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bce159d734
9659 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
bce159d734 |
for-5.8/drivers-2020-06-01
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Merge tag 'for-5.8/drivers-2020-06-01' of git://git.kernel.dk/linux-block
Pull block driver updates from Jens Axboe:
"On top of the core changes, here are the block driver changes for this
merge window:
- NVMe changes:
- NVMe over Fibre Channel protocol updates, which also reach
over to drivers/scsi/lpfc (James Smart)
- namespace revalidation support on the target (Anthony
Iliopoulos)
- gcc zero length array fix (Arnd Bergmann)
- nvmet cleanups (Chaitanya Kulkarni)
- misc cleanups and fixes (me, Keith Busch, Sagi Grimberg)
- use a SRQ per completion vector (Max Gurtovoy)
- fix handling of runtime changes to the queue count (Weiping
Zhang)
- t10 protection information support for nvme-rdma and
nvmet-rdma (Israel Rukshin and Max Gurtovoy)
- target side AEN improvements (Chaitanya Kulkarni)
- various fixes and minor improvements all over, icluding the
nvme part of the lpfc driver"
- Floppy code cleanup series (Willy, Denis)
- Floppy contention fix (Jiri)
- Loop CONFIGURE support (Martijn)
- bcache fixes/improvements (Coly, Joe, Colin)
- q->queuedata cleanups (Christoph)
- Get rid of ioctl_by_bdev (Christoph, Stefan)
- md/raid5 allocation fixes (Coly)
- zero length array fixes (Gustavo)
- swim3 task state fix (Xu)"
* tag 'for-5.8/drivers-2020-06-01' of git://git.kernel.dk/linux-block: (166 commits)
bcache: configure the asynchronous registertion to be experimental
bcache: asynchronous devices registration
bcache: fix refcount underflow in bcache_device_free()
bcache: Convert pr_<level> uses to a more typical style
bcache: remove redundant variables i and n
lpfc: Fix return value in __lpfc_nvme_ls_abort
lpfc: fix axchg pointer reference after free and double frees
lpfc: Fix pointer checks and comments in LS receive refactoring
nvme: set dma alignment to qword
nvmet: cleanups the loop in nvmet_async_events_process
nvmet: fix memory leak when removing namespaces and controllers concurrently
nvmet-rdma: add metadata/T10-PI support
nvmet: add metadata support for block devices
nvmet: add metadata/T10-PI support
nvme: add Metadata Capabilities enumerations
nvmet: rename nvmet_check_data_len to nvmet_check_transfer_len
nvmet: rename nvmet_rw_len to nvmet_rw_data_len
nvmet: add metadata characteristics for a namespace
nvme-rdma: add metadata/T10-PI support
nvme-rdma: introduce nvme_rdma_sgl structure
...
|
||
|
Linus Torvalds
|
a5a82e0a59 |
platform-drivers-x86 for v5.8-1
* Add a support of the media keys on the ASUS laptop UX325JA/UX425JA
* ASUS WMI driver can now handle 2-in-1 models T100TA, T100CHI, T100HA, T200TA
* Big refactoring of Intel SCU driver with Elkhart Lake support has been added
* Slim Bootloarder firmware update signaling WMI driver has been added
* Thinkpad ACPI driver can handle dual fan configuration on new P and X models
* Touchscreen DMI driver has been extended to support
- MP-man MPWIN895CL tablet
- ONDA V891 v5 tablet
- techBite Arc 11.6
- Trekstor Twin 10.1
- Trekstor Yourbook C11B
- Vinga J116
* Virtual Button driver got a few fixes to detect mode of 2-in-1 tablet models
* Intel Speed Select tools update
* Plenty of small cleanups here and there
The following is an automated git shortlog grouped by driver:
acerhdf:
- replace space by * in modalias
New drivers:
- Add Elkhart Lake SCU/PMC support
- Add Slim Bootloader firmware update signaling driver
asus-laptop:
- Drop duplicate check for led_classdev_unregister()
asus-nb-wmi:
- Revert "Do not load on Asus T100TA and T200TA"
- Do not load on Asus T100TA and T200TA
asus-wmi:
- Ignore WMI events with code 0x79
- Add support for SW_TABLET_MODE
- Move asus_wmi_input_init and _exit lower in the file
- Drop duplicate check for led_classdev_unregister()
- Reserve more space for struct bias_args
- remove redundant initialization of variable status
dcdbas:
- Check SMBIOS for protected buffer address
dell-laptop:
- don't register micmute LED if there is no token
dell-wmi:
- Ignore keyboard attached / detached events
device property:
- export set_secondary_fwnode() to modules
eeepc-laptop:
- Drop duplicate check for led_classdev_unregister()
hp-wmi:
- Introduce HPWMI_POWER_FW_OR_HW as convenient shortcut
- Convert simple_strtoul() to kstrtou32()
- Refactor postcode_store() to follow standard patterns
intel_cht_int33fe:
- Fix spelling issues
- Switch to use acpi_dev_hid_uid_match()
- Convert to use set_secondary_fwnode()
- Convert software node array to group
intel-hid:
- Add a quirk to support HP Spectre X2 (2015)
intel_mid_powerbtn:
- Convert to use new SCU IPC API
intel_pmc_core:
- avoid unused-function warnings
- Change Jasper Lake S0ix debug reg map back to ICL
intel_pmc_ipc:
- Convert to MFD
- Move PCI IDs to intel_scu_pcidrv.c
- Drop intel_pmc_ipc_command()
- Start using SCU IPC
intel_scu_ipc:
- Add managed function to register SCU IPC
- Introduce new SCU IPC API
- Move legacy SCU IPC API to a separate header
- Log more information if SCU IPC command fails
- Split out SCU IPC functionality from the SCU driver
intel_scu_ipcutil:
- Convert to use new SCU IPC API
intel-speed-select:
- Fix speed-select-base-freq-properties output on CLX-N
intel_telemetry:
- Add telemetry_get_pltdata()
- Convert to use new SCU IPC API
intel-vbtn:
- Only blacklist SW_TABLET_MODE on the 9 / "Laptop" chasis-type
- Detect switch position before registering the input-device
- Move detect_tablet_mode() to higher in the file
- Fix probe failure on devices with only switches
- Also handle tablet-mode switch on "Detachable" and "Portable" chassis-types
- Do not advertise switches to userspace if they are not there
- Split keymap into buttons and switches parts
- Use acpi_evaluate_integer()
ISST:
- Increase timeout
lg-laptop:
- Drop duplicate check for led_classdev_unregister()
MAINTAINERS:
- Add me as maintainer of Intel SCU drivers
- Update entry for Intel Broxton PMC driver
Merges of immutable branches:
- Merge branch 'for-next'
- Merge branch 'ib-mfd-x86-usb-watchdog-v5.7'
- Merge branch 'ib-pdx86-properties'
mfd:
- intel_soc_pmic_mrfld: Convert to use new SCU IPC API
- intel_soc_pmic_bxtwc: Convert to use new SCU IPC API
- intel_soc_pmic: Add SCU IPC member to struct intel_soc_pmic
samsung-laptop:
- Drop duplicate check for led_classdev_unregister()
software node:
- Allow register and unregister software node groups
sony-laptop:
- Make resuming thermal profile safer
- SNC calls should handle BUFFER types
thinkpad_acpi:
- Replace custom approach by kstrtoint()
- Use strndup_user() in dispatch_proc_write()
- Replace next_cmd(&buf) with strsep(&buf, ",")
- Drop duplicate check for led_classdev_unregister()
- Remove always false 'value < 0' statement
- Add support for dual fan control
tools/power/x86/intel-speed-select:
- Fix invalid core mask
- Increase CPU count
- Fix json perf-profile output output
- Update version
- Enable clos for turbo-freq enable
- Fix CLX-N package information output
- Check support status before enable
- Change debug to error
toshiba_acpi:
- Drop duplicate check for led_classdev_unregister()
touchscreen_dmi:
- Update Trekstor Twin 10.1 entry
- Add info for the Trekstor Yourbook C11B
- Drop comma in terminator line
- add Vinga J116 touchscreen
- Add info for the ONDA V891 v5 tablet
- Add touchscreen info for techBite Arc 11.6.
