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* Merge 4.4.202 into android-4.4-pGreg Kroah-Hartman2019-11-16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes in 4.4.202 kvm: mmu: Don't read PDPTEs when paging is not enabled MIPS: BCM63XX: fix switch core reset on BCM6368 powerpc/Makefile: Use cflags-y/aflags-y for setting endian options powerpc: Fix compiling a BE kernel with a powerpc64le toolchain powerpc/boot: Request no dynamic linker for boot wrapper KVM: Introduce kvm_get_arch_capabilities() KVM: x86: Emulate MSR_IA32_ARCH_CAPABILITIES on AMD hosts kvm: x86: IA32_ARCH_CAPABILITIES is always supported KVM: x86: use Intel speculation bugs and features as derived in generic x86 code x86/msr: Add the IA32_TSX_CTRL MSR x86/cpu: Add a helper function x86_read_arch_cap_msr() x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default x86/speculation/taa: Add mitigation for TSX Async Abort x86/speculation/taa: Add sysfs reporting for TSX Async Abort kvm/x86: Export MDS_NO=0 to guests when TSX is enabled x86/tsx: Add "auto" option to the tsx= cmdline parameter x86/speculation/taa: Add documentation for TSX Async Abort x86/tsx: Add config options to set tsx=on|off|auto x86/speculation/taa: Fix printing of TAA_MSG_SMT on IBRS_ALL CPUs x86/bugs: Add ITLB_MULTIHIT bug infrastructure Linux 4.4.202 Change-Id: I0c8187a61060810c9a2e56c09ba17768939de271 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
| * x86/cpu: Add a "tsx=" cmdline option with TSX disabled by defaultPawan Gupta2019-11-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 95c5824f75f3ba4c9e8e5a4b1a623c95390ac266 upstream. Add a kernel cmdline parameter "tsx" to control the Transactional Synchronization Extensions (TSX) feature. On CPUs that support TSX control, use "tsx=on|off" to enable or disable TSX. Not specifying this option is equivalent to "tsx=off". This is because on certain processors TSX may be used as a part of a speculative side channel attack. Carve out the TSX controlling functionality into a separate compilation unit because TSX is a CPU feature while the TSX async abort control machinery will go to cpu/bugs.c. [ bp: - Massage, shorten and clear the arg buffer. - Clarifications of the tsx= possible options - Josh. - Expand on TSX_CTRL availability - Pawan. ] Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> [bwh: Backported to 4.4: - Drop __ro_after_init attribute - Adjust filenames, context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Merge 4.4.141 into android-4.4Greg Kroah-Hartman2018-07-17
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes in 4.4.141 MIPS: Fix ioremap() RAM check ibmasm: don't write out of bounds in read handler vmw_balloon: fix inflation with batching ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS USB: serial: ch341: fix type promotion bug in ch341_control_in() USB: serial: cp210x: add another USB ID for Qivicon ZigBee stick USB: serial: keyspan_pda: fix modem-status error handling USB: yurex: fix out-of-bounds uaccess in read handler USB: serial: mos7840: fix status-register error handling usb: quirks: add delay quirks for Corsair Strafe xhci: xhci-mem: off by one in xhci_stream_id_to_ring() HID: usbhid: add quirk for innomedia INNEX GENESIS/ATARI adapter Fix up non-directory creation in SGID directories tools build: fix # escaping in .cmd files for future Make iw_cxgb4: correctly enforce the max reg_mr depth x86/cpufeature: Move some of the scattered feature bits to x86_capability x86/cpufeature: Cleanup get_cpu_cap() x86/cpu: Provide a config option to disable static_cpu_has x86/fpu: Add an XSTATE_OP() macro x86/fpu: Get rid of xstate_fault() x86/headers: Don't include asm/processor.h in asm/atomic.h x86/cpufeature: Carve out X86_FEATURE_* x86/cpufeature: Replace the old static_cpu_has() with safe variant x86/cpufeature: Get rid of the non-asm goto variant x86/alternatives: Add an auxilary section x86/alternatives: Discard dynamic check after init x86/vdso: Use static_cpu_has() x86/boot: Simplify kernel load address alignment check x86/cpufeature: Speed up cpu_feature_enabled() x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions x86/mm/pkeys: Fix mismerge of protection keys CPUID bits x86/cpu: Add detection of AMD RAS Capabilities x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys x86/cpufeature: Update cpufeaure macros x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated x86/cpufeature: Add helper macro for mask check macros uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn() netfilter: nf_queue: augment nfqa_cfg_policy netfilter: x_tables: initialise match/target check parameter struct loop: add recursion validation to LOOP_CHANGE_FD PM / hibernate: Fix oops at snapshot_write() RDMA/ucm: Mark UCM interface as BROKEN loop: remember whether sysfs_create_group() was done Linux 4.4.141 Change-Id: I777b39a0ede95b58638add97756d6beaf4a9d154 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
| * x86/cpufeature: Carve out X86_FEATURE_*Borislav Petkov2018-07-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit cd4d09ec6f6c12a2cc3db5b7d8876a325a53545b upstream Move them to a separate header and have the following dependency: x86/cpufeatures.h <- x86/processor.h <- x86/cpufeature.h This makes it easier to use the header in asm code and not include the whole cpufeature.h and add guards for asm. Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1453842730-28463-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu> Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com> Reviewed-by: Alexey Makhalov <amakhalov@vmware.com> Reviewed-by: Bo Gan <ganb@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Merge 4.4.112 into android-4.4Greg Kroah-Hartman2018-01-17
