverbs module manages pinning and unpinning memory regions via
+  get_user_pages() and put_page() calls.  It also accounts for the
+  amount of memory pinned in the process's locked_vm, and checks that
+  unprivileged processes do not exceed their RLIMIT_MEMLOCK limit.
+
+  Pages that are pinned multiple times are counted each time they are
+  pinned, so the value of locked_vm may be an overestimate of the
+  number of pages pinned by a process.
+
+/dev files
+
+  To create the appropriate character device files automatically with
+  udev, a rule like
+
+    KERNEL="uverbs*", NAME="infiniband/%k"
+
+  can be used.  This will create device nodes named
+
+    /dev/infiniband/uverbs0
+
+  and so on.  Since the InfiniBand userspace verbs should be safe for
+  use by non-privileged processes, it may be useful to add an
+  appropriate MODE or GROUP to the udev rule.

Documentation/power/video.txt

@@ -117,6 +117,7 @@ IBM Thinkpad X40 Type 2371-7JG  s3_bios,s3_mode (4)
 Medion MD4220			??? (*)
 Samsung P35			vbetool needed (6)
 Sharp PC-AR10 (ATI rage)	none (1)
+Sony Vaio PCG-C1VRX/K		s3_bios (2)
 Sony Vaio PCG-F403		??? (*)
 Sony Vaio PCG-N505SN		??? (*)
 Sony Vaio vgn-s260		X or boot-radeon can init it (5)

MAINTAINERS

@@ -370,6 +370,10 @@ W:	http://www.thekelleys.org.uk/atmel
 W:	http://atmelwlandriver.sourceforge.net/
 S:	Maintained
 
+AUDIT SUBSYSTEM
+L:	linux-audit@redhat.com (subscribers-only)
+S:	Maintained
+
 AX.25 NETWORK LAYER
 P:	Ralf Baechle
 M:	ralf@linux-mips.org
@@ -1803,8 +1807,9 @@ M:	greg@kroah.com
 S:	Maintained
 
 PCMCIA SUBSYSTEM
+P:	Linux PCMCIA Team
 L:	http://lists.infradead.org/mailman/listinfo/linux-pcmcia
-S:	Unmaintained
+S:	Maintained
 
 PCNET32 NETWORK DRIVER
 P:	Thomas Bogendrfer

Makefile

@@ -792,6 +792,9 @@ export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 	$(Q)$(MAKE) $(build)=$(@D) $@
 %.o: %.c scripts FORCE
 	$(Q)$(MAKE) $(build)=$(@D) $@
+%.ko: scripts FORCE
+	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
+	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 %/:      scripts prepare FORCE
 	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 %.lst: %.c scripts FORCE
@@ -1033,6 +1036,7 @@ help:
 	@echo  '  modules_install - Install all modules'
 	@echo  '  dir/            - Build all files in dir and below'
 	@echo  '  dir/file.[ois]  - Build specified target only'
+	@echo  '  dir/file.ko     - Build module including final link'
 	@echo  '  rpm		  - Build a kernel as an RPM package'
 	@echo  '  tags/TAGS	  - Generate tags file for editors'
 	@echo  '  cscope	  - Generate cscope index'
@@ -1149,7 +1153,7 @@ endif # KBUILD_EXTMOD
 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
 
-ifeq ($(KBUILD_OUTPUT),)
+ifeq ($(src),$(obj))
 __srctree =
 else
 __srctree = $(srctree)/

arch/i386/kernel/cpu/common.c

@@ -435,6 +435,11 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
 	if (c == &boot_cpu_data)
 		sysenter_setup();
 	enable_sep_cpu();
+
+	if (c == &boot_cpu_data)
+		mtrr_bp_init();
+	else
+		mtrr_ap_init();
 }
 
 #ifdef CONFIG_X86_HT

arch/i386/kernel/cpu/intel.c

@@ -25,7 +25,7 @@ extern int trap_init_f00f_bug(void);
 /*
  * Alignment at which movsl is preferred for bulk memory copies.
  */
-struct movsl_mask movsl_mask;
+struct movsl_mask movsl_mask __read_mostly;
 #endif
 
 void __devinit early_intel_workaround(struct cpuinfo_x86 *c)

arch/i386/kernel/cpu/mtrr/generic.c

@@ -67,13 +67,6 @@ void __init get_mtrr_state(void)
 	mtrr_state.enabled = (lo & 0xc00) >> 10;
 }
 
-/*  Free resources associated with a struct mtrr_state  */
-void __init finalize_mtrr_state(void)
-{
-	kfree(mtrr_state.var_ranges);
-	mtrr_state.var_ranges = NULL;
-}
-
 /*  Some BIOS's are fucked and don't set all MTRRs the same!  */
 void __init mtrr_state_warn(void)
 {
@@ -334,6 +327,9 @@ static void generic_set_mtrr(unsigned int reg, unsigned long base,
 */
 {
 	unsigned long flags;
+	struct mtrr_var_range *vr;
+
+	vr = &mtrr_state.var_ranges[reg];
 
 	local_irq_save(flags);
 	prepare_set();
@@ -342,11 +338,15 @@ static void generic_set_mtrr(unsigned int reg, unsigned long base,
 		/* The invalid bit is kept in the mask, so we simply clear the
 		   relevant mask register to disable a range. */
 		mtrr_wrmsr(MTRRphysMask_MSR(reg), 0, 0);
+		memset(vr, 0, sizeof(struct mtrr_var_range));
 	} else {
-		mtrr_wrmsr(MTRRphysBase_MSR(reg), base << PAGE_SHIFT | type,
-		      (base & size_and_mask) >> (32 - PAGE_SHIFT));
-		mtrr_wrmsr(MTRRphysMask_MSR(reg), -size << PAGE_SHIFT | 0x800,
-		      (-size & size_and_mask) >> (32 - PAGE_SHIFT));
+		vr->base_lo = base << PAGE_SHIFT | type;
+		vr->base_hi = (base & size_and_mask) >> (32 - PAGE_SHIFT);
+		vr->mask_lo = -size << PAGE_SHIFT | 0x800;
+		vr->mask_hi = (-size & size_and_mask) >> (32 - PAGE_SHIFT);
+
+		mtrr_wrmsr(MTRRphysBase_MSR(reg), vr->base_lo, vr->base_hi);
+		mtrr_wrmsr(MTRRphysMask_MSR(reg), vr->mask_lo, vr->mask_hi);
 	}
 
 	post_set();

arch/i386/kernel/cpu/mtrr/main.c

@@ -332,6 +332,8 @@ int mtrr_add_page(unsigned long base, unsigned long size,
 
 	error = -EINVAL;
 
+	/* No CPU hotplug when we change MTRR entries */
+	lock_cpu_hotplug();
 	/*  Search for existing MTRR  */
 	down(&main_lock);
 	for (i = 0; i < num_var_ranges; ++i) {
@@ -372,6 +374,7 @@ int mtrr_add_page(unsigned long base, unsigned long size,
 	error = i;
  out:
 	up(&main_lock);
+	unlock_cpu_hotplug();
 	return error;
 }
 
@@ -461,6 +464,8 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
 		return -ENXIO;
 
 	max = num_var_ranges;
+	/* No CPU hotplug when we change MTRR entries */
+	lock_cpu_hotplug();
 	down(&main_lock);
 	if (reg < 0) {
 		/*  Search for existing MTRR  */
@@ -501,6 +506,7 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
 	error = reg;
  out:
 	up(&main_lock);
+	unlock_cpu_hotplug();
 	return error;
 }
 /**
@@ -544,21 +550,9 @@ static void __init init_ifs(void)
 	centaur_init_mtrr();
 }
 
-static void __init init_other_cpus(void)
-{
-	if (use_intel())
-		get_mtrr_state();
-
-	/* bring up the other processors */
-	set_mtrr(~0U,0,0,0);
-
-	if (use_intel()) {
-		finalize_mtrr_state();
-		mtrr_state_warn();
-	}
-}
-
-
+/* The suspend/resume methods are only for CPU without MTRR. CPU using generic
+ * MTRR driver doesn't require this
+ */
 struct mtrr_value {
 	mtrr_type	ltype;
 	unsigned long	lbase;
@@ -611,13 +605,13 @@ static struct sysdev_driver mtrr_sysdev_driver = {
 
 
 /**
- * mtrr_init - initialize mtrrs on the boot CPU
+ * mtrr_bp_init - initialize mtrrs on the boot CPU
  *
  * This needs to be called early; before any of the other CPUs are 
  * initialized (i.e. before smp_init()).
  * 
  */
-static int __init mtrr_init(void)
+void __init mtrr_bp_init(void)
 {
 	init_ifs();
 
@@ -674,12 +668,48 @@ static int __init mtrr_init(void)
 	if (mtrr_if) {
 		set_num_var_ranges();
 		init_table();
-		init_other_cpus();
-
-		return sysdev_driver_register(&cpu_sysdev_class,
-					      &mtrr_sysdev_driver);
+		if (use_intel())
+			get_mtrr_state();
 	}
-	return -ENXIO;
 }
 
-subsys_initcall(mtrr_init);
+void mtrr_ap_init(void)
+{
+	unsigned long flags;
+
+	if (!mtrr_if || !use_intel())
+		return;
+	/*
+	 * Ideally we should hold main_lock here to avoid mtrr entries changed,
+	 * but this routine will be called in cpu boot time, holding the lock
+	 * breaks it. This routine is called in two cases: 1.very earily time
+	 * of software resume, when there absolutely isn't mtrr entry changes;
+	 * 2.cpu hotadd time. We let mtrr_add/del_page hold cpuhotplug lock to
+	 * prevent mtrr entry changes
+	 */
+	local_irq_save(flags);
+
+	mtrr_if->set_all();
+
+	local_irq_restore(flags);
+}
+
+static int __init mtrr_init_finialize(void)
+{
+	if (!mtrr_if)
+		return 0;
+	if (use_intel())
+		mtrr_state_warn();
+	else {
+		/* The CPUs haven't MTRR and seemes not support SMP. They have
+		 * specific drivers, we use a tricky method to support
+		 * suspend/resume for them.
+		 * TBD: is there any system with such CPU which supports
+		 * suspend/resume?  if no, we should remove the code.
+		 */
+		sysdev_driver_register(&cpu_sysdev_class,
+			&mtrr_sysdev_driver);
+	}
+	return 0;
+}
+subsys_initcall(mtrr_init_finialize);

arch/i386/kernel/cpu/mtrr/mtrr.h

@@ -91,7 +91,6 @@ extern struct mtrr_ops * mtrr_if;
 
 extern unsigned int num_var_ranges;
 
-void finalize_mtrr_state(void);
 void mtrr_state_warn(void);
 char *mtrr_attrib_to_str(int x);
 void mtrr_wrmsr(unsigned, unsigned, unsigned);

arch/i386/kernel/smpboot.c

@@ -68,21 +68,21 @@ EXPORT_SYMBOL(smp_num_siblings);
 #endif
 
 /* Package ID of each logical CPU */
-int phys_proc_id[NR_CPUS] = {[0 ... NR_CPUS-1] = BAD_APICID};
+int phys_proc_id[NR_CPUS] __read_mostly = {[0 ... NR_CPUS-1] = BAD_APICID};
 EXPORT_SYMBOL(phys_proc_id);
 
 /* Core ID of each logical CPU */
-int cpu_core_id[NR_CPUS] = {[0 ... NR_CPUS-1] = BAD_APICID};
+int cpu_core_id[NR_CPUS] __read_mostly = {[0 ... NR_CPUS-1] = BAD_APICID};
 EXPORT_SYMBOL(cpu_core_id);
 
-cpumask_t cpu_sibling_map[NR_CPUS];
+cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(cpu_sibling_map);
 
-cpumask_t cpu_core_map[NR_CPUS];
+cpumask_t cpu_core_map[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(cpu_core_map);
 
 /* bitmap of online cpus */
-cpumask_t cpu_online_map;
+cpumask_t cpu_online_map __read_mostly;
 EXPORT_SYMBOL(cpu_online_map);
 
 cpumask_t cpu_callin_map;
@@ -100,7 +100,7 @@ static int __devinitdata tsc_sync_disabled;
 struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
 EXPORT_SYMBOL(cpu_data);
 
-u8 x86_cpu_to_apicid[NR_CPUS] =
+u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly =
 			{ [0 ... NR_CPUS-1] = 0xff };
 EXPORT_SYMBOL(x86_cpu_to_apicid);
 
@@ -550,10 +550,10 @@ extern struct {
 #ifdef CONFIG_NUMA
 
 /* which logical CPUs are on which nodes */
-cpumask_t node_2_cpu_mask[MAX_NUMNODES] =
+cpumask_t node_2_cpu_mask[MAX_NUMNODES] __read_mostly =
 				{ [0 ... MAX_NUMNODES-1] = CPU_MASK_NONE };
 /* which node each logical CPU is on */
-int cpu_2_node[NR_CPUS] = { [0 ... NR_CPUS-1] = 0 };
+int cpu_2_node[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = 0 };
 EXPORT_SYMBOL(cpu_2_node);
 
 /* set up a mapping between cpu and node. */
@@ -581,7 +581,7 @@ static inline void unmap_cpu_to_node(int cpu)
 
 #endif /* CONFIG_NUMA */
 
-u8 cpu_2_logical_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+u8 cpu_2_logical_apicid[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
 
 static void map_cpu_to_logical_apicid(void)
 {

arch/i386/kernel/time.c

@@ -91,7 +91,7 @@ EXPORT_SYMBOL(rtc_lock);
 DEFINE_SPINLOCK(i8253_lock);
 EXPORT_SYMBOL(i8253_lock);
 
-struct timer_opts *cur_timer = &timer_none;
+struct timer_opts *cur_timer __read_mostly = &timer_none;
 
 /*
  * This is a special lock that is owned by the CPU and holds the index

arch/i386/kernel/timers/timer_hpet.c

@@ -18,7 +18,7 @@
 #include "mach_timer.h"
 #include <asm/hpet.h>
 
-static unsigned long hpet_usec_quotient;	/* convert hpet clks to usec */
+static unsigned long __read_mostly hpet_usec_quotient;	/* convert hpet clks to usec */
 static unsigned long tsc_hpet_quotient;		/* convert tsc to hpet clks */
 static unsigned long hpet_last; 	/* hpet counter value at last tick*/
 static unsigned long last_tsc_low;	/* lsb 32 bits of Time Stamp Counter */
@@ -180,7 +180,7 @@ static int __init init_hpet(char* override)
 /************************************************************/
 
 /* tsc timer_opts struct */
-static struct timer_opts timer_hpet = {
+static struct timer_opts timer_hpet __read_mostly = {
 	.name = 		"hpet",
 	.mark_offset =		mark_offset_hpet,
 	.get_offset =		get_offset_hpet,

arch/i386/kernel/vmlinux.lds.S

@@ -57,6 +57,9 @@ SECTIONS
 	*(.data.cacheline_aligned)
   }
 
+  /* rarely changed data like cpu maps */
+  . = ALIGN(32);
+  .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) { *(.data.read_mostly) }
   _edata = .;			/* End of data section */
 
   . = ALIGN(THREAD_SIZE);	/* init_task */

arch/i386/mm/ioremap.c

@@ -228,7 +228,8 @@ EXPORT_SYMBOL(ioremap_nocache);
 void iounmap(volatile void __iomem *addr)
 {
 	struct vm_struct *p;
-	if ((void __force *) addr <= high_memory) 
+
+	if ((void __force *)addr <= high_memory)
 		return;
 