- Add info for the MP-man MPWIN895CL tablet
usb:
- typec: mux: Convert the Intel PMC Mux driver to use new SCU IPC API
watchdog:
- iTCO: fix link error
- intel-mid_wdt: Convert to use new SCU IPC API
wmi:
- Describe function parameters
- Fix indentation in some cases
- Replace UUID redefinitions by their originals
x86/platform/intel-mid:
- Add empty stubs for intel_scu_devices_[create|destroy]()
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Merge tag 'platform-drivers-x86-v5.8-1' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver updates from Andy Shevchenko:
- Add a support of the media keys on the ASUS laptop UX325JA/UX425JA
- ASUS WMI driver can now handle 2-in-1 models T100TA, T100CHI, T100HA,
T200TA
- Big refactoring of Intel SCU driver with Elkhart Lake support has
been added
- Slim Bootloarder firmware update signaling WMI driver has been added
- Thinkpad ACPI driver can handle dual fan configuration on new P and X
models
- Touchscreen DMI driver has been extended to support
- MP-man MPWIN895CL tablet
- ONDA V891 v5 tablet
- techBite Arc 11.6
- Trekstor Twin 10.1
- Trekstor Yourbook C11B
- Vinga J116
- Virtual Button driver got a few fixes to detect mode of 2-in-1 tablet
models
- Intel Speed Select tools update
- Plenty of small cleanups here and there
* tag 'platform-drivers-x86-v5.8-1' of git://git.infradead.org/linux-platform-drivers-x86: (89 commits)
platform/x86: dcdbas: Check SMBIOS for protected buffer address
platform/x86: asus_wmi: Reserve more space for struct bias_args
platform/x86: intel-vbtn: Only blacklist SW_TABLET_MODE on the 9 / "Laptop" chasis-type
platform/x86: intel-hid: Add a quirk to support HP Spectre X2 (2015)
platform/x86: touchscreen_dmi: Update Trekstor Twin 10.1 entry
platform/x86: touchscreen_dmi: Add info for the Trekstor Yourbook C11B
platform/x86: hp-wmi: Introduce HPWMI_POWER_FW_OR_HW as convenient shortcut
platform/x86: hp-wmi: Convert simple_strtoul() to kstrtou32()
platform/x86: hp-wmi: Refactor postcode_store() to follow standard patterns
platform/x86: acerhdf: replace space by * in modalias
platform/x86: ISST: Increase timeout
tools/power/x86/intel-speed-select: Fix invalid core mask
tools/power/x86/intel-speed-select: Increase CPU count
tools/power/x86/intel-speed-select: Fix json perf-profile output output
platform/x86: dell-wmi: Ignore keyboard attached / detached events
platform/x86: dell-laptop: don't register micmute LED if there is no token
platform/x86: thinkpad_acpi: Replace custom approach by kstrtoint()
platform/x86: thinkpad_acpi: Use strndup_user() in dispatch_proc_write()
platform/x86: thinkpad_acpi: Replace next_cmd(&buf) with strsep(&buf, ",")
platform/x86: intel-vbtn: Detect switch position before registering the input-device
...
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Linus Torvalds
|
94709049fb |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: "A few little subsystems and a start of a lot of MM patches. Subsystems affected by this patch series: squashfs, ocfs2, parisc, vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup, swap, memcg, pagemap, memory-failure, vmalloc, kasan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits) kasan: move kasan_report() into report.c mm/mm_init.c: report kasan-tag information stored in page->flags ubsan: entirely disable alignment checks under UBSAN_TRAP kasan: fix clang compilation warning due to stack protector x86/mm: remove vmalloc faulting mm: remove vmalloc_sync_(un)mappings() x86/mm/32: implement arch_sync_kernel_mappings() x86/mm/64: implement arch_sync_kernel_mappings() mm/ioremap: track which page-table levels were modified mm/vmalloc: track which page-table levels were modified mm: add functions to track page directory modifications s390: use __vmalloc_node in stack_alloc powerpc: use __vmalloc_node in alloc_vm_stack arm64: use __vmalloc_node in arch_alloc_vmap_stack mm: remove vmalloc_user_node_flags mm: switch the test_vmalloc module to use __vmalloc_node mm: remove __vmalloc_node_flags_caller mm: remove both instances of __vmalloc_node_flags mm: remove the prot argument to __vmalloc_node mm: remove the pgprot argument to __vmalloc ... |
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Joerg Roedel
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7f0a002b5a |
x86/mm: remove vmalloc faulting
Remove fault handling on vmalloc areas, as the vmalloc code now takes care of synchronizing changes to all page-tables in the system. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20200515140023.25469-8-joro@8bytes.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Joerg Roedel
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86cf69f1d8 |
x86/mm/32: implement arch_sync_kernel_mappings()
Implement the function to sync changes in vmalloc and ioremap ranges to all page-tables. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20200515140023.25469-6-joro@8bytes.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Joerg Roedel
|
8e19843c36 |
x86/mm/64: implement arch_sync_kernel_mappings()
Implement the function to sync changes in vmalloc and ioremap ranges to all page-tables. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20200515140023.25469-5-joro@8bytes.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Christoph Hellwig
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88dca4ca5a |
mm: remove the pgprot argument to __vmalloc
The pgprot argument to __vmalloc is always PAGE_KERNEL now, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv] Acked-by: Gao Xiang <xiang@kernel.org> [erofs] Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Wei Liu <wei.liu@kernel.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-22-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Christoph Hellwig
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cca98e9f8b |
mm: enforce that vmap can't map pages executable
To help enforcing the W^X protection don't allow remapping existing pages as executable. x86 bits from Peter Zijlstra, arm64 bits from Mark Rutland. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Mark Rutland <mark.rutland@arm.com>. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-20-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Christoph Hellwig
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78bb17f76e |
x86/hyperv: use vmalloc_exec for the hypercall page
Patch series "decruft the vmalloc API", v2. Peter noticed that with some dumb luck you can toast the kernel address space with exported vmalloc symbols. I used this as an opportunity to decruft the vmalloc.c API and make it much more systematic. This also removes any chance to create vmalloc mappings outside the designated areas or using executable permissions from modules. Besides that it removes more than 300 lines of code. This patch (of 29): Use the designated helper for allocating executable kernel memory, and remove the now unused PAGE_KERNEL_RX define. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Acked-by: Wei Liu <wei.liu@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: http://lkml.kernel.org/r/20200414131348.444715-1-hch@lst.de Link: http://lkml.kernel.org/r/20200414131348.444715-2-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
8b39a57e96 |
Merge branch 'work.set_fs-exec' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess/coredump updates from Al Viro: "set_fs() removal in coredump-related area - mostly Christoph's stuff..." * 'work.set_fs-exec' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: binfmt_elf_fdpic: remove the set_fs(KERNEL_DS) in elf_fdpic_core_dump binfmt_elf: remove the set_fs(KERNEL_DS) in elf_core_dump binfmt_elf: remove the set_fs in fill_siginfo_note signal: refactor copy_siginfo_to_user32 powerpc/spufs: simplify spufs core dumping powerpc/spufs: stop using access_ok powerpc/spufs: fix copy_to_user while atomic |
||
|
Linus Torvalds
|
4b01285e16 |
Merge branch 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess/csum updates from Al Viro:
"Regularize the sitation with uaccess checksum primitives:
- fold csum_partial_... into csum_and_copy_..._user()
- on x86 collapse several access_ok()/stac()/clac() into
user_access_begin()/user_access_end()"
* 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
default csum_and_copy_to_user(): don't bother with access_ok()
take the dummy csum_and_copy_from_user() into net/checksum.h
arm: switch to csum_and_copy_from_user()
sh32: convert to csum_and_copy_from_user()
m68k: convert to csum_and_copy_from_user()
xtensa: switch to providing csum_and_copy_from_user()
sparc: switch to providing csum_and_copy_from_user()
parisc: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
alpha: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
ia64: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
ia64: csum_partial_copy_nocheck(): don't abuse csum_partial_copy_from_user()
x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}()
x86: switch both 32bit and 64bit to providing csum_and_copy_from_user()
x86_64: csum_..._copy_..._user(): switch to unsafe_..._user()
get rid of csum_partial_copy_to_user()
|
||
|
Linus Torvalds
|
533b220f7b |
arm64 updates for 5.8
- Branch Target Identification (BTI)
* Support for ARMv8.5-BTI in both user- and kernel-space. This
allows branch targets to limit the types of branch from which
they can be called and additionally prevents branching to
arbitrary code, although kernel support requires a very recent
toolchain.
* Function annotation via SYM_FUNC_START() so that assembly
functions are wrapped with the relevant "landing pad"
instructions.
* BPF and vDSO updates to use the new instructions.
* Addition of a new HWCAP and exposure of BTI capability to
userspace via ID register emulation, along with ELF loader
support for the BTI feature in .note.gnu.property.
