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get_mem_detect_end is already used in couple of places with potential
to be utilized in more cases. Provide single get_mem_detect_end
implementation in asm/mem_detect.h to be used by kasan and startup code.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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"cmma" option setup already recognises some textual values. Yet kstrtobool
is a more common way to parse boolean values, reuse it to unify option
value parsing behavior and simplify code a bit.
While at it, __setup value parsing callbacks are expected to return
1 when an option is recognized, and returning any other value won't
trigger any error message currently, so simply return 1.
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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"vdso" option setup already recognises integer and textual values. Yet
kstrtobool is a more common way to parse boolean values, reuse it to
unify option value parsing behavior and simplify code a bit.
While at it, __setup value parsing callbacks are expected to return
1 when an option is recognized, and returning any other value won't
trigger any error message currently, so simply return 1.
Also don't change default vdso_enabled value of 1 when "vdso" option
value is invalid.
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Check val is not NULL before accessing it. This might happen if
corresponding kernel command line options are used without specifying
values.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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When command line options are used without specifying values
(e.g. "emu_size" instead of "emu_size="), the value is NULL. Check that
before performing string operations and further processing.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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The context used to store the key blob used a fixed 80 bytes
buffer. And all the set_key functions did not even check the given key
size. With CCA variable length AES cipher keys there come key blobs
with about 136 bytes and maybe in the future there will arise the need
to store even bigger key blobs.
This patch reworks the paes set_key functions and the context
buffers to work with small key blobs (<= 128 bytes) directly in the
context buffer and larger blobs by allocating additional memory and
storing the pointer in the context buffer. If there has been memory
allocated for storing a key blob, it also needs to be freed on release
of the tfm. So all the paes ciphers now have a init and exit function
implemented for this job.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Introduce new ioctls and structs to be used with these new ioctls
which are able to handle CCA AES secure keys and CCA AES cipher keys:
PKEY_GENSECK2: Generate secure key, version 2.
Generate either a CCA AES secure key or a CCA AES cipher key.
PKEY_CLR2SECK2: Generate secure key from clear key value, version 2.
Construct a CCA AES secure key or CCA AES cipher key from a given
clear key value.
PKEY_VERIFYKEY2: Verify the given secure key, version 2.
Check for correct key type. If cardnr and domain are given, also
check if this apqn is able to handle this type of key. If cardnr and
domain are 0xFFFF, on return these values are filled with an apqn
able to handle this key. The function also checks for the master key
verification patterns of the key matching to the current or
alternate mkvp of the apqn. CCA AES cipher keys are also checked
for CPACF export allowed (CPRTCPAC flag). Currently CCA AES secure
keys and CCA AES cipher keys are supported (may get extended in the
future).
PKEY_KBLOB2PROTK2: Transform a key blob (of any type) into
a protected key, version 2. Difference to version 1 is only that
this new ioctl has additional parameters to provide a list of
apqns to be used for the transformation.
PKEY_APQNS4K: Generate a list of APQNs based on the key blob given.
Is able to find out which type of secure key is given (CCA AES
secure key or CCA AES cipher key) and tries to find all matching
crypto cards based on the MKVP and maybe other criterias (like CCA
AES cipher keys need a CEX6C or higher). The list of APQNs is
further filtered by the key's mkvp which needs to match to either
the current mkvp or the alternate mkvp (which is the old mkvp on CCA
adapters) of the apqns. The flags argument may be used to limit the
matching apqns. If the PKEY_FLAGS_MATCH_CUR_MKVP is given, only the
current mkvp of each apqn is compared. Likewise with the
PKEY_FLAGS_MATCH_ALT_MKVP. If both are given it is assumed to return
apqns where either the current or the alternate mkvp matches. If no
matching APQN is found, the ioctl returns with 0 but the
apqn_entries value is 0.
PKEY_APQNS4KT: Generate a list of APQNs based on the key type given.
Build a list of APQNs based on the given key type and maybe further
restrict the list by given master key verification patterns.
For different key types there may be different ways to match the
master key verification patterns. For CCA keys (CCA data key and CCA
cipher key) the first 8 bytes of cur_mkvp refer to the current mkvp
value of the apqn and the first 8 bytes of the alt_mkvp refer to the
old mkvp. The flags argument controls if the apqns current and/or
alternate mkvp should match. If the PKEY_FLAGS_MATCH_CUR_MKVP is
given, only the current mkvp of each apqn is compared. Likewise with
the PKEY_FLAGS_MATCH_ALT_MKVP. If both are given, it is assumed to
return apqns where either the current or the alternate mkvp
matches. If no matching APQN is found, the ioctl returns with 0 but
the apqn_entries value is 0.
