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2016-12-12Merge remote-tracking branches 'regulator/fix/stw481x' and ↵Mark Brown
'regulator/fix/tps65086' into regulator-linus
2016-12-12Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linusMark Brown
2016-12-12s390/cpumf: Use configuration level indication for sampling dataChristian Borntraeger
Newer hardware provides the level of virtualization that a particular sample belongs to. Use that information and fall back to the old heuristics if the sample does not contain that information. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390: provide memmove implementationHeiko Carstens
Provide an s390 specific memmove implementation which is faster than the generic implementation which copies byte-wise. For non-destructive (as defined by the mvc instruction) memmove operations the following table compares the old default implementation versus the new s390 specific implementation: size old new 1 1ns 8ns 2 2ns 8ns 4 4ns 8ns 8 7ns 8ns 16 17ns 8ns 32 35ns 8ns 64 65ns 9ns 128 146ns 10ns 256 298ns 11ns 512 537ns 11ns 1024 1193ns 19ns 2048 2405ns 36ns So only for very small sizes the old implementation is faster. For overlapping memmoves, where the mvc instruction can't be used, the new implementation is as slow as the old one. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390: cleanup arch/s390/kernel MakefileHeiko Carstens
Group all compiler flag modification lines together and sort them alphabetically. This should hopefully prevent future bugs due to missing flag modifications. Also fix indentation at some places. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390: fix initrd corruptions with gcov/kcov instrumented kernelsHeiko Carstens
The early C code within arch/s390/kernel/early.c saves ipl parameters before the bss section is cleared. When doing that it jumps to code that is potentially gcov/kcov instrumented. That code in turn will corrupt an initrd that potentially may reside in the not yet ready to be used bss section. Instead of excluding more and more code from gcov/kcov instrumentation provide an early memmove function which will be used to save ipl parameters. The verification if these parameters are actually valid will be done later. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390: exclude early C code from gcov profilingHeiko Carstens
Early C code must be excluded from gcov profiling since it may write to the bss section before - a potential initrd that resides there is rescued - the bss section is initialized (zeroed) This patch only addresses the problem that early code is instrumented for profiling, but not the problem that it jumps into other code that is still instrumented. That problem will be fixed with a follow-on patch. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390/dasd: channel path aware error recoveryStefan Haberland
With this feature, the DASD device driver more robustly handles DASDs that are attached via multiple channel paths and are subject to constant Interface-Control-Checks (IFCCs) and Channel-Control-Checks (CCCs) or loss of High-Performance-FICON (HPF) functionality on one or more of these paths. If a channel path does not work correctly, it is removed from normal operation as long as other channel paths are available. All extended error recovery states can be queried and reset via user space interfaces. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390/dasd: extend dasd path handlingStefan Haberland
Store flags and path_data per channel path. Implement get/set functions for various path masks. The patch does not add functional changes. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390: remove unused labels from entry.SHeiko Carstens
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12avr32: wire up pkey syscallsHans-Christian Noren Egtvedt
This patch wires up the new pkey_mprotect, pkey_alloc and pkey_free syscalls on AVR32.
2016-12-12AVR32-pio: Replace two seq_printf() calls by seq_puts() in pio_bank_show()Markus Elfring
Strings which did not contain data format specifications should be put into a sequence. Thus use the corresponding function "seq_puts". This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
2016-12-12AVR32-pio: Use seq_putc() in pio_bank_show()Markus Elfring
A single character (line break) should be put into a sequence. Thus use the corresponding function "seq_putc". This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
2016-12-12AVR32-clock: Combine nine seq_printf() calls into one call in clk_show()Markus Elfring
Some data were printed into a sequence by nine separate function calls. Print the same data by a single function call instead. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
2016-12-12AVR32-clock: Use seq_putc() in two functionsMarkus Elfring
A single character (line break) should be put into two sequences. Thus use the corresponding function "seq_putc". This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
2016-12-12s390/vmlogrdr: fix IUCV buffer allocationGerald Schaefer
The buffer for iucv_message_receive() needs to be below 2 GB. In __iucv_message_receive(), the buffer address is casted to an u32, which would result in either memory corruption or an addressing exception when using addresses >= 2 GB. Fix this by using GFP_DMA for the buffer allocation. Cc: stable@vger.kernel.org Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12s390/crypto: unlock on error in prng_tdes_read()Dan Carpenter