* Non-critical fixes to CFI unwind annotations in the sigreturn
trampoline.
- Shadow Call Stack (SCS)
* Support for Clang's Shadow Call Stack feature, which reserves
platform register x18 to point at a separate stack for each
task that holds only return addresses. This protects function
return control flow from buffer overruns on the main stack.
* Save/restore of x18 across problematic boundaries (user-mode,
hypervisor, EFI, suspend, etc).
* Core support for SCS, should other architectures want to use it
too.
* SCS overflow checking on context-switch as part of the existing
stack limit check if CONFIG_SCHED_STACK_END_CHECK=y.
- CPU feature detection
* Removed numerous "SANITY CHECK" errors when running on a system
with mismatched AArch32 support at EL1. This is primarily a
concern for KVM, which disabled support for 32-bit guests on
such a system.
* Addition of new ID registers and fields as the architecture has
been extended.
- Perf and PMU drivers
* Minor fixes and cleanups to system PMU drivers.
- Hardware errata
* Unify KVM workarounds for VHE and nVHE configurations.
* Sort vendor errata entries in Kconfig.
- Secure Monitor Call Calling Convention (SMCCC)
* Update to the latest specification from Arm (v1.2).
* Allow PSCI code to query the SMCCC version.
- Software Delegated Exception Interface (SDEI)
* Unexport a bunch of unused symbols.
* Minor fixes to handling of firmware data.
- Pointer authentication
* Add support for dumping the kernel PAC mask in vmcoreinfo so
that the stack can be unwound by tools such as kdump.
* Simplification of key initialisation during CPU bringup.
- BPF backend
* Improve immediate generation for logical and add/sub
instructions.
- vDSO
- Minor fixes to the linker flags for consistency with other
architectures and support for LLVM's unwinder.
- Clean up logic to initialise and map the vDSO into userspace.
- ACPI
- Work around for an ambiguity in the IORT specification relating
to the "num_ids" field.
- Support _DMA method for all named components rather than only
PCIe root complexes.
- Minor other IORT-related fixes.
- Miscellaneous
* Initialise debug traps early for KGDB and fix KDB cacheflushing
deadlock.
* Minor tweaks to early boot state (documentation update, set
TEXT_OFFSET to 0x0, increase alignment of PE/COFF sections).
* Refactoring and cleanup
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"A sizeable pile of arm64 updates for 5.8.
Summary below, but the big two features are support for Branch Target
Identification and Clang's Shadow Call stack. The latter is currently
arm64-only, but the high-level parts are all in core code so it could
easily be adopted by other architectures pending toolchain support
Branch Target Identification (BTI):
- Support for ARMv8.5-BTI in both user- and kernel-space. This allows
branch targets to limit the types of branch from which they can be
called and additionally prevents branching to arbitrary code,
although kernel support requires a very recent toolchain.
- Function annotation via SYM_FUNC_START() so that assembly functions
are wrapped with the relevant "landing pad" instructions.
- BPF and vDSO updates to use the new instructions.
- Addition of a new HWCAP and exposure of BTI capability to userspace
via ID register emulation, along with ELF loader support for the
BTI feature in .note.gnu.property.
- Non-critical fixes to CFI unwind annotations in the sigreturn
trampoline.
Shadow Call Stack (SCS):
- Support for Clang's Shadow Call Stack feature, which reserves
platform register x18 to point at a separate stack for each task
that holds only return addresses. This protects function return
control flow from buffer overruns on the main stack.
- Save/restore of x18 across problematic boundaries (user-mode,
hypervisor, EFI, suspend, etc).
- Core support for SCS, should other architectures want to use it
too.
- SCS overflow checking on context-switch as part of the existing
stack limit check if CONFIG_SCHED_STACK_END_CHECK=y.
CPU feature detection:
- Removed numerous "SANITY CHECK" errors when running on a system
with mismatched AArch32 support at EL1. This is primarily a concern
for KVM, which disabled support for 32-bit guests on such a system.
- Addition of new ID registers and fields as the architecture has
been extended.
Perf and PMU drivers:
- Minor fixes and cleanups to system PMU drivers.
Hardware errata:
- Unify KVM workarounds for VHE and nVHE configurations.
- Sort vendor errata entries in Kconfig.
Secure Monitor Call Calling Convention (SMCCC):
- Update to the latest specification from Arm (v1.2).
- Allow PSCI code to query the SMCCC version.
Software Delegated Exception Interface (SDEI):
- Unexport a bunch of unused symbols.
- Minor fixes to handling of firmware data.
Pointer authentication:
- Add support for dumping the kernel PAC mask in vmcoreinfo so that
the stack can be unwound by tools such as kdump.
- Simplification of key initialisation during CPU bringup.
BPF backend:
- Improve immediate generation for logical and add/sub instructions.
vDSO:
- Minor fixes to the linker flags for consistency with other
architectures and support for LLVM's unwinder.
- Clean up logic to initialise and map the vDSO into userspace.
ACPI:
- Work around for an ambiguity in the IORT specification relating to
the "num_ids" field.
- Support _DMA method for all named components rather than only PCIe
root complexes.
- Minor other IORT-related fixes.
Miscellaneous:
- Initialise debug traps early for KGDB and fix KDB cacheflushing
deadlock.
- Minor tweaks to early boot state (documentation update, set
TEXT_OFFSET to 0x0, increase alignment of PE/COFF sections).
- Refactoring and cleanup"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (148 commits)
KVM: arm64: Move __load_guest_stage2 to kvm_mmu.h
KVM: arm64: Check advertised Stage-2 page size capability
arm64/cpufeature: Add get_arm64_ftr_reg_nowarn()
ACPI/IORT: Remove the unused __get_pci_rid()
arm64/cpuinfo: Add ID_MMFR4_EL1 into the cpuinfo_arm64 context
arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register
arm64/cpufeature: Add remaining feature bits in ID_AA64PFR0 register
arm64/cpufeature: Add remaining feature bits in ID_AA64ISAR0 register
arm64/cpufeature: Add remaining feature bits in ID_MMFR4 register
arm64/cpufeature: Add remaining feature bits in ID_PFR0 register
arm64/cpufeature: Introduce ID_MMFR5 CPU register
arm64/cpufeature: Introduce ID_DFR1 CPU register
arm64/cpufeature: Introduce ID_PFR2 CPU register
arm64/cpufeature: Make doublelock a signed feature in ID_AA64DFR0
arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register
arm64/cpufeature: Add explicit ftr_id_isar0[] for ID_ISAR0 register
arm64: mm: Add asid_gen_match() helper
firmware: smccc: Fix missing prototype warning for arm_smccc_version_init
arm64: vdso: Fix CFI directives in sigreturn trampoline
arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction
...