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes in 4.4.112 dm bufio: fix shrinker scans when (nr_to_scan < retain_target) KVM: Fix stack-out-of-bounds read in write_mmio can: gs_usb: fix return value of the "set_bittiming" callback IB/srpt: Disable RDMA access by the initiator MIPS: Validate PR_SET_FP_MODE prctl(2) requests against the ABI of the task MIPS: Factor out NT_PRFPREG regset access helpers MIPS: Guard against any partial write attempt with PTRACE_SETREGSET MIPS: Consistently handle buffer counter with PTRACE_SETREGSET MIPS: Fix an FCSR access API regression with NT_PRFPREG and MSA MIPS: Also verify sizeof `elf_fpreg_t' with PTRACE_SETREGSET MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset accesses net/mac80211/debugfs.c: prevent build failure with CONFIG_UBSAN=y kvm: vmx: Scrub hardware GPRs at VM-exit x86/vsdo: Fix build on PARAVIRT_CLOCK=y, KVM_GUEST=n x86/acpi: Handle SCI interrupts above legacy space gracefully iommu/arm-smmu-v3: Don't free page table ops twice ALSA: pcm: Remove incorrect snd_BUG_ON() usages ALSA: pcm: Add missing error checks in OSS emulation plugin builder ALSA: pcm: Abort properly at pending signal in OSS read/write loops ALSA: pcm: Allow aborting mutex lock at OSS read/write loops ALSA: aloop: Release cable upon open error path ALSA: aloop: Fix inconsistent format due to incomplete rule ALSA: aloop: Fix racy hw constraints adjustment x86/acpi: Reduce code duplication in mp_override_legacy_irq() mm/compaction: fix invalid free_pfn and compact_cached_free_pfn mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page mm/page-writeback: fix dirty_ratelimit calculation mm/zswap: use workqueue to destroy pool zswap: don't param_set_charp while holding spinlock locks: don't check for race with close when setting OFD lock futex: Replace barrier() in unqueue_me() with READ_ONCE() locking/mutex: Allow next waiter lockless wakeup usbvision fix overflow of interfaces array usb: musb: ux500: Fix NULL pointer dereference at system PM r8152: fix the wake event r8152: use test_and_clear_bit r8152: adjust ALDPS function lan78xx: use skb_cow_head() to deal with cloned skbs sr9700: use skb_cow_head() to deal with cloned skbs smsc75xx: use skb_cow_head() to deal with cloned skbs cx82310_eth: use skb_cow_head() to deal with cloned skbs x86/mm/pat, /dev/mem: Remove superfluous error message hwrng: core - sleep interruptible in read sysrq: Fix warning in sysrq generated crash. xhci: Fix ring leak in failure path of xhci_alloc_virt_device() Revert "userfaultfd: selftest: vm: allow to build in vm/ directory" x86/pti/efi: broken conversion from efi to kernel page table 8021q: fix a memory leak for VLAN 0 device ip6_tunnel: disable dst caching if tunnel is dual-stack net: core: fix module type in sock_diag_bind RDS: Heap OOB write in rds_message_alloc_sgs() RDS: null pointer dereference in rds_atomic_free_op sh_eth: fix TSU resource handling sh_eth: fix SH7757 GEther initialization net: stmmac: enable EEE in MII, GMII or RGMII only ipv6: fix possible mem leaks in ipv6_make_skb() crypto: algapi - fix NULL dereference in crypto_remove_spawns() rbd: set max_segments to USHRT_MAX x86/microcode/intel: Extend BDW late-loading with a revision check KVM: x86: Add memory barrier on vmcs field lookup drm/vmwgfx: Potential off by one in vmw_view_add() kaiser: Set _PAGE_NX only if supported bpf: add bpf_patch_insn_single helper bpf: don't (ab)use instructions to store state bpf: move fixup_bpf_calls() function bpf: refactor fixup_bpf_calls() bpf: adjust insn_aux_data when patching insns bpf: prevent out-of-bounds speculation bpf, array: fix overflow in max_entries and undefined behavior in index_mask iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK USB: serial: cp210x: add IDs for LifeScan OneTouch Verio IQ USB: serial: cp210x: add new device ID ELV ALC 8xxx usb: misc: usb3503: make sure reset is low for at least 100us USB: fix usbmon BUG trigger usbip: remove kernel addresses from usb device and urb debug msgs staging: android: ashmem: fix a race condition in ASHMEM_SET_SIZE ioctl Bluetooth: Prevent stack info leak from the EFS element. uas: ignore UAS for Norelsys NS1068(X) chips e1000e: Fix e1000_check_for_copper_link_ich8lan return value. x86/Documentation: Add PTI description x86/cpu: Factor out application of forced CPU caps x86/cpufeatures: Make CPU bugs sticky x86/cpufeatures: Add X86_BUG_CPU_INSECURE x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN x86/cpufeatures: Add X86_BUG_SPECTRE_V[12] x86/cpu: Merge bugs.c and bugs_64.c sysfs/cpu: Add vulnerability folder x86/cpu: Implement CPU vulnerabilites sysfs functions sysfs/cpu: Fix typos in vulnerability documentation x86/alternatives: Fix optimize_nops() checking x86/alternatives: Add missing '\n' at end of ALTERNATIVE inline asm selftests/x86: Add test_vsyscall Linux 4.4.112 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
| * x86/cpu: Merge bugs.c and bugs_64.cBorislav Petkov2018-01-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 62a67e123e058a67db58bc6a14354dd037bafd0a upstream. Should be easier when following boot paths. It probably is a left over from the x86 unification eons ago. No functionality change. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161024173844.23038-3-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Razvan Ghitulete <rga@amazon.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | BACKPORT: kernel: add kcov code coverageDmitry Vyukov2017-12-18
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kcov provides code coverage collection for coverage-guided fuzzing (randomized testing). Coverage-guided fuzzing is a testing technique that uses coverage feedback to determine new interesting inputs to a system. A notable user-space example is AFL (http://lcamtuf.coredump.cx/afl/). However, this technique is not widely used for kernel testing due to missing compiler and kernel support. kcov does not aim to collect as much coverage as possible. It aims to collect more or less stable coverage that is function of syscall inputs. To achieve this goal it does not collect coverage in soft/hard interrupts and instrumentation of some inherently non-deterministic or non-interesting parts of kernel is disbled (e.g. scheduler, locking). Currently there is a single coverage collection mode (tracing), but the API anticipates additional collection modes. Initially I also implemented a second mode which exposes coverage in a fixed-size hash table of counters (what Quentin used in his original patch). I've dropped the second mode for simplicity. This patch adds the necessary support on kernel side. The complimentary compiler support was added in gcc revision 231296. We've used this support to build syzkaller system call fuzzer, which has found 90 kernel bugs in just 2 months: https://github.com/google/syzkaller/wiki/Found-Bugs We've also found 30+ bugs in our internal systems with syzkaller. Another (yet unexplored) direction where kcov coverage would greatly help is more