mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
perf/urgent fixes:
core:
Arnaldo Carvalho de Melo:
- Allow references to thread objects after__machine_exit(), fixing a bug with
'perf sched lat' where that happens, i.e. after perf_session__delete() we
still have references to threads that were in a linked list whose head was
freed in perf_session__delete(), causing a segfault, fix it.
Jiri Olsa:
- Do not rely on errno values for precise_ip fallback, fixing the default
use case for 'perf record' on some AMD servers, when no events are specified
and we try to use "cycles:P", i.e. with the maximum precision level.
BPF:
Song Liu:
- Assign proper ff->ph in perf_event__synthesize_features(), fixing a bug
when using pipe mode, i.e. 'perf record -o -'.
tools headers:
Arnaldo Carvalho de Melo:
- Sync kvm headers with the kernel sources
perf tests:
Seeteena Thoufeek:
- Fix record+probe_libc_inet_pton.sh for powerpc64, where without the
debuginfo package for the 'ping' utility we can't resolve its symbols,
so admit getting "[unknown]" for that backtrace line.
perf python:
Arnaldo Carvalho de Melo:
- Remove -fstack-protector-strong if clang doesn't have it, fixing the build
with clang on fedora:30, oracleline:7, centos:7.
perf jvmti:
Jiri Olsa:
- Address gcc string overflow warning for strncpy()
build:
Arnaldo Carvalho de Melo:
- Check if gettid() is available before providing helper, as recent
versions of glibc started to provide gettid().
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCXSO5bQAKCRCyPKLppCJ+
J5QdAP9RYkXC7b5FoJ2p0ZpDraDETHktYf1tXcQm1ViwtBoGJQD+JjW61UIJpO8J
M4qeyCa6lYuxeualIH+aJA0+IQhilAs=
=WRXE
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-for-mingo-5.3-20190708-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
core:
Arnaldo Carvalho de Melo:
- Allow references to thread objects after__machine_exit(), fixing a bug with
'perf sched lat' where that happens, i.e. after perf_session__delete() we
still have references to threads that were in a linked list whose head was
freed in perf_session__delete(), causing a segfault, fix it.
Jiri Olsa:
- Do not rely on errno values for precise_ip fallback, fixing the default
use case for 'perf record' on some AMD servers, when no events are specified
and we try to use "cycles:P", i.e. with the maximum precision level.
BPF:
Song Liu:
- Assign proper ff->ph in perf_event__synthesize_features(), fixing a bug
when using pipe mode, i.e. 'perf record -o -'.
tools headers:
Arnaldo Carvalho de Melo:
- Sync kvm headers with the kernel sources
perf tests:
Seeteena Thoufeek:
- Fix record+probe_libc_inet_pton.sh for powerpc64, where without the
debuginfo package for the 'ping' utility we can't resolve its symbols,
so admit getting "[unknown]" for that backtrace line.
perf python:
Arnaldo Carvalho de Melo:
- Remove -fstack-protector-strong if clang doesn't have it, fixing the build
with clang on fedora:30, oracleline:7, centos:7.
perf jvmti:
Jiri Olsa:
- Address gcc string overflow warning for strncpy()
build:
Arnaldo Carvalho de Melo:
- Check if gettid() is available before providing helper, as recent
versions of glibc started to provide gettid().
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
commit
d1d59b8179
@ -260,6 +260,13 @@ struct kvm_vcpu_events {
|
||||
KVM_REG_SIZE_U256 | \
|
||||
((i) & (KVM_ARM64_SVE_MAX_SLICES - 1)))
|
||||
|
||||
/*
|
||||
* Register values for KVM_REG_ARM64_SVE_ZREG(), KVM_REG_ARM64_SVE_PREG() and
|
||||
* KVM_REG_ARM64_SVE_FFR() are represented in memory in an endianness-
|
||||
* invariant layout which differs from the layout used for the FPSIMD
|
||||
* V-registers on big-endian systems: see sigcontext.h for more explanation.
|
||||
*/
|
||||
|
||||
#define KVM_ARM64_SVE_VQ_MIN __SVE_VQ_MIN
|
||||
#define KVM_ARM64_SVE_VQ_MAX __SVE_VQ_MAX
|
||||
|
||||
|
||||
@ -239,12 +239,14 @@
|
||||
#define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */
|
||||
#define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */
|
||||
#define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */
|
||||
#define X86_FEATURE_FDP_EXCPTN_ONLY ( 9*32+ 6) /* "" FPU data pointer updated only on x87 exceptions */
|
||||
#define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */
|
||||
#define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */
|
||||
#define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB instructions */
|
||||
#define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */
|
||||
#define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */
|
||||
#define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */
|
||||
#define X86_FEATURE_ZERO_FCS_FDS ( 9*32+13) /* "" Zero out FPU CS and FPU DS */
|
||||
#define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */
|
||||
#define X86_FEATURE_RDT_A ( 9*32+15) /* Resource Director Technology Allocation */
|
||||
#define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */
|
||||
@ -269,13 +271,19 @@
|
||||
#define X86_FEATURE_XGETBV1 (10*32+ 2) /* XGETBV with ECX = 1 instruction */
|
||||
#define X86_FEATURE_XSAVES (10*32+ 3) /* XSAVES/XRSTORS instructions */
|
||||
|
||||
/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:0 (EDX), word 11 */
|
||||
#define X86_FEATURE_CQM_LLC (11*32+ 1) /* LLC QoS if 1 */
|
||||
/*
|
||||
* Extended auxiliary flags: Linux defined - for features scattered in various
|
||||
* CPUID levels like 0xf, etc.
|
||||
*
|
||||
* Reuse free bits when adding new feature flags!