|
||
|
Linus Torvalds
|
88bc1de11c |
This tree cleans up various aspects of the UV platform support code,
it removes unnecessary functions and cleans up the rest. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl7VNO4RHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1i61RAAogLRVi4ga4vmTk5SqUqtR4pupbHJv5IM IjkQN0HZ3+Oi6kRxwuOQ9xOOzQWm8GntkZeyN5FA73H7x+bYdU12MIKKTEDcW3xp Mg9FtzfeL0V4YmNkmlnIXycyYA3nBdSxnI/OL/58J9CLT15qXYkWjyvkbI2aJ3qL U8xM5cTTvhoARjd43o0eAfekTg0XdUAsgvO0vOM5+I1HrQP8SR3ZIFaMSR+MfAQx Nbz/UVUSDJ8BNzmS/CfFLFm0F2dkphlLC0r6eAOFZAYSIax0bRVklxV9qdScEQMK bkVKXGanCzVTBVM1HXDycLJaILlqcS18tK+VqNIAR5x2BXmaSG8jqwCW4NM0tcaN c5zemNsqnAH/VzxeFjE2BcDQnA1nkgj75Vm9O81HMQfyqR16M5pBzRXY/qBqslya vX5wLoD962BiVtbELqW6v+Ot29xMYlCLLlTbLHaWQraJS3TjuAvL0/sOFdWgs63F N7a+BLvikfYoKCS8IxW87BFBysy9nhv/4UwdaX5RpIQ1wgx/EJLDaowrM+L6Dzmw bhQ3AgRZGNZCBDm3uGU/LigTTxN93h5KqKnuUKv3H+tNvEKxPKEAqPyvL8fO8G0U BTJiM/XRIzQrkrmwCKqON1iKRjKB2fKklxiq4REIoSqKfeiQ3SVBIHENFnH96Ekf G9qptwFEZYI= =L8Vy -----END PGP SIGNATURE----- Merge tag 'x86-platform-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 platform updates from Ingo Molnar: "This tree cleans up various aspects of the UV platform support code, it removes unnecessary functions and cleans up the rest" * tag 'x86-platform-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic/uv: Remove code for unused distributed GRU mode x86/platform/uv: Remove the unused _uv_cpu_blade_processor_id() macro x86/platform/uv: Unexport uv_apicid_hibits x86/platform/uv: Remove _uv_hub_info_check() x86/platform/uv: Simplify uv_send_IPI_one() x86/platform/uv: Mark uv_min_hub_revision_id static x86/platform/uv: Mark is_uv_hubless() static x86/platform/uv: Remove the UV*_HUB_IS_SUPPORTED macros x86/platform/uv: Unexport symbols only used by x2apic_uv_x.c x86/platform/uv: Unexport sn_coherency_id x86/platform/uv: Remove the uv_partition_coherence_id() macro x86/platform/uv: Mark uv_bios_call() and uv_bios_call_irqsave() static |
||
|
Linus Torvalds
|
0a319ef75d |
Most of the changes here related to 'XSAVES supervisor state' support,
which is a feature that allows kernel-only data to be automatically saved/restored by the FPU context switching code. CPU features that can be supported this way are Intel PT, 'PASID' and CET features. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl7VMZgRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jmAQ/7BJpyAHUjFJdChtkvUmLcBgI2qnxP7rc8 Eh/tSo4PKh484Uqb4WY6XAHIAPBzEt3rHJG3fdaavzlUl98YJCdD9tstfwMPcCQ4 L4c2Ru+h+mPQCMOZUctOphPjDzGWPzR4IhceH6gqhoS4vg9EqgN4o158x4jW6KFN Jlocp9CMfIaGSmaMlRrIUZ4Dj3mgboqqHsuCaibtaKAMK6LqZQDViTEal4mNbESX KQPOFpKrhoq6Jtzzer7fLPY2qb6kkLrL03X5IUGFP5UxigSejnfrI9SZpAuPP9S0 kdN04Jo0T2aBIAikBTVhDWdLMJk19qeu7YXBrFEVbyhZHl1HdDqOhMdWPOp1GH9W CtGUalbIvz/5FbXuUImiiNh/bw2FxYjHsrDguW96IvMVFteucrFg9QyL+taYb1cV WqWdpIC0VoMuQxQI5FBWu4Bb/cLNV9VCxWAZjZQ806kwmyDxldsw5mucMGmH3+bO LD6bwRShSMRzI9bzcJSG+Z3y7Fe8b5IGNjCjzgPb88ezffBEFHzIEKdCL6QTNlRF 6UgSGbRs41SqXwNw5tdQQNwPpDO73p+KVRGoEzyMJvojLKRGTcOHHUDriGZ30MNX 3oHvLf5+dNrLC/frbOqUmQ7doBQOplR5VxlZVwwqkdpPw13Jf5zn4ewzriTOmKCq mEHMQmbkyi4= =M+BC -----END PGP SIGNATURE----- Merge tag 'x86-fpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 FPU updates from Ingo Molnar: "Most of the changes here related to 'XSAVES supervisor state' support, which is a feature that allows kernel-only data to be automatically saved/restored by the FPU context switching code. CPU features that can be supported this way are Intel PT, 'PASID' and CET features" * tag 'x86-fpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu/xstate: Restore supervisor states for signal return x86/fpu/xstate: Preserve supervisor states for the slow path in __fpu__restore_sig() x86/fpu: Introduce copy_supervisor_to_kernel() x86/fpu/xstate: Update copy_kernel_to_xregs_err() for supervisor states x86/fpu/xstate: Update sanitize_restored_xstate() for supervisor xstates x86/fpu/xstate: Define new functions for clearing fpregs and xstates x86/fpu/xstate: Introduce XSAVES supervisor states x86/fpu/xstate: Separate user and supervisor xfeatures mask x86/fpu/xstate: Define new macros for supervisor and user xstates x86/fpu/xstate: Rename validate_xstate_header() to validate_user_xstate_header() |
||
|
Linus Torvalds
|
eff5ddadab |
Misc updates:
- Extend the x86 family/model macros with a steppings dimension,
because x86 life isn't complex enough and Intel uses steppings to
differentiate between different CPUs. :-/
- Convert the TSC deadline timer quirks to the steppings macros.
- Clean up asm mnemonics.
- Fix the handling of an AMD erratum, or in other words, fix a kernel erratum.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-cpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpu updates from Ingo Molnar:
"Misc updates:
- Extend the x86 family/model macros with a steppings dimension,
because x86 life isn't complex enough and Intel uses steppings to
differentiate between different CPUs. :-/
- Convert the TSC deadline timer quirks to the steppings macros.
- Clean up asm mnemonics.
- Fix the handling of an AMD erratum, or in other words, fix a kernel
erratum"
* tag 'x86-cpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Use RDRAND and RDSEED mnemonics in archrandom.h
x86/cpu: Use INVPCID mnemonic in invpcid.h
x86/cpu/amd: Make erratum #1054 a legacy erratum
x86/apic: Convert the TSC deadline timer matching to steppings macro
x86/cpu: Add a X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS() macro
x86/cpu: Add a steppings field to struct x86_cpu_id
|
||
|
Linus Torvalds
|
17e0a7cb6a |
Misc cleanups, with an emphasis on removing obsolete/dead code.
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||
|
Linus Torvalds
|
58ff3b7604 |
The EFI changes for this cycle are:
- preliminary changes for RISC-V
- Add support for setting the resolution on the EFI framebuffer
- Simplify kernel image loading for arm64
- Move .bss into .data via the linker script instead of relying on symbol
annotations.
- Get rid of __pure getters to access global variables
- Clean up the config table matching arrays
- Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently
- Simplify and unify initrd loading
- Parse the builtin command line on x86 (if provided)
- Implement printk() support, including support for wide character strings
- Simplify GDT handling in early mixed mode thunking code
- Some other minor fixes and cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'efi-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
"The EFI changes for this cycle are:
- preliminary changes for RISC-V
- Add support for setting the resolution on the EFI framebuffer
- Simplify kernel image loading for arm64
- Move .bss into .data via the linker script instead of relying on
symbol annotations.
- Get rid of __pure getters to access global variables
- Clean up the config table matching arrays
- Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them
consistently
- Simplify and unify initrd loading
- Parse the builtin command line on x86 (if provided)
- Implement printk() support, including support for wide character
strings
- Simplify GDT handling in early mixed mode thunking code
- Some other minor fixes and cleanups"
* tag 'efi-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
efi/x86: Don't blow away existing initrd
efi/x86: Drop the special GDT for the EFI thunk
efi/libstub: Add missing prototype for PE/COFF entry point
efi/efivars: Add missing kobject_put() in sysfs entry creation error path
efi/libstub: Use pool allocation for the command line
efi/libstub: Don't parse overlong command lines
efi/libstub: Use snprintf with %ls to convert the command line
efi/libstub: Get the exact UTF-8 length
efi/libstub: Use %ls for filename
efi/libstub: Add UTF-8 decoding to efi_puts
efi/printf: Add support for wchar_t (UTF-16)
efi/gop: Add an option to list out the available GOP modes
efi/libstub: Add definitions for console input and events
efi/libstub: Implement printk-style logging
efi/printf: Turn vsprintf into vsnprintf
efi/printf: Abort on invalid format
efi/printf: Refactor code to consolidate padding and output
efi/printf: Handle null string input
efi/printf: Factor out integer argument retrieval
efi/printf: Factor out width/precision parsing
...
|
||
|
Linus Torvalds
|
a7092c8204 |
Kernel side changes:
- Add AMD Fam17h RAPL support
- Introduce CAP_PERFMON to kernel and user space
- Add Zhaoxin CPU support
- Misc fixes and cleanups
Tooling changes:
perf record:
- Introduce --switch-output-event to use arbitrary events to be setup
and read from a side band thread and, when they take place a signal
be sent to the main 'perf record' thread, reusing the --switch-output
code to take perf.data snapshots from the --overwrite ring buffer, e.g.:
# perf record --overwrite -e sched:* \
--switch-output-event syscalls:*connect* \
workload
will take perf.data.YYYYMMDDHHMMSS snapshots up to around the
connect syscalls.
- Add --num-synthesize-threads option to control degree of parallelism of the
synthesize_mmap() code which is scanning /proc/PID/task/PID/maps and can be
time consuming. This mimics pre-existing behaviour in 'perf top'.
perf bench:
- Add a multi-threaded synthesize benchmark.