traditional "blob mutation". For example, mounting a random blob as a filesystem, or receiving a random blob over wire. Why not gcov. Typical fuzzing loop looks as follows: (1) reset coverage, (2) execute a bit of code, (3) collect coverage, repeat. A typical coverage can be just a dozen of basic blocks (e.g. an invalid input). In such context gcov becomes prohibitively expensive as reset/collect coverage steps depend on total number of basic blocks/edges in program (in case of kernel it is about 2M). Cost of kcov depends only on number of executed basic blocks/edges. On top of that, kernel requires per-thread coverage because there are always background threads and unrelated processes that also produce coverage. With inlined gcov instrumentation per-thread coverage is not possible. kcov exposes kernel PCs and control flow to user-space which is insecure. But debugfs should not be mapped as user accessible. Based on a patch by Quentin Casasnovas. [akpm@linux-foundation.org: make task_struct.kcov_mode have type `enum kcov_mode'] [akpm@linux-foundation.org: unbreak allmodconfig] [akpm@linux-foundation.org: follow x86 Makefile layout standards] Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: syzkaller <syzkaller@googlegroups.com> Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Tavis Ormandy <taviso@google.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Kees Cook <keescook@google.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: David Drysdale <drysdale@google.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Bug: 64145065 (cherry-picked from 5c9a8750a6409c63a0f01d51a9024861022f6593) Change-Id: I17b5e04f6e89b241924e78ec32ead79c38b860ce Signed-off-by: Paul Lawrence <paullawrence@google.com>
* perf/x86: Add Intel cstate PMUs supportKan Liang2015-10-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds new PMUs to support cstate related free running (read-only) counters. These counters may be used simultaneously by other tools, such as turbostat. However, it still make sense to implement them in perf. Because we can conveniently collect them together with other events, and allow to use them from tools without special MSR access code. These counters include CORE_C*_RESIDENCY and PKG_C*_RESIDENCY. According to counters' scope and category, two PMUs are registered with the perf_event core subsystem. - 'cstate_core': The counter is available for each physical core. The counters include CORE_C*_RESIDENCY. - 'cstate_pkg': The counter is available for each physical package. The counters include PKG_C*_RESIDENCY. The events are exposed in sysfs for use by perf stat and other tools. The files are: /sys/devices/cstate_core/events/c*-residency /sys/devices/cstate_pkg/events/c*-residency These events only support system-wide mode counting. The /sys/devices/cstate_*/cpumask file can be used by tools to figure out which CPUs to monitor by default. The PMU type (attr->type) is dynamically allocated and is available from /sys/devices/core_misc/type and /sys/device/cstate_*/type. Sampling is not supported. Here is an example. - To caculate the fraction of time when the core is running in C6 state CORE_C6_time% = CORE_C6_RESIDENCY / TSC # perf stat -x, -e"cstate_core/c6-residency/,msr/tsc/" -C0 -- taskset -c 0 sleep 5 11838820015,,cstate_core/c6-residency/,5175919658,100.00 11877130740,,msr/tsc/,5175922010,100.00 For sleep, 99.7% of time we ran in C6 state. # perf stat -x, -e"cstate_core/c6-residency/,msr/tsc/" -C0 -- taskset -c 0 busyloop 1253316,,cstate_core/c6-residency/,4360969154,100.00 10012635248,,msr/tsc/,4360972366,100.00 For busyloop, 0.01% of time we ran in C6 state. Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.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: eranian@google.com Link: http://lkml.kernel.org/r/1443443404-8581-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86: Add an MSR PMU driverAndy Lutomirski2015-08-04
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an MSR PMU to support free running MSR counters. Such as time and freq related counters includes TSC, IA32_APERF, IA32_MPERF and IA32_PPERF, but also SMI_COUNT. The events are exposed in sysfs for use by perf stat and other tools. The files are under /sys/devices/msr/events/ Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Kan Liang <kan.liang@intel.com> [ s/freq/msr/, added SMI_COUNT, fixed bugs. ] 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: acme@kernel.org Cc: adrian.hunter@intel.com Cc: dsahern@gmail.com Cc: eranian@google.com Cc: jolsa@kernel.org Cc: mark.rutland@arm.com Cc: namhyung@kernel.org Link: http://lkml.kernel.org/r/1437407346-31186-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86/intel/bts: Add BTS PMU driverAlexander Shishkin2015-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for Branch Trace Store (BTS) via kernel perf event infrastructure. The difference with the existing implementation of BTS support is that this one is a separate PMU that exports events' trace buffers to userspace by means of AUX area of the perf buffer, which is zero-copy mapped into userspace. The immediate benefit is that the buffer size can be much bigger, resulting in fewer interrupts and no kernel side copying is involved and little to no trace data loss. Also, kernel code can be traced with this driver. The old way of collecting BTS traces still works. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kaixu Xia <kaixu.xia@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Robert Richter <rric@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@infradead.org Cc: adrian.hunter@intel.com Cc: kan.liang@intel.com Cc: markus.t.metzger@intel.com Cc: mathieu.poirier@linaro.org Link: http://lkml.kernel.org/r/1422614435-114702-1-git-send-email-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86/intel/pt: Add Intel PT PMU driverAlexander Shishkin2015-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for Intel Processor Trace (PT) to kernel's perf events. PT is an extension of Intel Architecture that collects information about software execuction such as control flow, execution modes and timings and formats it into highly compressed binary packets. Even being compressed, these packets are generated at hundreds of megabytes per second per core, which makes it impractical to decode them on the fly in the kernel. This driver exports trace data by through AUX space in the perf ring buffer, which is zero-copy mapped into userspace for faster data retrieval. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kaixu Xia <kaixu.xia@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Robert Richter <rric@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@infradead.org Cc: adrian.hunter@intel.com Cc: kan.liang@intel.com Cc: markus.t.metzger@intel.com Cc: mathieu.poirier@linaro.org Link: http://lkml.kernel.org/r/1422614392-114498-1-git-send-email-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86/intel: Fix Makefile to actually build the cqm driverMatt Fleming2015-03-23