 	/*
@@ -241,9 +242,10 @@ void iounmap(volatile void __iomem *addr)
 		return;
 
 	write_lock(&vmlist_lock);
-	p = __remove_vm_area((void *) (PAGE_MASK & (unsigned long __force) addr));
+	p = __remove_vm_area((void *)(PAGE_MASK & (unsigned long __force)addr));
 	if (!p) { 
 		printk(KERN_WARNING "iounmap: bad address %p\n", addr);
+		dump_stack();
 		goto out_unlock;
 	}
 

arch/i386/power/cpu.c

@@ -137,6 +137,7 @@ void __restore_processor_state(struct saved_context *ctxt)
 
 	fix_processor_context();
 	do_fpu_end();
+	mtrr_ap_init();
 }
 
 void restore_processor_state(void)

arch/m32r/kernel/setup_m32700ut.c

@@ -3,8 +3,8 @@
  *
  *  Setup routines for Renesas M32700UT Board
  *
- *  Copyright (c) 2002 	Hiroyuki Kondo, Hirokazu Takata,
- *                      Hitoshi Yamamoto, Takeo Takahashi
+ *  Copyright (c) 2002-2005  Hiroyuki Kondo, Hirokazu Takata,
+ *                           Hitoshi Yamamoto, Takeo Takahashi
  *
  *  This file is subject to the terms and conditions of the GNU General
  *  Public License.  See the file "COPYING" in the main directory of this
@@ -435,7 +435,7 @@ void __init init_IRQ(void)
 	icu_data[M32R_IRQ_INT2].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD01;
 	enable_m32700ut_irq(M32R_IRQ_INT2);
 
-//#if defined(CONFIG_VIDEO_M32R_AR)
+#if defined(CONFIG_VIDEO_M32R_AR)
 	/*
 	 * INT3# is used for AR
 	 */
@@ -445,9 +445,11 @@ void __init init_IRQ(void)
 	irq_desc[M32R_IRQ_INT3].depth = 1;
 	icu_data[M32R_IRQ_INT3].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD10;
 	disable_m32700ut_irq(M32R_IRQ_INT3);
-//#endif	/* CONFIG_VIDEO_M32R_AR */
+#endif	/* CONFIG_VIDEO_M32R_AR */
 }
 
+#if defined(CONFIG_SMC91X)
+
 #define LAN_IOSTART     0x300
 #define LAN_IOEND       0x320
 static struct resource smc91x_resources[] = {
@@ -469,10 +471,55 @@ static struct platform_device smc91x_device = {
 	.num_resources  = ARRAY_SIZE(smc91x_resources),
 	.resource       = smc91x_resources,
 };
+#endif
+
+#if defined(CONFIG_FB_S1D13XXX)
+
+#include <video/s1d13xxxfb.h>
+#include <asm/s1d13806.h>
+
+static struct s1d13xxxfb_pdata s1d13xxxfb_data = {
+	.initregs		= s1d13xxxfb_initregs,
+	.initregssize		= ARRAY_SIZE(s1d13xxxfb_initregs),
+	.platform_init_video	= NULL,
+#ifdef CONFIG_PM
+	.platform_suspend_video	= NULL,
+	.platform_resume_video	= NULL,
+#endif
+};
+
+static struct resource s1d13xxxfb_resources[] = {
+	[0] = {
+		.start  = 0x10600000UL,
+		.end    = 0x1073FFFFUL,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = 0x10400000UL,
+		.end    = 0x104001FFUL,
+		.flags  = IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device s1d13xxxfb_device = {
+	.name		= S1D_DEVICENAME,
+	.id		= 0,
+	.dev            = {
+		.platform_data  = &s1d13xxxfb_data,
+	},
+	.num_resources  = ARRAY_SIZE(s1d13xxxfb_resources),
+	.resource       = s1d13xxxfb_resources,
+};
+#endif
 
 static int __init platform_init(void)
 {
+#if defined(CONFIG_SMC91X)
 	platform_device_register(&smc91x_device);
+#endif
+#if defined(CONFIG_FB_S1D13XXX)
+	platform_device_register(&s1d13xxxfb_device);
+#endif
 	return 0;
 }
 arch_initcall(platform_init);

arch/m32r/kernel/setup_mappi.c

@@ -3,14 +3,15 @@
  *
  *  Setup routines for Renesas MAPPI Board
  *
- *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata,
- *                            Hitoshi Yamamoto
+ *  Copyright (c) 2001-2005  Hiroyuki Kondo, Hirokazu Takata,
+ *                           Hitoshi Yamamoto
  */
 
 #include <linux/config.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/device.h>
 
 #include <asm/system.h>
 #include <asm/m32r.h>
@@ -158,3 +159,49 @@ void __init init_IRQ(void)
 	disable_mappi_irq(M32R_IRQ_INT2);
 #endif /* CONFIG_M32RPCC */
 }
+
+#if defined(CONFIG_FB_S1D13XXX)
+
+#include <video/s1d13xxxfb.h>
+#include <asm/s1d13806.h>
+
+static struct s1d13xxxfb_pdata s1d13xxxfb_data = {
+	.initregs		= s1d13xxxfb_initregs,
+	.initregssize		= ARRAY_SIZE(s1d13xxxfb_initregs),
+	.platform_init_video	= NULL,
+#ifdef CONFIG_PM
+	.platform_suspend_video	= NULL,
+	.platform_resume_video	= NULL,
+#endif
+};
+
+static struct resource s1d13xxxfb_resources[] = {
+	[0] = {
+		.start  = 0x10200000UL,
+		.end    = 0x1033FFFFUL,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = 0x10000000UL,
+		.end    = 0x100001FFUL,
+		.flags  = IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device s1d13xxxfb_device = {
+	.name		= S1D_DEVICENAME,
+	.id		= 0,
+	.dev            = {
+		.platform_data  = &s1d13xxxfb_data,
+	},
+	.num_resources  = ARRAY_SIZE(s1d13xxxfb_resources),
+	.resource       = s1d13xxxfb_resources,
+};
+
+static int __init platform_init(void)
+{
+	platform_device_register(&s1d13xxxfb_device);
+	return 0;
+}
+arch_initcall(platform_init);
+#endif

arch/m32r/kernel/setup_mappi2.c

@@ -3,8 +3,8 @@
  *
  *  Setup routines for Renesas MAPPI-II(M3A-ZA36) Board
  *
- *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata,
- *                            Hitoshi Yamamoto, Mamoru Sakugawa
+ *  Copyright (c) 2001-2005  Hiroyuki Kondo, Hirokazu Takata,
+ *                           Hitoshi Yamamoto, Mamoru Sakugawa
  */
 
 #include <linux/config.h>

arch/m32r/kernel/setup_mappi3.c

@@ -3,8 +3,8 @@
  *
  *  Setup routines for Renesas MAPPI-III(M3A-2170) Board
  *
- *  Copyright (c) 2001-2005   Hiroyuki Kondo, Hirokazu Takata,
- *                            Hitoshi Yamamoto, Mamoru Sakugawa
+ *  Copyright (c) 2001-2005  Hiroyuki Kondo, Hirokazu Takata,
+ *                           Hitoshi Yamamoto, Mamoru Sakugawa
  */
 
 #include <linux/config.h>
@@ -178,6 +178,8 @@ void __init init_IRQ(void)
 #endif /* CONFIG_M32R_CFC */
 }
 
+#if defined(CONFIG_SMC91X)
+
 #define LAN_IOSTART     0x300
 #define LAN_IOEND       0x320
 static struct resource smc91x_resources[] = {
@@ -200,9 +202,55 @@ static struct platform_device smc91x_device = {
 	.resource       = smc91x_resources,
 };
 
+#endif
+
+#if defined(CONFIG_FB_S1D13XXX)
+
+#include <video/s1d13xxxfb.h>
+#include <asm/s1d13806.h>
+
+static struct s1d13xxxfb_pdata s1d13xxxfb_data = {
+	.initregs		= s1d13xxxfb_initregs,
+	.initregssize		= ARRAY_SIZE(s1d13xxxfb_initregs),
+	.platform_init_video	= NULL,
+#ifdef CONFIG_PM
+	.platform_suspend_video	= NULL,
+	.platform_resume_video	= NULL,
+#endif
+};
+
+static struct resource s1d13xxxfb_resources[] = {
+	[0] = {
+		.start  = 0x1d600000UL,
+		.end    = 0x1d73FFFFUL,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = 0x1d400000UL,
+		.end    = 0x1d4001FFUL,
+		.flags  = IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device s1d13xxxfb_device = {
+	.name		= S1D_DEVICENAME,
+	.id		= 0,
+	.dev            = {
+		.platform_data  = &s1d13xxxfb_data,
+	},
+	.num_resources  = ARRAY_SIZE(s1d13xxxfb_resources),
+	.resource       = s1d13xxxfb_resources,
+};
+#endif
+
 static int __init platform_init(void)
 {
+#if defined(CONFIG_SMC91X)
 	platform_device_register(&smc91x_device);
+#endif
+#if defined(CONFIG_FB_S1D13XXX)
+	platform_device_register(&s1d13xxxfb_device);
+#endif
 	return 0;
 }
 arch_initcall(platform_init);

arch/m32r/kernel/setup_oaks32r.c

@@ -3,8 +3,8 @@
  *
  *  Setup routines for OAKS32R Board
  *
- *  Copyright (c) 2002-2004   Hiroyuki Kondo, Hirokazu Takata,
- *                            Hitoshi Yamamoto, Mamoru Sakugawa
+ *  Copyright (c) 2002-2005  Hiroyuki Kondo, Hirokazu Takata,
+ *                           Hitoshi Yamamoto, Mamoru Sakugawa
  */
 
 #include <linux/config.h>
@@ -139,5 +139,4 @@ void __init init_IRQ(void)
 	icu_data[M32R_IRQ_SIO1_S].icucr = 0;
 	disable_oaks32r_irq(M32R_IRQ_SIO1_S);
 #endif /* CONFIG_SERIAL_M32R_SIO */
-
 }

arch/m32r/kernel/setup_opsput.c

@@ -3,7 +3,7 @@
  *
  *  Setup routines for Renesas OPSPUT Board
  *
- *  Copyright (c) 2002-2004
+ *  Copyright (c) 2002-2005
  * 	Hiroyuki Kondo, Hirokazu Takata,
  *      Hitoshi Yamamoto, Takeo Takahashi, Mamoru Sakugawa
  *
@@ -439,7 +439,7 @@ void __init init_IRQ(void)
 	icu_data[M32R_IRQ_INT2].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD01;
 	enable_opsput_irq(M32R_IRQ_INT2);
 
-//#if defined(CONFIG_VIDEO_M32R_AR)
+#if defined(CONFIG_VIDEO_M32R_AR)
 	/*
 	 * INT3# is used for AR
 	 */
@@ -449,9 +449,11 @@ void __init init_IRQ(void)
 	irq_desc[M32R_IRQ_INT3].depth = 1;
 	icu_data[M32R_IRQ_INT3].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD10;
 	disable_opsput_irq(M32R_IRQ_INT3);
-//#endif	/* CONFIG_VIDEO_M32R_AR */
+#endif /* CONFIG_VIDEO_M32R_AR */
 }
 
+#if defined(CONFIG_SMC91X)
+
 #define LAN_IOSTART     0x300
 #define LAN_IOEND       0x320
 static struct resource smc91x_resources[] = {
@@ -473,10 +475,55 @@ static struct platform_device smc91x_device = {
 	.num_resources  = ARRAY_SIZE(smc91x_resources),
 	.resource       = smc91x_resources,
 };
+#endif
+
+#if defined(CONFIG_FB_S1D13XXX)
+
+#include <video/s1d13xxxfb.h>
+#include <asm/s1d13806.h>
+
+static struct s1d13xxxfb_pdata s1d13xxxfb_data = {
+	.initregs		= s1d13xxxfb_initregs,
+	.initregssize		= ARRAY_SIZE(s1d13xxxfb_initregs),
+	.platform_init_video	= NULL,
+#ifdef CONFIG_PM
+	.platform_suspend_video	= NULL,
+	.platform_resume_video	= NULL,
+#endif
+};
+
+static struct resource s1d13xxxfb_resources[] = {
+	[0] = {
+		.start  = 0x10600000UL,
+		.end    = 0x1073FFFFUL,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = 0x10400000UL,
+		.end    = 0x104001FFUL,
+		.flags  = IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device s1d13xxxfb_device = {
+	.name		= S1D_DEVICENAME,
+	.id		= 0,
+	.dev            = {
+		.platform_data  = &s1d13xxxfb_data,
+	},
+	.num_resources  = ARRAY_SIZE(s1d13xxxfb_resources),
+	.resource       = s1d13xxxfb_resources,
+};
+#endif
 
 static int __init platform_init(void)
 {
+#if defined(CONFIG_SMC91X)
 	platform_device_register(&smc91x_device);
+#endif
+#if defined(CONFIG_FB_S1D13XXX)
+	platform_device_register(&s1d13xxxfb_device);
+#endif
 	return 0;
 }
 arch_initcall(platform_init);

arch/ppc/platforms/pmac_cpufreq.c

@@ -452,7 +452,7 @@ static u32 __pmac read_gpio(struct device_node *np)
 	return offset;
 }
 
-static int __pmac pmac_cpufreq_suspend(struct cpufreq_policy *policy, u32 state)
+static int __pmac pmac_cpufreq_suspend(struct cpufreq_policy *policy, pm_message_t pmsg)
 {
 	/* Ok, this could be made a bit smarter, but let's be robust for now. We
 	 * always force a speed change to high speed before sleep, to make sure

arch/ppc64/kernel/head.S

@@ -308,6 +308,7 @@ exception_marker:
 label##_pSeries:					\
 	HMT_MEDIUM;					\
 	mtspr	SPRG1,r13;		/* save r13 */	\
+	RUNLATCH_ON(r13);				\
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
 
 #define STD_EXCEPTION_ISERIES(n, label, area)		\
@@ -315,6 +316,7 @@ label##_pSeries:					\
 label##_iSeries:					\
 	HMT_MEDIUM;					\
 	mtspr	SPRG1,r13;		/* save r13 */	\
+	RUNLATCH_ON(r13);				\
 	EXCEPTION_PROLOG_ISERIES_1(area);		\
 	EXCEPTION_PROLOG_ISERIES_2;			\
 	b	label##_common
@@ -324,6 +326,7 @@ label##_iSeries:					\
 label##_iSeries:							\
 	HMT_MEDIUM;							\
 	mtspr	SPRG1,r13;		/* save r13 */			\
+	RUNLATCH_ON(r13);						\
 	EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN);				\
 	lbz	r10,PACAPROCENABLED(r13);				\
 	cmpwi	0,r10,0;						\
@@ -393,6 +396,7 @@ __start_interrupts:
 _machine_check_pSeries:
 	HMT_MEDIUM
 	mtspr	SPRG1,r13		/* save r13 */
+	RUNLATCH_ON(r13)
 	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
 	. = 0x300
@@ -419,6 +423,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 data_access_slb_pSeries:
 	HMT_MEDIUM
 	mtspr	SPRG1,r13
+	RUNLATCH_ON(r13)
 	mfspr	r13,SPRG3		/* get paca address into r13 */
 	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */
 	std	r10,PACA_EXSLB+EX_R10(r13)
@@ -439,6 +444,7 @@ data_access_slb_pSeries:
 instruction_access_slb_pSeries:
 	HMT_MEDIUM
 	mtspr	SPRG1,r13
+	RUNLATCH_ON(r13)
 	mfspr	r13,SPRG3		/* get paca address into r13 */
 	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */
 	std	r10,PACA_EXSLB+EX_R10(r13)
@@ -464,6 +470,7 @@ instruction_access_slb_pSeries:
 	.globl	system_call_pSeries
 system_call_pSeries:
 	HMT_MEDIUM
+	RUNLATCH_ON(r9)
 	mr	r9,r13
 	mfmsr	r10
 	mfspr	r13,SPRG3
@@ -707,11 +714,13 @@ fwnmi_data_area:
 system_reset_fwnmi:
 	HMT_MEDIUM
 	mtspr	SPRG1,r13		/* save r13 */
+	RUNLATCH_ON(r13)
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common)
 	.globl machine_check_fwnmi
 machine_check_fwnmi:
 	HMT_MEDIUM
 	mtspr	SPRG1,r13		/* save r13 */
+	RUNLATCH_ON(r13)
 	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
 	/*
@@ -848,6 +857,7 @@ unrecov_fer:
 	.align	7
 	.globl data_access_common
 data_access_common:
+	RUNLATCH_ON(r10)		/* It wont fit in the 0x300 handler */
 	mfspr	r10,DAR
 	std	r10,PACA_EXGEN+EX_DAR(r13)
 	mfspr	r10,DSISR

arch/ppc64/kernel/hvconsole.c

@@ -27,7 +27,6 @@
 #include <linux/module.h>
 #include <asm/hvcall.h>
 #include <asm/hvconsole.h>
-#include <asm/prom.h>
 