- Add kallsyms parsing benchmark.
Intel PT support:
- Stitch LBR records from multiple samples to get deeper backtraces,
there are caveats, see the csets for details.
- Allow using Intel PT to synthesize callchains for regular events.
- Add support for synthesizing branch stacks for regular events (cycles,
instructions, etc) from Intel PT data.
Misc changes:
- Updated perf vendor events for power9 and Coresight.
- Add flamegraph.py script via 'perf flamegraph'
- Misc other changes, fixes and cleanups - see the Git log for details.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"Kernel side changes:
- Add AMD Fam17h RAPL support
- Introduce CAP_PERFMON to kernel and user space
- Add Zhaoxin CPU support
- Misc fixes and cleanups
Tooling changes:
- perf record:
Introduce '--switch-output-event' to use arbitrary events to be
setup and read from a side band thread and, when they take place a
signal be sent to the main 'perf record' thread, reusing the core
for '--switch-output' to take perf.data snapshots from the ring
buffer used for '--overwrite', e.g.:
# perf record --overwrite -e sched:* \
--switch-output-event syscalls:*connect* \
workload
will take perf.data.YYYYMMDDHHMMSS snapshots up to around the
connect syscalls.
Add '--num-synthesize-threads' option to control degree of
parallelism of the synthesize_mmap() code which is scanning
/proc/PID/task/PID/maps and can be time consuming. This mimics
pre-existing behaviour in 'perf top'.
- perf bench:
Add a multi-threaded synthesize benchmark and kallsyms parsing
benchmark.
- Intel PT support:
Stitch LBR records from multiple samples to get deeper backtraces,
there are caveats, see the csets for details.
Allow using Intel PT to synthesize callchains for regular events.
Add support for synthesizing branch stacks for regular events
(cycles, instructions, etc) from Intel PT data.
Misc changes:
- Updated perf vendor events for power9 and Coresight.
- Add flamegraph.py script via 'perf flamegraph'
- Misc other changes, fixes and cleanups - see the Git log for details
Also, since over the last couple of years perf tooling has matured and
decoupled from the kernel perf changes to a large degree, going
forward Arnaldo is going to send perf tooling changes via direct pull
requests"
* tag 'perf-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (163 commits)
perf/x86/rapl: Add AMD Fam17h RAPL support
perf/x86/rapl: Make perf_probe_msr() more robust and flexible
perf/x86/rapl: Flip logic on default events visibility
perf/x86/rapl: Refactor to share the RAPL code between Intel and AMD CPUs
perf/x86/rapl: Move RAPL support to common x86 code
perf/core: Replace zero-length array with flexible-array
perf/x86: Replace zero-length array with flexible-array
perf/x86/intel: Add more available bits for OFFCORE_RESPONSE of Intel Tremont
perf/x86/rapl: Add Ice Lake RAPL support
perf flamegraph: Use /bin/bash for report and record scripts
perf cs-etm: Move definition of 'traceid_list' global variable from header file
libsymbols kallsyms: Move hex2u64 out of header
libsymbols kallsyms: Parse using io api
perf bench: Add kallsyms parsing
perf: cs-etm: Update to build with latest opencsd version.
perf symbol: Fix kernel symbol address display
perf inject: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*()
perf annotate: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*()
perf trace: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*()
perf script: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*()
...
|
||
|
Linus Torvalds
|
69fc06f70f |
There are a lot of objtool changes in this cycle, all across the map:
- Speed up objtool significantly, especially when there are large number of sections
- Improve objtool's understanding of special instructions such as IRET,
to reduce the number of annotations required
- Implement 'noinstr' validation
- Do baby steps for non-x86 objtool use
- Simplify/fix retpoline decoding
- Add vmlinux validation
- Improve documentation
- Fix various bugs and apply smaller cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
"There are a lot of objtool changes in this cycle, all across the map:
- Speed up objtool significantly, especially when there are large
number of sections
- Improve objtool's understanding of special instructions such as
IRET, to reduce the number of annotations required
- Implement 'noinstr' validation
- Do baby steps for non-x86 objtool use
- Simplify/fix retpoline decoding
- Add vmlinux validation
- Improve documentation
- Fix various bugs and apply smaller cleanups"
* tag 'objtool-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
objtool: Enable compilation of objtool for all architectures
objtool: Move struct objtool_file into arch-independent header
objtool: Exit successfully when requesting help
objtool: Add check_kcov_mode() to the uaccess safelist
samples/ftrace: Fix asm function ELF annotations
objtool: optimize add_dead_ends for split sections
objtool: use gelf_getsymshndx to handle >64k sections
objtool: Allow no-op CFI ops in alternatives
x86/retpoline: Fix retpoline unwind
x86: Change {JMP,CALL}_NOSPEC argument
x86: Simplify retpoline declaration
x86/speculation: Change FILL_RETURN_BUFFER to work with objtool
objtool: Add support for intra-function calls
objtool: Move the IRET hack into the arch decoder
objtool: Remove INSN_STACK
objtool: Make handle_insn_ops() unconditional
objtool: Rework allocating stack_ops on decode
objtool: UNWIND_HINT_RET_OFFSET should not check registers
objtool: is_fentry_call() crashes if call has no destination
x86,smap: Fix smap_{save,restore}() alternatives
...
|
||
|
Linus Torvalds
|
2227e5b21a |
The RCU updates for this cycle were:
- RCU-tasks update, including addition of RCU Tasks Trace for
BPF use and TASKS_RUDE_RCU
- kfree_rcu() updates.
- Remove scheduler locking restriction
- RCU CPU stall warning updates.
- Torture-test updates.
- Miscellaneous fixes and other updates.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-rcu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The RCU updates for this cycle were:
- RCU-tasks update, including addition of RCU Tasks Trace for BPF use
and TASKS_RUDE_RCU
- kfree_rcu() updates.
- Remove scheduler locking restriction
- RCU CPU stall warning updates.
- Torture-test updates.
- Miscellaneous fixes and other updates"
* tag 'core-rcu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (103 commits)
rcu: Allow for smp_call_function() running callbacks from idle
rcu: Provide rcu_irq_exit_check_preempt()
rcu: Abstract out rcu_irq_enter_check_tick() from rcu_nmi_enter()
rcu: Provide __rcu_is_watching()
rcu: Provide rcu_irq_exit_preempt()
rcu: Make RCU IRQ enter/exit functions rely on in_nmi()
rcu/tree: Mark the idle relevant functions noinstr
x86: Replace ist_enter() with nmi_enter()
x86/mce: Send #MC singal from task work
x86/entry: Get rid of ist_begin/end_non_atomic()
sched,rcu,tracing: Avoid tracing before in_nmi() is correct
sh/ftrace: Move arch_ftrace_nmi_{enter,exit} into nmi exception
lockdep: Always inline lockdep_{off,on}()
hardirq/nmi: Allow nested nmi_enter()
arm64: Prepare arch_nmi_enter() for recursion
printk: Disallow instrumenting print_nmi_enter()
printk: Prepare for nested printk_nmi_enter()
rcutorture: Convert ULONG_CMP_LT() to time_before()
torture: Add a --kasan argument
torture: Save a few lines by using config_override_param initially
...
