- 12 Oct, 2012 2 commits
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Konrad Rzeszutek Wilk authored
We actually do not do anything about it. Just return a default value of zero and if the kernel tries to write anything but 0 we BUG_ON. This fixes the case when an user tries to suspend the machine and it blows up in save_processor_state b/c 'read_cr8' is set to NULL and we get: kernel BUG at /home/konrad/ssd/linux/arch/x86/include/asm/paravirt.h:100! invalid opcode: 0000 [#1] SMP Pid: 2687, comm: init.late Tainted: G O 3.6.0upstream-00002-gac264ac-dirty #4 Bochs Bochs RIP: e030:[<ffffffff814d5f42>] [<ffffffff814d5f42>] save_processor_state+0x212/0x270 .. snip.. Call Trace: [<ffffffff810733bf>] do_suspend_lowlevel+0xf/0xac [<ffffffff8107330c>] ? x86_acpi_suspend_lowlevel+0x10c/0x150 [<ffffffff81342ee2>] acpi_suspend_enter+0x57/0xd5 CC: stable@vger.kernel.org Signed-off-by:Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Konrad Rzeszutek Wilk authored
The hypervisor will trap it. However without this patch, we would crash as the .read_tscp is set to NULL. This patch fixes it and sets it to the native_read_tscp call. CC: stable@vger.kernel.org Signed-off-by:
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- 04 Oct, 2012 2 commits
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Olaf Hering authored
Register pfn_is_ram helper speed up reading /proc/vmcore in the kdump kernel. See commit message of 997c136f ("fs/proc/vmcore.c: add hook to read_from_oldmem() to check for non-ram pages") for details. It makes use of a new hvmop HVMOP_get_mem_type which was introduced in xen 4.2 (23298:26413986e6e0) and backported to 4.1.1. The new function is currently only enabled for reading /proc/vmcore. Later it will be used also for the kexec kernel. Since that requires more changes in the generic kernel make it static for the time being. Signed-off-by:
Olaf Hering <olaf@aepfle.de> Signed-off-by:
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David Vrabel authored
Backend drivers shouldn't transistion to CLOSED unless the frontend is CLOSED. If a backend does transition to CLOSED too soon then the frontend may not see the CLOSING state and will not properly shutdown. So, treat an unexpected backend CLOSED state the same as CLOSING. Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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- 03 Oct, 2012 1 commit
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Stefano Stabellini authored
Since commit commit 4c071ee5 ("arm: initial Xen support") PV on HVM guests can be xen_initial_domain. However PV on HVM guests might have an unitialized xen_start_info, so check before accessing its fields. Signed-off-by:
Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by:
Ian Campbell <Ian.Campbell@citrix.com> Reported-by:
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- 02 Oct, 2012 2 commits
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Stefano Stabellini authored
xen_init_IRQ should be marked __init because it calls other functions marked __init and is always called by functions marked __init (on both x86 and arm). Also remove the unused EXPORT_SYMBOL_GPL(xen_init_IRQ). Both changes were introduced by "xen/arm: receive Xen events on ARM". Signed-off-by:
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Stefano Stabellini authored
We need to add $(dom0-y) to obj-$(CONFIG_XEN_DOM0) after dom0-y is defined otherwise we end up adding nothing. Signed-off-by:
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- 26 Sep, 2012 1 commit
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Konrad Rzeszutek Wilk authored
Merge branch 'xenarm-for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm into stable/for-linus-3.7 * 'xenarm-for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm: arm: introduce a DTS for Xen unprivileged virtual machines MAINTAINERS: add myself as Xen ARM maintainer xen/arm: compile netback xen/arm: compile blkfront and blkback xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree xen/arm: receive Xen events on ARM xen/arm: initialize grant_table on ARM xen/arm: get privilege status xen/arm: introduce CONFIG_XEN on ARM xen: do not compile manage, balloon, pci, acpi, pcpu and cpu_hotplug on ARM xen/arm: Introduce xen_ulong_t for unsigned long xen/arm: Xen detection and shared_info page mapping docs: Xen ARM DT bindings xen/arm: empty implementation of grant_table arch specific functions xen/arm: sync_bitops xen/arm: page.h definitions xen/arm: hypercalls arm: initial Xen support Signed-off-by:
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- 25 Sep, 2012 2 commits
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Konrad Rzeszutek Wilk authored