 /**
  * hvc_get_chars - retrieve characters from firmware for denoted vterm adatper
@@ -42,29 +41,14 @@ int hvc_get_chars(uint32_t vtermno, char *buf, int count)
 	unsigned long got;
 
 	if (plpar_hcall(H_GET_TERM_CHAR, vtermno, 0, 0, 0, &got,
-		(unsigned long *)buf, (unsigned long *)buf+1) == H_Success) {
-		/*
-		 * Work around a HV bug where it gives us a null
-		 * after every \r.  -- paulus
-		 */
-		if (got > 0) {
-			int i;
-			for (i = 1; i < got; ++i) {
-				if (buf[i] == 0 && buf[i-1] == '\r') {
-					--got;
-					if (i < got)
-						memmove(&buf[i], &buf[i+1],
-							got - i);
-				}
-			}
-		}
+		(unsigned long *)buf, (unsigned long *)buf+1) == H_Success)
 		return got;
-	}
 	return 0;
 }
 
 EXPORT_SYMBOL(hvc_get_chars);
 
+
 /**
  * hvc_put_chars: send characters to firmware for denoted vterm adapter
  * @vtermno: The vtermno or unit_address of the adapter from which the data
@@ -88,34 +72,3 @@ int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
 }
 
 EXPORT_SYMBOL(hvc_put_chars);
-
-/*
- * We hope/assume that the first vty found corresponds to the first console
- * device.
- */
-int hvc_find_vtys(void)
-{
-	struct device_node *vty;
-	int num_found = 0;
-
-	for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
-			vty = of_find_node_by_name(vty, "vty")) {
-		uint32_t *vtermno;
-
-		/* We have statically defined space for only a certain number of
-		 * console adapters. */
-		if (num_found >= MAX_NR_HVC_CONSOLES)
-			break;
-
-		vtermno = (uint32_t *)get_property(vty, "reg", NULL);
-		if (!vtermno)
-			continue;
-
-		if (device_is_compatible(vty, "hvterm1")) {
-			hvc_instantiate(*vtermno, num_found);
-			++num_found;
-		}
-	}
-
-	return num_found;
-}

arch/ppc64/kernel/iSeries_setup.c

@@ -834,6 +834,92 @@ static int __init iSeries_src_init(void)
 
 late_initcall(iSeries_src_init);
 
+static inline void process_iSeries_events(void)
+{
+	asm volatile ("li 0,0x5555; sc" : : : "r0", "r3");
+}
+
+static void yield_shared_processor(void)
+{
+	unsigned long tb;
+
+	HvCall_setEnabledInterrupts(HvCall_MaskIPI |
+				    HvCall_MaskLpEvent |
+				    HvCall_MaskLpProd |
+				    HvCall_MaskTimeout);
+
+	tb = get_tb();
+	/* Compute future tb value when yield should expire */
+	HvCall_yieldProcessor(HvCall_YieldTimed, tb+tb_ticks_per_jiffy);
+
+	/*
+	 * The decrementer stops during the yield.  Force a fake decrementer
+	 * here and let the timer_interrupt code sort out the actual time.
+	 */
+	get_paca()->lppaca.int_dword.fields.decr_int = 1;
+	process_iSeries_events();
+}
+
+static int iseries_shared_idle(void)
+{
+	while (1) {
+		while (!need_resched() && !hvlpevent_is_pending()) {
+			local_irq_disable();
+			ppc64_runlatch_off();
+
+			/* Recheck with irqs off */
+			if (!need_resched() && !hvlpevent_is_pending())
+				yield_shared_processor();
+
+			HMT_medium();
+			local_irq_enable();
+		}
+
+		ppc64_runlatch_on();
+
+		if (hvlpevent_is_pending())
+			process_iSeries_events();
+
+		schedule();
+	}
+
+	return 0;
+}
+
+static int iseries_dedicated_idle(void)
+{
+	long oldval;
+
+	while (1) {
+		oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
+
+		if (!oldval) {
+			set_thread_flag(TIF_POLLING_NRFLAG);
+
+			while (!need_resched()) {
+				ppc64_runlatch_off();
+				HMT_low();
+
+				if (hvlpevent_is_pending()) {
+					HMT_medium();
+					ppc64_runlatch_on();
+					process_iSeries_events();
+				}
+			}
+
+			HMT_medium();
+			clear_thread_flag(TIF_POLLING_NRFLAG);
+		} else {
+			set_need_resched();
+		}
+
+		ppc64_runlatch_on();
+		schedule();
+	}
+
+	return 0;
+}
+
 #ifndef CONFIG_PCI
 void __init iSeries_init_IRQ(void) { }
 #endif
@@ -859,5 +945,13 @@ void __init iSeries_early_setup(void)
 	ppc_md.get_rtc_time = iSeries_get_rtc_time;
 	ppc_md.calibrate_decr = iSeries_calibrate_decr;
 	ppc_md.progress = iSeries_progress;
+
+	if (get_paca()->lppaca.shared_proc) {
+		ppc_md.idle_loop = iseries_shared_idle;
+		printk(KERN_INFO "Using shared processor idle loop\n");
+	} else {
+		ppc_md.idle_loop = iseries_dedicated_idle;
+		printk(KERN_INFO "Using dedicated idle loop\n");
+	}
 }
 

arch/ppc64/kernel/idle.c

@@ -20,109 +20,18 @@
 #include <linux/kernel.h>
 #include <linux/smp.h>
 #include <linux/cpu.h>
-#include <linux/module.h>
 #include <linux/sysctl.h>
-#include <linux/smp.h>
 
 #include <asm/system.h>
 #include <asm/processor.h>
-#include <asm/mmu.h>
 #include <asm/cputable.h>
 #include <asm/time.h>
-#include <asm/iSeries/HvCall.h>
-#include <asm/iSeries/ItLpQueue.h>
-#include <asm/plpar_wrappers.h>
 #include <asm/systemcfg.h>
+#include <asm/machdep.h>
 
 extern void power4_idle(void);
 
-static int (*idle_loop)(void);
-
-#ifdef CONFIG_PPC_ISERIES
-static unsigned long maxYieldTime = 0;
-static unsigned long minYieldTime = 0xffffffffffffffffUL;
-
-static inline void process_iSeries_events(void)
-{
-	asm volatile ("li 0,0x5555; sc" : : : "r0", "r3");
-}
-
-static void yield_shared_processor(void)
-{
-	unsigned long tb;
-	unsigned long yieldTime;
-
-	HvCall_setEnabledInterrupts(HvCall_MaskIPI |
-				    HvCall_MaskLpEvent |
-				    HvCall_MaskLpProd |
-				    HvCall_MaskTimeout);
-
-	tb = get_tb();
-	/* Compute future tb value when yield should expire */
-	HvCall_yieldProcessor(HvCall_YieldTimed, tb+tb_ticks_per_jiffy);
-
-	yieldTime = get_tb() - tb;
-	if (yieldTime > maxYieldTime)
-		maxYieldTime = yieldTime;
-
-	if (yieldTime < minYieldTime)
-		minYieldTime = yieldTime;
-	
-	/*
-	 * The decrementer stops during the yield.  Force a fake decrementer
-	 * here and let the timer_interrupt code sort out the actual time.
-	 */
-	get_paca()->lppaca.int_dword.fields.decr_int = 1;
-	process_iSeries_events();
-}
-
-static int iSeries_idle(void)
-{
-	struct paca_struct *lpaca;
-	long oldval;
-
-	/* ensure iSeries run light will be out when idle */
-	ppc64_runlatch_off();
-
-	lpaca = get_paca();
-
-	while (1) {
-		if (lpaca->lppaca.shared_proc) {
-			if (hvlpevent_is_pending())
-				process_iSeries_events();
-			if (!need_resched())
-				yield_shared_processor();
-		} else {
-			oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
-
-			if (!oldval) {
-				set_thread_flag(TIF_POLLING_NRFLAG);
-
-				while (!need_resched()) {
-					HMT_medium();
-					if (hvlpevent_is_pending())
-						process_iSeries_events();
-					HMT_low();
-				}
-
-				HMT_medium();
-				clear_thread_flag(TIF_POLLING_NRFLAG);
-			} else {
-				set_need_resched();
-			}
-		}
-
-		ppc64_runlatch_on();
-		schedule();
-		ppc64_runlatch_off();
-	}
-
-	return 0;
-}
-
-#else
-
-static int default_idle(void)
+int default_idle(void)
 {
 	long oldval;
 	unsigned int cpu = smp_processor_id();
@@ -134,7 +43,8 @@ static int default_idle(void)
 			set_thread_flag(TIF_POLLING_NRFLAG);
 
 			while (!need_resched() && !cpu_is_offline(cpu)) {
-				barrier();
+				ppc64_runlatch_off();
+
 				/*
 				 * Go into low thread priority and possibly
 				 * low power mode.
@@ -149,6 +59,7 @@ static int default_idle(void)
 			set_need_resched();
 		}
 
+		ppc64_runlatch_on();
 		schedule();
 		if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
 			cpu_die();
@@ -157,127 +68,19 @@ static int default_idle(void)
 	return 0;
 }
 
-#ifdef CONFIG_PPC_PSERIES
-
-DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
-
-int dedicated_idle(void)
+int native_idle(void)
 {
-	long oldval;
-	struct paca_struct *lpaca = get_paca(), *ppaca;
-	unsigned long start_snooze;
-	unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay);
-	unsigned int cpu = smp_processor_id();
-
-	ppaca = &paca[cpu ^ 1];
-
 	while (1) {
-		/*
-		 * Indicate to the HV that we are idle. Now would be
-		 * a good time to find other work to dispatch.
-		 */
-		lpaca->lppaca.idle = 1;
-
-		oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
-		if (!oldval) {
-			set_thread_flag(TIF_POLLING_NRFLAG);
-			start_snooze = __get_tb() +
-				*smt_snooze_delay * tb_ticks_per_usec;
-			while (!need_resched() && !cpu_is_offline(cpu)) {
-				/*
-				 * Go into low thread priority and possibly
-				 * low power mode.
-				 */
-				HMT_low();
-				HMT_very_low();
-
-				if (*smt_snooze_delay == 0 ||
-				    __get_tb() < start_snooze)
-					continue;
-
-				HMT_medium();
-
-				if (!(ppaca->lppaca.idle)) {
-					local_irq_disable();
-
-					/*
-					 * We are about to sleep the thread
-					 * and so wont be polling any
-					 * more.
-					 */
-					clear_thread_flag(TIF_POLLING_NRFLAG);
-
-					/*
-					 * SMT dynamic mode. Cede will result
-					 * in this thread going dormant, if the
-					 * partner thread is still doing work.
-					 * Thread wakes up if partner goes idle,
-					 * an interrupt is presented, or a prod
-					 * occurs.  Returning from the cede
-					 * enables external interrupts.
-					 */
-					if (!need_resched())
-						cede_processor();
-					else
-						local_irq_enable();
-				} else {
-					/*
-					 * Give the HV an opportunity at the
-					 * processor, since we are not doing
-					 * any work.
-					 */
-					poll_pending();
-				}
-			}
-
-			clear_thread_flag(TIF_POLLING_NRFLAG);
-		} else {
-			set_need_resched();
-		}
-
-		HMT_medium();
-		lpaca->lppaca.idle = 0;
-		schedule();
-		if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
-			cpu_die();
-	}
-	return 0;
-}
-
-static int shared_idle(void)
-{
-	struct paca_struct *lpaca = get_paca();
-	unsigned int cpu = smp_processor_id();
-
-	while (1) {
-		/*
-		 * Indicate to the HV that we are idle. Now would be
-		 * a good time to find other work to dispatch.
-		 */
-		lpaca->lppaca.idle = 1;
+		ppc64_runlatch_off();
 
-		while (!need_resched() && !cpu_is_offline(cpu)) {
-			local_irq_disable();
+		if (!need_resched())
+			power4_idle();
 
-			/*
-			 * Yield the processor to the hypervisor.  We return if
-			 * an external interrupt occurs (which are driven prior
-			 * to returning here) or if a prod occurs from another 
-			 * processor. When returning here, external interrupts
-			 * are enabled.
-			 *
-			 * Check need_resched() again with interrupts disabled
-			 * to avoid a race.
-			 */
-			if (!need_resched())
-				cede_processor();
-			else
-				local_irq_enable();
+		if (need_resched()) {
+			ppc64_runlatch_on();
+			schedule();
 		}
 
-		HMT_medium();
-		lpaca->lppaca.idle = 0;
-		schedule();
 		if (cpu_is_offline(smp_processor_id()) &&
 		    system_state == SYSTEM_RUNNING)
 			cpu_die();
@@ -286,29 +89,10 @@ static int shared_idle(void)
 	return 0;
 }
 
-#endif /* CONFIG_PPC_PSERIES */
-
-static int native_idle(void)
-{
-	while(1) {
-		/* check CPU type here */
-		if (!need_resched())
-			power4_idle();
-		if (need_resched())
-			schedule();
-
-		if (cpu_is_offline(raw_smp_processor_id()) &&
-		    system_state == SYSTEM_RUNNING)
-			cpu_die();
-	}
-	return 0;
-}
-
-#endif /* CONFIG_PPC_ISERIES */
-
 void cpu_idle(void)
 {
-	idle_loop();
+	BUG_ON(NULL == ppc_md.idle_loop);
+	ppc_md.idle_loop();
 }
 
 int powersave_nap;
@@ -342,42 +126,3 @@ register_powersave_nap_sysctl(void)
 }
 __initcall(register_powersave_nap_sysctl);
 #endif
-
-int idle_setup(void)
-{
-	/*
-	 * Move that junk to each platform specific file, eventually define
-	 * a pSeries_idle for shared processor stuff
-	 */
-#ifdef CONFIG_PPC_ISERIES
-	idle_loop = iSeries_idle;
-	return 1;
-#else
-	idle_loop = default_idle;
-#endif
-#ifdef CONFIG_PPC_PSERIES
-	if (systemcfg->platform & PLATFORM_PSERIES) {
-		if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) {
-			if (get_paca()->lppaca.shared_proc) {
-				printk(KERN_INFO "Using shared processor idle loop\n");
-				idle_loop = shared_idle;
-			} else {
-				printk(KERN_INFO "Using dedicated idle loop\n");
-				idle_loop = dedicated_idle;
-			}
-		} else {
-			printk(KERN_INFO "Using default idle loop\n");
-			idle_loop = default_idle;
-		}
-	}
-#endif /* CONFIG_PPC_PSERIES */
-#ifndef CONFIG_PPC_ISERIES
-	if (systemcfg->platform == PLATFORM_POWERMAC ||
-	    systemcfg->platform == PLATFORM_MAPLE) {
-		printk(KERN_INFO "Using native/NAP idle loop\n");
-		idle_loop = native_idle;
-	}
-#endif /* CONFIG_PPC_ISERIES */
-
-	return 1;
-}

arch/ppc64/kernel/maple_setup.c

@@ -177,6 +177,8 @@ void __init maple_setup_arch(void)
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif
+
+	printk(KERN_INFO "Using native/NAP idle loop\n");
 }
 