|
||
|
Linus Torvalds
|
9bf9511e3d |
Add support for wider Memory Bandwidth Monitoring counters by querying
their width from CPUID. As a prerequsite, streamline and unify the CPUID detection of the respective resource control attributes. By Reinette Chatre. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAl7VNQYACgkQEsHwGGHe VUqFgw//Qr6Ot21wtZAgVSCOPJ7rWH4aR6Bbq9YN0/kUGk2PbAjfFK3aMekHd4u6 +cTc1eroOiWc5mXurbJ6gfmDgTYHj09DII/qXIi9wxWHPyAZ3cBltGXG9A86lIHZ hyA6l3Z+RzhnIKoATbXzaEy1nEoGMgCsezuGmN2d1KM2Fl8dmYHT+88iMDSazNb3 D51+HHvUF03+h41A11mw7Omknycpk3wOmNX0A+t55EExW8xrYjjenY+suWvhDoGj +uqDVhYjxvVziI0lsAfcDfN3R3MuPMBXJXtwf9qaZODGs4ttTg/lyHRcTqGBVwrf xGuDw0qRLvDKy9UC09H5F7ArScx9X8bOu9NFjNA2AZyLLdhVpTa5AuX1T7VroRkD rcDx++EEjVEX36wBoGbwrfZTcaL3er8sPVZiXG1dDc5/GqWfP+abx4G1JPG9xRYH V4oghEsBAJXRfGt07PTNSTqDWu/dQWmMUIVfGWX97l+5ED+HlL24MVoThkkH6f2M 7uAj8IRsbgzn207nZD8DNorARcQVsK2VvzgZzbqa0VsArt57Xk8DSZpfsqw8B7OJ OwuA/0S6nFQX9g6C0eLR68WPwv6YrLjKMEO7KJukNbaN/pcVGKXaJ/dSTwpsNQbC JZeAuc7DSYJ3Iv+xh64DvpL3hvb46J1UMRCWoVFw3ZQcnGV6t0E= =JeAm -----END PGP SIGNATURE----- Merge tag 'x86_cache_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cache resource control updates from Borislav Petkov: "Add support for wider Memory Bandwidth Monitoring counters by querying their width from CPUID. As a prerequsite for that, streamline and unify the CPUID detection of the respective resource control attributes. By Reinette Chatre" * tag 'x86_cache_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/resctrl: Support wider MBM counters x86/resctrl: Support CPUID enumeration of MBM counter width x86/resctrl: Maintain MBM counter width per resource x86/resctrl: Query LLC monitoring properties once during boot x86/resctrl: Remove unnecessary RMID checks x86/cpu: Move resctrl CPUID code to resctrl/ x86/resctrl: Rename asm/resctrl_sched.h to asm/resctrl.h |
||
|
Linus Torvalds
|
8fc984aedc |
A pile of x86 fixes:
- Prevent a memory leak in ioperm which was caused by the stupid
assumption that the exit cleanup is always called for current, which is
not the case when fork fails after taking a reference on the ioperm
bitmap.
- Fix an arithmething overflow in the DMA code on 32bit systems
- Fill gaps in the xstate copy with defaults instead of leaving them
uninitialized
- Revert: o"Make __X32_SYSCALL_BIT be unsigned long" as it turned out
that existing user space fails to build.
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Merge tag 'x86-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A pile of x86 fixes:
- Prevent a memory leak in ioperm which was caused by the stupid
assumption that the exit cleanup is always called for current,
which is not the case when fork fails after taking a reference on
the ioperm bitmap.
- Fix an arithmething overflow in the DMA code on 32bit systems
- Fill gaps in the xstate copy with defaults instead of leaving them
uninitialized
- Revert: "Make __X32_SYSCALL_BIT be unsigned long" as it turned out
that existing user space fails to build"
* tag 'x86-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ioperm: Prevent a memory leak when fork fails
x86/dma: Fix max PFN arithmetic overflow on 32 bit systems
copy_xstate_to_kernel(): don't leave parts of destination uninitialized
x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long"
|
||
|
Al Viro
|
c281a6c1ac |
x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}()
consolidate HAVE_CSUM_COPY_USER for 32bit and 64bit, while are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Al Viro
|
0a5ea224b2 |
x86: switch both 32bit and 64bit to providing csum_and_copy_from_user()
... rather than messing with the wrapper. As a side effect, 32bit variant gets access_ok() into it and can be switched to user_access_begin()/user_access_end() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Jay Lang
|
4bfe6cce13 |
x86/ioperm: Prevent a memory leak when fork fails
In the copy_process() routine called by _do_fork(), failure to allocate
a PID (or further along in the function) will trigger an invocation to
exit_thread(). This is done to clean up from an earlier call to
copy_thread_tls(). Naturally, the child task is passed into exit_thread(),
however during the process, io_bitmap_exit() nullifies the parent's
io_bitmap rather than the child's.
As copy_thread_tls() has been called ahead of the failure, the reference
count on the calling thread's io_bitmap is incremented as we would expect.
However, io_bitmap_exit() doesn't accept any arguments, and thus assumes
it should trash the current thread's io_bitmap reference rather than the
child's. This is pretty sneaky in practice, because in all instances but
this one, exit_thread() is called with respect to the current task and
everything works out.
A determined attacker can issue an appropriate ioctl (i.e. KDENABIO) to
get a bitmap allocated, and force a clone3() syscall to fail by passing
in a zeroed clone_args structure. The kernel handles the erroneous struct
and the buggy code path is followed, and even though the parent's reference
to the io_bitmap is trashed, the child still holds a reference and thus
the structure will never be freed.
Fix this by tweaking io_bitmap_exit() and its subroutines to accept a
task_struct argument which to operate on.
Fixes:
|
||
|
Waiman Long
|
2ca41f555e |
x86/spinlock: Remove obsolete ticket spinlock macros and types
Even though the x86 ticket spinlock code has been removed with
|
||
|
Alexander Dahl
|
8874347066 |
x86/dma: Fix max PFN arithmetic overflow on 32 bit systems
The intermediate result of the old term (4UL * 1024 * 1024 * 1024) is 4 294 967 296 or 0x100000000 which is no problem on 64 bit systems. The patch does not change the later overall result of 0x100000 for MAX_DMA32_PFN (after it has been shifted by PAGE_SHIFT). The new calculation yields the same result, but does not require 64 bit arithmetic. On 32 bit systems the old calculation suffers from an arithmetic overflow in that intermediate term in braces: 4UL aka unsigned long int is 4 byte wide and an arithmetic overflow happens (the 0x100000000 does not fit in 4 bytes), the in braces result is truncated to zero, the following right shift does not alter that, so MAX_DMA32_PFN evaluates to 0 on 32 bit systems. That wrong value is a problem in a comparision against MAX_DMA32_PFN in the init code for swiotlb in pci_swiotlb_detect_4gb() to decide if swiotlb should be active. That comparison yields the opposite result, when compiling on 32 bit systems. This was not possible before |
||
|
Mike Rapoport
|
431732651c |
x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit
The DISCONTIGMEM support was marked as deprecated in v5.2 and since there were no complaints about it for almost 5 releases it can be completely removed. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20200223094322.15206-1-rppt@kernel.org |
||
|
Stephane Eranian
|
5cde265384 |
perf/x86/rapl: Add AMD Fam17h RAPL support
This patch enables AMD Fam17h RAPL support for the Package level metric. The support is as per AMD Fam17h Model31h (Zen2) and model 00-ffh (Zen1) PPR. The same output is available via the energy-pkg pseudo event: $ perf stat -a -I 1000 --per-socket -e power/energy-pkg/ Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200527224659.206129-6-eranian@google.com |
||
|
Krzysztof Kozlowski
|
ed3119e455 |
x86: Hide the archdata.iommu field behind generic IOMMU_API
There is a generic, kernel wide configuration symbol for enabling the
IOMMU specific bits: CONFIG_IOMMU_API. Implementations (including
INTEL_IOMMU and AMD_IOMMU driver) select it so use it here as well.
This makes the conditional archdata.iommu field consistent with other
platforms and also fixes any compile test builds of other IOMMU drivers,
when INTEL_IOMMU or AMD_IOMMU are not selected).
For the case when INTEL_IOMMU/AMD_IOMMU and COMPILE_TEST are not
selected, this should create functionally equivalent code/choice. With
COMPILE_TEST this field could appear if other IOMMU drivers are chosen
but neither INTEL_IOMMU nor AMD_IOMMU are not.