When we do an FLR, or D0->D3_hot we may lose the BARs as the device has turned itself off (and on). This means the device cannot function unless the pci_restore_state is called - which it is when the PCI device is unbound from the Xen PCI backend driver. For PV guests it ends up calling pci_enable_device / pci_enable_msi[x] which does the proper steps That however is not happening if a HVM guest is run as QEMU deals with PCI configuration space. QEMU also requires that the device be "parked" under the ownership of a pci-stub driver to guarantee that the PCI device is not being used. Hence we follow the same incantation as pci_reset_function does - by doing an FLR, then restoring the PCI configuration space. The result of this patch is that when you run lspci, you get now this: - Region 0: [virtual] Memory at fe8c0000 (32-bit, non-prefetchable) [size=128K] - Region 1: [virtual] Memory at fe800000 (32-bit, non-prefetchable) [size=512K] + Region 0: Memory at fe8c0000 (32-bit, non-prefetchable) [size=128K] + Region 1: Memory at fe800000 (32-bit, non-prefetchable) [size=512K] Region 2: I/O ports at c000 [size=32] - Region 3: [virtual] Memory at fe8e0000 (32-bit, non-prefetchable) [size=16K] + Region 3: Memory at fe8e0000 (32-bit, non-prefetchable) [size=16K] The [virtual] means that lspci read those entries from SysFS but when it read them from the device it got a different value (0xfffffff). CC: stable@vger.kernel.org #only for 3.5, 3.6 Signed-off-by: -
Jan Beulich authored
As the function calls pcistub_device_get() before returning non-NULL, its callers need to take care of calling pcistub_device_put() on (mostly, but not exclusively) error paths. Otoh, the function already guarantees that the 'dev' member is non-NULL upon successful return, so callers do not need to check for this a second time. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Signed-off-by:
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- 24 Sep, 2012 3 commits
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Stefano Stabellini authored
Given that the xenvm machine is based on vexpress but with an extremely limited selection of peripherals (the guest is supposed to use virtual devices instead), add "xen,xenvm" to the list of compatible machines in mach-vexpress. Changes in v3: - add comments to mark fields that are likely to be changed by the hypervisor. Changes in v2: - remove include skeleton; - use #address-cells = <2> and #size-cells = <2>; - remove the debug bootargs; - use memory@80000000 instead of memory; - remove the ranges and interrupt-map from the motherboard node; - set the machine compatible to "xen,xenvm-4.2", "xen,xenvm"; - rename the dts file to xenvm-4.2.dts; - add "xen,xenvm" to the list of compatible DT strings to mach-vexpress. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by: Pawel Moll <pawel.moll@arm.com> (v2m changes)
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Jan Beulich authored
In order to add xen EFI frambebuffer video support, it is required to add xen-efi's new video type (XEN_VGATYPE_EFI_LFB) case and handle it in the function xen_init_vga and set the video type to VIDEO_TYPE_EFI to enable efi video mode. The original patch from which this was broken out from: http://marc.info/?i=4E099AA6020000780004A4C6@nat28.tlf.novell.comSigned-off-by:
Jan Beulich <JBeulich@novell.com> Signed-off-by:
Tang Liang <liang.tang@oracle.com> [v2: The original author is Jan Beulich and Liang Tang ported it to upstream] Signed-off-by:
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Konrad Rzeszutek Wilk authored
The xen c/s 25873 allows the hypervisor to retrieve the NUMLOCK flag. With this patch, the Linux kernel can get the state according to the data in the BIOS. Acked-by:
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- 23 Sep, 2012 1 commit
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Konrad Rzeszutek Wilk authored
* stable/late-swiotlb.v3.3: xen/swiotlb: Fix compile warnings when using plain integer instead of NULL pointer. xen/swiotlb: Remove functions not needed anymore. xen/pcifront: Use Xen-SWIOTLB when initting if required. xen/swiotlb: For early initialization, return zero on success. xen/swiotlb: Use the swiotlb_late_init_with_tbl to init Xen-SWIOTLB late when PV PCI is used. xen/swiotlb: Move the error strings to its own function. xen/swiotlb: Move the nr_tbl determination in its own function. swiotlb: add the late swiotlb initialization function with iotlb memory xen/swiotlb: With more than 4GB on 64-bit, disable the native SWIOTLB. xen/swiotlb: Simplify the logic. Conflicts: arch/x86/xen/pci-swiotlb-xen.c Signed-off-by:
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- 21 Sep, 2012 1 commit
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Andres Lagar-Cavilla authored