 /* 
@@ -297,4 +299,5 @@ struct machdep_calls __initdata maple_md = {
        	.get_rtc_time		= maple_get_rtc_time,
       	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= maple_progress,
+	.idle_loop		= native_idle,
 };

arch/ppc64/kernel/misc.S

@@ -1124,9 +1124,11 @@ _GLOBAL(sys_call_table32)
 	.llong .compat_sys_mq_getsetattr
 	.llong .compat_sys_kexec_load
 	.llong .sys32_add_key
-	.llong .sys32_request_key
+	.llong .sys32_request_key	/* 270 */
 	.llong .compat_sys_keyctl
 	.llong .compat_sys_waitid
+	.llong .sys32_ioprio_set
+	.llong .sys32_ioprio_get
 
 	.balign 8
 _GLOBAL(sys_call_table)
@@ -1403,3 +1405,5 @@ _GLOBAL(sys_call_table)
 	.llong .sys_request_key		/* 270 */
 	.llong .sys_keyctl
 	.llong .sys_waitid
+	.llong .sys_ioprio_set
+	.llong .sys_ioprio_get

arch/ppc64/kernel/pSeries_setup.c

@@ -19,6 +19,7 @@
 #undef DEBUG
 
 #include <linux/config.h>
+#include <linux/cpu.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
@@ -82,6 +83,9 @@ int fwnmi_active;  /* TRUE if an FWNMI handler is present */
 extern void pSeries_system_reset_exception(struct pt_regs *regs);
 extern int pSeries_machine_check_exception(struct pt_regs *regs);
 
+static int pseries_shared_idle(void);
+static int pseries_dedicated_idle(void);
+
 static volatile void __iomem * chrp_int_ack_special;
 struct mpic *pSeries_mpic;
 
@@ -229,6 +233,20 @@ static void __init pSeries_setup_arch(void)
 
 	if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR)
 		vpa_init(boot_cpuid);
+
+	/* Choose an idle loop */
+	if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) {
+		if (get_paca()->lppaca.shared_proc) {
+			printk(KERN_INFO "Using shared processor idle loop\n");
+			ppc_md.idle_loop = pseries_shared_idle;
+		} else {
+			printk(KERN_INFO "Using dedicated idle loop\n");
+			ppc_md.idle_loop = pseries_dedicated_idle;
+		}
+	} else {
+		printk(KERN_INFO "Using default idle loop\n");
+		ppc_md.idle_loop = default_idle;
+	}
 }
 
 static int __init pSeries_init_panel(void)
@@ -418,6 +436,144 @@ static int __init pSeries_probe(int platform)
 	return 1;
 }
 
+DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
+
+static inline void dedicated_idle_sleep(unsigned int cpu)
+{
+	struct paca_struct *ppaca = &paca[cpu ^ 1];
+
+	/* Only sleep if the other thread is not idle */
+	if (!(ppaca->lppaca.idle)) {
+		local_irq_disable();
+
+		/*
+		 * We are about to sleep the thread and so wont be polling any
+		 * more.
+		 */
+		clear_thread_flag(TIF_POLLING_NRFLAG);
+
+		/*
+		 * SMT dynamic mode. Cede will result in this thread going
+		 * dormant, if the partner thread is still doing work.  Thread
+		 * wakes up if partner goes idle, an interrupt is presented, or
+		 * a prod occurs.  Returning from the cede enables external
+		 * interrupts.
+		 */
+		if (!need_resched())
+			cede_processor();
+		else
+			local_irq_enable();
+	} else {
+		/*
+		 * Give the HV an opportunity at the processor, since we are
+		 * not doing any work.
+		 */
+		poll_pending();
+	}
+}
+
+static int pseries_dedicated_idle(void)
+{
+	long oldval;
+	struct paca_struct *lpaca = get_paca();
+	unsigned int cpu = smp_processor_id();
+	unsigned long start_snooze;
+	unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay);
+
+	while (1) {
+		/*
+		 * Indicate to the HV that we are idle. Now would be
+		 * a good time to find other work to dispatch.
+		 */
+		lpaca->lppaca.idle = 1;
+
+		oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
+		if (!oldval) {
+			set_thread_flag(TIF_POLLING_NRFLAG);
+
+			start_snooze = __get_tb() +
+				*smt_snooze_delay * tb_ticks_per_usec;
+
+			while (!need_resched() && !cpu_is_offline(cpu)) {
+				ppc64_runlatch_off();
+
+				/*
+				 * Go into low thread priority and possibly
+				 * low power mode.
+				 */
+				HMT_low();
+				HMT_very_low();
+
+				if (*smt_snooze_delay != 0 &&
+				    __get_tb() > start_snooze) {
+					HMT_medium();
+					dedicated_idle_sleep(cpu);
+				}
+
+			}
+
+			HMT_medium();
+			clear_thread_flag(TIF_POLLING_NRFLAG);
+		} else {
+			set_need_resched();
+		}
+
+		lpaca->lppaca.idle = 0;
+		ppc64_runlatch_on();
+
+		schedule();
+
+		if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
+			cpu_die();
+	}
+}
+
+static int pseries_shared_idle(void)
+{
+	struct paca_struct *lpaca = get_paca();
+	unsigned int cpu = smp_processor_id();
+
+	while (1) {
+		/*
+		 * Indicate to the HV that we are idle. Now would be
+		 * a good time to find other work to dispatch.
+		 */
+		lpaca->lppaca.idle = 1;
+
+		while (!need_resched() && !cpu_is_offline(cpu)) {
+			local_irq_disable();
+			ppc64_runlatch_off();
+
+			/*
+			 * Yield the processor to the hypervisor.  We return if
+			 * an external interrupt occurs (which are driven prior
+			 * to returning here) or if a prod occurs from another
+			 * processor. When returning here, external interrupts
+			 * are enabled.
+			 *
+			 * Check need_resched() again with interrupts disabled
+			 * to avoid a race.
+			 */
+			if (!need_resched())
+				cede_processor();
+			else
+				local_irq_enable();
+
+			HMT_medium();
+		}
+
+		lpaca->lppaca.idle = 0;
+		ppc64_runlatch_on();
+
+		schedule();
+
+		if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
+			cpu_die();
+	}
+
+	return 0;
+}
+
 struct machdep_calls __initdata pSeries_md = {
 	.probe			= pSeries_probe,
 	.setup_arch		= pSeries_setup_arch,

arch/ppc64/kernel/pmac_setup.c

@@ -186,6 +186,8 @@ void __init pmac_setup_arch(void)
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif
+
+	printk(KERN_INFO "Using native/NAP idle loop\n");
 }
 
 #ifdef CONFIG_SCSI
@@ -507,5 +509,6 @@ struct machdep_calls __initdata pmac_md = {
       	.calibrate_decr		= pmac_calibrate_decr,
 	.feature_call		= pmac_do_feature_call,
 	.progress		= pmac_progress,
-	.check_legacy_ioport	= pmac_check_legacy_ioport
+	.check_legacy_ioport	= pmac_check_legacy_ioport,
+	.idle_loop		= native_idle,
 };

arch/ppc64/kernel/setup.c

@@ -96,7 +96,6 @@ extern void udbg_init_maple_realmode(void);
 extern unsigned long klimit;
 
 extern void mm_init_ppc64(void);
-extern int  idle_setup(void);
 extern void stab_initialize(unsigned long stab);
 extern void htab_initialize(void);
 extern void early_init_devtree(void *flat_dt);
@@ -1081,8 +1080,11 @@ void __init setup_arch(char **cmdline_p)
 
 	ppc_md.setup_arch();
 
-	/* Select the correct idle loop for the platform. */
-	idle_setup();
+	/* Use the default idle loop if the platform hasn't provided one. */
+	if (NULL == ppc_md.idle_loop) {
+		ppc_md.idle_loop = default_idle;
+		printk(KERN_INFO "Using default idle loop\n");
+	}
 
 	paging_init();
 	ppc64_boot_msg(0x15, "Setup Done");

arch/ppc64/kernel/sys_ppc32.c

@@ -30,47 +30,26 @@
 #include <linux/sem.h>
 #include <linux/msg.h>
 #include <linux/shm.h>
-#include <linux/slab.h>
-#include <linux/uio.h>
-#include <linux/aio.h>
-#include <linux/nfs_fs.h>
-#include <linux/module.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
-#include <linux/nfsd/syscall.h>
 #include <linux/poll.h>
 #include <linux/personality.h>
 #include <linux/stat.h>
-#include <linux/filter.h>
-#include <linux/highmem.h>
-#include <linux/highuid.h>
 #include <linux/mman.h>
-#include <linux/ipv6.h>
 #include <linux/in.h>
-#include <linux/icmpv6.h>
 #include <linux/syscalls.h>
 #include <linux/unistd.h>
 #include <linux/sysctl.h>
 #include <linux/binfmts.h>
-#include <linux/dnotify.h>
 #include <linux/security.h>
 #include <linux/compat.h>
 #include <linux/ptrace.h>
-#include <linux/aio_abi.h>
 #include <linux/elf.h>
 
-#include <net/scm.h>
-#include <net/sock.h>
-
 #include <asm/ptrace.h>
 #include <asm/types.h>
 #include <asm/ipc.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/semaphore.h>
-#include <asm/ppcdebug.h>
 #include <asm/time.h>
 #include <asm/mmu_context.h>
 #include <asm/systemcfg.h>
@@ -350,8 +329,6 @@ asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 	return ret;
 }
 
-
-/* These are here just in case some old sparc32 binary calls it. */
 asmlinkage long sys32_pause(void)
 {
 	current->state = TASK_INTERRUPTIBLE;
@@ -360,8 +337,6 @@ asmlinkage long sys32_pause(void)
 	return -ERESTARTNOHAND;
 }
 
-
-
 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 {
 	long usec;
@@ -847,16 +822,6 @@ asmlinkage long sys32_getpgid(u32 pid)
 }
 
 
-/* Note: it is necessary to treat which and who as unsigned ints,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long sys32_getpriority(u32 which, u32 who)
-{
-	return sys_getpriority((int)which, (int)who);
-}
-
 
 /* Note: it is necessary to treat pid as an unsigned int,
  * with the corresponding cast to a signed int to insure that the 
@@ -1048,6 +1013,11 @@ asmlinkage long sys32_setpgid(u32 pid, u32 pgid)
 	return sys_setpgid((int)pid, (int)pgid);
 }
 
+long sys32_getpriority(u32 which, u32 who)
+{
+	/* sign extend which and who */
+	return sys_getpriority((int)which, (int)who);
+}
 
 long sys32_setpriority(u32 which, u32 who, u32 niceval)
 {
@@ -1055,6 +1025,18 @@ long sys32_setpriority(u32 which, u32 who, u32 niceval)
 	return sys_setpriority((int)which, (int)who, (int)niceval);
 }
 
+long sys32_ioprio_get(u32 which, u32 who)
+{
+	/* sign extend which and who */
+	return sys_ioprio_get((int)which, (int)who);
+}
+
+long sys32_ioprio_set(u32 which, u32 who, u32 ioprio)
+{
+	/* sign extend which, who and ioprio */
+	return sys_ioprio_set((int)which, (int)who, (int)ioprio);
+}
+
 /* Note: it is necessary to treat newmask as an unsigned int,
  * with the corresponding cast to a signed int to insure that the 
  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
@@ -1273,8 +1255,6 @@ long ppc32_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
 			     (u64)len_high << 32 | len_low, advice);
 }
 
-extern asmlinkage long sys_timer_create(clockid_t, sigevent_t __user *, timer_t __user *);
-
 long ppc32_timer_create(clockid_t clock,
 			struct compat_sigevent __user *ev32,
 			timer_t __user *timer_id)

arch/ppc64/kernel/sysfs.c

@@ -112,7 +112,6 @@ void ppc64_enable_pmcs(void)
 	unsigned long hid0;
 #ifdef CONFIG_PPC_PSERIES
 	unsigned long set, reset;
-	int ret;
 #endif /* CONFIG_PPC_PSERIES */
 
 	/* Only need to enable them once */
@@ -145,11 +144,7 @@ void ppc64_enable_pmcs(void)
 	case PLATFORM_PSERIES_LPAR:
 		set = 1UL << 63;
 		reset = 0;
-		ret = plpar_hcall_norets(H_PERFMON, set, reset);
-		if (ret)
-			printk(KERN_ERR "H_PERFMON call on cpu %u "
-			       "returned %d\n",
-			       smp_processor_id(), ret);
+		plpar_hcall_norets(H_PERFMON, set, reset);
 		break;
 #endif /* CONFIG_PPC_PSERIES */
 
@@ -161,13 +156,6 @@ void ppc64_enable_pmcs(void)
 	/* instruct hypervisor to maintain PMCs */
 	if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR)
 		get_paca()->lppaca.pmcregs_in_use = 1;
-
-	/*
-	 * On SMT machines we have to set the run latch in the ctrl register
-	 * in order to make PMC6 spin.
-	 */
-	if (cpu_has_feature(CPU_FTR_SMT))
-		ppc64_runlatch_on();
 #endif /* CONFIG_PPC_PSERIES */
 }
 

arch/ppc64/kernel/vdso32/vdso32.lds.S

@@ -40,9 +40,9 @@ SECTIONS
   .gcc_except_table	: { *(.gcc_except_table) }
   .fixup		: { *(.fixup) }
 
-  .got ALIGN(4)		: { *(.got.plt) *(.got) }
-
   .dynamic		: { *(.dynamic) }		:text	:dynamic
+  .got : { *(.got) }
+  .plt : { *(.plt) }
 
   _end = .;
   __end = .;

arch/um/Kconfig

@@ -128,7 +128,6 @@ config HOSTFS
 
 config HPPFS
 	tristate "HoneyPot ProcFS (EXPERIMENTAL)"
-	depends on BROKEN
 	help
 	hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
 	entries to be overridden, removed, or fabricated from the host.
@@ -141,8 +140,9 @@ config HPPFS
 	You only need this if you are setting up a UML honeypot.  Otherwise,
 	it is safe to say 'N' here.
 
-	If you are actively using it, please ask for it to be fixed. In this
-	moment, it does not work on 2.6 (it works somehow on 2.4).
+	If you are actively using it, please report any problems, since it's
+	getting fixed. In this moment, it is experimental on 2.6 (it works on
+	2.4).
 
 config MCONSOLE
 	bool "Management console"

arch/um/Kconfig_i386

@@ -19,6 +19,18 @@ config 3_LEVEL_PGTABLES
 	memory.  All the memory that can't be mapped directly will be treated
 	as high memory.
 