These new ioctls are now prepared for another new type of secure key
blob which may come in the future. They all use a pointer to the key
blob and a key blob length information instead of some hardcoded byte
array. They all use the new enums pkey_key_type, pkey_key_size and
pkey_key_info for getting/setting key type, key size and additional
info about the key. All but the PKEY_VERIFY2 ioctl now work based on a
list of apqns. This list is walked through trying to perform the
operation on exactly this apqn without any further checking (like card
type or online state). If the apqn fails, simple the next one in the
list is tried until success (return 0) or the end of the list is
reached (return -1 with errno ENODEV). All apqns in the list need to
be exact apqns (0xFFFF as any card or domain is not allowed). There
are two new ioctls which can be used to build a list of apqns based on
a key or key type and maybe restricted by match to a current or
alternate master key verifcation pattern.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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There are a lot of pkey functions exported as in-kernel callable
API functions but not used at all. This patch narrows down the
pkey in-kernel API to what is currently only used and exploited.
Within the kernel just use u32 without any leading __u32. Also
functions declared in a header file in arch/s390/include/asm
don't need a comment 'In-kernel API', this is by definition,
otherwise the header file would be in arch/s390/include/uapi/asm.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Make a usable value out of "mem" option once and for all. Kasan memory
allocator just takes memory_end or online memory size as allocation
base. If memory_end is not aligned paging structures allocated in kasan
end up unaligned as well. So this change fixes potential kasan crash
as well.
Fixes: 78333d1f908a ("s390/kasan: add support for mem= kernel parameter")
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Move .dma.text section alignment out of section description, otherwise
zeros used to align the section are included in the section itself (and
section is not really aligned by itself).
$ objdump -h arch/s390/boot/compressed/vmlinux
5 .dma.text 00001e38 000000000001b1c8 000000000001b1c8 0001c1c8 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
6 .dma.ex_table 00000018 000000000001d000 000000000001d000 0001e000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .dma.data 00000240 000000000001d080 000000000001d080 0001e080 2**7
CONTENTS, ALLOC, LOAD, DATA
$ cat /sys/kernel/debug/memblock/reserved
0: 0x0000000000000000..0x0000000000011fff
1: 0x000000000001b1c8..0x000000000001d2bf
...
Also add alignment before _edma linker symbol definition, so that entire
.dma* region is rounded up to page boundaries.
$ objdump -h arch/s390/boot/compressed/vmlinux
5 .dma.text 00001000 000000000001c000 000000000001c000 0001d000 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
6 .dma.ex_table 00000018 000000000001d000 000000000001d000 0001e000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .dma.data 00000240 000000000001d080 000000000001d080 0001e080 2**7
CONTENTS, ALLOC, LOAD, DATA
$ cat /sys/kernel/debug/memblock/reserved
0: 0x0000000000000000..0x0000000000011fff
1: 0x000000000001c000..0x000000000001dfff
...
$ cat /sys/kernel/debug/kernel_page_tables
---[ Identity Mapping ]---
0x0000000000000000-0x000000000001c000 112K PTE RW NX
0x000000000001c000-0x000000000001d000 4K PTE RO X
0x000000000001d000-0x0000000000100000 908K PTE RW NX
...
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Use common arch_stack_walk infrastructure to avoid duplicated code and
avoid taking care of the stack storage and filtering.
Common code also uses try_get_task_stack/put_task_stack when needed which
have been missing in our code, which also solves potential problem for us.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Reading other running task's stack can be a dangerous endeavor. Kasan
stack memory access instrumentation includes special prologue and epilogue
to mark/remove red zones in shadow memory between stack variables. For
that reason there is always a race between a task reading value in other
task's stack and that other task returning from a function and entering
another one generating different red zones pattern.
To avoid kasan reports simply perform uninstrumented memory reads.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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With THREAD_INFO_IN_TASK (which is selected on s390) task's stack usage
is refcounted and should always be protected by get/put when touching
other task's stack to avoid race conditions with task's destruction code.
Fixes: d5c352cdd022 ("s390: move thread_info into task_struct")
Cc: stable@vger.kernel.org # v4.10+
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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s390 kasan code uses sclp_early_printk to report initialization
failures. The code doing that should not be instrumented, because kasan
shadow memory has not been set up yet. Even though sclp_early_core.c is
compiled with instrumentation disabled it uses strlen function, which
is instrumented and would produce shadow memory access if used. To
avoid that, introduce uninstrumented __strlen function to be used
instead.