We added some new locking but forgot to unlock on error. Fixes: 57127645d79d ("s390/zcrypt: Introduce new SHA-512 based Pseudo Random Generator.") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-12-12Merge tag 'kvm-arm-for-4.10' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/ARM updates for 4.10: - Support for the GICv3 ITS on 32bit platforms - A handful of timer and GIC emulation fixes - A PMU architecture fix
2016-12-11sparc: fix a building error reported by kbuildGonglei \(Arei\)
>> arch/sparc/include/asm/topology_64.h:44:44: error: implicit declaration of function 'cpu_data' [-Werror=implicit-function-declaration] #define topology_physical_package_id(cpu) (cpu_data(cpu).proc_id) ^ Let's include cpudata.h in topology_64.h. Cc: Sam Ravnborg <sam@ravnborg.org> Cc: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Gonglei <arei.gonglei@huawei.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc64: fix typo in pgd_clear()Kirill A. Shutemov
It really has to be pgdp, not pgd. It just happend to work since all callers have 'pgd' as an argument. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc64: restore irq in error paths in iommuDan Carpenter
There are some error paths where we should restore IRQs but we don't. Fixes: bb620c3d3925 ("sparc: Make sparc64 use scalable lib/iommu-common.c functions") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc: leon: Fix a retry loop in leon_init_timers()Dan Carpenter
The original code causes a static checker warning because it has a continue inside a do { } while (0); loop. In that context, a continue and a break are equivalent. The intent was to go back to the start of the loop so the continue was a bug. I've added a retry label at the start and changed the continue to a goto retry. Then I removed the do { } while (0) loop and pulled the code in one indent level. Fixes: 2791c1a43900 ("SPARC/LEON: added support for selecting Timer Core and Timer within core") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc64: make string buffers large enoughDan Carpenter
My static checker complains that if "lvl" is ULONG_MAX (this is 64 bit) then some of the strings will overflow. I don't know if that's possible but it seems simple enough to make the buffers slightly larger. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc64: move dereference after check for NULLDan Carpenter
We shouldn't dereference "iommu" until after we have checked that it is non-NULL. Fixes: f08978b0fdbf ("sparc64: Enable sun4v dma ops to use IOMMU v2 APIs") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc: kernel: use builtin_platform_driverGeliang Tang
Use builtin_platform_driver() helper to simplify the code. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sparc64:Support User Probes for sparcAllen Pais
Signed-off-by: Eric Saint Etienne <eric.saint.etienne@oracle.com> Signed-off-by: Allen Pais <allen.pais@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11fscrypt: Rename FS_WRITE_PATH_FL to FS_CTX_HAS_BOUNCE_BUFFER_FLDavid Gstir
... to better explain its purpose after introducing in-place encryption without bounce buffer. Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: Delay bounce page pool allocation until neededDavid Gstir
Since fscrypt users can now indicated if fscrypt_encrypt_page() should use a bounce page, we can delay the bounce page pool initialization util it is really needed. That is until fscrypt_operations has no FS_CFLG_OWN_PAGES flag set. Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: Cleanup page locking requirements for fscrypt_{decrypt,encrypt}_page()David Gstir
Rename the FS_CFLG_INPLACE_ENCRYPTION flag to FS_CFLG_OWN_PAGES which, when set, indicates that the fs uses pages under its own control as opposed to writeback pages which require locking and a bounce buffer for encryption. Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: Cleanup fscrypt_{decrypt,encrypt}_page()David Gstir
- Improve documentation - Add BUG_ON(len == 0) to avoid accidental switch of offs and len parameters - Improve variable names for readability Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: Never allocate fscrypt_ctx on in-place encryptionDavid Gstir
In case of in-place encryption fscrypt_ctx was allocated but never released. Since we don't need it for in-place encryption, we skip allocating it. Fixes: 1c7dcf69eea3 ("fscrypt: Add in-place encryption mode") Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: Use correct index in decrypt path.David Gstir
Actually use the fs-provided index instead of always using page->index which is only set for page-cache pages. Fixes: 9c4bb8a3a9b4 ("fscrypt: Let fs select encryption index/tweak") Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypt: move the policy flags and encryption mode definitions to uapi headerTheodore Ts'o
These constants are part of the UAPI, so they belong in include/uapi/linux/fs.h instead of include/linux/fscrypto.h Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Eric Biggers <ebiggers@google.com>
2016-12-11fscrypt: move non-public structures and constants to fscrypt_private.hTheodore Ts'o
Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Eric Biggers <ebiggers@google.com>
2016-12-11fscrypt: unexport fscrypt_initialize()Theodore Ts'o