+config STUB_CODE
+	hex
+	default 0xbfffe000
+
+config STUB_DATA
+	hex
+	default 0xbffff000
+
+config STUB_START
+	hex
+	default STUB_CODE
+
 config ARCH_HAS_SC_SIGNALS
 	bool
 	default y

arch/um/Kconfig_x86_64

@@ -14,6 +14,18 @@ config 3_LEVEL_PGTABLES
        bool
        default y
 
+config STUB_CODE
+	hex
+	default 0x7fbfffe000
+
+config STUB_DATA
+	hex
+	default 0x7fbffff000
+
+config STUB_START
+	hex
+	default STUB_CODE
+
 config ARCH_HAS_SC_SIGNALS
 	bool
 	default n

arch/um/Makefile-i386

@@ -8,7 +8,7 @@ ifeq ($(CONFIG_MODE_SKAS),y)
   endif
 endif
 
-CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH)
+CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS)
 ARCH_USER_CFLAGS :=
 
 ifneq ($(CONFIG_GPROF),y)

arch/um/Makefile-x86_64

@@ -4,7 +4,7 @@
 SUBARCH_LIBS := arch/um/sys-x86_64/
 START := 0x60000000
 
-CFLAGS += -U__$(SUBARCH)__ -fno-builtin
+CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS)
 ARCH_USER_CFLAGS := -D__x86_64__
 
 ELF_ARCH := i386:x86-64

arch/um/defconfig

 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.12-rc3-skas3-v9-pre2
-# Sun Apr 24 19:46:10 2005
+# Linux kernel version: 2.6.12-rc6-mm1
+# Tue Jun 14 18:22:21 2005
 #
 CONFIG_GENERIC_HARDIRQS=y
 CONFIG_UML=y
@@ -13,23 +13,32 @@ CONFIG_GENERIC_CALIBRATE_DELAY=y
 #
 # UML-specific options
 #
-CONFIG_MODE_TT=y
+# CONFIG_MODE_TT is not set
+# CONFIG_STATIC_LINK is not set
 CONFIG_MODE_SKAS=y
 CONFIG_UML_X86=y
 # CONFIG_64BIT is not set
 CONFIG_TOP_ADDR=0xc0000000
 # CONFIG_3_LEVEL_PGTABLES is not set
+CONFIG_STUB_CODE=0xbfffe000
+CONFIG_STUB_DATA=0xbffff000
+CONFIG_STUB_START=0xbfffe000
 CONFIG_ARCH_HAS_SC_SIGNALS=y
 CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
-CONFIG_LD_SCRIPT_STATIC=y
+CONFIG_SELECT_MEMORY_MODEL=y
+CONFIG_FLATMEM_MANUAL=y
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+# CONFIG_SPARSEMEM_MANUAL is not set
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+CONFIG_LD_SCRIPT_DYN=y
 CONFIG_NET=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
-CONFIG_HOSTFS=y
+# CONFIG_HOSTFS is not set
 CONFIG_MCONSOLE=y
 # CONFIG_MAGIC_SYSRQ is not set
 # CONFIG_HOST_2G_2G is not set
-# CONFIG_SMP is not set
 CONFIG_NEST_LEVEL=0
 CONFIG_KERNEL_HALF_GIGS=1
 # CONFIG_HIGHMEM is not set
@@ -63,6 +72,8 @@ CONFIG_IKCONFIG_PROC=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 CONFIG_KALLSYMS_EXTRA_PASS=y
+CONFIG_PRINTK=y
+CONFIG_BUG=y
 CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
@@ -81,6 +92,7 @@ CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODULE_FORCE_UNLOAD is not set
 CONFIG_OBSOLETE_MODPARM=y
+# CONFIG_MODVERSIONS is not set
 # CONFIG_MODULE_SRCVERSION_ALL is not set
 CONFIG_KMOD=y
 
@@ -115,6 +127,7 @@ CONFIG_UML_SOUND=m
 CONFIG_SOUND=m
 CONFIG_HOSTAUDIO=m
 CONFIG_UML_RANDOM=y
+# CONFIG_MMAPPER is not set
 
 #
 # Block devices
@@ -176,6 +189,17 @@ CONFIG_INET=y
 # CONFIG_INET_TUNNEL is not set
 CONFIG_IP_TCPDIAG=y
 # CONFIG_IP_TCPDIAG_IPV6 is not set
+
+#
+# TCP congestion control
+#
+CONFIG_TCP_CONG_BIC=y
+CONFIG_TCP_CONG_WESTWOOD=y
+CONFIG_TCP_CONG_HTCP=y
+# CONFIG_TCP_CONG_HSTCP is not set
+# CONFIG_TCP_CONG_HYBLA is not set
+# CONFIG_TCP_CONG_VEGAS is not set
+# CONFIG_TCP_CONG_SCALABLE is not set
 # CONFIG_IPV6 is not set
 # CONFIG_NETFILTER is not set
 
@@ -206,11 +230,15 @@ CONFIG_IP_TCPDIAG=y
 # Network testing
 #
 # CONFIG_NET_PKTGEN is not set
+# CONFIG_KGDBOE is not set
 # CONFIG_NETPOLL is not set
+# CONFIG_NETPOLL_RX is not set
+# CONFIG_NETPOLL_TRAP is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
 # CONFIG_HAMRADIO is not set
 # CONFIG_IRDA is not set
 # CONFIG_BT is not set
+# CONFIG_IEEE80211 is not set
 CONFIG_DUMMY=m
 # CONFIG_BONDING is not set
 # CONFIG_EQUALIZER is not set
@@ -227,6 +255,7 @@ CONFIG_PPP=m
 # CONFIG_PPP_SYNC_TTY is not set
 # CONFIG_PPP_DEFLATE is not set
 # CONFIG_PPP_BSDCOMP is not set
+# CONFIG_PPP_MPPE is not set
 # CONFIG_PPPOE is not set
 CONFIG_SLIP=m
 # CONFIG_SLIP_COMPRESSED is not set
@@ -240,10 +269,12 @@ CONFIG_SLIP=m
 #
 CONFIG_EXT2_FS=y
 # CONFIG_EXT2_FS_XATTR is not set
+# CONFIG_EXT2_FS_XIP is not set
 CONFIG_EXT3_FS=y
 # CONFIG_EXT3_FS_XATTR is not set
 CONFIG_JBD=y
 # CONFIG_JBD_DEBUG is not set
+# CONFIG_REISER4_FS is not set
 CONFIG_REISERFS_FS=y
 # CONFIG_REISERFS_CHECK is not set
 # CONFIG_REISERFS_PROC_INFO is not set
@@ -256,6 +287,7 @@ CONFIG_REISERFS_FS=y
 # CONFIG_XFS_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_ROMFS_FS is not set
+CONFIG_INOTIFY=y
 CONFIG_QUOTA=y
 # CONFIG_QFMT_V1 is not set
 # CONFIG_QFMT_V2 is not set
@@ -264,6 +296,12 @@ CONFIG_DNOTIFY=y
 CONFIG_AUTOFS_FS=m
 CONFIG_AUTOFS4_FS=m
 
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+# CONFIG_FUSE_FS is not set
+
 #
 # CD-ROM/DVD Filesystems
 #
@@ -291,6 +329,8 @@ CONFIG_TMPFS=y
 # CONFIG_TMPFS_XATTR is not set
 # CONFIG_HUGETLB_PAGE is not set
 CONFIG_RAMFS=y
+# CONFIG_CONFIGFS_FS is not set
+# CONFIG_RELAYFS_FS is not set
 
 #
 # Miscellaneous filesystems
@@ -319,6 +359,7 @@ CONFIG_RAMFS=y
 # CONFIG_NCP_FS is not set
 # CONFIG_CODA_FS is not set
 # CONFIG_AFS_FS is not set
+# CONFIG_9P_FS is not set
 
 #
 # Partition Types
@@ -404,14 +445,15 @@ CONFIG_CRC32=m
 # CONFIG_PRINTK_TIME is not set
 CONFIG_DEBUG_KERNEL=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_DETECT_SOFTLOCKUP=y
 # CONFIG_SCHEDSTATS is not set
-# CONFIG_DEBUG_SLAB is not set
+CONFIG_DEBUG_SLAB=y
 # CONFIG_DEBUG_SPINLOCK is not set
 # CONFIG_DEBUG_SPINLOCK_SLEEP is not set
 # CONFIG_DEBUG_KOBJECT is not set
 CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_FS is not set
 CONFIG_FRAME_POINTER=y
-CONFIG_PT_PROXY=y
+# CONFIG_GPROF is not set
 # CONFIG_GCOV is not set
 # CONFIG_SYSCALL_DEBUG is not set

arch/um/drivers/line.c

@@ -663,11 +663,15 @@ struct tty_driver *line_register_devfs(struct lines *set,
 	return driver;
 }
 
+static spinlock_t winch_handler_lock;
+LIST_HEAD(winch_handlers);
+
 void lines_init(struct line *lines, int nlines)
 {
 	struct line *line;
 	int i;
 
+	spin_lock_init(&winch_handler_lock);
 	for(i = 0; i < nlines; i++){
 		line = &lines[i];
 		INIT_LIST_HEAD(&line->chan_list);
@@ -724,31 +728,30 @@ irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
 	return IRQ_HANDLED;
 }
 
-DECLARE_MUTEX(winch_handler_sem);
-LIST_HEAD(winch_handlers);
-
 void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty)
 {
 	struct winch *winch;
 
-	down(&winch_handler_sem);
 	winch = kmalloc(sizeof(*winch), GFP_KERNEL);
 	if (winch == NULL) {
 		printk("register_winch_irq - kmalloc failed\n");
-		goto out;
+		return;
 	}
+
 	*winch = ((struct winch) { .list  	= LIST_HEAD_INIT(winch->list),
 				   .fd  	= fd,
 				   .tty_fd 	= tty_fd,
 				   .pid  	= pid,
 				   .tty 	= tty });
+
+	spin_lock(&winch_handler_lock);
 	list_add(&winch->list, &winch_handlers);
+	spin_unlock(&winch_handler_lock);
+
 	if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
 			  SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM, 
 			  "winch", winch) < 0)
 		printk("register_winch_irq - failed to register IRQ\n");
- out:
-	up(&winch_handler_sem);
 }
 
 static void unregister_winch(struct tty_struct *tty)
@@ -756,7 +759,7 @@ static void unregister_winch(struct tty_struct *tty)
 	struct list_head *ele;
 	struct winch *winch, *found = NULL;
 
-	down(&winch_handler_sem);
+	spin_lock(&winch_handler_lock);
 	list_for_each(ele, &winch_handlers){
 		winch = list_entry(ele, struct winch, list);
                 if(winch->tty == tty){
@@ -764,20 +767,25 @@ static void unregister_winch(struct tty_struct *tty)
                         break;
                 }
         }
-
         if(found == NULL)
-                goto out;
+		goto err;
+
+	list_del(&winch->list);
+	spin_unlock(&winch_handler_lock);
 
         if(winch->pid != -1)
                 os_kill_process(winch->pid, 1);
 
         free_irq(WINCH_IRQ, winch);
-        list_del(&winch->list);
         kfree(winch);
- out:
-	up(&winch_handler_sem);
+
+	return;
+err:
+	spin_unlock(&winch_handler_lock);
 }
 
+/* XXX: No lock as it's an exitcall... is this valid? Depending on cleanup
+ * order... are we sure that nothing else is done on the list? */
 static void winch_cleanup(void)
 {
 	struct list_head *ele;
@@ -786,6 +794,9 @@ static void winch_cleanup(void)
 	list_for_each(ele, &winch_handlers){
 		winch = list_entry(ele, struct winch, list);
 		if(winch->fd != -1){
+			/* Why is this different from the above free_irq(),
+			 * which deactivates SIGIO? This searches the FD
+			 * somewhere else and removes it from the list... */
 			deactivate_fd(winch->fd, WINCH_IRQ);
 			os_close_file(winch->fd);
 		}

arch/um/include/mem.h

@@ -13,6 +13,7 @@ extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
 extern int is_remapped(void *virt);
 extern int physmem_remove_mapping(void *virt);
 extern void physmem_forget_descriptor(int fd);
+extern unsigned long to_phys(void *virt);
 
 #endif
 

arch/um/include/registers.h

@@ -14,6 +14,7 @@ extern int restore_fp_registers(int pid, unsigned long *fp_regs);
 extern void save_registers(int pid, union uml_pt_regs *regs);
 extern void restore_registers(int pid, union uml_pt_regs *regs);
 extern void init_registers(int pid);
+extern void get_safe_registers(unsigned long * regs);
 
 #endif
 

arch/um/include/sysdep-i386/ptrace_user.h

@@ -20,11 +20,24 @@
 #define PT_SYSCALL_ARG3_OFFSET PT_OFFSET(EDX)
 #define PT_SYSCALL_ARG4_OFFSET PT_OFFSET(ESI)
 #define PT_SYSCALL_ARG5_OFFSET PT_OFFSET(EDI)
+#define PT_SYSCALL_ARG6_OFFSET PT_OFFSET(EBP)
 
 #define PT_SYSCALL_RET_OFFSET PT_OFFSET(EAX)
 
+#define REGS_SYSCALL_NR EAX /* This is used before a system call */
+#define REGS_SYSCALL_ARG1 EBX
+#define REGS_SYSCALL_ARG2 ECX
+#define REGS_SYSCALL_ARG3 EDX
+#define REGS_SYSCALL_ARG4 ESI
+#define REGS_SYSCALL_ARG5 EDI
+#define REGS_SYSCALL_ARG6 EBP
+
+#define REGS_IP_INDEX EIP
+#define REGS_SP_INDEX UESP
+
 #define PT_IP_OFFSET PT_OFFSET(EIP)
 #define PT_IP(regs) ((regs)[EIP])
+#define PT_SP_OFFSET PT_OFFSET(UESP)
 #define PT_SP(regs) ((regs)[UESP])
 
 #ifndef FRAME_SIZE

arch/um/include/sysdep-i386/stub.h

+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_STUB_H
+#define __SYSDEP_STUB_H
+
+#include <asm/ptrace.h>
+#include <asm/unistd.h>
+
+extern void stub_segv_handler(int sig);
+extern void stub_clone_handler(void);
+
+#define STUB_SYSCALL_RET EAX
+#define STUB_MMAP_NR __NR_mmap2
+#define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT)
+
+static inline long stub_syscall2(long syscall, long arg1, long arg2)
+{
+	long ret;
+
+	__asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx");
+	__asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx");
+	__asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax");
+	__asm__("int $0x80;" : : : "%eax");
+	__asm__ __volatile__("movl %%eax, %0; " : "=g" (ret) :);
+	return(ret);
+}
+
+static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
+{
+	__asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx");
+	return(stub_syscall2(syscall, arg1, arg2));
+}
+
+static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
+				 long arg4)
+{
+	__asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi");
+	return(stub_syscall3(syscall, arg1, arg2, arg3));
+}
+
+static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
+				 long arg4, long arg5, long arg6)
+{
+	long ret;
+	__asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax");
+	__asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx");
+	__asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx");
+	__asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx");
+	__asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi");
+	__asm__("movl %0, %%edi; " : : "g" (arg5) : "%edi");
+	__asm__ __volatile__("pushl %%ebp ; movl %1, %%ebp; "
+		"int $0x80; popl %%ebp ; "
+		"movl %%eax, %0; " : "=g" (ret) : "g" (arg6) : "%eax");
+	return(ret);
+}
+
+static inline void trap_myself(void)
+{
+	__asm("int3");
+}
+
+#endif

arch/um/include/sysdep-x86_64/ptrace_user.h

@@ -55,6 +55,20 @@
 #define PTRACE_OLDSETOPTIONS 21
 #endif
 
+/* These are before the system call, so the the system call number is RAX
+ * rather than ORIG_RAX, and arg4 is R10 rather than RCX
+ */
+#define REGS_SYSCALL_NR PT_INDEX(RAX)
+#define REGS_SYSCALL_ARG1 PT_INDEX(RDI)
+#define REGS_SYSCALL_ARG2 PT_INDEX(RSI)
+#define REGS_SYSCALL_ARG3 PT_INDEX(RDX)
+#define REGS_SYSCALL_ARG4 PT_INDEX(R10)
+#define REGS_SYSCALL_ARG5 PT_INDEX(R8)
+#define REGS_SYSCALL_ARG6 PT_INDEX(R9)
+
+#define REGS_IP_INDEX PT_INDEX(RIP)
+#define REGS_SP_INDEX PT_INDEX(RSP)
+
 #endif
 