Before commit 7e0d92f00246 ("s390/kasan: improve string/memory functions
checks") few string functions (including strlen) were escaping kasan
instrumentation due to usage of platform specific versions which are
implemented in inline assembly.
Fixes: 7e0d92f00246 ("s390/kasan: improve string/memory functions checks")
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Clean uncompressed kernel .bss section in the startup code before
the uncompressed kernel is executed. At this point of time initrd and
certificates have been already rescued. Uncompressed kernel .bss size
is known from vmlinux_info. It is also taken into consideration during
uncompressed kernel positioning by kaslr (so it is safe to clean it).
With that uncompressed kernel is starting with .bss section zeroed and
no .bss section usage restrictions apply. Which makes chkbss checks for
uncompressed kernel objects obsolete and they can be removed.
early_nobss.c is also not needed anymore. Parts of it which are still
relevant are moved to early.c. Kasan initialization code is now called
directly from head64 (early.c is instrumented and should not be
executed before kasan shadow memory is set up).
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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sizes.h and vmlinux.scr.lds are not generated since commit 369f91c37451
("s390/decompressor: rework uncompressed image info collection").
vmlinux.bin.full is not generated since commit 183ab05ff285 ("s390: get
rid of the first mb of uncompressed image").
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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The startup code is getting more complicated with features like kaslr and
secure boot in place. In a potential unexpected startup code crash case
the system would end up in a pgm check loop at address 0, overwriting
pgm check old psw value and just making debugging more complicated. To
avoid that introduce startup program check handler which is active
immediately after kernel start and until early_pgm_check_handler is set
in kernel/early.c. So it covers kernel relocation phase and transition
to it. This pgm check handler simply saves general/control registers and
psw in the save area which should guarantee that we still have something
to look at when standalone dumper is called without saving registers. And
it does disabled wait with a faulty address in the end.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Reference counters are preferred to use refcount_t instead of
atomic_t.
This is because the implementation of refcount_t can prevent
overflows and detect possible use-after-free.
So convert atomic_t ref counters to refcount_t.
Link: http://lkml.kernel.org/r/20190808071826.6649-1-hslester96@gmail.com
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Reference counters are preferred to use refcount_t instead of
atomic_t.
This is because the implementation of refcount_t can prevent
overflows and detect possible use-after-free.
So convert atomic_t ref counters to refcount_t.
Link: http://lkml.kernel.org/r/20190808071817.6595-1-hslester96@gmail.com
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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This patch alters the for loop iteration scheme in zpci_map_resources
to make it more usual. Thus, the patch generalizes the style for
PCI_IOV_RESOURCES iteration and improves readability.
Link: http://lkml.kernel.org/r/20190806160137.29275-1-efremov@linux.com
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Few other crucial memory setup options are already handled in
the startup code. Those values are needed by kaslr and kasan
implementations. "vmalloc" is the last piece required for future
improvements such as early decision on kernel page levels depth required
for actual memory setup, as well as vmalloc memory area access monitoring
in kasan.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx
Pull SPDX fixes from Greg KH:
"Here are some small SPDX fixes for 5.3-rc2 for things that came in
during the 5.3-rc1 merge window that we previously missed.
Only three small patches here:
- two uapi patches to resolve some SPDX tags that were not correct
- fix an invalid SPDX tag in the iomap Makefile file
All have been properly reviewed on the public mailing lists"
* tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
iomap: fix Invalid License ID
treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again
treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Olof Johansson:
"Here's the first batch of fixes for this release cycle.
Main diffstat here is the re-deletion of netx. I messed up and most
likely didn't remove the files from the index when I test-merged this
and saw conflicts, and from there on out 'git rerere' remembered the
mistake and I missed checking it. Here it's done again as expected.
Besides that:
- A defconfig refresh + enabling of new drivers for u8500
- i.MX fixlets for i2c/SAI/pinmux
- sleep.S build fix for Davinci
- Broadcom devicetree build/warning fix"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
ARM: defconfig: u8500: Add new drivers
ARM: defconfig: u8500: Refresh defconfig
ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux
ARM: davinci: fix sleep.S build error on ARMv4
arm64: dts: imx8mq: fix SAI compatible
arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
ARM: dts: imx6ul: fix clock frequency property name of I2C buses
ARM: Delete netx a second time
ARM: dts: imx7ulp: Fix usb-phy unit address format
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of x86 fixes and functional updates:
- Prevent stale huge I/O TLB mappings on 32bit. A long standing bug
which got exposed by KPTI support for 32bit
- Prevent bogus access_ok() warnings in arch_stack_walk_user()
- Add display quirks for Lenovo devices which have height and width
swapped
- Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of
the CR2 bug fix series.