Reported-by: kbuild test robot <lkp@intel.com>
Fixes:
|
||
|
Johan Hovold
|
e027a2bc93 |
x86/apb_timer: Drop unused declaration and macro
Drop an extern declaration that has never been used and a no longer needed macro. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200513100944.9171-2-johan@kernel.org |
||
|
Johan Hovold
|
003d805351 |
x86/apb_timer: Drop unused TSC calibration
Drop the APB-timer TSC calibration, which hasn't been used since the
removal of Moorestown support by commit
|
||
|
Andy Lutomirski
|
700d3a5a66 |
x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long"
Revert |
||
|
Ingo Molnar
|
d1343da330 |
More EFI changes for v5.8:
- Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently - Simplify and unify initrd loading - Parse the builtin command line on x86 (if provided) - Implement printk() support, including support for wide character strings - Some fixes for issues introduced by the first batch of v5.8 changes - Fix a missing prototypes warning - Simplify GDT handling in early mixed mode thunking code - Some other minor fixes and cleanups -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEnNKg2mrY9zMBdeK7wjcgfpV0+n0FAl7Lb8UACgkQwjcgfpV0 +n3/aAgAkEqqR/BoyzFiyYHujq6bXjESKYr8LrIjNWfnofB6nZqp1yXwFdL0qbj/ PTZ1qIQAnOMmj11lvy1X894h2ZLqE6XEkqv7Xd2oxkh3fF6amlQUWfMpXUuGLo1k C4QGSfA0OOiM0OOi0Aqk1fL7sTmH23/j63dTR+fH8JMuYgjdls/yWNs0miqf8W2H ftj8fAKgHIJzFvdTC0vn1DZ6dEKczGLPEcVZ2ns2IJOJ69DsStKPLcD0mlW+EgV2 EyfRSCQv55RYZRhdUOb+yVLRfU0M0IMDrrCDErHxZHXnQy00tmKXiEL20yuegv3u MUtRRw8ocn2/RskjgZkxtMjAAlty9A== =AwCh -----END PGP SIGNATURE----- Merge tag 'efi-changes-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/core More EFI changes for v5.8: - Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently - Simplify and unify initrd loading - Parse the builtin command line on x86 (if provided) - Implement printk() support, including support for wide character strings - Some fixes for issues introduced by the first batch of v5.8 changes - Fix a missing prototypes warning - Simplify GDT handling in early mixed mode thunking code - Some other minor fixes and cleanups Conflicts: drivers/firmware/efi/libstub/efistub.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Ingo Molnar
|
a5d8e55b2c |
Linux 5.7-rc7
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl7K9iEeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGzTAH/0ifZEG4BQ8x/WlB 8YLSLE6QQTSXYi25nyExuJbFkkKY5Tik8M2HD/36xwY/HnZOlH9jH6m0ntqZxpaA 3EU9lr1ct79nCBMYhiJssvz8d9AOZXlyogFW9y2y9pmPjlmUtseZ7yGh1xD465cj B5Ty2w2W34cs7zF3og2xn5agOJMtWWXLXZ5mRa9EOquKC5zeYyRicmd0T+plYQD6 hbRYmxFfDfppVnBCBARPNN0+NU5JJD94H+8bOuf1tl48XNrLiZMOicmtohKNQ6+W rZNpJNEGEp7KMtqWH0Nl3hmy3yfZHMwe1DXM/AZDqR7jTHZY4mZ0GEpLyfI9AU4n 34jVHwU= =SmJ9 -----END PGP SIGNATURE----- Merge tag 'v5.7-rc7' into efi/core, to refresh the branch and pick up fixes Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Nick Desaulniers
|
c071b0f11e |
x86: bitops: fix build regression
This is easily reproducible via CC=clang + CONFIG_STAGING=y +
CONFIG_VT6656=m.
It turns out that if your config tickles __builtin_constant_p via
differences in choices to inline or not, these statements produce
invalid assembly:
$ cat foo.c
long a(long b, long c) {
asm("orb %1, %0" : "+q"(c): "r"(b));
return c;
}
$ gcc foo.c
foo.c: Assembler messages:
foo.c:2: Error: `%rax' not allowed with `orb'
Use the `%b` "x86 Operand Modifier" to instead force register allocation
to select a lower-8-bit GPR operand.
The "q" constraint only has meaning on -m32 otherwise is treated as
"r". Not all GPRs have low-8-bit aliases for -m32.
Fixes:
|
||
|
Arvind Sankar
|
9b47c52756 |
efi/libstub: Add definitions for console input and events
Add the required typedefs etc for using con_in's simple text input protocol, and for using the boottime event services. Also add the prototype for the "stall" boot service. Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Link: https://lore.kernel.org/r/20200518190716.751506-19-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel <ardb@kernel.org> |
||
|
Benjamin Thiel
|
0e5e3d4461 |
x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall()
Lift the prototype of ia32_classify_syscall() into its own header. Signed-off-by: Benjamin Thiel <b.thiel@posteo.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200516123816.2680-1-b.thiel@posteo.de |
||
|
Peter Zijlstra
|
0d00449c7a |
x86: Replace ist_enter() with nmi_enter()
A few exceptions (like #DB and #BP) can happen at any location in the code, this then means that tracers should treat events from these exceptions as NMI-like. The interrupted context could be holding locks with interrupts disabled for instance. Similarly, #MC is an actual NMI-like exception. All of them use ist_enter() which only concerns itself with RCU, but does not do any of the other setup that NMIs need. This means things like: printk() raw_spin_lock_irq(&logbuf_lock); <#DB/#BP/#MC> printk() raw_spin_lock_irq(&logbuf_lock); are entirely possible (well, not really since printk tries hard to play nice, but the concept stands). So replace ist_enter() with nmi_enter(). Also observe that any nmi_enter() caller must be both notrace and NOKPROBE, or in the noinstr text section. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Link: https://lkml.kernel.org/r/20200505134101.525508608@linutronix.de |
||
|
Thomas Gleixner
|
b052df3da8 |
x86/entry: Get rid of ist_begin/end_non_atomic()
This is completely overengineered and definitely not an interface which should be made available to anything else than this particular MCE case. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200505134059.462640294@linutronix.de |
||
|
Uros Bizjak
|
3d81b3d1e5 |
x86/cpu: Use RDRAND and RDSEED mnemonics in archrandom.h
Current minimum required version of binutils is 2.23, which supports RDRAND and RDSEED instruction mnemonics. Replace the byte-wise specification of RDRAND and RDSEED with these proper mnemonics. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200508105817.207887-1-ubizjak@gmail.com |
||
|
Ingo Molnar
|
7c0577f4e6 |
Linux 5.7-rc6
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl7BzV8eHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGg8EH/A2pXMTxtc96RI4S sttEsUQqbakFS0Z/2tQPpMGr/qW2e5eHgsTX/a3SiUeZiIXk6f4lMFkMuctzBf7p X77cNEDwGOEdbtCXTsMcmKSde7sP2zCXsPB8xTWLyE6rnaFRgikwwkeqgkIKhp1h bvOQV0t9HNGvxGAM0iZeOvQAvFl4vd7nS123/MYbir9cugfQUSJRueQ4BiCiJqVE 6cNA7/vFzDJuFGszzIrJ7HXn/IdQMMWHkvTDjgBw0GZw1mDbGFbfbZwOeTz1ojCt smUQ4tIFxBa/VA5zx7dOy2P2keHbSVf4VLkZRPcceT7OqVS65ETmFDp+qt5NdWM5 vZ8+7/0= =CyYH -----END PGP SIGNATURE----- Merge tag 'v5.7-rc6' into objtool/core, to pick up fixes and resolve semantic conflict Resolve structural conflict between: |
||
|
Linus Torvalds
|
43567139f5 |
A single fix for early boot crashes of kernels built with gcc10 and
stack protector enabled. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAl7A+q4ACgkQEsHwGGHe VUpvtA/+NNPKVGSKZPdDlUm64JEPy7XrbzFJ+zigWGQjUPtZsDkAT4U33eQIvV5f ea7vB2u+e7iRZBExgTI1JfyjTenGpBffhubR/ueawtxeTgvZSopFajHQir/VGPlJ KQdtqe2wZek3Wux8BsKl8vcbqhgNH/LKgQzoG2y5P1LuA77MpFkMVkAoxKqbTDbt Nx7j147ffZBJHfmUHz2/nWD9r0Exu+abeSPJeO4T52ImhVkr+Pd1nFS8S+mRCHMj uJjxL/nB/sZmDDX+EX/zA7Du3ibaVa2po9cuhMTwNIPZIpak8Yyopl64fVm/N7jH w0DIc1CgEaA1IkG7lwyKSgB/T6Fsg4SQp8gM4V3BkcTgVDuhTH0J/kGrOk2+YFSc akk3420XBS4Q54BQ547woOImabxgQXDBvqBq+DhJFwP1qSllUXbZX7rlwZ3VQ160 sfmItVM0c4J9bgaXqZuwqHxJdgakaIECkXWZwpksQAzVxaOKpZo7drLq6SDhX9HH BZdm/5AhIJ5rIGaiMXsZj5cC+H341N5TlaXA+I2b0r/vVOLtbe3it1rbSsvMoZJQ 7WOesyqFSjSObDUpXZ0riLl1X+rdrCAfzHsm5IMwLAoxmv80973johZKNZIgqIoh CbPdyvaJoNK8FK6gT7bw3HNJ1ILGqk53jpWH1Gr1MlfzSzErOdQ= =5Xi5 -----END PGP SIGNATURE----- Merge tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Borislav Petkov: "A single fix for early boot crashes of kernels built with gcc10 and stack protector enabled" * tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Fix early boot crash on gcc-10, third try |
||
|
Linus Torvalds
|
5d438e071f |
A new testcase for guest debugging (gdbstub) that exposed a bunch of
bugs, mostly for AMD processors. And a few other x86 fixes. -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAl6/0xcUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroOZuwf/bQZw/SP9awLjOOVsRaSWUmwRGD4q 6KVq9+JYsPU4CyJ7P+vdsFF39a0ixoAnKWqRe/vsXdXZrdYCDUuQxh+7X+lmjKAb dCQBnoqxI0w3yuxrm9Kn6Xs1AGIWibaRlZnXUKbuyn4ecFrh08OfYKGkYsEovhxK G4ftY4/xyM7Qvm0fq7ZmzxPrkzd74HDZBvB83R6uiyPiX3w4O9qumqkUogcVXIJX l3mnvSPClDDX4FOr8uhnU93varuR7Bek4Fh+Abj4uNks/F3z9ooJO9Hy9E+V5fhY g6Oj2IrxDwJ2G6hqyucr1kujukJC1bX2nMZ1O4gNayXsxZEU/JtI0Y26SA== =EzBt -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm fixes from Paolo Bonzini: "A new testcase for guest debugging (gdbstub) that exposed a bunch of bugs, mostly for AMD processors. And a few other x86 fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: Fix off-by-one error in kvm_vcpu_ioctl_x86_setup_mce KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c KVM: SVM: Disable AVIC before setting V_IRQ KVM: Introduce kvm_make_all_cpus_request_except() KVM: VMX: pass correct DR6 for GD userspace exit KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6 KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6 KVM: nSVM: trap #DB and #BP to userspace if guest debugging is on KVM: selftests: Add KVM_SET_GUEST_DEBUG test KVM: X86: Fix single-step with KVM_SET_GUEST_DEBUG KVM: X86: Set RTM for DB_VECTOR too for KVM_EXIT_DEBUG KVM: x86: fix DR6 delivery for various cases of #DB injection KVM: X86: Declare KVM_CAP_SET_GUEST_DEBUG properly |