| | | | | | | | | | | | | | | | Someone fat fingered a merge conflict and lost the Makefile hunk. Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <acme@redhat.com> Cc: <hpa@zytor.com> Cc: <jolsa@redhat.com> Cc: <kanaka.d.juvva@intel.com> Cc: <tglx@linutronix.de> Cc: <torvalds@linux-foundation.org> Cc: <vikas.shivappa@linux.intel.com> Link: http://lkml.kernel.org/r/1424976420.15321.35.camel@mfleming-mobl1.ger.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/build: Clean auto-generated processor feature filesBjørn Mork2014-12-23
| | | | | | | | | | | | | | | Commit 9def39be4e96 ("x86: Support compiling out human-friendly processor feature names") made two source file targets conditional. Such conditional targets will not be cleaned automatically by make mrproper. Fix by adding explicit clean-files targets for the two files. Fixes: 9def39be4e96 ("x86: Support compiling out human-friendly processor feature names") Signed-off-by: Bjørn Mork <bjorn@mork.no> Cc: Josh Triplett <josh@joshtriplett.org> Link: http://lkml.kernel.org/r/1419335863-10608-1-git-send-email-bjorn@mork.no Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86: Fix compile warnings for intel_uncorePeter Zijlstra2014-10-28
| | | | | | | | | | | | | | | The uncore drivers require PCI and generate compile time warnings when !CONFIG_PCI. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Stephane Eranian <eranian@google.com> Cc: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2014-10-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "Kernel side updates: - Fix and enhance poll support (Jiri Olsa) - Re-enable inheritance optimization (Jiri Olsa) - Enhance Intel memory events support (Stephane Eranian) - Refactor the Intel uncore driver to be more maintainable (Zheng Yan) - Enhance and fix Intel CPU and uncore PMU drivers (Peter Zijlstra, Andi Kleen) - [ plus various smaller fixes/cleanups ] User visible tooling updates: - Add +field argument support for --field option, so that one can add fields to the default list of fields to show, ie now one can just do: perf report --fields +pid And the pid will appear in addition to the default fields (Jiri Olsa) - Add +field argument support for --sort option (Jiri Olsa) - Honour -w in the report tools (report, top), allowing to specify the widths for the histogram entries columns (Namhyung Kim) - Properly show submicrosecond times in 'perf kvm stat' (Christian Borntraeger) - Add beautifier for mremap flags param in 'trace' (Alex Snast) - perf script: Allow callchains if any event samples them - Don't truncate Intel style addresses in 'annotate' (Alex Converse) - Allow profiling when kptr_restrict == 1 for non root users, kernel samples will just remain unresolved (Andi Kleen) - Allow configuring default options for callchains in config file (Namhyung Kim) - Support operations for shared futexes. (Davidlohr Bueso) - "perf kvm stat report" improvements by Alexander Yarygin: - Save pid string in opts.target.pid - Enable the target.system_wide flag - Unify the title bar output - [ plus lots of other fixes and small improvements. ] Tooling infrastructure changes: - Refactor unit and scale function parameters for PMU parsing routines (Matt Fleming) - Improve DSO long names lookup with rbtree, resulting in great speedup for workloads with lots of DSOs (Waiman Long) - We were not handling POLLHUP notifications for event file descriptors Fix it by filtering entries in the events file descriptor array after poll() returns, refcounting mmaps so that when the last fd pointing to a perf mmap goes away we do the unmap (Arnaldo Carvalho de Melo) - Intel PT prep work, from Adrian Hunter, including: - Let a user specify a PMU event without any config terms - Add perf-with-kcore script - Let default config be defined for a PMU - Add perf_pmu__scan_file() - Add a 'perf test' for tracking with sched_switch - Add 'flush' callback to scripting API - Use ring buffer consume method to look like other tools (Arnaldo Carvalho de Melo) - hists browser (used in top and report) refactorings, getting rid of unused variables and reducing source code size by handling similar cases in a fewer functions (Namhyung Kim). - Replace thread unsafe strerror() with strerror_r() accross the whole tools/perf/ tree (Masami Hiramatsu) - Rename ordered_samples to ordered_events and allow setting a queue size for ordering events (Jiri Olsa) - [ plus lots of fixes, cleanups and other improvements ]" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (198 commits) perf/x86: Tone down kernel messages when the PMU check fails in a virtual environment perf/x86/intel/uncore: Fix minor race in box set up perf record: Fix error message for --filter option not coming after tracepoint perf tools: Fix build breakage on arm64 targets perf symbols: Improve DSO long names lookup speed with rbtree perf symbols: Encapsulate dsos list head into struct dsos perf bench futex: Sanitize -q option in requeue perf bench futex: Support operations for shared futexes perf trace: Fix mmap return address truncation to 32-bit perf tools: Refactor unit and scale function parameters perf tools: Fix line number in the config file error message perf tools: Convert {record,top}.call-graph option to call-graph.record-mode perf tools: Introduce perf_callchain_config() perf callchain: Move some parser functions to callchain.c perf tools: Move callchain config from record_opts to callchain_param perf hists browser: Fix callchain print bug on TUI perf tools: Use ACCESS_ONCE() instead of volatile cast perf tools: Modify error code for when perf_session__new() fails perf tools: Fix perf record as non root with kptr_restrict == 1 perf stat: Fix --per-core on multi socket systems ...