- Unbreak handling of force enabled HPET by moving the 'is HPET
counting' check back to the original place.
- A more accurate check for running on a hypervisor platform in the
MDS mitigation code. Not perfect, but more accurate than the
previous one.
- Update a stale and confusing comment vs. IRQ stacks"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/speculation/mds: Apply more accurate check on hypervisor platform
x86/hpet: Undo the early counter is counting check
x86/entry/32: Pass cr2 to do_async_page_fault()
x86/irq/64: Update stale comment
x86/sysfb_efi: Add quirks for some devices with swapped width and height
x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()
mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()
x86/mm: Sync also unmappings in vmalloc_sync_all()
x86/mm: Check for pfn instead of page in vmalloc_sync_one()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A pile of perf related fixes:
Kernel:
- Fix SLOTS PEBS event constraints for Icelake CPUs
- Add the missing mask bit to allow counting hardware generated
prefetches on L3 for Icelake CPUs
- Make the test for hypervisor platforms more accurate (as far as
possible)
- Handle PMUs correctly which override event->cpu
- Yet another missing fallthrough annotation
Tools:
perf.data:
- Fix loading of compressed data split across adjacent records
- Fix buffer size setting for processing CPU topology perf.data
header.
perf stat:
- Fix segfault for event group in repeat mode
- Always separate "stalled cycles per insn" line, it was being
appended to the "instructions" line.
perf script:
- Fix --max-blocks man page description.
- Improve man page description of metrics.
- Fix off by one in brstackinsn IPC computation.
perf probe:
- Avoid calling freeing routine multiple times for same pointer.
perf build:
- Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings
treated as errors, breaking the build"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Mark expected switch fall-throughs
perf/core: Fix creating kernel counters for PMUs that override event->cpu
perf/x86: Apply more accurate check on hypervisor platform
perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register
perf/x86/intel: Fix SLOTS PEBS event constraint
perf build: Do not use -Wshadow on gcc < 4.8
perf probe: Avoid calling freeing routine multiple times for same pointer
perf probe: Set pev->nargs to zero after freeing pev->args entries
perf session: Fix loading of compressed data split across adjacent records
perf stat: Always separate stalled cycles per insn
perf stat: Fix segfault for event group in repeat mode
perf tools: Fix proper buffer size for feature processing
perf script: Fix off by one in brstackinsn IPC computation
perf script: Improve man page description of metrics
perf script: Fix --max-blocks man page description
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git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva:
"This marks switch cases where we are expecting to fall through, and
globally enables the -Wimplicit-fallthrough option in the main
Makefile.
Finally, some missing-break fixes that have been tagged for -stable:
- drm/amdkfd: Fix missing break in switch statement
- drm/amdgpu/gfx10: Fix missing break in switch statement
With these changes, we completely get rid of all the fall-through
warnings in the kernel"
* tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
Makefile: Globally enable fall-through warning
drm/i915: Mark expected switch fall-throughs
drm/amd/display: Mark expected switch fall-throughs
drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning
drm/amdgpu/gfx10: Fix missing break in switch statement
drm/amdkfd: Fix missing break in switch statement
perf/x86/intel: Mark expected switch fall-throughs
mtd: onenand_base: Mark expected switch fall-through
afs: fsclient: Mark expected switch fall-throughs
afs: yfsclient: Mark expected switch fall-throughs
can: mark expected switch fall-throughs
firewire: mark expected switch fall-throughs
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Add ABI to kernel image file which allows e.g. the file utility to
figure out the kernel version.
- Wire up clone3 system call.
- Add support for kasan bitops instrumentation.
- uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.
- Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly
defined with 2 GB instead of the default value of 1 MB.
- Farhan Ali leaves the group of vfio-ccw maintainers.
- Various small vfio-ccw fixes.
- Add missing locking for airq_areas array in virtio code.
- Minor qdio improvements.
* tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
MAINTAINERS: vfio-ccw: Remove myself as the maintainer
s390/mm: use shared variables for sysctl range check
virtio/s390: fix race on airq_areas[]
s390/dma: provide proper ARCH_ZONE_DMA_BITS value
s390/kasan: add bitops instrumentation
s390/bitops: make test functions return bool
s390: wire up clone3 system call
kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test
s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header
s390/hypfs: fix a typo in the name of a function
s390/qdio: restrict QAOB usage to IQD unicast queues
s390/qdio: add sanity checks to the fast-requeue path
s390: enable detection of kernel version from bzImage
Documentation: fix vfio-ccw doc
vfio-ccw: Update documentation for csch/hsch
vfio-ccw: Don't call cp_free if we are processing a channel program
vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
vfio-ccw: Fix memory leak and don't call cp_free in cp_init
vfio-ccw: Fix misleading comment when setting orb.cmd.c64
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Pull documentation fixes from Jonathan Corbet:
"This is mostly a set of follow-on fixes from Mauro fixing various
fallout from the massive RST conversion; a few other small fixes as
well"
* tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits)
docs: phy: Drop duplicate 'be made'
doc:it_IT: translations in process/
docs/vm: transhuge: fix typo in madvise reference
doc:it_IT: rephrase statement
doc:it_IT: align translation to mainline
docs: load_config.py: ensure subdirs end with "/"
docs: virtual: add it to the documentation body
docs: remove extra conf.py files
docs: load_config.py: avoid needing a conf.py just due to LaTeX docs
scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output
scripts/sphinx-pre-install: cleanup Gentoo checks
scripts/sphinx-pre-install: fix latexmk dependencies
scripts/sphinx-pre-install: don't use LaTeX with CentOS 7
scripts/sphinx-pre-install: fix script for RHEL/CentOS
docs: conf.py: only use CJK if the font is available
docs: conf.py: add CJK package needed by translations
docs: pdf: add all Documentation/*/index.rst to PDF output
docs: fix broken doc references due to renames
docs: power: add it to to the main documentation index
docs: powerpc: convert docs to ReST and rename to *.rst
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"There's more here than we usually have at this stage, but that's
mainly down to the stacktrace changes which came in slightly too late
for the merge window.
Summary:
- Big bad batch of MAINTAINERS updates
- Fix handling of SP alignment fault exceptions
- Fix PSTATE.SSBS handling on heterogeneous systems
- Fix fallout from moving to the generic vDSO implementation
- Fix stack unwinding in the face of frame corruption
- Fix off-by-one in IORT code
- Minor SVE cleanups"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id()
arm64: entry: SP Alignment Fault doesn't write to FAR_EL1
arm64: Force SSBS on context switch
MAINTAINERS: Update my email address
MAINTAINERS: Update my email address
MAINTAINERS: Fix spelling mistake in my name
MAINTAINERS: Update my email address to @kernel.org
arm64: mm: Drop pte_huge()
arm64/sve: Fix a couple of magic numbers for the Z-reg count
arm64/sve: Factor out FPSIMD to SVE state conversion
arm64: stacktrace: Better handle corrupted stacks
arm64: stacktrace: Factor out backtrace initialisation
arm64: stacktrace: Constify stacktrace.h functions
arm64: vdso: Cleanup Makefiles
arm64: vdso: fix flip/flop vdso build bug
arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso
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Since commit eec4844fae7c ("proc/sysctl: add shared variables for range
check") special shared variables are available for sysctl range check.
Reuse them for /proc/sys/vm/allocate_pgste proc handler.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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On s390 ZONE_DMA is up to 2G, i.e. ARCH_ZONE_DMA_BITS should be 31 bits.
The current value is 24 and makes __dma_direct_alloc_pages() take a
wrong turn first (but __dma_direct_alloc_pages() recovers then).