Since Xen-4.2, hvm domains may have portions of their memory paged out. When a foreign domain (such as dom0) attempts to map these frames, the map will initially fail. The hypervisor returns a suitable errno, and kicks an asynchronous page-in operation carried out by a helper. The foreign domain is expected to retry the mapping operation until it eventually succeeds. The foreign domain is not put to sleep because itself could be the one running the pager assist (typical scenario for dom0). This patch adds support for this mechanism for backend drivers using grant mapping and copying operations. Specifically, this covers the blkback and gntdev drivers (which map foreign grants), and the netback driver (which copies foreign grants). * Add a retry method for grants that fail with GNTST_eagain (i.e. because the target foreign frame is paged out). * Insert hooks with appropriate wrappers in the aforementioned drivers. The retry loop is only invoked if the grant operation status is GNTST_eagain. It guarantees to leave a new status code different from GNTST_eagain. Any other status code results in identical code execution as before. The retry loop performs 256 attempts with increasing time intervals through a 32 second period. It uses msleep to yield while waiting for the next retry. V2 after feedback from David Vrabel: * Explicit MAX_DELAY instead of wrap-around delay into zero * Abstract GNTST_eagain check into core grant table code for netback module. V3 after feedback from Ian Campbell: * Add placeholder in array of grant table error descriptions for unrelated error code we jump over. * Eliminate single map and retry macro in favor of a generic batch flavor. * Some renaming. * Bury most implementation in grant_table.c, cleaner interface. V4 rebased on top of sync of Xen grant table interface headers. Signed-off-by:
Andres Lagar-Cavilla <andres@lagarcavilla.org> Acked-by:
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- 18 Sep, 2012 1 commit
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Jan Beulich authored
Particularly for hiding sets of SR-IOV devices, specifying them all individually is rather cumbersome. Therefore, allow function and slot numbers to be replaced by a wildcard character ('*'). Unfortunately this gets complicated by the in-kernel sscanf() implementation not being really standard conformant - matching of plain text tails cannot be checked by the caller (a patch to overcome this will be sent shortly, and a follow-up patch for simplifying the code is planned to be sent when that fixed went upstream). Signed-off-by:
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- 17 Sep, 2012 8 commits
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Konrad Rzeszutek Wilk authored
arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer Acked-by:
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Konrad Rzeszutek Wilk authored
Sparse warns us off: drivers/xen/swiotlb-xen.c:506:1: warning: symbol 'xen_swiotlb_map_sg' was not declared. Should it be static? drivers/xen/swiotlb-xen.c:534:1: warning: symbol 'xen_swiotlb_unmap_sg' was not declared. Should it be static? and it looks like we do not need this function at all. Acked-by:
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Konrad Rzeszutek Wilk authored
We piggyback on "xen/swiotlb: Use the swiotlb_late_init_with_tbl to init Xen-SWIOTLB late when PV PCI is used." functionality to start up the Xen-SWIOTLB if we are hot-plugged. This allows us to bypass the need to supply 'iommu=soft' on the Linux command line (mostly). With this patch, if a user forgot 'iommu=soft' on the command line, and hotplug a PCI device they will get: pcifront pci-0: Installing PCI frontend Warning: only able to allocate 4 MB for software IO TLB software IO TLB [mem 0x2a000000-0x2a3fffff] (4MB) mapped at [ffff88002a000000-ffff88002a3fffff] pcifront pci-0: Creating PCI Frontend Bus 0000:00 pcifront pci-0: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [io 0x0000-0xffff] pci_bus 0000:00: root bus resource [mem 0x00000000-0xfffffffff] pci 0000:00:00.0: [8086:10d3] type 00 class 0x020000 pci 0000:00:00.0: reg 10: [mem 0xfe5c0000-0xfe5dffff] pci 0000:00:00.0: reg 14: [mem 0xfe500000-0xfe57ffff] pci 0000:00:00.0: reg 18: [io 0xe000-0xe01f] pci 0000:00:00.0: reg 1c: [mem 0xfe5e0000-0xfe5e3fff] pcifront pci-0: claiming resource 0000:00:00.0/0 pcifront pci-0: claiming resource 0000:00:00.0/1 pcifront pci-0: claiming resource 0000:00:00.0/2 pcifront pci-0: claiming resource 0000:00:00.0/3 e1000e: Intel(R) PRO/1000 Network Driver - 2.0.0-k e1000e: Copyright(c) 1999 - 2012 Intel Corporation. e1000e 0000:00:00.0: Disabling ASPM L0s L1 e1000e 0000:00:00.0: enabling device (0000 -> 0002) e1000e 0000:00:00.0: Xen PCI mapped GSI16 to IRQ34 e1000e 0000:00:00.0: (unregistered net_device): Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode e1000e 0000:00:00.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:1b:21:ab:c6:13 e1000e 0000:00:00.0: eth0: Intel(R) PRO/1000 Network Connection e1000e 0000:00:00.0: eth0: MAC: 3, PHY: 8, PBA No: E46981-005 The "Warning only" will go away if one supplies 'iommu=soft' instead as we have a higher chance of being able to allocate large swaths of memory. Acked-by:
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Konrad Rzeszutek Wilk authored
If everything is setup properly we would return -ENOMEM since rc by default is set to that value. Lets not do that and return a proper return code. Note: The reason the early code needs this special treatment is that it SWIOTLB library call does not return anything (and had it failed it would call panic()) - but our function does. Acked-by:
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Konrad Rzeszutek Wilk authored
With this patch we provide the functionality to initialize the Xen-SWIOTLB late in the bootup cycle - specifically for Xen PCI-frontend. We still will work if the user had supplied 'iommu=soft' on the Linux command line. Note: We cannot depend on after_bootmem to automatically determine whether this is early or not. This is because when PCI IOMMUs are initialized it is after after_bootmem but before a lot of "other" subsystems are initialized. CC: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> [v1: Fix smatch warnings] [v2: Added check for xen_swiotlb] [v3: Rebased with new xen-swiotlb changes] [v4: squashed xen/swiotlb: Depending on after_bootmem is not correct in] Reviewed-by:
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Konrad Rzeszutek Wilk authored
That way we can more easily reuse those errors when using the late SWIOTLB init. Acked-by:
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Konrad Rzeszutek Wilk authored
Moving the function out of the way to prepare for the late SWIOTLB init. Acked-by:
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Stefano Stabellini authored
bind_evtchn_to_irqhandler can legitimately return 0 (irq 0): it is not an error. If Linux is running as an HVM domain and is running as Dom0, use xenstored_local_init to initialize the xenstore page and event channel. Changes in v4: - do not xs_reset_watches on dom0. Changes in v2: - refactor xenbus_init. Signed-off-by:
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- 14 Sep, 2012 2 commits
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Stefano Stabellini authored
Signed-off-by:
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Ian Campbell authored
Adds GNTST_address_too_big and GNTST_eagain. Signed-off-by:
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- 12 Sep, 2012 7 commits
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Konrad Rzeszutek Wilk authored
* stable/128gb.v5.1: xen/mmu: If the revector fails, don't attempt to revector anything else. xen/p2m: When revectoring deal with holes in the P2M array. xen/mmu: Release just the MFN list, not MFN list and part of pagetables. xen/mmu: Remove from __ka space PMD entries for pagetables. xen/mmu: Copy and revector the P2M tree. xen/p2m: Add logic to revector a P2M tree to use __va leafs. xen/mmu: Recycle the Xen provided L4, L3, and L2 pages xen/mmu: For 64-bit do not call xen_map_identity_early xen/mmu: use copy_page instead of memcpy. xen/mmu: Provide comments describing the _ka and _va aliasing issue xen/mmu: The xen_setup_kernel_pagetable doesn't need to return anything. Revert "xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain." and "xen/x86: Use memblock_reserve for sensitive areas." xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain. xen/x86: Use memblock_reserve for sensitive areas. xen/p2m: Fix the comment describing the P2M tree. Conflicts: arch/x86/xen/mmu.c The pagetable_init is the old xen_pagetable_setup_done and xen_pagetable_setup_start rolled in one. Signed-off-by: -
Konrad Rzeszutek Wilk authored
Merge branch 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into stable/for-linus-3.7 * 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (9690 commits) x86: Document x86_init.paging.pagetable_init() x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done() x86: Move paging_init() call to x86_init.paging.pagetable_init() x86: Rename pagetable_setup_start() to pagetable_init() x86: Remove base argument from x86_init.paging.pagetable_setup_start Linux 3.6-rc5 HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured Remove user-triggerable BUG from mpol_to_str xen/pciback: Fix proper FLR steps. uml: fix compile error in deliver_alarm() dj: memory scribble in logi_dj Fix order of arguments to compat_put_time[spec|val] xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory. powerpc: Don't use __put_user() in patch_instruction powerpc: Make sure IPI handlers see data written by IPI senders powerpc: Restore correct DSCR in context switch powerpc: Fix DSCR inheritance in copy_thread() powerpc: Keep thread.dscr and thread.dscr_inherit in sync ...