||
|
Yu-cheng Yu
|
eeedf15336 |
x86/fpu: Introduce copy_supervisor_to_kernel()
The XSAVES instruction takes a mask and saves only the features specified in that mask. The kernel normally specifies that all features be saved. XSAVES also unconditionally uses the "compacted format" which means that all specified features are saved next to each other in memory. If a feature is removed from the mask, all the features after it will "move up" into earlier locations in the buffer. Introduce copy_supervisor_to_kernel(), which saves only supervisor states and then moves those states into the standard location where they are normally found. Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200512145444.15483-9-yu-cheng.yu@intel.com |
||
|
Borislav Petkov
|
a9a3ed1eff |
x86: Fix early boot crash on gcc-10, third try
... or the odyssey of trying to disable the stack protector for the function which generates the stack canary value. The whole story started with Sergei reporting a boot crash with a kernel built with gcc-10: Kernel panic — not syncing: stack-protector: Kernel stack is corrupted in: start_secondary CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5—00235—gfffb08b37df9 #139 Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77M—D3H, BIOS F12 11/14/2013 Call Trace: dump_stack panic ? start_secondary __stack_chk_fail start_secondary secondary_startup_64 -—-[ end Kernel panic — not syncing: stack—protector: Kernel stack is corrupted in: start_secondary This happens because gcc-10 tail-call optimizes the last function call in start_secondary() - cpu_startup_entry() - and thus emits a stack canary check which fails because the canary value changes after the boot_init_stack_canary() call. To fix that, the initial attempt was to mark the one function which generates the stack canary with: __attribute__((optimize("-fno-stack-protector"))) ... start_secondary(void *unused) however, using the optimize attribute doesn't work cumulatively as the attribute does not add to but rather replaces previously supplied optimization options - roughly all -fxxx options. The key one among them being -fno-omit-frame-pointer and thus leading to not present frame pointer - frame pointer which the kernel needs. The next attempt to prevent compilers from tail-call optimizing the last function call cpu_startup_entry(), shy of carving out start_secondary() into a separate compilation unit and building it with -fno-stack-protector, was to add an empty asm(""). This current solution was short and sweet, and reportedly, is supported by both compilers but we didn't get very far this time: future (LTO?) optimization passes could potentially eliminate this, which leads us to the third attempt: having an actual memory barrier there which the compiler cannot ignore or move around etc. That should hold for a long time, but hey we said that about the other two solutions too so... Reported-by: Sergei Trofimovich <slyfox@gentoo.org> Signed-off-by: Borislav Petkov <bp@suse.de> Tested-by: Kalle Valo <kvalo@codeaurora.org> Cc: <stable@vger.kernel.org> Link: https://lkml.kernel.org/r/20200314164451.346497-1-slyfox@gentoo.org |
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Linus Torvalds
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f44d5c4890 |
Various tracing fixes:
- Fix a crash when having function tracing and function stack tracing on
the command line. The ftrace trampolines are created as executable and
read only. But the stack tracer tries to modify them with text_poke()
which expects all kernel text to still be writable at boot.
Keep the trampolines writable at boot, and convert them to read-only
with the rest of the kernel.
- A selftest was triggering in the ring buffer iterator code, that
is no longer valid with the update of keeping the ring buffer
writable while a iterator is reading. Just bail after three failed
attempts to get an event and remove the warning and disabling of the
ring buffer.
- While modifying the ring buffer code, decided to remove all the
unnecessary BUG() calls.
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Merge tag 'trace-v5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull more tracing fixes from Steven Rostedt:
"Various tracing fixes:
- Fix a crash when having function tracing and function stack tracing
on the command line.
The ftrace trampolines are created as executable and read only. But
the stack tracer tries to modify them with text_poke() which
expects all kernel text to still be writable at boot. Keep the
trampolines writable at boot, and convert them to read-only with
the rest of the kernel.
- A selftest was triggering in the ring buffer iterator code, that is
no longer valid with the update of keeping the ring buffer writable
while a iterator is reading.
Just bail after three failed attempts to get an event and remove
the warning and disabling of the ring buffer.
- While modifying the ring buffer code, decided to remove all the
unnecessary BUG() calls"
* tag 'trace-v5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ring-buffer: Remove all BUG() calls
ring-buffer: Don't deactivate the ring buffer on failed iterator reads
x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up
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Yu-cheng Yu
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c95473e175 |
x86/fpu/xstate: Update copy_kernel_to_xregs_err() for supervisor states
The function copy_kernel_to_xregs_err() uses XRSTOR which can work with standard or compacted format without supervisor xstates. However, when supervisor xstates are present, XRSTORS must be used. Fix it by using XRSTORS when supervisor state handling is enabled. I also considered if there were additional cases where XRSTOR might be mistakenly called instead of XRSTORS. There are only three XRSTOR sites in the kernel: 1. copy_kernel_to_xregs_booting(), already switches between XRSTOR and XRSTORS based on X86_FEATURE_XSAVES. 2. copy_user_to_xregs(), which *needs* XRSTOR because it is copying from userspace and must never copy supervisor state with XRSTORS. 3. copy_kernel_to_xregs_err() mistakenly used XRSTOR only. Fix it. [ bp: Massage commit message. ] Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20200512145444.15483-8-yu-cheng.yu@intel.com |
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Babu Moger
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37486135d3 |
KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c
Though rdpkru and wrpkru are contingent upon CR4.PKE, the PKRU resource isn't. It can be read with XSAVE and written with XRSTOR. So, if we don't set the guest PKRU value here(kvm_load_guest_xsave_state), the guest can read the host value. In case of kvm_load_host_xsave_state, guest with CR4.PKE clear could potentially use XRSTOR to change the host PKRU value. While at it, move pkru state save/restore to common code and the host_pkru field to kvm_vcpu_arch. This will let SVM support protection keys. Cc: stable@vger.kernel.org Reported-by: Jim Mattson <jmattson@google.com> Signed-off-by: Babu Moger <babu.moger@amd.com> Message-Id: <158932794619.44260.14508381096663848853.stgit@naples-babu.amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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Fenghua Yu
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b860eb8dce |
x86/fpu/xstate: Define new functions for clearing fpregs and xstates
Currently, fpu__clear() clears all fpregs and xstates. Once XSAVES supervisor states are introduced, supervisor settings (e.g. CET xstates) must remain active for signals; It is necessary to have separate functions: - Create fpu__clear_user_states(): clear only user settings for signals; - Create fpu__clear_all(): clear both user and supervisor settings in flush_thread(). Also modify copy_init_fpstate_to_fpregs() to take a mask from above two functions. Remove obvious side-comment in fpu__clear(), while at it. [ bp: Make the second argument of fpu__clear() bool after requesting it a bunch of times during review. - Add a comment about copy_init_fpstate_to_fpregs() locking needs. ] Co-developed-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20200512145444.15483-6-yu-cheng.yu@intel.com |