Let's correct ARCH_ZONE_DMA_BITS value and avoid wrong turns.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Petr Tesarik <ptesarik@suse.cz>
Fixes: c61e9637340e ("dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warnings:
arch/x86/events/intel/core.c: In function ‘intel_pmu_init’:
arch/x86/events/intel/core.c:4959:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
pmem = true;
~~~~~^~~~~~
arch/x86/events/intel/core.c:4960:2: note: here
case INTEL_FAM6_SKYLAKE_MOBILE:
^~~~
arch/x86/events/intel/core.c:5008:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
pmem = true;
~~~~~^~~~~~
arch/x86/events/intel/core.c:5009:2: note: here
case INTEL_FAM6_ICELAKE_MOBILE:
^~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Paul Walmsley:
"Four minor RISC-V-related changes:
- Add support for the new clone3 syscall for RV64, relying on the
generic support
- Add DT data for the gigabit Ethernet controller on the SiFive FU540
and the HiFive Unleashed board
- Update MAINTAINERS to add me to the arch/riscv maintainers' list
- Add support for PCIe message-signaled interrupts by reusing the
generic header file"
* tag 'riscv/for-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: dts: Add DT node for SiFive FU540 Ethernet controller driver
riscv: include generic support for MSI irqdomains
MAINTAINERS: Add Paul as a RISC-V maintainer
riscv: enable sys_clone3 syscall for rv64
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In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warnings:
arch/x86/events/intel/core.c: In function ‘intel_pmu_init’:
arch/x86/events/intel/core.c:4959:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/events/intel/core.c:5008:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
Warning level 3 was used: -Wimplicit-fallthrough=3
This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190624161913.GA32270@embeddedor
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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check_msr is used to fix a bug report in guest where KVM doesn't support
LBR MSR and cause #GP.
The msr check is bypassed on real HW to workaround a false failure,
see commit d0e1a507bdc7 ("perf/x86/intel: Disable check_msr for real HW")
When running a guest with CONFIG_HYPERVISOR_GUEST not set or "nopv"
enabled, current check isn't enough and #GP could trigger.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1564022366-18293-1-git-send-email-zhenzhong.duan@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The Intel SDM states that bit 13 of Icelake's MSR_OFFCORE_RSP_x
register is valid, and used for counting hardware generated prefetches
of L3 cache. Update the bitmask to allow bit 13.
Before:
$ perf stat -e cpu/event=0xb7,umask=0x1,config1=0x1bfff/u sleep 3
Performance counter stats for 'sleep 3':
<not supported> cpu/event=0xb7,umask=0x1,config1=0x1bfff/u
After:
$ perf stat -e cpu/event=0xb7,umask=0x1,config1=0x1bfff/u sleep 3
Performance counter stats for 'sleep 3':
9,293 cpu/event=0xb7,umask=0x1,config1=0x1bfff/u
Signed-off-by: Yunying Sun <yunying.sun@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: alexander.shishkin@linux.intel.com
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: jolsa@redhat.com
Cc: namhyung@kernel.org
Link: https://lkml.kernel.org/r/20190724082932.12833-1-yunying.sun@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Sampling SLOTS event and ref-cycles event in a group on Icelake gives
EINVAL.
SLOTS event is the event stands for the fixed counter 3, not fixed
counter 2. Wrong mask was set to SLOTS event in
intel_icl_pebs_event_constraints[].
Reported-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 6017608936c1 ("perf/x86/intel: Add Icelake support")
Link: https://lkml.kernel.org/r/20190723200429.8180-1-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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X86_HYPER_NATIVE isn't accurate for checking if running on native platform,
e.g. CONFIG_HYPERVISOR_GUEST isn't set or "nopv" is enabled.
Checking the CPU feature bit X86_FEATURE_HYPERVISOR to determine if it's
running on native platform is more accurate.
This still doesn't cover the platforms on which X86_FEATURE_HYPERVISOR is
unsupported, e.g. VMware, but there is nothing which can be done about this
scenario.
Fixes: 8a4b06d391b0 ("x86/speculation/mds: Add sysfs reporting for MDS")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1564022349-17338-1-git-send-email-zhenzhong.duan@oracle.com
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Rui reported that on a Pentium D machine which has HPET forced enabled
because it is not advertised by ACPI, the early counter is counting check
leads to a silent boot hang.
The reason is that the ordering of checking the counter first and then
reconfiguring the HPET fails to work on that machine. As the HPET is not
advertised and presumably not initialized by the BIOS the early enable and
the following reconfiguration seems to bring it into a broken state. Adding
clocksource=jiffies to the command line results in the following
clocksource watchdog warning:
clocksource: timekeeping watchdog on CPU1:
Marking clocksource 'tsc-early' as unstable because the skew is too large:
clocksource: 'hpet' wd_now: 33 wd_last: 33 mask: ffffffff
That clearly shows that the HPET is not counting after it got reconfigured
and reenabled. If the counter is not working then the HPET timer is not
expiring either, which explains the boot hang.
Move the counter is counting check after the full configuration again to
unbreak these systems.
Reported-by: Rui Salvaterra <rsalvaterra@gmail.com>
Fixes: 3222daf970f3 ("x86/hpet: Separate counter check out of clocksource register code")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907250810530.1791@nanos.tec.linutronix.de
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UAPI headers licensed under GPL are supposed to have exception
"WITH Linux-syscall-note" so that they can be included into non-GPL
user space application code.
