- 28 Mar, 2017 4 commits
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Michael Holzheu authored
Since linux v3.14 with commit 38dfac84 ("vmcore: prevent PT_NOTE p_memsz overflow during header update") on s390 we get the following message in the kdump kernel: Warning: Exceeded p_memsz, dropping PT_NOTE entry n_namesz=0x6b6b6b6b, n_descsz=0x6b6b6b6b The reason for this is that we don't create a final zero note in the ELF header which the proc/vmcore code uses to find out the end of the notes section (see also kernel/kexec_core.c:final_note()). It still worked on s390 by chance because we (most of the time?) have the byte pattern 0x6b6b6b6b after the notes section which also makes the notes parsing code stop in update_note_header_size_elf64() because 0x6b6b6b6b is interpreded as note size: if ((real_sz + sz) > max_sz) { pr_warn("Warning: Exceeded p_memsz, dropping P ...); break; } So fix this and add the missing final note to the ELF header. We don't have to adjust the memory size for ELF header ("alloc_size") because the new ELF note still fits into the 0x1000 base memory. Cc: stable@vger.kernel.org # v4.4+ Signed-off-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
HAVE_ARCH_EARLY_PFN_TO_NID selects a not present Kconfig option. Therefore remove it. Given that the first call of early_pfn_to_nid() happens after numa_setup() finished to establish the memory to node mapping, there is no need to implement an architecture private version of __early_pfn_to_nid() like (only) ia64 does. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Stefan Haberland authored
On some z/VM systems the query host access command is not supported for temp disks, though the corresponding feature code is set. This does not have any impact beside that the information is not available. Suppress the full blown command reject error messages to not confuse the user. The error is still logged in the s390dbf. Signed-off-by:
Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by:
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Stefan Haberland authored
Some storage servers might not support the query host access feature. Check if the corresponding feature code is set. Signed-off-by:
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- 24 Mar, 2017 1 commit
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Janosch Frank authored
ptep_notify and gmap_shadow_notify both need a guest address and therefore retrieve them from the available virtual host address. As they operate on the same guest address, we can calculate it once and then pass it on. As a gmap normally has more than one shadow gmap, we also do not recalculate for each of them any more. Signed-off-by:
Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by:
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- 22 Mar, 2017 21 commits
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Heiko Carstens authored
There is no need for the __ASSEMBLY__ ifdefery anymore since the architecture level set code that deals with facility bits was converted to C in the meantime. Signed-off-by:
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Heiko Carstens authored
Use the actual size of the facility list array within the lowcore structure for the MAX_FACILITY_BIT define instead of a comment which states what this is good for. This makes it a bit harder to break things. Signed-off-by:
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Heiko Carstens authored
Provide the remaining stsi information via debugfs files. This also might be useful for debugging purposes. Suggested-by:
Christian Borntraeger <borntraeger@de.ibm.com> Acked-by:
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Heiko Carstens authored
Provide the raw stsi 15,1,x data contents via debugfs. This makes it much easier to debug unexpected scheduling domains on machines that provide cpu topology information. Therefore this file adds a new 's390/stsi' debugfs directory with a file for each possible topology nesting level that is allowed by the architecture. The files will be created regardless if the machine supports all, or any, level. If a level is not supported, or no data is available, user space can recognize this with a -EINVAL error code when trying to read such data. In addition a 'topology' symlink is created that points to the file that contains the data that is used to create the scheduling domains. Acked-by:
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Heiko Carstens authored
Introduce a top-level 's390' directory which should be used when adding new s390 specific debug feature files and/or directories. This makes hopefully sure that the contents of the s390 directory will be a bit more structured. Right now we have a couple of top-level files where it is not easy to tell to which subsystem they belong to. Acked-by:
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Harald Freudenberger authored
User space needs some information about the secure key(s) before actually invoking the pkey and/or paes funcionality. This patch introduces a new ioctl API and in kernel API to verify the the secure key blob and give back some information about the key (type, bitsize, old MKVP). Both APIs are described in detail in the header files arch/s390/include/asm/pkey.h and arch/s390/include/uapi/asm/pkey.h. Signed-off-by:
Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by:
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Michael Holzheu authored
Signed-off-by:
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Heiko Carstens authored
If running within a level 3 hypervisor, the hypervisor provides a SYSIB block which contains a control program indentifier string. Use this string instead of the simple KVM and z/VM strings only. In case of z/VM this provides addtional information: the z/VM version. The new string looks similar to this: Hardware name: IBM 2964 N96 702 (z/VM 6.4.0) Signed-off-by:
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Heiko Carstens authored
The arch description provided for the "Hardware name:" contains lots of extra whitespace due to the way the SYSIB contents are defined (strings aren't zero terminated). This looks a bit odd and therefore remove the extra whitespace characters. This also gives the opportunity to add more information, if required, without hitting the magic 80 characters per line limit. Signed-off-by:
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Heiko Carstens authored
Allow compiler warnings again for the sysinfo file. Compiler warnings were disabled when the bogomips calculation with math-emu code was introduced ("[S390] Calibrate delay and bogomips."). Since that code is gone, we can enable warnings again. Signed-off-by: -
Heiko Carstens authored
Use MACHINE_FLAG_TOPOLOGY instead of MACHINE_HAS_TOPOLOGY when clearing the bit that indicates if the machine provides topology information (and if it should be used). Currently works anyway. Fixes: 68cc795d ("s390/topology: make "topology=off" parameter work") Signed-off-by:
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Heiko Carstens authored
Use a single long value instead of a single element array to represent the core mask. The array is a leftover from 32/31 bit code so we were able to use bitops helper functions. Signed-off-by:
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Heiko Carstens authored
The s390 specific little endian bitop macros are gone since a long time. Signed-off-by:
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Michal Hocko authored
__GFP_REPEAT has a rather weak semantic but since it has been introduced around 2.6.12 it has been ignored for low order allocations. page_table_alloc then uses the flag for a single page allocation. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. An earlier attempt to remove the flag 10d58bf2 ("s390: get rid of superfluous __GFP_REPEAT") has missed this one but the situation is very same here. Signed-off-by:
Michal Hocko <mhocko@suse.com> Signed-off-by:
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Heiko Carstens authored
Add a new line to /proc/cpuinfo which shows all available facilities as reported by the stfle instruction: > cat /proc/cpuinfo ... facilities : 0 1 2 3 4 6 7 ... ... Reviewed-by:
Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Same helper function like for_each_set_bit in generic code. Signed-off-by:
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Martin Schwidefsky authored
the KVM tree easier.
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Harald Freudenberger authored
When a secure key with an old Master Key Verification Pattern was given to the pkey_findcard function, there was no responsible card found because only the current MKVP of each card was compared. With this fix also the old MKVP values are considered and so a matching card able to handle the key is reported back to the caller. Signed-off-by:
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Heiko Carstens authored