The fscrypt_initalize() function isn't used outside fs/crypto, so there's no point making it be an exported symbol. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Eric Biggers <ebiggers@google.com>
2016-12-11fscrypt: rename get_crypt_info() to fscrypt_get_crypt_info()Theodore Ts'o
To avoid namespace collisions, rename get_crypt_info() to fscrypt_get_crypt_info(). The function is only used inside the fs/crypto directory, so declare it in the new header file, fscrypt_private.h. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Eric Biggers <ebiggers@google.com>
2016-12-11fscrypto: move ioctl processing more fully into common codeEric Biggers
Multiple bugs were recently fixed in the "set encryption policy" ioctl. To make it clear that fscrypt_process_policy() and fscrypt_get_policy() implement ioctls and therefore their implementations must take standard security and correctness precautions, rename them to fscrypt_ioctl_set_policy() and fscrypt_ioctl_get_policy(). Make the latter take in a struct file * to make it consistent with the former. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11fscrypto: remove unneeded Kconfig dependenciesEric Biggers
SHA256 and ENCRYPTED_KEYS are not needed. CTR shouldn't be needed either, but I left it for now because it was intentionally added by commit 71dea01ea2ed ("ext4 crypto: require CONFIG_CRYPTO_CTR if ext4 encryption is enabled"). So it sounds like there may be a dependency problem elsewhere, which I have not been able to identify specifically, that must be solved before CTR can be removed. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11MAINTAINERS: fscrypto: recommend linux-fsdevel for fscrypto patchesEric Biggers
The filesystem level encryption support, currently used by ext4 and f2fs and proposed for ubifs, does not yet have a dedicated mailing list. Since no mailing lists were specified in MAINTAINERS, get_maintainer.pl only recommended to send patches directly to the maintainers and to linux-kernel. This patch adds linux-fsdevel as the preferred mailing list for fscrypto patches for the time being. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-12-11dma-buf: Extract dma-buf.rstDaniel Vetter
Just prep work to polish and consolidate all the dma-buf related documenation. Unfortunately I didn't discover a way to both integrate this new file into the overall toc while keeping it at the current place. Work around that by moving it into the overall driver-api/index.rst. Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-12-11Linux 4.9v4.9Linus Torvalds
2016-12-11Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS fixes from Ralf Baechle: "Two more MIPS fixes for 4.9: - RTC: Return -ENODEV so an external RTC will be tried - Fix mask of GPE frequency These two have been tested on Imagination's automated test system and also both received positive reviews on the linux-mips mailing list" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Lantiq: Fix mask of GPE frequency MIPS: Return -ENODEV from weak implementation of rtc_mips_set_time
2016-12-11netfilter: nft_counter: rework atomic dump and resetPablo Neira
Dump and reset doesn't work unless cmpxchg64() is used both from packet and control plane paths. This approach is going to be slow though. Instead, use a percpu seqcount to fetch counters consistently, then subtract bytes and packets in case a reset was requested. The cpu that running over the reset code is guaranteed to own this stats exclusively, we have to turn counters into signed 64bit though so stats update on reset don't get wrong on underflow. This patch is based on original sketch from Eric Dumazet. Fixes: 43da04a593d8 ("netfilter: nf_tables: atomic dump and reset for stateful objects") Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-11sched/core: Use load_avg for selecting idlest groupVincent Guittot
find_idlest_group() only compares the runnable_load_avg when looking for the least loaded group. But on fork intensive use case like hackbench where tasks blocked quickly after the fork, this can lead to selecting the same CPU instead of other CPUs, which have similar runnable load but a lower load_avg. When the runnable_load_avg of 2 CPUs are close, we now take into account the amount of blocked load as a 2nd selection factor. There is now 3 zones for the runnable_load of the rq: - [0 .. (runnable_load - imbalance)]: Select the new rq which has significantly less runnable_load - [(runnable_load - imbalance) .. (runnable_load + imbalance)]: The runnable loads are close so we use load_avg to chose between the 2 rq - [(runnable_load + imbalance) .. ULONG_MAX]: Keep the current rq which has significantly less runnable_load The scale factor that is currently used for comparing runnable_load, doesn't work well with small value. As an example, the use of a scaling factor fails as soon as this_runnable_load == 0 because we always select local rq even if min_runnable_load is only 1, which doesn't really make sense because they are just the same. So instead of scaling factor, we use an absolute margin for runnable_load to detect CPUs with similar runnable_load and we keep using scaling factor for blocked load. For use case like hackbench, this enable the scheduler to select different CPUs during the fork sequence and to spread tasks across the system. Tests have been done on a Hikey board (ARM based octo cores) for several kernel. The result below gives min, max, avg and stdev values of 