 /*

arch/um/include/sysdep-x86_64/stub.h

+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_STUB_H
+#define __SYSDEP_STUB_H
+
+#include <asm/ptrace.h>
+#include <asm/unistd.h>
+#include <sysdep/ptrace_user.h>
+
+extern void stub_segv_handler(int sig);
+extern void stub_clone_handler(void);
+
+#define STUB_SYSCALL_RET PT_INDEX(RAX)
+#define STUB_MMAP_NR __NR_mmap
+#define MMAP_OFFSET(o) (o)
+
+static inline long stub_syscall2(long syscall, long arg1, long arg2)
+{
+	long ret;
+
+	__asm__("movq %0, %%rsi; " : : "g" (arg2) : "%rsi");
+	__asm__("movq %0, %%rdi; " : : "g" (arg1) : "%rdi");
+	__asm__("movq %0, %%rax; " : : "g" (syscall) : "%rax");
+	__asm__("syscall;" : : : "%rax", "%r11", "%rcx");
+	__asm__ __volatile__("movq %%rax, %0; " : "=g" (ret) :);
+	return(ret);
+}
+
+static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
+{
+	__asm__("movq %0, %%rdx; " : : "g" (arg3) : "%rdx");
+	return(stub_syscall2(syscall, arg1, arg2));
+}
+
+static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
+				 long arg4)
+{
+	__asm__("movq %0, %%r10; " : : "g" (arg4) : "%r10");
+	return(stub_syscall3(syscall, arg1, arg2, arg3));
+}
+
+static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
+				 long arg4, long arg5, long arg6)
+{
+	__asm__("movq %0, %%r9; " : : "g" (arg6) : "%r9");
+	__asm__("movq %0, %%r8; " : : "g" (arg5) : "%r8");
+	return(stub_syscall4(syscall, arg1, arg2, arg3, arg4));
+}
+
+static inline void trap_myself(void)
+{
+	__asm("int3");
+}
+
+#endif

arch/um/include/time_user.h

@@ -10,6 +10,7 @@ extern void timer(void);
 extern void switch_timers(int to_real);
 extern void idle_sleep(int secs);
 extern void enable_timer(void);
+extern void prepare_timer(void * ptr);
 extern void disable_timer(void);
 extern unsigned long time_lock(void);
 extern void time_unlock(unsigned long);

arch/um/include/tlb.h

@@ -37,31 +37,25 @@ struct host_vm_op {
 extern void mprotect_kernel_vm(int w);
 extern void force_flush_all(void);
 extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
-			     unsigned long end_addr, int force, int data,
-			     void (*do_ops)(int, struct host_vm_op *, int));
+                             unsigned long end_addr, int force,
+                             void (*do_ops)(union mm_context *,
+                                            struct host_vm_op *, int));
 extern int flush_tlb_kernel_range_common(unsigned long start,
 					 unsigned long end);
 
 extern int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
 		    int r, int w, int x, struct host_vm_op *ops, int index,
-		    int last_filled, int data,
-		    void (*do_ops)(int, struct host_vm_op *, int));
+                    int last_filled, union mm_context *mmu,
+                    void (*do_ops)(union mm_context *, struct host_vm_op *,
+                                   int));
 extern int add_munmap(unsigned long addr, unsigned long len,
 		      struct host_vm_op *ops, int index, int last_filled,
-		      int data, void (*do_ops)(int, struct host_vm_op *, int));
+                      union mm_context *mmu,
+                      void (*do_ops)(union mm_context *, struct host_vm_op *,
+                                     int));
 extern int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
 			int x, struct host_vm_op *ops, int index,
-			int last_filled, int data,
-			void (*do_ops)(int, struct host_vm_op *, int));
+                        int last_filled, union mm_context *mmu,
+                        void (*do_ops)(union mm_context *, struct host_vm_op *,
+                                       int));
 #endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */

arch/um/kernel/dyn.lds.S

@@ -67,6 +67,12 @@ SECTIONS
     *(.stub .text.* .gnu.linkonce.t.*)
     /* .gnu.warning sections are handled specially by elf32.em.  */
     *(.gnu.warning)
+
+    . = ALIGN(4096);
+    __syscall_stub_start = .;
+    *(.__syscall_stub*)
+    __syscall_stub_end = .;
+    . = ALIGN(4096);
   } =0x90909090
   .fini           : {
     KEEP (*(.fini))

arch/um/kernel/physmem.c

@@ -353,6 +353,8 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
 
 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 
+extern int __syscall_stub_start, __binary_start;
+
 void setup_physmem(unsigned long start, unsigned long reserve_end,
 		   unsigned long len, unsigned long highmem)
 {
@@ -371,6 +373,12 @@ void setup_physmem(unsigned long start, unsigned long reserve_end,
 		exit(1);
 	}
 
+	/* Special kludge - This page will be mapped in to userspace processes
+	 * from physmem_fd, so it needs to be written out there.
+	 */
+	os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
+	os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE);
+
 	bootmap_size = init_bootmem(pfn, pfn + delta);
 	free_bootmem(__pa(reserve_end) + bootmap_size,
 		     len - bootmap_size - reserve);

arch/um/kernel/process.c

@@ -32,6 +32,7 @@
 #include "uml-config.h"
 #include "choose-mode.h"
 #include "mode.h"
+#include "tempfile.h"
 #ifdef UML_CONFIG_MODE_SKAS
 #include "skas.h"
 #include "skas_ptrace.h"
@@ -358,11 +359,16 @@ void forward_pending_sigio(int target)
 		kill(target, SIGIO);
 }
 
+int ptrace_faultinfo = 0;
+int proc_mm = 1;
+
+extern void *__syscall_stub_start, __syscall_stub_end;
+
 #ifdef UML_CONFIG_MODE_SKAS
-static inline int check_skas3_ptrace_support(void)
+static inline void check_skas3_ptrace_support(void)
 {
 	struct ptrace_faultinfo fi;
-	int pid, n, ret = 1;
+	int pid, n;
 
 	printf("Checking for the skas3 patch in the host...");
 	pid = start_ptraced_child();
@@ -374,33 +380,31 @@ static inline int check_skas3_ptrace_support(void)
 		else {
 			perror("not found");
 		}
-		ret = 0;
-	} else {
+	}
+	else {
+		ptrace_faultinfo = 1;
 		printf("found\n");
 	}
 
 	init_registers(pid);
 	stop_ptraced_child(pid, 1, 1);
-
-	return(ret);
 }
 
 int can_do_skas(void)
 {
-	int ret = 1;
-
 	printf("Checking for /proc/mm...");
 	if (os_access("/proc/mm", OS_ACC_W_OK) < 0) {
+		proc_mm = 0;
 		printf("not found\n");
-		ret = 0;
 		goto out;
-	} else {
+	}
+	else {
 		printf("found\n");
 	}
 
-	ret = check_skas3_ptrace_support();
 out:
-	return ret;
+	check_skas3_ptrace_support();
+	return 1;
 }
 #else
 int can_do_skas(void)

arch/um/kernel/skas/Makefile

@@ -3,11 +3,14 @@
 # Licensed under the GPL
 #
 
-obj-y := exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
+obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
 	syscall_kern.o syscall_user.o tlb.o trap_user.o uaccess.o \
 
 subdir- := util
 
-USER_OBJS := process.o
+USER_OBJS := process.o clone.o
 
 include arch/um/scripts/Makefile.rules
+
+# clone.o is in the stub, so it can't be built with profiling
+$(obj)/clone.o : c_flags = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))

arch/um/kernel/skas/clone.c

+#include <sched.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <asm/unistd.h>
+#include <asm/page.h>
+#include "ptrace_user.h"
+#include "skas.h"
+#include "stub-data.h"
+#include "uml-config.h"
+#include "sysdep/stub.h"
+
+/* This is in a separate file because it needs to be compiled with any
+ * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
+ */
+void __attribute__ ((__section__ (".__syscall_stub")))
+stub_clone_handler(void)
+{
+	long err;
+	struct stub_data *from = (struct stub_data *) UML_CONFIG_STUB_DATA;
+
+	err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
+			    UML_CONFIG_STUB_DATA + PAGE_SIZE / 2 -
+			    sizeof(void *));
+	if(err != 0)
+		goto out;
+
+	err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
+	if(err)
+		goto out;
+
+	err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
+			    (long) &from->timer, 0);
+	if(err)
+		goto out;
+
+	err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, PAGE_SIZE,
+			    PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED,
+			    from->fd, from->offset);
+ out:
+	/* save current result. Parent: pid; child: retcode of mmap */
+	from->err = err;
+	trap_myself();
+}

arch/um/kernel/skas/exec_kern.c

@@ -18,7 +18,7 @@
 void flush_thread_skas(void)
 {
 	force_flush_all();
-	switch_mm_skas(current->mm->context.skas.mm_fd);
+        switch_mm_skas(&current->mm->context.skas.id);
 }
 
 void start_thread_skas(struct pt_regs *regs, unsigned long eip, 

arch/um/kernel/skas/include/mm_id.h

+/*
+ * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MM_ID_H
+#define __MM_ID_H
+
+struct mm_id {
+	union {
+		int mm_fd;
+		int pid;
+	} u;
+	unsigned long stack;
+};
+
+#endif

arch/um/kernel/skas/include/mmu-skas.h

@@ -6,10 +6,15 @@
 #ifndef __SKAS_MMU_H
 #define __SKAS_MMU_H
 
+#include "mm_id.h"
+
 struct mmu_context_skas {
-	int mm_fd;
+	struct mm_id id;
+        unsigned long last_page_table;
 };
 
+extern void switch_mm_skas(struct mm_id * mm_idp);
+
 #endif
 
 /*

arch/um/kernel/skas/include/skas.h

@@ -6,9 +6,11 @@
 #ifndef __SKAS_H
 #define __SKAS_H
 
+#include "mm_id.h"
 #include "sysdep/ptrace.h"
 
 extern int userspace_pid[];
+extern int proc_mm, ptrace_faultinfo;
 
 extern void switch_threads(void *me, void *next);
 extern void thread_wait(void *sw, void *fb);
@@ -22,16 +24,18 @@ extern void new_thread_proc(void *stack, void (*handler)(int sig));
 extern void remove_sigstack(void);
 extern void new_thread_handler(int sig);
 extern void handle_syscall(union uml_pt_regs *regs);
-extern void map(int fd, unsigned long virt, unsigned long len, int r, int w,
-		int x, int phys_fd, unsigned long long offset);
-extern int unmap(int fd, void *addr, unsigned long len);
-extern int protect(int fd, unsigned long addr, unsigned long len, 
-		   int r, int w, int x);
+extern int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len,
+               int r, int w, int x, int phys_fd, unsigned long long offset);
+extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len);
+extern int protect(struct mm_id * mm_idp, unsigned long addr,
+		   unsigned long len, int r, int w, int x);
 extern void user_signal(int sig, union uml_pt_regs *regs, int pid);
 extern int new_mm(int from);
-extern void start_userspace(int cpu);
+extern int start_userspace(unsigned long stub_stack);
+extern int copy_context_skas0(unsigned long stack, int pid);
 extern void get_skas_faultinfo(int pid, struct faultinfo * fi);
 extern long execute_syscall_skas(void *r);
+extern unsigned long current_stub_stack(void);
 
 #endif
 

arch/um/kernel/skas/include/stub-data.h

+/*
+ * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __STUB_DATA_H
+#define __STUB_DATA_H
+
+#include <sys/time.h>
+
+struct stub_data {
+	long offset;
+	int fd;
+	struct itimerval timer;
+	long err;
+};
+
+#endif

arch/um/kernel/skas/mem.c

@@ -5,7 +5,9 @@
 
 #include "linux/config.h"
 #include "linux/mm.h"
+#include "asm/pgtable.h"
 #include "mem_user.h"
+#include "skas.h"
 
 unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out, 
 				  unsigned long *task_size_out)
@@ -18,7 +20,9 @@ unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out,
 	*task_size_out = CONFIG_HOST_TASK_SIZE;
 #else
 	*host_size_out = top;
-	*task_size_out = top;
+	if (proc_mm && ptrace_faultinfo)
+		*task_size_out = top;
+	else *task_size_out = CONFIG_STUB_START & PGDIR_MASK;
 #endif
 	return(((unsigned long) set_task_sizes_skas) & ~0xffffff);
 }

arch/um/kernel/skas/mem_user.c

@@ -3,100 +3,171 @@
  * Licensed under the GPL
  */
 
+#include <signal.h>
 #include <errno.h>
 #include <sys/mman.h>
+#include <sys/wait.h>
+#include <asm/page.h>
+#include <asm/unistd.h>
 #include "mem_user.h"
 #include "mem.h"
+#include "mm_id.h"
 #include "user.h"
 #include "os.h"
 #include "proc_mm.h"
-
-void map(int fd, unsigned long virt, unsigned long len, int r, int w,
-	 int x, int phys_fd, unsigned long long offset)
+#include "ptrace_user.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "task.h"
+#include "registers.h"
+#include "uml-config.h"
+#include "sysdep/ptrace.h"
+#include "sysdep/stub.h"
+#include "skas.h"
+
+extern unsigned long syscall_stub, __syscall_stub_start;
+
+extern void wait_stub_done(int pid, int sig, char * fname);
+
+static long run_syscall_stub(struct mm_id * mm_idp, int syscall,
+                             unsigned long *args)
 {
-	struct proc_mm_op map;
-	int prot, n;
-
-	prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | 
-		(x ? PROT_EXEC : 0);
-
-	map = ((struct proc_mm_op) { .op 	= MM_MMAP,
-				     .u 	= 
-				     { .mmap	= 
-				       { .addr 		= virt,
-					 .len		= len,
-					 .prot		= prot,
-					 .flags		= MAP_SHARED | 
-					                  MAP_FIXED,
-					 .fd		= phys_fd,
-					 .offset	= offset
-				       } } } );
-	n = os_write_file(fd, &map, sizeof(map));
-	if(n != sizeof(map)) 
-		printk("map : /proc/mm map failed, err = %d\n", -n);
+        int n, pid = mm_idp->u.pid;
+        unsigned long regs[MAX_REG_NR];
+
+        get_safe_registers(regs);
+        regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE +
+                ((unsigned long) &syscall_stub -
+                 (unsigned long) &__syscall_stub_start);
+        /* XXX Don't have a define for starting a syscall */
+        regs[REGS_SYSCALL_NR] = syscall;
+        regs[REGS_SYSCALL_ARG1] = args[0];
+        regs[REGS_SYSCALL_ARG2] = args[1];
+        regs[REGS_SYSCALL_ARG3] = args[2];
+        regs[REGS_SYSCALL_ARG4] = args[3];
+        regs[REGS_SYSCALL_ARG5] = args[4];
+        regs[REGS_SYSCALL_ARG6] = args[5];
+        n = ptrace_setregs(pid, regs);
+        if(n < 0){
+                printk("run_syscall_stub : PTRACE_SETREGS failed, "
+                       "errno = %d\n", n);
+                return(n);
+        }
+
+        wait_stub_done(pid, 0, "run_syscall_stub");
+
+        return(*((unsigned long *) mm_idp->stack));
 }
 
-int unmap(int fd, void *addr, unsigned long len)
+int map(struct mm_id *mm_idp, unsigned long virt, unsigned long len,
+        int r, int w, int x, int phys_fd, unsigned long long offset)
 {
-	struct proc_mm_op unmap;
-	int n;
-
-	unmap = ((struct proc_mm_op) { .op 	= MM_MUNMAP,
-				       .u 	= 
-				       { .munmap	= 
-					 { .addr 	= (unsigned long) addr,
-					   .len		= len } } } );
-	n = os_write_file(fd, &unmap, sizeof(unmap));
-	if(n != sizeof(unmap)) {
-		if(n < 0)
-			return(n);
-		else if(n > 0)
-			return(-EIO);
-	}
-
-	return(0);
+        int prot, n;
+
+        prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
+                (x ? PROT_EXEC : 0);
+
+        if(proc_mm){
+                struct proc_mm_op map;
+                int fd = mm_idp->u.mm_fd;
+                map = ((struct proc_mm_op) { .op	= MM_MMAP,
+                                             .u		=
+                                             { .mmap	=
+                                               { .addr	= virt,
+                                                 .len	= len,
+                                                 .prot	= prot,
+                                                 .flags	= MAP_SHARED |
+                                                 MAP_FIXED,
+                                                 .fd	= phys_fd,
+                                                 .offset= offset
+                                               } } } );
+                n = os_write_file(fd, &map, sizeof(map));
+                if(n != sizeof(map))
+                        printk("map : /proc/mm map failed, err = %d\n", -n);
+        }
+        else {
+                long res;
+                unsigned long args[] = { virt, len, prot,
+                                         MAP_SHARED | MAP_FIXED, phys_fd,
+                                         MMAP_OFFSET(offset) };
+
+                res = run_syscall_stub(mm_idp, STUB_MMAP_NR, args);
+                if((void *) res == MAP_FAILED)
+                        printk("mmap stub failed, errno = %d\n", res);
+        }
+
+        return 0;
 }
 