| * perf/x86/uncore: move NHM-EX/WSM-EX specific code to seperate fileYan, Zheng2014-08-13
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Borislav Petkov <bp@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1406704935-27708-4-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * perf/x86/uncore: Move SNB/IVB-EP specific code to seperate fileYan, Zheng2014-08-13
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Borislav Petkov <bp@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1406704935-27708-3-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * perf/x86/uncore: Move NHM/SNB/IVB specific code to seperate fileYan, Zheng2014-08-13
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Borislav Petkov <bp@suse.de> Cc: Stephane Eranian <eranian@google.com> Cc: eranian@google.com Link: http://lkml.kernel.org/r/1406704935-27708-2-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | x86: Support compiling out human-friendly processor feature namesJosh Triplett2014-08-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The table mapping CPUID bits to human-readable strings takes up a non-trivial amount of space, and only exists to support /proc/cpuinfo and a couple of kernel messages. Since programs depend on the format of /proc/cpuinfo, force inclusion of the table when building with /proc support; otherwise, support omitting that table to save space, in which case the kernel messages will print features numerically instead. In addition to saving 1408 bytes out of vmlinux, this also saves 1373 bytes out of the uncompressed setup code, which contributes directly to the size of bzImage. Signed-off-by: Josh Triplett <josh@joshtriplett.org>
* | x86: Drop support for /proc files when !CONFIG_PROC_FSJosh Triplett2014-08-17
|/ | | | | | | | | | | | | | | | | arch/x86/kernel/cpu/proc.c only exists to support files in /proc; omit that file when compiling without CONFIG_PROC_FS. Saves 645 additional bytes on 32-bit x86 when !CONFIG_PROC_FS: add/remove: 0/5 grow/shrink: 0/0 up/down: 0/-645 (-645) function old new delta c_stop 1 - -1 c_next 11 - -11 cpuinfo_op 16 - -16 c_start 24 - -24 show_cpuinfo 593 - -593 Signed-off-by: Josh Triplett <josh@joshtriplett.org>
* Merge branch 'x86-microcode-for-linus' of ↵Linus Torvalds2014-01-20
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 microcode loader updates from Ingo Molnar: "There are two main changes in this tree: - AMD microcode early loading fixes - some microcode loader source files reorganization" * 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, microcode: Move to a proper location x86, microcode, AMD: Fix early ucode loading x86, microcode: Share native MSR accessing variants x86, ramdisk: Export relocated ramdisk VA
| * x86, microcode: Move to a proper locationBorislav Petkov2014-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | We've grown a bunch of microcode loader files all prefixed with "microcode_". They should be under cpu/ because this is strictly CPU-related functionality so do that and drop the prefix since they're in their own directory now which gives that prefix. :) While at it, drop MICROCODE_INTEL_LIB config item and stash the functionality under CONFIG_MICROCODE_INTEL as it was its only user. Signed-off-by: Borislav Petkov <bp@suse.de> Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
* | perf/x86: Add Intel RAPL PMU supportStephane Eranian2013-11-27
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a new uncore PMU to expose the Intel RAPL energy consumption counters. Up to 3 counters, each counting a particular RAPL event are exposed. The RAPL counters are available on Intel SandyBridge, IvyBridge, Haswell. The server skus add a 3rd counter. The following events are available and exposed in sysfs: - power/energy-cores: power consumption of all cores on socket - power/energy-pkg: power consumption of all cores + LLc cache - power/energy-dram: power consumption of DRAM (servers only) For each event both the unit (Joules) and scale (2^-32 J) is exposed in sysfs for use by perf stat and other tools. The files are: /sys/devices/power/events/energy-*.unit /sys/devices/power/events/energy-*.scale The RAPL PMU is uncore by nature and is implemented such that it only works in system-wide mode. Measuring only one CPU per socket is sufficient. The /sys/devices/power/cpumask file can be used by tools to figure out which CPUs to monitor by default. For instance, on a 2-socket system, 2 CPUs (one on each socket) will be shown. All the counters measure in the same unit (exposed via sysfs). The perf_events API exposes all RAPL counters as 64-bit integers counting in unit of 1/2^32 Joules (about 0.23 nJ). User level tools must convert the counts by multiplying them by 2^-32 to obtain Joules. The reason for this is that the kernel avoids doing floating point math whenever possible because it is expensive (user floating-point state must be saved). The method used avoids kernel floating-point usage. There is no loss of precision. Thanks to PeterZ for suggesting this approach. To convert the raw count in Watt: W = C * 2.3 / (1e10 * time) or ldexp(C, -32). RAPL PMU is a new standalone PMU which registers with the perf_event core subsystem. The PMU type (attr->type) is dynamically allocated and is available from /sys/device/power/type. Sampling is not supported by the RAPL PMU. There is no privilege level filtering either. Signed-off-by: Stephane Eranian <eranian@google.com> Reviewed-by: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: acme@redhat.com Cc: jolsa@redhat.com Cc: zheng.z.yan@intel.com Cc: bp@alien8.de Link: http://lkml.kernel.org/r/1384275531-10892-4-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementationSuravee Suthikulpanit2013-06-19