18 runs with each configuration. The patches depend on the "no missing update_rq_clock()" work. hackbench -P -g 1 ea86cb4b7621 7dc603c9028e v4.8 v4.8+patches min 0.049 0.050 0.051 0,048 avg 0.057 0.057(0%) 0.057(0%) 0,055(+5%) max 0.066 0.068 0.070 0,063 stdev +/-9% +/-9% +/-8% +/-9% More performance numbers here: https://lkml.kernel.org/r/20161203214707.GI20785@codeblueprint.co.uk Tested-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Morten.Rasmussen@arm.com Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dietmar.eggemann@arm.com Cc: kernellwp@gmail.com Cc: umgwanakikbuti@gmail.com Cc: yuyang.du@intel.comc Link: http://lkml.kernel.org/r/1481216215-24651-3-git-send-email-vincent.guittot@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11sched/core: Fix find_idlest_group() for forkVincent Guittot
During fork, the utilization of a task is init once the rq has been selected because the current utilization level of the rq is used to set the utilization of the fork task. As the task's utilization is still 0 at this step of the fork sequence, it doesn't make sense to look for some spare capacity that can fit the task's utilization. Furthermore, I can see perf regressions for the test: hackbench -P -g 1 because the least loaded policy is always bypassed and tasks are not spread during fork. With this patch and the fix below, we are back to same performances as for v4.8. The fix below is only a temporary one used for the test until a smarter solution is found because we can't simply remove the test which is useful for others benchmarks | @@ -5708,13 +5708,6 @@ static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, int t | | avg_cost = this_sd->avg_scan_cost; | | - /* | - * Due to large variance we need a large fuzz factor; hackbench in | - * particularly is sensitive here. | - */ | - if ((avg_idle / 512) < avg_cost) | - return -1; | - | time = local_clock(); | | for_each_cpu_wrap(cpu, sched_domain_span(sd), target, wrap) { Tested-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Acked-by: Morten Rasmussen <morten.rasmussen@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dietmar.eggemann@arm.com Cc: kernellwp@gmail.com Cc: umgwanakikbuti@gmail.com Cc: yuyang.du@intel.comc Link: http://lkml.kernel.org/r/1481216215-24651-2-git-send-email-vincent.guittot@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11Merge branch 'linus' into sched/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11x86/paravirt: Fix bool return type for PVOP_CALL()Peter Zijlstra
Commit: 3cded4179481 ("x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted()") introduced a paravirt op with bool return type [*] It turns out that the PVOP_CALL*() macros miscompile when rettype is bool. Code that looked like: 83 ef 01 sub $0x1,%edi ff 15 32 a0 d8 00 callq *0xd8a032(%rip) # ffffffff81e28120 <pv_lock_ops+0x20> 84 c0 test %al,%al ended up looking like so after PVOP_CALL1() was applied: 83 ef 01 sub $0x1,%edi 48 63 ff movslq %edi,%rdi ff 14 25 20 81 e2 81 callq *0xffffffff81e28120 48 85 c0 test %rax,%rax Note how it tests the whole of %rax, even though a typical bool return function only sets %al, like: 0f 95 c0 setne %al c3 retq This is because ____PVOP_CALL() does: __ret = (rettype)__eax; and while regular integer type casts truncate the result, a cast to bool tests for any !0 value. Fix this by explicitly truncating to sizeof(rettype) before casting. [*] The actual bug should've been exposed in commit: 446f3dc8cc0a ("locking/core, x86/paravirt: Implement vcpu_is_preempted(cpu) for KVM and Xen guests") but that didn't properly implement the paravirt call. Reported-by: kernel test robot <xiaolong.ye@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alok Kataria <akataria@vmware.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 3cded4179481 ("x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted()") Link: http://lkml.kernel.org/r/20161208154349.346057680@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11x86/paravirt: Fix native_patch()Peter Zijlstra
While chasing a regression I noticed we potentially patch the wrong code in native_patch(). If we do not select the native code sequence, we must use the default patcher, not fall-through the switch case. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alok Kataria <akataria@vmware.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel test robot <xiaolong.ye@intel.com> Fixes: 3cded4179481 ("x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted()") Link: http://lkml.kernel.org/r/20161208154349.270616999@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11Merge branch 'linus' into locking/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-11perf/x86: Fix exclusion of BTS and LBR for GoldmontAndi Kleen
An earlier patch allowed enabling PT and LBR at the same time on Goldmont. However it also allowed enabling BTS and LBR at the same time, which is still not supported. Fix this by bypassing the check only for PT. Signed-off-by: Andi Kleen <ak@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> Cc: alexander.shishkin@intel.com Cc: kan.liang@intel.com Cc: <stable@vger.kernel.org> Fixes: ccbebba4c6bf ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity if the core supports it") Link: http://lkml.kernel.org/r/20161209001417.4713-1-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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