-int protect(int fd, unsigned long addr, unsigned long len, int r, int w, 
-	    int x, int must_succeed)
+int unmap(struct mm_id *mm_idp, void *addr, unsigned long len)
 {
-	struct proc_mm_op protect;
-	int prot, n;
-
-	prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | 
-		(x ? PROT_EXEC : 0);
-
-	protect = ((struct proc_mm_op) { .op 	= MM_MPROTECT,
-				       .u 	= 
-				       { .mprotect	= 
-					 { .addr 	= (unsigned long) addr,
-					   .len		= len,
-					   .prot	= prot } } } );
-
-	n = os_write_file(fd, &protect, sizeof(protect));
-	if(n != sizeof(protect)) {
-		if(n == 0) return(0);
-
-		if(must_succeed)
-			panic("protect failed, err = %d", -n);
-
-		return(-EIO);
-	}
+        int n;
+
+        if(proc_mm){
+                struct proc_mm_op unmap;
+                int fd = mm_idp->u.mm_fd;
+                unmap = ((struct proc_mm_op) { .op	= MM_MUNMAP,
+                                               .u	=
+                                               { .munmap	=
+                                                 { .addr	=
+                                                   (unsigned long) addr,
+                                                   .len		= len } } } );
+                n = os_write_file(fd, &unmap, sizeof(unmap));
+                if(n != sizeof(unmap)) {
+                        if(n < 0)
+                                return(n);
+                        else if(n > 0)
+                                return(-EIO);
+                }
+        }
+        else {
+                int res;
+                unsigned long args[] = { (unsigned long) addr, len, 0, 0, 0,
+                                         0 };
+
+                res = run_syscall_stub(mm_idp, __NR_munmap, args);
+                if(res < 0)
+                        printk("munmap stub failed, errno = %d\n", res);
+        }
+
+        return(0);
+}
 
-	return(0);
+int protect(struct mm_id *mm_idp, unsigned long addr, unsigned long len,
+	    int r, int w, int x)
+{
+        struct proc_mm_op protect;
+        int prot, n;
+
+        prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
+                (x ? PROT_EXEC : 0);
+
+        if(proc_mm){
+                int fd = mm_idp->u.mm_fd;
+                protect = ((struct proc_mm_op) { .op	= MM_MPROTECT,
+                                                 .u	=
+                                                 { .mprotect	=
+                                                   { .addr	=
+                                                     (unsigned long) addr,
+                                                     .len	= len,
+                                                     .prot	= prot } } } );
+
+                n = os_write_file(fd, &protect, sizeof(protect));
+                if(n != sizeof(protect))
+                        panic("protect failed, err = %d", -n);
+        }
+        else {
+                int res;
+                unsigned long args[] = { addr, len, prot, 0, 0, 0 };
+
+                res = run_syscall_stub(mm_idp, __NR_mprotect, args);
+                if(res < 0)
+                        panic("mprotect stub failed, errno = %d\n", res);
+        }
+
+        return(0);
 }
 
 void before_mem_skas(unsigned long unused)
 {
 }
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */

arch/um/kernel/skas/mmu.c

@@ -3,46 +3,143 @@
  * Licensed under the GPL
  */
 
+#include "linux/config.h"
 #include "linux/sched.h"
 #include "linux/list.h"
 #include "linux/spinlock.h"
 #include "linux/slab.h"
+#include "linux/errno.h"
+#include "linux/mm.h"
 #include "asm/current.h"
 #include "asm/segment.h"
 #include "asm/mmu.h"
+#include "asm/pgalloc.h"
+#include "asm/pgtable.h"
 #include "os.h"
 #include "skas.h"
 
+extern int __syscall_stub_start;
+
+static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
+			 unsigned long kernel)
+{
+	pgd_t *pgd;
+	pud_t *pud;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	spin_lock(&mm->page_table_lock);
+	pgd = pgd_offset(mm, proc);
+	pud = pud_alloc(mm, pgd, proc);
+	if (!pud)
+		goto out;
+
+	pmd = pmd_alloc(mm, pud, proc);
+	if (!pmd)
+		goto out_pmd;
+
+	pte = pte_alloc_map(mm, pmd, proc);
+	if (!pte)
+		goto out_pte;
+
+	/* There's an interaction between the skas0 stub pages, stack
+	 * randomization, and the BUG at the end of exit_mmap.  exit_mmap
+         * checks that the number of page tables freed is the same as had
+         * been allocated.  If the stack is on the last page table page,
+	 * then the stack pte page will be freed, and if not, it won't.  To
+	 * avoid having to know where the stack is, or if the process mapped
+	 * something at the top of its address space for some other reason,
+	 * we set TASK_SIZE to end at the start of the last page table.
+	 * This keeps exit_mmap off the last page, but introduces a leak
+	 * of that page.  So, we hang onto it here and free it in
+	 * destroy_context_skas.
+	 */
+
+        mm->context.skas.last_page_table = pmd_page_kernel(*pmd);
+
+	*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
+	*pte = pte_mkexec(*pte);
+	*pte = pte_wrprotect(*pte);
+	spin_unlock(&mm->page_table_lock);
+	return(0);
+
+ out_pmd:
+	pud_free(pud);
+ out_pte:
+	pmd_free(pmd);
+ out:
+	spin_unlock(&mm->page_table_lock);
+	return(-ENOMEM);
+}
+
 int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
 {
-	int from;
+	struct mm_struct *cur_mm = current->mm;
+	struct mm_id *cur_mm_id = &cur_mm->context.skas.id;
+	struct mm_id *mm_id = &mm->context.skas.id;
+	unsigned long stack;
+	int from, ret;
 
-	if((current->mm != NULL) && (current->mm != &init_mm))
-		from = current->mm->context.skas.mm_fd;
-	else from = -1;
+	if(proc_mm){
+		if((cur_mm != NULL) && (cur_mm != &init_mm))
+			from = cur_mm->context.skas.id.u.mm_fd;
+		else from = -1;
 
-	mm->context.skas.mm_fd = new_mm(from);
-	if(mm->context.skas.mm_fd < 0){
-		printk("init_new_context_skas - new_mm failed, errno = %d\n",
-		       mm->context.skas.mm_fd);
-		return(mm->context.skas.mm_fd);
+		ret = new_mm(from);
+		if(ret < 0){
+			printk("init_new_context_skas - new_mm failed, "
+			       "errno = %d\n", ret);
+			return ret;
+		}
+		mm_id->u.mm_fd = ret;
 	}
+	else {
+		/* This zeros the entry that pgd_alloc didn't, needed since
+		 * we are about to reinitialize it, and want mm.nr_ptes to
+		 * be accurate.
+		 */
+		mm->pgd[USER_PTRS_PER_PGD] = __pgd(0);
 
-	return(0);
+		ret = init_stub_pte(mm, CONFIG_STUB_CODE,
+				    (unsigned long) &__syscall_stub_start);
+		if(ret)
+			goto out;
+
+		ret = -ENOMEM;
+		stack = get_zeroed_page(GFP_KERNEL);
+		if(stack == 0)
+			goto out;
+		mm_id->stack = stack;
+
+		ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack);
+		if(ret)
+			goto out_free;
+
+		mm->nr_ptes--;
+
+		if((cur_mm != NULL) && (cur_mm != &init_mm))
+			mm_id->u.pid = copy_context_skas0(stack,
+							  cur_mm_id->u.pid);
+		else mm_id->u.pid = start_userspace(stack);
+	}
+
+	return 0;
+
+ out_free:
+	free_page(mm_id->stack);
+ out:
+	return ret;
 }
 
 void destroy_context_skas(struct mm_struct *mm)
 {
-	os_close_file(mm->context.skas.mm_fd);
-}
+	struct mmu_context_skas *mmu = &mm->context.skas;
 
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+	if(proc_mm)
+		os_close_file(mmu->id.u.mm_fd);
+	else {
+		os_kill_ptraced_process(mmu->id.u.pid, 1);
+		free_page(mmu->id.stack);
+		free_page(mmu->last_page_table);
+	}
+}

arch/um/kernel/skas/process.c

 /* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002- 2004 Jeff Dike (jdike@addtoit.com)
  * Licensed under the GPL
  */
 
@@ -13,7 +13,9 @@
 #include <sys/wait.h>
 #include <sys/mman.h>
 #include <sys/user.h>
+#include <sys/time.h>
 #include <asm/unistd.h>
+#include <asm/types.h>
 #include "user.h"
 #include "ptrace_user.h"
 #include "time_user.h"
@@ -21,13 +23,18 @@
 #include "user_util.h"
 #include "kern_util.h"
 #include "skas.h"
+#include "stub-data.h"
+#include "mm_id.h"
 #include "sysdep/sigcontext.h"
+#include "sysdep/stub.h"
 #include "os.h"
 #include "proc_mm.h"
 #include "skas_ptrace.h"
 #include "chan_user.h"
 #include "signal_user.h"
 #include "registers.h"
+#include "mem.h"
+#include "uml-config.h"
 #include "process.h"
 
 int is_skas_winch(int pid, int fd, void *data)
@@ -39,20 +46,55 @@ int is_skas_winch(int pid, int fd, void *data)
 	return(1);
 }
 
-void get_skas_faultinfo(int pid, struct faultinfo * fi)
+void wait_stub_done(int pid, int sig, char * fname)
 {
-	int err;
-
-        err = ptrace(PTRACE_FAULTINFO, pid, 0, fi);
-	if(err)
-                panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, "
-                      "errno = %d\n", errno);
+        int n, status, err;
+
+        do {
+                if ( sig != -1 ) {
+                        err = ptrace(PTRACE_CONT, pid, 0, sig);
+                        if(err)
+                                panic("%s : continue failed, errno = %d\n",
+                                      fname, errno);
+                }
+                sig = 0;
+
+                CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
+        } while((n >= 0) && WIFSTOPPED(status) &&
+                (WSTOPSIG(status) == SIGVTALRM));
+
+        if((n < 0) || !WIFSTOPPED(status) ||
+           (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status != SIGTRAP))){
+                panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
+                      "pid = %d, n = %d, errno = %d, status = 0x%x\n",
+                      fname, pid, n, errno, status);
+        }
+}
 
-        /* Special handling for i386, which has different structs */
-        if (sizeof(struct ptrace_faultinfo) < sizeof(struct faultinfo))
-                memset((char *)fi + sizeof(struct ptrace_faultinfo), 0,
-                       sizeof(struct faultinfo) -
-                       sizeof(struct ptrace_faultinfo));
+void get_skas_faultinfo(int pid, struct faultinfo * fi)
+{
+        int err;
+
+        if(ptrace_faultinfo){
+                err = ptrace(PTRACE_FAULTINFO, pid, 0, fi);
+                if(err)
+                        panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, "
+                              "errno = %d\n", errno);
+
+                /* Special handling for i386, which has different structs */
+                if (sizeof(struct ptrace_faultinfo) < sizeof(struct faultinfo))
+                        memset((char *)fi + sizeof(struct ptrace_faultinfo), 0,
+                               sizeof(struct faultinfo) -
+                               sizeof(struct ptrace_faultinfo));
+        }
+        else {
+                wait_stub_done(pid, SIGSEGV, "get_skas_faultinfo");
+
+                /* faultinfo is prepared by the stub-segv-handler at start of
+                 * the stub stack page. We just have to copy it.
+                 */
+                memcpy(fi, (void *)current_stub_stack(), sizeof(*fi));
+        }
 }
 
 static void handle_segv(int pid, union uml_pt_regs * regs)
@@ -91,11 +133,56 @@ static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu
 	handle_syscall(regs);
 }
 
-static int userspace_tramp(void *arg)
+extern int __syscall_stub_start;
+
+static int userspace_tramp(void *stack)
 {
-	init_new_thread_signals(0);
-	enable_timer();
+	void *addr;
+
 	ptrace(PTRACE_TRACEME, 0, 0, 0);
+
+	init_new_thread_signals(1);
+	enable_timer();
+
+	if(!proc_mm){
+		/* This has a pte, but it can't be mapped in with the usual
+		 * tlb_flush mechanism because this is part of that mechanism
+		 */
+		int fd;
+		__u64 offset;
+
+		fd = phys_mapping(to_phys(&__syscall_stub_start), &offset);
+		addr = mmap64((void *) UML_CONFIG_STUB_CODE, page_size(),
+			      PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
+		if(addr == MAP_FAILED){
+			printk("mapping mmap stub failed, errno = %d\n",
+			       errno);
+			exit(1);
+		}
+
+		if(stack != NULL){
+			fd = phys_mapping(to_phys(stack), &offset);
+			addr = mmap((void *) UML_CONFIG_STUB_DATA, page_size(),
+				    PROT_READ | PROT_WRITE,
+				    MAP_FIXED | MAP_SHARED, fd, offset);
+			if(addr == MAP_FAILED){
+				printk("mapping segfault stack failed, "
+				       "errno = %d\n", errno);
+				exit(1);
+			}
+		}
+	}
+	if(!ptrace_faultinfo && (stack != NULL)){
+		unsigned long v = UML_CONFIG_STUB_CODE +
+				  (unsigned long) stub_segv_handler -
+				  (unsigned long) &__syscall_stub_start;
+
+		set_sigstack((void *) UML_CONFIG_STUB_DATA, page_size());
+		set_handler(SIGSEGV, (void *) v, SA_ONSTACK,
+			    SIGIO, SIGWINCH, SIGALRM, SIGVTALRM,
+			    SIGUSR1, -1);
+	}
+
 	os_stop_process(os_getpid());
 	return(0);
 }
@@ -105,11 +192,11 @@ static int userspace_tramp(void *arg)
 #define NR_CPUS 1
 int userspace_pid[NR_CPUS];
 
-void start_userspace(int cpu)
+int start_userspace(unsigned long stub_stack)
 {
 	void *stack;
 	unsigned long sp;
-	int pid, status, n;
+	int pid, status, n, flags;
 
 	stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
 		     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
@@ -117,8 +204,9 @@ void start_userspace(int cpu)
 		panic("start_userspace : mmap failed, errno = %d", errno);
 	sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
 
-	pid = clone(userspace_tramp, (void *) sp, 
-		    CLONE_FILES | CLONE_VM | SIGCHLD, NULL);
+	flags = CLONE_FILES | SIGCHLD;
+	if(proc_mm) flags |= CLONE_VM;
+	pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack);
 	if(pid < 0)
 		panic("start_userspace : clone failed, errno = %d", errno);
 
@@ -140,7 +228,7 @@ void start_userspace(int cpu)
 	if(munmap(stack, PAGE_SIZE) < 0)
 		panic("start_userspace : munmap failed, errno = %d\n", errno);
 
-	userspace_pid[cpu] = pid;
+	return(pid);
 }
 
 void userspace(union uml_pt_regs *regs)
@@ -174,7 +262,9 @@ void userspace(union uml_pt_regs *regs)
 		if(WIFSTOPPED(status)){
 		  	switch(WSTOPSIG(status)){
 			case SIGSEGV:
-                                handle_segv(pid, regs);
+                                if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo)
+                                        user_signal(SIGSEGV, regs, pid);
+                                else handle_segv(pid, regs);
 				break;
 			case SIGTRAP + 0x80:
 			        handle_trap(pid, regs, local_using_sysemu);
@@ -194,6 +284,7 @@ void userspace(union uml_pt_regs *regs)
 			        printk("userspace - child stopped with signal "
 				       "%d\n", WSTOPSIG(status));
 			}
+			pid = userspace_pid[0];
 			interrupt_end();
 
 			/* Avoid -ERESTARTSYS handling in host */
@@ -207,6 +298,67 @@ void userspace(union uml_pt_regs *regs)
 #define INIT_JMP_HALT 3
 #define INIT_JMP_REBOOT 4
 