The exception note is missing in some UAPI headers.
Some of them slipped in by the treewide conversion commit b24413180f56
("License cleanup: add SPDX GPL-2.0 license identifier to files with
no license"). Just run:
$ git show --oneline b24413180f56 -- arch/x86/include/uapi/asm/
I believe they are not intentional, and should be fixed too.
This patch was generated by the following script:
git grep -l --not -e Linux-syscall-note --and -e SPDX-License-Identifier \
-- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild |
while read file
do
sed -i -e '/[[:space:]]OR[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \
-e '/[[:space:]]or[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \
-e '/[[:space:]]OR[[:space:]]/!{/[[:space:]]or[[:space:]]/!s/\(GPL-[^[:space:]]*\)/\1 WITH Linux-syscall-note/g}' $file
done
After this patch is applied, there are 5 UAPI headers that do not contain
"WITH Linux-syscall-note". They are kept untouched since this exception
applies only to GPL variants.
$ git grep --not -e Linux-syscall-note --and -e SPDX-License-Identifier \
-- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild
include/uapi/drm/panfrost_drm.h:/* SPDX-License-Identifier: MIT */
include/uapi/linux/batman_adv.h:/* SPDX-License-Identifier: MIT */
include/uapi/linux/qemu_fw_cfg.h:/* SPDX-License-Identifier: BSD-3-Clause */
include/uapi/linux/vbox_err.h:/* SPDX-License-Identifier: MIT */
include/uapi/linux/virtio_iommu.h:/* SPDX-License-Identifier: BSD-3-Clause */
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"An assortment of non-regression fixes that have accumulated since the
start of the merge window.
- A fix for a user triggerable oops on machines where transactional
memory is disabled, eg. Power9 bare metal, Power8 with TM disabled
on the command line, or all Power7 or earlier machines.
- Three fixes for handling of PMU and power saving registers when
running nested KVM on Power9.
- Two fixes for bugs found while stress testing the XIVE interrupt
controller code, also on Power9.
- A fix to allow guests to boot under Qemu/KVM on Power9 using the
the Hash MMU with >= 1TB of memory.
- Two fixes for bugs in the recent DMA cleanup, one of which could
lead to checkstops.
- And finally three fixes for the PAPR SCM nvdimm driver.
Thanks to: Alexey Kardashevskiy, Andrea Arcangeli, Cédric Le Goater,
Christoph Hellwig, David Gibson, Gautham R. Shenoy, Michael Neuling,
Oliver O'Halloran, Satheesh Rajendran, Shawn Anastasio, Suraj Jitindar
Singh, Vaibhav Jain"
* tag 'powerpc-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/papr_scm: Force a scm-unbind if initial scm-bind fails
powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALL
powerpc/pseries: Update SCM hcall op-codes in hvcall.h
powerpc/tm: Fix oops on sigreturn on systems without TM
powerpc/dma: Fix invalid DMA mmap behavior
KVM: PPC: Book3S HV: XIVE: fix rollback when kvmppc_xive_create fails
powerpc/xive: Fix loop exit-condition in xive_find_target_in_mask()
powerpc: fix off by one in max_zone_pfn initialization for ZONE_DMA
KVM: PPC: Book3S HV: Save and restore guest visible PSSCR bits on pseries
powerpc/pmu: Set pmcregs_in_use in paca when running as LPAR
KVM: PPC: Book3S HV: Always save guest pmu for guest capable of nesting
powerpc/mm: Limit rma_size to 1TB when running without HV mode
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Pull KVM fixes from Paolo Bonzini:
"Bugfixes, a pvspinlock optimization, and documentation moving"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: X86: Boost queue head vCPU to mitigate lock waiter preemption
Documentation: move Documentation/virtual to Documentation/virt
KVM: nVMX: Set cached_vmcs12 and cached_shadow_vmcs12 NULL after free
KVM: X86: Dynamically allocate user_fpu
KVM: X86: Fix fpu state crash in kvm guest
Revert "kvm: x86: Use task structs fpu field for user"
KVM: nVMX: Clear pending KVM_REQ_GET_VMCS12_PAGES when leaving nested
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Commit 11752adb (locking/pvqspinlock: Implement hybrid PV queued/unfair locks)
introduces hybrid PV queued/unfair locks
- queued mode (no starvation)
- unfair mode (good performance on not heavily contended lock)
The lock waiter goes into the unfair mode especially in VMs with over-commit
vCPUs since increaing over-commitment increase the likehood that the queue
head vCPU may have been preempted and not actively spinning.