| | | | | | | | | | | | | | | | | | | | | | | | | | Implement a perf PMU to handle IOMMU performance counters and events. The PMU only supports counting mode (e.g. perf stat). Since the counters are shared across all cores, the PMU is implemented as "system-wide" mode. To invoke the AMD IOMMU PMU, issue a perf tool command such as: ./perf stat -a -e amd_iommu/<events>/ <command> or: ./perf stat -a -e amd_iommu/config=<config-data>,config1=<config1-data>/ <command> For example: ./perf stat -a -e amd_iommu/mem_trans_total/ <command> The resulting count will be how many IOMMU total peripheral memory operations were performed during the command execution window. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1370466709-3212-3-git-send-email-suravee.suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge branch 'x86-paravirt-for-linus' of ↵Linus Torvalds2013-04-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 paravirt update from Ingo Molnar: "Various paravirtualization related changes - the biggest one makes guest support optional via CONFIG_HYPERVISOR_GUEST" * 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, wakeup, sleep: Use pvops functions for changing GDT entries x86, xen, gdt: Remove the pvops variant of store_gdt. x86-32, gdt: Store/load GDT for ACPI S3 or hibernation/resume path is not needed x86-64, gdt: Store/load GDT for ACPI S3 or hibernate/resume path is not needed. x86: Make Linux guest support optional x86, Kconfig: Move PARAVIRT_DEBUG into the paravirt menu
| * x86: Make Linux guest support optionalBorislav Petkov2013-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Put all config options needed to run Linux as a guest behind a CONFIG_HYPERVISOR_GUEST menu so that they don't get built-in by default but be selectable by the user. Also, make all units which depend on x86_hyper, depend on this new symbol so that compilation doesn't fail when CONFIG_HYPERVISOR_GUEST is disabled but those units assume its presence. Sort options in the new HYPERVISOR_GUEST menu, adapt config text and drop redundant select. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1362428421-9244-3-git-send-email-bp@alien8.de Cc: Dmitry Torokhov <dtor@vmware.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* | Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2013-04-30
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "Features: - Add "uretprobes" - an optimization to uprobes, like kretprobes are an optimization to kprobes. "perf probe -x file sym%return" now works like kretprobes. By Oleg Nesterov. - Introduce per core aggregation in 'perf stat', from Stephane Eranian. - Add memory profiling via PEBS, from Stephane Eranian. - Event group view for 'annotate' in --stdio, --tui and --gtk, from Namhyung Kim. - Add support for AMD NB and L2I "uncore" counters, by Jacob Shin. - Add Ivy Bridge-EP uncore support, by Zheng Yan - IBM zEnterprise EC12 oprofile support patchlet from Robert Richter. - Add perf test entries for checking breakpoint overflow signal handler issues, from Jiri Olsa. - Add perf test entry for for checking number of EXIT events, from Namhyung Kim. - Add perf test entries for checking --cpu in record and stat, from Jiri Olsa. - Introduce perf stat --repeat forever, from Frederik Deweerdt. - Add --no-demangle to report/top, from Namhyung Kim. - PowerPC fixes plus a couple of cleanups/optimizations in uprobes and trace_uprobes, by Oleg Nesterov. Various fixes and refactorings: - Fix dependency of the python binding wrt libtraceevent, from Naohiro Aota. - Simplify some perf_evlist methods and to allow 'stat' to share code with 'record' and 'trace', by Arnaldo Carvalho de Melo. - Remove dead code in related to libtraceevent integration, from Namhyung Kim. - Revert "perf sched: Handle PERF_RECORD_EXIT events" to get 'perf sched lat' back working, by Arnaldo Carvalho de Melo - We don't use Newt anymore, just plain libslang, by Arnaldo Carvalho de Melo. - Kill a bunch of die() calls, from Namhyung Kim. - Fix build on non-glibc systems due to libio.h absence, from Cody P Schafer. - Remove some perf_session and tracing dead code, from David Ahern. - Honor parallel jobs, fix from Borislav Petkov - Introduce tools/lib/lk library, initially just removing duplication among tools/perf and tools/vm. from Borislav Petkov ... and many more I missed to list, see the shortlog and git log for more details." * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (136 commits) perf/x86/intel/P4: Robistify P4 PMU types perf/x86/amd: Fix AMD NB and L2I "uncore" support perf/x86/amd: Remove old-style NB counter support from perf_event_amd.c perf/x86: Check all MSRs before passing hw check perf/x86/amd: Add support for AMD NB and L2I "uncore" counters perf/x86/intel: Add Ivy Bridge-EP uncore support perf/x86/intel: Fix SNB-EP CBO and PCU uncore PMU filter management perf/x86: Avoid kfree() in CPU_{STARTING,DYING} uprobes/perf: Avoid perf_trace_buf_prepare/submit if ->perf_events is empty uprobes/tracing: Don't pass addr=ip to perf_trace_buf_submit() uprobes/tracing: Change create_trace_uprobe() to support uretprobes uprobes/tracing: Make seq_printf() code uretprobe-friendly uprobes/tracing: Make register_uprobe_event() paths uretprobe-friendly uprobes/tracing: Make uprobe_{trace,perf}_print() uretprobe-friendly uprobes/tracing: Introduce is_ret_probe() and uretprobe_dispatcher() uprobes/tracing: Introduce uprobe_{trace,perf}_print() helpers uprobes/tracing: Generalize struct uprobe_trace_entry_head uprobes/tracing: Kill the pointless local_save_flags/preempt_count calls uprobes/tracing: Kill the pointless seq_print_ip_sym() call uprobes/tracing: Kill the pointless task_pt_regs() calls ...