+
+int copy_context_skas0(unsigned long new_stack, int pid)
+{
+	int err;
+	unsigned long regs[MAX_REG_NR];
+	unsigned long current_stack = current_stub_stack();
+	struct stub_data *data = (struct stub_data *) current_stack;
+	struct stub_data *child_data = (struct stub_data *) new_stack;
+	__u64 new_offset;
+	int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset);
+
+	/* prepare offset and fd of child's stack as argument for parent's
+	 * and child's mmap2 calls
+	 */
+	*data = ((struct stub_data) { .offset	= MMAP_OFFSET(new_offset),
+				      .fd	= new_fd,
+				      .timer	= ((struct itimerval)
+					           { { 0, 1000000 / hz() },
+						     { 0, 1000000 / hz() }})});
+	get_safe_registers(regs);
+
+	/* Set parent's instruction pointer to start of clone-stub */
+	regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE +
+				(unsigned long) stub_clone_handler -
+				(unsigned long) &__syscall_stub_start;
+	regs[REGS_SP_INDEX] = UML_CONFIG_STUB_DATA + PAGE_SIZE -
+		sizeof(void *);
+	err = ptrace_setregs(pid, regs);
+	if(err < 0)
+		panic("copy_context_skas0 : PTRACE_SETREGS failed, "
+		      "pid = %d, errno = %d\n", pid, errno);
+
+	/* set a well known return code for detection of child write failure */
+	child_data->err = 12345678;
+
+	/* Wait, until parent has finished its work: read child's pid from
+	 * parent's stack, and check, if bad result.
+	 */
+	wait_stub_done(pid, 0, "copy_context_skas0");
+
+	pid = data->err;
+	if(pid < 0)
+		panic("copy_context_skas0 - stub-parent reports error %d\n",
+		      pid);
+
+	/* Wait, until child has finished too: read child's result from
+	 * child's stack and check it.
+	 */
+	wait_stub_done(pid, -1, "copy_context_skas0");
+	if (child_data->err != UML_CONFIG_STUB_DATA)
+		panic("copy_context_skas0 - stub-child reports error %d\n",
+		      child_data->err);
+
+	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,
+		   (void *)PTRACE_O_TRACESYSGOOD) < 0)
+		panic("copy_context_skas0 : PTRACE_SETOPTIONS failed, "
+		      "errno = %d\n", errno);
+
+	return pid;
+}
+
 void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
 		void (*handler)(int))
 {
@@ -334,21 +486,19 @@ void reboot_skas(void)
 	siglongjmp(initial_jmpbuf, INIT_JMP_REBOOT);
 }
 
-void switch_mm_skas(int mm_fd)
+void switch_mm_skas(struct mm_id *mm_idp)
 {
 	int err;
 
 #warning need cpu pid in switch_mm_skas
-	err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0, mm_fd);
-	if(err)
-		panic("switch_mm_skas - PTRACE_SWITCH_MM failed, errno = %d\n",
-		      errno);
-}
-
-void kill_off_processes_skas(void)
-{
-#warning need to loop over userspace_pids in kill_off_processes_skas
-	os_kill_ptraced_process(userspace_pid[0], 1);
+	if(proc_mm){
+		err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0,
+			     mm_idp->u.mm_fd);
+		if(err)
+			panic("switch_mm_skas - PTRACE_SWITCH_MM failed, "
+			      "errno = %d\n", errno);
+	}
+	else userspace_pid[0] = mm_idp->u.pid;
 }
 
 /*

arch/um/kernel/skas/process_kern.c

@@ -175,9 +175,12 @@ static int start_kernel_proc(void *unused)
 	return(0);
 }
 
+extern int userspace_pid[];
+
 int start_uml_skas(void)
 {
-	start_userspace(0);
+	if(proc_mm)
+		userspace_pid[0] = start_userspace(0);
 
 	init_new_thread_signals(1);
 
@@ -199,3 +202,31 @@ int thread_pid_skas(struct task_struct *task)
 #warning Need to look up userspace_pid by cpu
 	return(userspace_pid[0]);
 }
+
+void kill_off_processes_skas(void)
+{
+	if(proc_mm)
+#warning need to loop over userspace_pids in kill_off_processes_skas
+		os_kill_ptraced_process(userspace_pid[0], 1);
+	else {
+		struct task_struct *p;
+		int pid, me;
+
+		me = os_getpid();
+		for_each_process(p){
+			if(p->mm == NULL)
+				continue;
+
+			pid = p->mm->context.skas.id.u.pid;
+			os_kill_ptraced_process(pid, 1);
+		}
+	}
+}
+
+unsigned long current_stub_stack(void)
+{
+	if(current->mm == NULL)
+		return(0);
+
+	return(current->mm->context.skas.id.stack);
+}

arch/um/kernel/skas/tlb.c

@@ -6,6 +6,7 @@
 
 #include "linux/stddef.h"
 #include "linux/sched.h"
+#include "linux/config.h"
 #include "linux/mm.h"
 #include "asm/page.h"
 #include "asm/pgtable.h"
@@ -17,7 +18,7 @@
 #include "os.h"
 #include "tlb.h"
 
-static void do_ops(int fd, struct host_vm_op *ops, int last)
+static void do_ops(union mm_context *mmu, struct host_vm_op *ops, int last)
 {
 	struct host_vm_op *op;
 	int i;
@@ -26,18 +27,18 @@ static void do_ops(int fd, struct host_vm_op *ops, int last)
 		op = &ops[i];
 		switch(op->type){
 		case MMAP:
-			map(fd, op->u.mmap.addr, op->u.mmap.len,
+                        map(&mmu->skas.id, op->u.mmap.addr, op->u.mmap.len,
 			    op->u.mmap.r, op->u.mmap.w, op->u.mmap.x,
 			    op->u.mmap.fd, op->u.mmap.offset);
 			break;
 		case MUNMAP:
-			unmap(fd, (void *) op->u.munmap.addr,
+                        unmap(&mmu->skas.id, (void *) op->u.munmap.addr,
 			      op->u.munmap.len);
 			break;
 		case MPROTECT:
-			protect(fd, op->u.mprotect.addr, op->u.mprotect.len,
-				op->u.mprotect.r, op->u.mprotect.w,
-				op->u.mprotect.x);
+                        protect(&mmu->skas.id, op->u.mprotect.addr,
+                                op->u.mprotect.len, op->u.mprotect.r,
+                                op->u.mprotect.w, op->u.mprotect.x);
 			break;
 		default:
 			printk("Unknown op type %d in do_ops\n", op->type);
@@ -46,12 +47,15 @@ static void do_ops(int fd, struct host_vm_op *ops, int last)
 	}
 }
 
+extern int proc_mm;
+
 static void fix_range(struct mm_struct *mm, unsigned long start_addr,
 		      unsigned long end_addr, int force)
 {
-        int fd = mm->context.skas.mm_fd;
+        if(!proc_mm && (end_addr > CONFIG_STUB_START))
+                end_addr = CONFIG_STUB_START;
 
-        fix_range_common(mm, start_addr, end_addr, force, fd, do_ops);
+        fix_range_common(mm, start_addr, end_addr, force, do_ops);
 }
 
 void __flush_tlb_one_skas(unsigned long addr)
@@ -69,17 +73,20 @@ void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start,
 
 void flush_tlb_mm_skas(struct mm_struct *mm)
 {
+	unsigned long end;
+
 	/* Don't bother flushing if this address space is about to be
          * destroyed.
          */
         if(atomic_read(&mm->mm_users) == 0)
                 return;
 
-        fix_range(mm, 0, host_task_size, 0);
-        flush_tlb_kernel_range_common(start_vm, end_vm);
+	end = proc_mm ? task_size : CONFIG_STUB_START;
+        fix_range(mm, 0, end, 0);
 }
 
 void force_flush_all_skas(void)
 {
-        fix_range(current->mm, 0, host_task_size, 1);
+	unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
+        fix_range(current->mm, 0, end, 1);
 }

arch/um/kernel/time.c

@@ -48,6 +48,13 @@ void enable_timer(void)
 	set_interval(ITIMER_VIRTUAL);
 }
 
+void prepare_timer(void * ptr)
+{
+	int usec = 1000000/hz();
+	*(struct itimerval *)ptr = ((struct itimerval) { { 0, usec },
+							 { 0, usec }});
+}
+
 void disable_timer(void)
 {
 	struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});

arch/um/kernel/tlb.c

@@ -18,13 +18,15 @@
 #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
 
 void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
-                      unsigned long end_addr, int force, int data,
-                      void (*do_ops)(int, struct host_vm_op *, int))
+                      unsigned long end_addr, int force,
+                      void (*do_ops)(union mm_context *, struct host_vm_op *,
+                                     int))
 {
         pgd_t *npgd;
         pud_t *npud;
         pmd_t *npmd;
         pte_t *npte;
+        union mm_context *mmu = &mm->context;
         unsigned long addr, end;
         int r, w, x;
         struct host_vm_op ops[16];
@@ -40,7 +42,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                                 end = end_addr;
                         if(force || pgd_newpage(*npgd)){
                                 op_index = add_munmap(addr, end - addr, ops,
-                                                      op_index, last_op, data,
+                                                      op_index, last_op, mmu,
                                                       do_ops);
                                 pgd_mkuptodate(*npgd);
                         }
@@ -55,7 +57,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                                 end = end_addr;
                         if(force || pud_newpage(*npud)){
                                 op_index = add_munmap(addr, end - addr, ops,
-                                                      op_index, last_op, data,
+                                                      op_index, last_op, mmu,
                                                       do_ops);
                                 pud_mkuptodate(*npud);
                         }
@@ -70,7 +72,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                                 end = end_addr;
                         if(force || pmd_newpage(*npmd)){
                                 op_index = add_munmap(addr, end - addr, ops,
-                                                      op_index, last_op, data,
+                                                      op_index, last_op, mmu,
                                                       do_ops);
                                 pmd_mkuptodate(*npmd);
                         }
@@ -93,21 +95,21 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                                 op_index = add_mmap(addr,
                                                     pte_val(*npte) & PAGE_MASK,
                                                     PAGE_SIZE, r, w, x, ops,
-                                                    op_index, last_op, data,
+                                                    op_index, last_op, mmu,
                                                     do_ops);
                         else op_index = add_munmap(addr, PAGE_SIZE, ops,
-                                                   op_index, last_op, data,
+                                                   op_index, last_op, mmu,
                                                    do_ops);
                 }
                 else if(pte_newprot(*npte))
                         op_index = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
-                                                op_index, last_op, data,
+                                                op_index, last_op, mmu,
                                                 do_ops);
 
                 *npte = pte_mkuptodate(*npte);
                 addr += PAGE_SIZE;
         }
-        (*do_ops)(data, ops, op_index);
+        (*do_ops)(mmu, ops, op_index);
 }
 
 int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
@@ -195,51 +197,6 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
         return(updated);
 }
 
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
-{
-        address &= PAGE_MASK;
-        flush_tlb_range(vma, address, address + PAGE_SIZE);
-}
-
-void flush_tlb_all(void)
-{
-        flush_tlb_mm(current->mm);
-}
-  
-void flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
-        CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
-                         flush_tlb_kernel_range_common, start, end);
-}
-
-void flush_tlb_kernel_vm(void)
-{
-        CHOOSE_MODE(flush_tlb_kernel_vm_tt(),
-                    flush_tlb_kernel_range_common(start_vm, end_vm));
-}
-
-void __flush_tlb_one(unsigned long addr)
-{
-        CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
-}
-
-void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 
-     unsigned long end)
-{
-        CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
-                         end);
-}
-
-void flush_tlb_mm(struct mm_struct *mm)
-{
-        CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
-}
-
-void force_flush_all(void)
-{
-        CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());
-}
-
 pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
 {
         return(pgd_offset(mm, address));
@@ -270,9 +227,9 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr)
 }
 
 int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
-     int r, int w, int x, struct host_vm_op *ops, int index,
-     int last_filled, int data,
-     void (*do_ops)(int, struct host_vm_op *, int))
+             int r, int w, int x, struct host_vm_op *ops, int index,
+             int last_filled, union mm_context *mmu,
+             void (*do_ops)(union mm_context *, struct host_vm_op *, int))
 {
         __u64 offset;
 	struct host_vm_op *last;
@@ -292,7 +249,7 @@ int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
 	}
 
 	if(index == last_filled){
-		(*do_ops)(data, ops, last_filled);
+		(*do_ops)(mmu, ops, last_filled);
 		index = -1;
 	}
 
@@ -310,8 +267,8 @@ int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
 }
 
 int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
-	       int index, int last_filled, int data,
-	       void (*do_ops)(int, struct host_vm_op *, int))
+	       int index, int last_filled, union mm_context *mmu,
+	       void (*do_ops)(union mm_context *, struct host_vm_op *, int))
 {
 	struct host_vm_op *last;
 
@@ -325,7 +282,7 @@ int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
 	}
 
 	if(index == last_filled){
-		(*do_ops)(data, ops, last_filled);
+		(*do_ops)(mmu, ops, last_filled);
 		index = -1;
 	}
 
@@ -337,8 +294,9 @@ int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
 }
 
 int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x,
-		 struct host_vm_op *ops, int index, int last_filled, int data,
-		 void (*do_ops)(int, struct host_vm_op *, int))
+                 struct host_vm_op *ops, int index, int last_filled,
+                 union mm_context *mmu,
+                 void (*do_ops)(union mm_context *, struct host_vm_op *, int))
 {
 	struct host_vm_op *last;
 
@@ -354,7 +312,7 @@ int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x,
 	}
 
 	if(index == last_filled){
-		(*do_ops)(data, ops, last_filled);
+		(*do_ops)(mmu, ops, last_filled);
 		index = -1;
 	}
 
@@ -367,3 +325,49 @@ int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x,
 						      .x	= x } } });
 	return(index);
 }
+
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
+{
+        address &= PAGE_MASK;
+        flush_tlb_range(vma, address, address + PAGE_SIZE);
+}
+
+void flush_tlb_all(void)
+{
+        flush_tlb_mm(current->mm);
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+        CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
+                         flush_tlb_kernel_range_common, start, end);
+}
+
+void flush_tlb_kernel_vm(void)
+{
+        CHOOSE_MODE(flush_tlb_kernel_vm_tt(),
+                    flush_tlb_kernel_range_common(start_vm, end_vm));
+}
+
+void __flush_tlb_one(unsigned long addr)
+{
+        CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
+}
+
+void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+		     unsigned long end)
+{
+        CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
+                         end);
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+        CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
+}
+
+void force_flush_all(void)
+{
+        CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());
+}
+

arch/um/kernel/tt/tlb.c

@@ -17,7 +17,7 @@
 #include "os.h"
 #include "tlb.h"
 
-static void do_ops(int unused, struct host_vm_op *ops, int last)
+static void do_ops(union mm_context *mmu, struct host_vm_op *ops, int last)
 {
 	struct host_vm_op *op;
 	int i;
@@ -55,7 +55,7 @@ static void fix_range(struct mm_struct *mm, unsigned long start_addr,
                 panic("fix_range fixing wrong address space, current = 0x%p",
                       current);
 
-        fix_range_common(mm, start_addr, end_addr, force, 0, do_ops);
+        fix_range_common(mm, start_addr, end_addr, force, do_ops);
 }
 
 atomic_t vmchange_seq = ATOMIC_INIT(1);

arch/um/os-Linux/sys-i386/registers.c

@@ -121,6 +121,11 @@ void init_registers(int pid)
 		      err);
 }
 
+void get_safe_registers(unsigned long *regs)
+{
+	memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
+}
+
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * Emacs will notice this stuff at the end of the file and automatically

arch/x86_64/kernel/suspend.c

@@ -119,6 +119,7 @@ void __restore_processor_state(struct saved_context *ctxt)
 	fix_processor_context();
 
 	do_fpu_end();
+	mtrr_ap_init();
 }
 
 void restore_processor_state(void)