Commit af51160e ("s390/smp: initialize cpu_present_mask in setup_arch") initializes the cpu_present_mask much earlier than before. However the cpu detection code relies on the fact that iff logical cpu 0 is marked present then also the corresponding physical cpu address within the pcpu_devices array slot is valid. Since commit 44fd2299 ("[PATCH] Register the boot-cpu in the cpu maps earlier") this assumption is not true anymore. The patch marks logical cpu 0 as present in common code without that architecture code had a chance to setup the logical to physical map. With that change the cpu detection code assumes that the physical cpu address of cpu 0 is also 0, which is not necessarily true. Subsequently the physical cpu address of the ipl cpu will be mapped to a different logical cpu. If that cpu is brought online later the ipl cpu will send itself an initial cpu reset sigp signal. This in turn completely resets the ipl cpu and the system stops working. A dump of such a system looks like a "store status" has been forgotten. But actually the kernel itself removed all traces which would allow to easily tell what went wrong. To fix this initialize the logical to physical cpu address already in smp_setup_processor_id(). In addition remove the initialization of the cpu_present_mask and cpu_online_mask for cpu 0, since that has already been done. Also add a sanity check, just in case common code will be changed again... The problem can be easily reproduced within a z/VM guest: > chcpu -d 0 > vmcp ipl Fixes: af51160e ("s390/smp: initialize cpu_present_mask in setup_arch") Reported-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Marcelo Henrique Cerri authored
Reorder the operations in decompress_kernel() to ensure initrd is moved to a safe location before the bss section is zeroed. During decompression bss can overlap with the initrd and this can corrupt the initrd contents depending on the size of the compressed kernel (which affects where the initrd is placed by the bootloader) and the size of the bss section of the decompressor. Also use the correct initrd size when checking for overlaps with parmblock. Fixes: 06c0dd72 ([S390] fix boot failures with compressed kernels) Cc: stable@vger.kernel.org Reviewed-by:
Joy Latten <joy.latten@canonical.com> Reviewed-by:
Vineetha HariPai <vineetha.hari.pai@canonical.com> Signed-off-by:
Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Signed-off-by:
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Martin Schwidefsky authored
This adds a new system call to enable the use of guarded storage for user space processes. The system call takes two arguments, a command and pointer to a guarded storage control block: s390_guarded_storage(int command, struct gs_cb *gs_cb); The second argument is relevant only for the GS_SET_BC_CB command. The commands in detail: 0 - GS_ENABLE Enable the guarded storage facility for the current task. The initial content of the guarded storage control block will be all zeros. After the enablement the user space code can use load-guarded-storage-controls instruction (LGSC) to load an arbitrary control block. While a task is enabled the kernel will save and restore the current content of the guarded storage registers on context switch. 1 - GS_DISABLE Disables the use of the guarded storage facility for the current task. The kernel will cease to save and restore the content of the guarded storage registers, the task specific content of these registers is lost. 2 - GS_SET_BC_CB Set a broadcast guarded storage control block. This is called per thread and stores a specific guarded storage control block in the task struct of the current task. This control block will be used for the broadcast event GS_BROADCAST. 3 - GS_CLEAR_BC_CB Clears the broadcast guarded storage control block. The guarded- storage control block is removed from the task struct that was established by GS_SET_BC_CB. 4 - GS_BROADCAST Sends a broadcast to all thread siblings of the current task. Every sibling that has established a broadcast guarded storage control block will load this control block and will be enabled for guarded storage. The broadcast guarded storage control block is used up, a second broadcast without a refresh of the stored control block with GS_SET_BC_CB will not have any effect. Signed-off-by:
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- 21 Mar, 2017 11 commits
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Huang Ying authored
Before commit 452b94b8 ("mm/swap: don't BUG_ON() due to uninitialized swap slot cache"), the following bug is reported, ------------[ cut here ]------------ kernel BUG at mm/swap_slots.c:270! invalid opcode: 0000 [#1] SMP CPU: 5 PID: 1745 Comm: (sd-pam) Not tainted 4.11.0-rc1-00243-g24c534bb #1 Hardware name: System manufacturer System Product Name/Z170-K, BIOS 1803 05/06/2016 RIP: 0010:free_swap_slot+0xba/0xd0 Call Trace: swap_free+0x36/0x40 do_swap_page+0x360/0x6d0 __handle_mm_fault+0x880/0x1080 handle_mm_fault+0xd0/0x240 __do_page_fault+0x232/0x4d0 do_page_fault+0x20/0x70 page_fault+0x22/0x30 ---[ end trace aefc9ede53e0ab21 ]--- This is raised by the BUG_ON(!swap_slot_cache_initialized) in free_swap_slot(). This is incorrect, because even if the swap slots cache fails to be initialized, the swap should operate properly without the swap slots cache. And the use_swap_slot_cache check later in the function will protect the uninitialized swap slots cache case. In commit 452b94b8, the BUG_ON() is replaced by WARN_ON_ONCE(). In the patch, the WARN_ON_ONCE() is removed too. Reported-by:
Linus Torvalds <torvalds@linux-foundation.org> Acked-by:
Tim Chen <tim.c.chen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by:
"Huang, Ying" <ying.huang@intel.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Nine small fixes: the biggest is probably finally sorting out Kconfig issues with lpfc nvme. There are some performance fixes for megaraid and hpsa and a static checker fix" [ Johannes Thumshirn points out that there still seems to be more lpfc vs nvme config issues. Oh well. - Linus ] * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: lpfc: Finalize Kconfig options for nvme scsi: ufs: don't check unsigned type for a negative value scsi: hpsa: do not timeout reset operations scsi: hpsa: limit outstanding rescans scsi: hpsa: update check for logical volume status scsi: megaraid_sas: Driver version upgrade scsi: megaraid_sas: raid6 also require cpuSel check same as raid5 scsi: megaraid_sas: add correct return type check for ldio hint logic for raid1 scsi: megaraid_sas: enable intx only if msix request fails
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID fixes from Jiri Kosina: - regression fixes for Wacom devices, from Aaron Armstrong Skomra and Ping Cheng - memory leak in hid-sony driver from Roderick Colenbrander - new device IDs support from Oscar Campos and Daniel Drake * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: wacom: generic: Wacom mouse is only provided for opaque tablets HID: corsair: Add driver Scimitar Pro RGB gaming mouse 1b1c:1b3e support to hid-corsair HID: corsair: support for K65-K70 Rapidfire and Scimitar Pro RGB HID: wacom: don't manually release resources for the EKR HID: wacom: Correct Intuos Pro 2 resolution HID: sony: Fix input device leak when connecting a DS4 twice using USB/BT HID: chicony: Add support for another ASUS Zen AiO keyboard
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpioLinus Torvalds authored
Pull GPIO fixes from Linus Walleij: "Here is the first set of GPIO fixes for 4.11. It was delayed a bit beacuse I was chicken when linux-next was not rotating last week. This hits the ST serial driver in drivers/tty/serial and that has an ACK from Greg, he suggested to keep the old GPIO fwnode API around to smoothen things in the merge Windod and those have now served their purpose so we take them out and convert the last driver to the new API. Apart from that it's fixes as usual. Summary: - set the parent on the Altera A10SR driver, also fix high level IRQs. - fix error path on the mockup driver. - compilation noise about unused functions fixed. - fix missed interrupts on the MCP23S08 expander, this is also tagged for stable. - retire the interrim helpers devm_get_gpiod_from_child() used to smoothen merging in the merge window" * tag 'gpio-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio:mcp23s08 Fixed missing interrupts serial: st-asc: Use new GPIOD API to obtain RTS pin gpio: altera: Use handle_level_irq when configured as a level_high gpio: xgene: mark PM functions as __maybe_unused gpio: mockup: return -EFAULT if copy_from_user() fails gpio: altera-a10sr: Set gpio_chip parent property -
git://github.com/andersson/remoteprocLinus Torvalds authored
Pull remoteproc fix from Bjorn Andersson: "This fixes a Kbuild dependency issue related to the Qualcomm remoteproc drivers" * tag 'rproc-v4.11-fixes' of git://github.com/andersson/remoteproc: remoteproc: qcom: fix QCOM_SMD dependencies
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git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fsLinus Torvalds authored
Pull f2fs fixes from Jaegeuk Kim: - fix performance regression reported by lkp-rebot - fix potential data lost after power-cut due to SSR reallocation * tag 'for-f2fs-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: f2fs: combine nat_bits and free_nid_bitmap cache f2fs: skip scanning free nid bitmap of full NAT blocks f2fs: use __set{__clear}_bit_le f2fs: declare static functions f2fs: don't overwrite node block by SSR
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Ping Cheng authored
Commit f85c9dc6 ("Support tool ID and additional tool types") introduced mouse and lens cursor tools to generic codepath, which covers both display (direct) and opaque tablets (indirect devices). However, mouse and lens cursor tools are only provided for opaque tablets. This patch ignores mouse and lens cursor tools if the device is a display tablet. Signed-off-by:
Ping Cheng <ping.cheng@wacom.com> Reviewed-by:
Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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Oscar Campos authored
This mouse sold by Corsair as Scimitar PRO RGB defines two consecutive Logical Minimum items in its Application (Consumer.0001) report making it non parseable. This patch fixes the report descriptor overriding byte 77 in rdesc from 0x16 (Logical Minimum with 16 bits value) to 0x26 (Logical Maximum with 16 bits value). Signed-off-by:
Oscar Campos <oscar.campos@member.fsf.org> Signed-off-by:
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Oscar Campos authored
Add quirks for several corsair gaming devices to avoid long delays on report initialization Supported devices: - Corsair K65RGB Rapidfire Gaming Keyboard - Corsair K70RGB Rapidfire Gaming Keyboard - Corsair Scimitar Pro RGB Gaming Mouse Signed-off-by:
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Aaron Armstrong Skomra authored
Commit 5b779fc5 introduces the manual release of resources in wacom_remove() as an addition to the driver's use of devm. The EKR resources can only be released through wacom_remote_destroy_one() so we skip the manual release for it. Fixes: 5b779fc5 ("HID: wacom: release the resources before leaving despite devm") Signed-off-by:
Aaron Armstrong Skomra <skomra@gmail.com> Reviewed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
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Aaron Armstrong Skomra authored
The features struct for the second gen Intuos Pro uses the wrong constant for the resolution. This fix is for commit 4922cd26. Fixes: 4922cd26 ("HID: wacom: Support 2nd-gen Intuos Pro's Bluetooth classic interface") Signed-off-by:
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- 20 Mar, 2017 3 commits
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Arnd Bergmann authored
qcom_smd_register_edge() is provided by either QCOM_SMD or RPMSG_QCOM_SMD, and if both of them are disabled, it does nothing. The check for the PIL drivers however only checks for QCOM_SMD, so it breaks with QCOM_SMD=n && RPMSG_QCOM_SMD=m: drivers/remoteproc/built-in.o: In function `smd_subdev_remove': qcom_wcnss_iris.c:(.text+0x231c): undefined reference to `qcom_smd_unregister_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_wcnss_iris.c:(.text+0x2344): undefined reference to `qcom_smd_register_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_q6v5_pil.c:(.text+0x3538): undefined reference to `qcom_smd_register_edge' qcom_q6v5_pil.c:(.text+0x3538): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_smd_register_edge' This clarifies the Kconfig dependency. Fixes: 4b48921a ("remoteproc: qcom: Use common SMD edge handler") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Bjorn Andersson <bjorn.andersson@linaro.org>
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Chao Yu authored
Both nat_bits cache and free_nid_bitmap cache provide same functionality as a intermediate cache between free nid cache and disk, but with different granularity of indicating free nid range, and different persistence policy. nat_bits cache provides better persistence ability, and free_nid_bitmap provides better granularity. In this patch we combine advantage of both caches, so finally policy of the intermediate cache would be: - init: load free nid status from nat_bits into free_nid_bitmap - lookup: scan free_nid_bitmap before load NAT blocks - update: update free_nid_bitmap in real-time - persistence: udpate and persist nat_bits in checkpoint This patch also resolves performance regression reported by lkp-robot. commit: 4ac91242 ("f2fs: introduce free nid bitmap") d00030cf9cd0bb96fdccc41e33d3c91dcbb672ba ("f2fs: use __set{__clear}_bit_le") 1382c0f3f9d3f936c8bc42ed1591cf7a593ef9f7 ("f2fs: combine nat_bits and free_nid_bitmap cache") 4ac91242 d00030cf9cd0bb96fdccc41e33 1382c0f3f9d3f936c8bc42ed15 ---------------- -------------------------- -------------------------- %stddev %change %stddev %change %stddev \ | \ | \ 77863 ± 0% +2.1% 79485 ± 1% +50.8% 117404 ± 0% aim7.jobs-per-min 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time.max 896604 ± 0% -0.8% 889221 ± 3% -20.2% 715260 ± 1% aim7.time.involuntary_context_switches 2394 ± 1% +4.6% 2503 ± 1% +3.7% 2481 ± 2% aim7.time.maximum_resident_set_size 6240 ± 0% -1.5% 6145 ± 1% -14.1% 5360 ± 1% aim7.time.system_time 1111357 ± 3% +1.9% 1132509 ± 2% -6.2% 1041932 ± 2% aim7.time.voluntary_context_switches ... Signed-off-by:
Chao Yu <yuchao0@huawei.com> Tested-by:
Xiaolong Ye <xiaolong.ye@intel.com> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
This patch adds to account free nids for each NAT blocks, and while scanning all free nid bitmap, do check count and skip lookuping in full NAT block. Signed-off-by:
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