| * | perf/x86/amd: Add support for AMD NB and L2I "uncore" countersJacob Shin2013-04-21
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for AMD Family 15h [and above] northbridge performance counters. MSRs 0xc0010240 ~ 0xc0010247 are shared across all cores that share a common northbridge. Add support for AMD Family 16h L2 performance counters. MSRs 0xc0010230 ~ 0xc0010237 are shared across all cores that share a common L2 cache. We do not enable counter overflow interrupts. Sampling mode and per-thread events are not supported. Signed-off-by: Jacob Shin <jacob.shin@amd.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Stephane Eranian <eranian@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20130419213428.GA8229@jshin-Toonie Signed-off-by: Ingo Molnar <mingo@kernel.org>
* / mkcapflags.pl: convert to mkcapflags.shRob Landley2013-04-29
|/ | | | | | | | | | | | | | Generate asm-x86/cpufeature.h with posix-2008 commands instead of perl. Signed-off-by: Rob Landley <rob@landley.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Josh Boyer <jwboyer@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: David Howells <dhowell@redhat.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* perf/x86: Add support for Intel Xeon-Phi Knights Corner PMUVince Weaver2012-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch adds perf_event support for the Xeon-Phi PMU, as documented in the "Intel Xeon Phi Coprocessor (codename: Knights Corner) Performance Monitoring Units" manual. Even though it is a co-processor, a Phi runs a full Linux environment and can support performance counters. This is just barebones support, it does not add support for interesting new features such as the SPFLT intruction that allows starting/stopping events without entering the kernel. The PMU internally is just like that of an original Pentium, but a "P6-like" MSR interface is provided. The interface is different enough from a real P6 that it's not easy (or practical) to re-use the code in perf_event_p6.c Acked-by: Lawrence F Meadows <lawrence.f.meadows@intel.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: eranian@gmail.com Cc: Lawrence F <lawrence.f.meadows@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1209261405320.8398@vincent-weaver-1.um.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge branch 'sched-core-for-linus' of ↵Linus Torvalds2012-07-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "The biggest change is a performance improvement on SMP systems: | 4 socket 40 core + SMT Westmere box, single 30 sec tbench | runs, higher is better: | | clients 1 2 4 8 16 32 64 128 |.......................................................................... | pre 30 41 118 645 3769 6214 12233 14312 | post 299 603 1211 2418 4697 6847 11606 14557 | | A nice increase in performance. which speedup is particularly noticeable on heavily interacting few-tasks workloads, so the changes should help desktop-style Xorg workloads and interactivity as well, on multi-core CPUs. There are also cpuset suspend behavior fixes/restructuring and various smaller tweaks." * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Fix race in task_group() sched: Improve balance_cpu() to consider other cpus in its group as target of (pinned) task sched: Reset loop counters if all tasks are pinned and we need to redo load balance sched: Reorder 'struct lb_env' members to reduce its size sched: Improve scalability via 'CPU buddies', which withstand random perturbations cpusets: Remove/update outdated comments cpusets, hotplug: Restructure functions that are invoked during hotplug cpusets, hotplug: Implement cpuset tree traversal in a helper function CPU hotplug, cpusets, suspend: Don't modify cpusets during suspend/resume sched/x86: Remove broken power estimation
| * sched/x86: Remove broken power estimationPeter Zijlstra2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The x86 sched power implementation has been broken forever and gets in the way of other stuff, remove it. [ For archaeological interest, fixing this code would require dealing with the cross-cpu calling of these functions and more importantly, we need to filter idle time out of the a/m-perf stuff because the ratio will go down to 0 when idle, giving a 0 capacity which is not what we'd want. ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Link: http://lkml.kernel.org/r/1339594110.8980.38.camel@twins Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | perf/x86: Add generic Intel uncore PMU supportYan, Zheng2012-06-18
|/ | | | | | | | | | | | | | | | | | | | | This patch adds the generic Intel uncore PMU support, including helper functions that add/delete uncore events, a hrtimer that periodically polls the counters to avoid overflow and code that places all events for a particular socket onto a single cpu. The code design is based on the structure of Sandy Bridge-EP's uncore subsystem, which consists of a variety of components, each component contains one or more "boxes". (Tooling support follows in the next patches.) Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1339741902-8449-6-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Add driver auto probing for x86 features v4Andi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a growing number of drivers that support a specific x86 feature or CPU. Currently loading these drivers currently on a generic distribution requires various driver specific hacks and it often doesn't work. This patch adds auto probing for drivers based on the x86 cpuid information, in particular based on vendor/family/model number and also based on CPUID feature bits. For example a common issue is not loading the SSE 4.2 accelerated CRC module: this can significantly lower the performance of BTRFS which relies on fast CRC. Another issue is loading the right CPUFREQ driver for the current CPU. Currently distributions often try all all possible driver until one sticks, which is not really a good way to do this. It works with existing udev without any changes. The code exports the x86 information as a generic string in sysfs that can be matched by udev's pattern matching. This scheme does not support numeric ranges, so if you want to handle e.g. ranges of model numbers they have to be encoded in ASCII or simply all models or families listed. Fixing that would require changing udev. Another issue is that udev will happily load all drivers that match, there is currently no nice way to stop a specific driver from being loaded if it's not needed (e.g. if you don't need fast CRC) But there are not that many cpu specific drivers around and they're all not that bloated, so this isn't a particularly serious issue. Originally this patch added the modalias to the normal cpu sysdevs. However sysdevs don't have all the infrastructure needed for udev, so it couldn't really autoload drivers. This patch instead adds the CPU modaliases to the cpuid devices, which are real devices with full support for udev. This implies that the cpuid driver has to be loaded to use this. This patch just adds infrastructure, some driver conversions in followups. Thanks to Kay for helping with some sysfs magic. v2: Constifcation, some updates v4: (trenn@suse.de): - Use kzalloc instead of kmalloc to terminate modalias buffer - Use uppercase hex values to match correctly against hex values containing letters Cc: Dave Jones <davej@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Jen Axboe <axboe@kernel.dk> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Huang Ying <ying.huang@intel.com> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge branch 'x86-rdrand-for-linus' of ↵Linus Torvalds2011-10-28
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-rdrand-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, random: Verify RDRAND functionality and allow it to be disabled x86, random: Architectural inlines to get random integers with RDRAND random: Add support for architectural random hooks Fix up trivial conflicts in drivers/char/random.c: the architectural random hooks touched "get_random_int()" that was simplified to use MD5 and not do the keyptr thing any more (see commit 6e5714eaf77d: "net: Compute protocol sequence numbers and fragment IDs using MD5").