However, reschedule queue head vCPU timely to acquire the lock still can get
better performance than just depending on lock stealing in over-subscribe
scenario.
Testing on 80 HT 2 socket Xeon Skylake server, with 80 vCPUs VM 80GB RAM:
ebizzy -M
vanilla boosting improved
1VM 23520 25040 6%
2VM 8000 13600 70%
3VM 3100 5400 74%
The lock holder vCPU yields to the queue head vCPU when unlock, to boost queue
head vCPU which is involuntary preemption or the one which is voluntary halt
due to fail to acquire the lock after a short spin in the guest.
Cc: Waiman Long <longman@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Commit a0d14b8909de ("x86/mm, tracing: Fix CR2 corruption") added the
address parameter to do_async_page_fault(), but does not pass it from the
32-bit entry point. To plumb it through, factor-out
common_exception_read_cr2 in the same fashion as common_exception, and uses
it from both page_fault and async_page_fault.
For a 32-bit KVM guest, this fixes:
Run /sbin/init as init process
Starting init: /sbin/init exists but couldn't execute it (error -14)
Fixes: a0d14b8909de ("x86/mm, tracing: Fix CR2 corruption")
Signed-off-by: Matt Mullins <mmullins@fb.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190724042058.24506-1-mmullins@fb.com
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Renaming docs seems to be en vogue at the moment, so fix on of the
grossly misnamed directories. We usually never use "virtual" as
a shortcut for virtualization in the kernel, but always virt,
as seen in the virt/ top-level directory. Fix up the documentation
to match that.
Fixes: ed16648eb5b8 ("Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
- Fix build issues when kprobes are enabled
- Speed up ITLB/DTLB cache flushes when running on machines with
combined TLBs
* 'parisc-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines
parisc: add kprobe_fault_handler()
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git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes
i.MX fixes for 5.3:
- Fix i.MX8MM SAI3 RXC/TXFS pinmux configuration.
- Fix i.MX7ULP usb-phy unit address to drop extra '0x' notation.
- Fix typo of clock frequency property name in a few i.MX6UL board
I2C buses.
- Drop "fsl,imx6sx-sai" from i.MX8M SAI device, as it's not compatible
with i.MX6SX SAI.
* tag 'imx-fixes-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
arm64: dts: imx8mq: fix SAI compatible
arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
ARM: dts: imx6ul: fix clock frequency property name of I2C buses
ARM: dts: imx7ulp: Fix usb-phy unit address format
Link: https://lore.kernel.org/r/20190723090827.GU15632@dragon
Signed-off-by: Olof Johansson <olof@lixom.net>
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This enables the new or updates driver options for U8500
that got merged into v5.3-rc1:
- CMA, MCDE driver, LIMA driver and the Samsung S6D16D0 driver
enabled by default bringing up the new graphics support.
Include the LOGO so we can see when the graphics are live.
- We use the IIO hwmon bridge for reflecting temperature
in the system.
- Set MUSB to PIO mode as this is the one working most stable
for the time being.
- HWSPINLOCK needs to be set to get the hardware semaphore
driver to compile and link properly.
Link: https://lore.kernel.org/r/20190723081523.13079-2-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This refreshes the outdated U8500 defconfig: some options
moved around, PS/2 mouse is no longer default on, crypto
options moved around etc.
Link: https://lore.kernel.org/r/20190723081523.13079-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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The mdio-bus-mux has no #address-cells/#size-cells property,
which causes a few dtc warnings:
arch/arm/boot/dts/bcm47094-linksys-panamera.dts:129.4-18: Warning (reg_format): /mdio-bus-mux/mdio@200:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
arch/arm/boot/dts/bcm47094-linksys-panamera.dts:128.22-132.5: Warning (avoid_default_addr_size): /mdio-bus-mux/mdio@200: Relying on default #address-cells value
arch/arm/boot/dts/bcm47094-linksys-panamera.dts:128.22-132.5: Warning (avoid_default_addr_size): /mdio-bus-mux/mdio@200: Relying on default #size-cells value
Add the normal cell numbers.
Link: https://lore.kernel.org/r/20190722145618.1155492-1-arnd@arndb.de
Fixes: 2bebdfcdcd0f ("ARM: dts: BCM5301X: Add support for Linksys EA9500")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
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