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Attilio Rao authored
Signed-off-by:
Attilio Rao <attilio.rao@citrix.com> Acked-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-6-git-send-email-attilio.rao@citrix.comSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Attilio Rao authored
At this stage x86_init.paging.pagetable_setup_done is only used in the XEN case. Move its content in the x86_init.paging.pagetable_init setup function and remove the now unused x86_init.paging.pagetable_setup_done remaining infrastructure. Signed-off-by:
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Attilio Rao authored
Move the paging_init() call to the platform specific pagetable_init() function, so we can get rid of the extra pagetable_setup_done() function pointer. Signed-off-by:
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Attilio Rao authored
In preparation for unifying the pagetable_setup_start() and pagetable_setup_done() setup functions, rename appropriately all the infrastructure related to pagetable_setup_start(). Signed-off-by:
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Attilio Rao authored
We either use swapper_pg_dir or the argument is unused. Preparatory patch to simplify platform pagetable setup further. Signed-off-by:
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- 10 Sep, 2012 1 commit
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Dan Carpenter authored
__copy_to_user() returns the number of bytes remaining to be copied but we want to return a negative error code here. Acked-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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- 08 Sep, 2012 3 commits
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Linus Torvalds authored
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git://git.linaro.org/people/mszyprowski/linux-dma-mappingLinus Torvalds authored
Pull DMA-mapping fixes from Marek Szyprowski: "Another set of fixes for ARM dma-mapping subsystem. Commit e9da6e99 replaced custom consistent buffer remapping code with generic vmalloc areas. It however introduced some regressions caused by limited support for allocations in atomic context. This series contains fixes for those regressions. For some subplatforms the default, pre-allocated pool for atomic allocations turned out to be too small, so a function for setting its size has been added. Another set of patches adds support for atomic allocations to IOMMU-aware DMA-mapping implementation. The last part of this pull request contains two fixes for Contiguous Memory Allocator, which relax too strict requirements." * 'fixes-for-3.6' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages() ARM: dma-mapping: Refactor out to introduce __in_atomic_pool ARM: dma-mapping: atomic_pool with struct page **pages ARM: Kirkwood: increase atomic coherent pool size ARM: DMA-Mapping: print warning when atomic coherent allocation fails ARM: DMA-Mapping: add function for setting coherent pool size from platform code ARM: relax conditions required for enabling Contiguous Memory Allocator mm: cma: fix alignment requirements for contiguous regions
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input subsystem updates from Dmitry Torokhov. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: wacom - add support for EMR on Cintiq 24HD touch Input: i8042 - add Gigabyte T1005 series netbooks to noloop table Input: imx_keypad - reset the hardware before enabling Input: edt-ft5x06 - fix build error when compiling wthout CONFIG_DEBUG_FS
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- 07 Sep, 2012 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID updates from Jiri Kosina: "It contains a fix for Eaton Ellipse MAX UPS from Alan Stern, performance improvement (not processing debug data if noone is interested), by Henrik Rydberg, and allowing tpkbd-driven devices to work even with generic driver in a crippled mode, by Andres Freund." * 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured HID: Only dump input if someone is listening HID: add NOGET quirk for Eaton Ellipse MAX UPS
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Andres Freund authored
c1dcad2d added a new driver configured by HID_LENOVO_TPKBD but made the hid_have_special_driver entry non-optional which lead to a recognized but non-working device if the new driver wasn't configured (which is the correct default). Signed-off-by:
Andres Freund <andres@anarazel.de> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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Linus Torvalds authored
Merge tag 'stable/for-linus-3.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen bug-fixes from Konrad Rzeszutek Wilk: * Fix for TLB flushing introduced in v3.6 * Fix Xen-SWIOTLB not using proper DMA mask - device had 64bit but in a 32-bit kernel we need to allocate for coherent pages from a 32-bit pool. * When trying to re-use P2M nodes we had a one-off error and triggered a BUG_ON check with specific CONFIG_ option. * When doing FLR in Xen-PCI-backend we would first do FLR then save the PCI configuration space. We needed to do it the other way around. * tag 'stable/for-linus-3.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pciback: Fix proper FLR steps. xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory.
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