| * x86, random: Verify RDRAND functionality and allow it to be disabledH. Peter Anvin2011-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the CPU declares that RDRAND is available, go through a guranteed reseed sequence, and make sure that it is actually working (producing data.) If it does not, disable the CPU feature flag. Allow RDRAND to be disabled on the command line (as opposed to at compile time) for a user who has special requirements with regards to random numbers. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Matt Mackall <mpm@selenic.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "Theodore Ts'o" <tytso@mit.edu>
* | perf, x86: Implement IBS initializationRobert Richter2011-10-10
| | | | | | | | | | | | | | | | | | | | | | This patch implements IBS feature detection and initialzation. The code is shared between perf and oprofile. If IBS is available on the system for perf, a pmu is setup. Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1316597423-25723-3-git-send-email-robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86, perf: Clean up perf_event cpu codeKevin Winchester2011-09-26
|/ | | | | | | | | | | The CPU support for perf events on x86 was implemented via included C files with #ifdefs. Clean this up by creating a new header file and compiling the vendor-specific files as needed. Signed-off-by: Kevin Winchester <kjwinchester@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1314747665-2090-1-git-send-email-kjwinchester@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [CPUFREQ] Move x86 drivers to drivers/cpufreq/Dave Jones2011-05-19
| | | | Signed-off-by: Dave Jones <davej@redhat.com>
* Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds2010-08-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: um, x86: Cast to (u64 *) inside set_64bit() x86-32, asm: Directly access per-cpu GDT x86-64, asm: Directly access per-cpu IST x86, asm: Merge cmpxchg_486_u64() and cmpxchg8b_emu() x86, asm: Move cmpxchg emulation code to arch/x86/lib x86, asm: Clean up and simplify <asm/cmpxchg.h> x86, asm: Clean up and simplify set_64bit() x86: Add memory modify constraints to xchg() and cmpxchg() x86-64: Simplify loading initial_gs x86: Use symbolic MSR names x86: Remove redundant K6 MSRs
| * x86, asm: Move cmpxchg emulation code to arch/x86/libH. Peter Anvin2010-07-28
| | | | | | | | | | | | | | | | | | Move cmpxchg emulation code from arch/x86/kernel/cpu (which is otherwise CPU identification) to arch/x86/lib, where other emulation code lives already. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> LKML-Reference: <AANLkTikAmaDPji-TVDarmG1yD=fwbffcsmEU=YEuP+8r@mail.gmail.com>
* | x86, cpu: Split addon_cpuid_features.cH. Peter Anvin2010-07-19
|/ | | | | | | | | | addon_cpuid_features.c contains exactly two almost completely unrelated functions, plus has a long and very generic name. Split it into two files, scattered.c for the scattered feature flags, and topology.c for the topology information. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> LKML-Reference: <tip-*@git.kernel.org>
* x86: Detect running on a Microsoft HyperV systemKy Srinivasan2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch integrates HyperV detection within the framework currently used by VmWare. With this patch, we can avoid having to replicate the HyperV detection code in each of the Microsoft HyperV drivers. Reworked and tweaked by Greg K-H to build properly. Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com> LKML-Reference: <20100506190841.GA1605@kroah.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Vadim Rozenfeld <vrozenfe@redhat.com> Cc: Avi Kivity <avi@redhat.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "K.Prasad" <prasad@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Alan Cox <alan@linux.intel.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG)H. Peter Anvin2010-01-23
| | | | | | | | | | | | | | | | | | | | | CONFIG_X86_CPU_DEBUG, which provides some parsed versions of the x86 CPU configuration via debugfs, has caused boot failures on real hardware. The value of this feature has been marginal at best, as all this information is already available to userspace via generic interfaces. Causes crashes that have not been fixed + minimal utility -> remove. See the referenced LKML thread for more information. Reported-by: Ozan Çağlayan <ozan@pardus.org.tr> Signed-off-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <alpine.LFD.2.00.1001221755320.13231@localhost.localdomain> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Yinghai Lu <yinghai@kernel.org> Cc: <stable@kernel.org>
* perf events: Do not generate function trace entries in perf codeIngo Molnar2009-11-23
| | | | | | | | | | | | | Decreases perf overhead when function tracing is enabled, by about 50%. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar2009-09-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: sched: Provide arch implementations using aperf/mperfPeter Zijlstra2009-09-15
| | | | | | | | | | | | | | | | | | APERF/MPERF support for cpu_power. APERF/MPERF is arch defined to be a relative scale of work capacity per logical cpu, this is assumed to include SMT and Turbo mode. APERF/MPERF are specified to both reset to 0 when either counter wraps, which is highly inconvenient, since that'll give a blimp when that happens. The manual specifies writing 0 to the counters after each read, but that's 1) too expensive, and 2) destroys the possibility of sharing these counters with other users, so we live with the blimp - the other existing user does too. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'bugfix' of ↵Ingo Molnar2009-08-20
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen into x86/urgent
| * x86: make sure load_percpu_segment has no stackprotectorJeremy Fitzhardinge2009-08-19
| | | | | | | | | | | | | | | | | | | | load_percpu_segment() is used to set up the per-cpu segment registers, which are also used for -fstack-protector. Make sure that the load_percpu_segment() function doesn't have stackprotector enabled. [ Impact: allow percpu setup before calling stack-protected functions ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* | Merge branch 'linus' into perfcounters/core-v2Ingo Molnar2009-04-06
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: we have gathered quite a few conflicts, need to merge upstream Conflicts: arch/powerpc/kernel/Makefile arch/x86/ia32/ia32entry.S arch/x86/include/asm/hardirq.h arch/x86/include/asm/unistd_32.h arch/x86/include/asm/unistd_64.h arch/x86/kernel/cpu/common.c arch/x86/kernel/irq.c arch/x86/kernel/syscall_table_32.S arch/x86/mm/iomap_32.c include/linux/sched.h kernel/Makefile Signed-off-by: Ingo Molnar <mingo@elte.hu>
generated by cgit v1.2.3 (git 2.25.1) at 2026-03-14 02:59:08 +0000