|
||||
*/
|
||||
#define X86_FEATURE_CQM_LLC (11*32+ 0) /* LLC QoS if 1 */
|
||||
#define X86_FEATURE_CQM_OCCUP_LLC (11*32+ 1) /* LLC occupancy monitoring */
|
||||
#define X86_FEATURE_CQM_MBM_TOTAL (11*32+ 2) /* LLC Total MBM monitoring */
|
||||
#define X86_FEATURE_CQM_MBM_LOCAL (11*32+ 3) /* LLC Local MBM monitoring */
|
||||
|
||||
/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:1 (EDX), word 12 */
|
||||
#define X86_FEATURE_CQM_OCCUP_LLC (12*32+ 0) /* LLC occupancy monitoring */
|
||||
#define X86_FEATURE_CQM_MBM_TOTAL (12*32+ 1) /* LLC Total MBM monitoring */
|
||||
#define X86_FEATURE_CQM_MBM_LOCAL (12*32+ 2) /* LLC Local MBM monitoring */
|
||||
/* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
|
||||
#define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* AVX512 BFLOAT16 instructions */
|
||||
|
||||
/* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */
|
||||
#define X86_FEATURE_CLZERO (13*32+ 0) /* CLZERO instruction */
|
||||
@ -322,6 +330,7 @@
|
||||
#define X86_FEATURE_UMIP (16*32+ 2) /* User Mode Instruction Protection */
|
||||
#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
|
||||
#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
|
||||
#define X86_FEATURE_WAITPKG (16*32+ 5) /* UMONITOR/UMWAIT/TPAUSE Instructions */
|
||||
#define X86_FEATURE_AVX512_VBMI2 (16*32+ 6) /* Additional AVX512 Vector Bit Manipulation Instructions */
|
||||
#define X86_FEATURE_GFNI (16*32+ 8) /* Galois Field New Instructions */
|
||||
#define X86_FEATURE_VAES (16*32+ 9) /* Vector AES */
|
||||
|
||||
@ -383,6 +383,9 @@ struct kvm_sync_regs {
|
||||
#define KVM_X86_QUIRK_LAPIC_MMIO_HOLE (1 << 2)
|
||||
#define KVM_X86_QUIRK_OUT_7E_INC_RIP (1 << 3)
|
||||
|
||||
#define KVM_STATE_NESTED_FORMAT_VMX 0
|
||||
#define KVM_STATE_NESTED_FORMAT_SVM 1 /* unused */
|
||||
|
||||
#define KVM_STATE_NESTED_GUEST_MODE 0x00000001
|
||||
#define KVM_STATE_NESTED_RUN_PENDING 0x00000002
|
||||
#define KVM_STATE_NESTED_EVMCS 0x00000004
|
||||
@ -390,7 +393,14 @@ struct kvm_sync_regs {
|
||||
#define KVM_STATE_NESTED_SMM_GUEST_MODE 0x00000001
|
||||
#define KVM_STATE_NESTED_SMM_VMXON 0x00000002
|
||||
|
||||
struct kvm_vmx_nested_state {
|
||||
#define KVM_STATE_NESTED_VMX_VMCS_SIZE 0x1000
|
||||
|
||||
struct kvm_vmx_nested_state_data {
|
||||
__u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
|
||||
__u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
|
||||
};
|
||||
|
||||
struct kvm_vmx_nested_state_hdr {
|
||||
__u64 vmxon_pa;
|
||||
__u64 vmcs12_pa;
|
||||
|
||||
@ -401,24 +411,25 @@ struct kvm_vmx_nested_state {
|
||||
|
||||
/* for KVM_CAP_NESTED_STATE */
|
||||
struct kvm_nested_state {
|
||||
/* KVM_STATE_* flags */
|
||||
__u16 flags;
|
||||
|
||||
/* 0 for VMX, 1 for SVM. */
|
||||
__u16 format;
|
||||
|
||||
/* 128 for SVM, 128 + VMCS size for VMX. */
|
||||
__u32 size;
|
||||
|
||||
union {
|
||||
/* VMXON, VMCS */
|
||||
struct kvm_vmx_nested_state vmx;
|
||||
struct kvm_vmx_nested_state_hdr vmx;
|
||||
|
||||
/* Pad the header to 128 bytes. */
|
||||
__u8 pad[120];
|
||||
};
|
||||
} hdr;
|
||||
|
||||
__u8 data[0];
|
||||
/*
|
||||
* Define data region as 0 bytes to preserve backwards-compatability
|
||||
* to old definition of kvm_nested_state in order to avoid changing
|
||||
* KVM_{GET,PUT}_NESTED_STATE ioctl values.
|
||||
*/
|
||||
union {
|
||||
struct kvm_vmx_nested_state_data vmx[0];
|
||||
} data;
|
||||
};
|
||||
|
||||
#endif /* _ASM_X86_KVM_H */
|
||||
|
||||
@ -45,7 +45,7 @@ trace_libc_inet_pton_backtrace() {
|
||||
eventattr='max-stack=4'
|
||||
echo "gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc\)$" >> $expected
|
||||
echo "getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$" >> $expected
|
||||
echo ".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" >> $expected
|
||||
echo ".*(\+0x[[:xdigit:]]+|\[unknown\])[[:space:]]\(.*/bin/ping.*\)$" >> $expected
|
||||
;;
|
||||
*)
|
||||
eventattr='max-stack=3'
|
||||
|
||||
@ -1800,14 +1800,8 @@ static int perf_event_open(struct perf_evsel *evsel,
|
||||
if (fd >= 0)
|
||||
break;
|
||||
|
||||
/*
|
||||
* Do quick precise_ip fallback if:
|
||||
* - there is precise_ip set in perf_event_attr
|
||||
* - maximum precise is requested
|
||||
* - sys_perf_event_open failed with ENOTSUP error,
|
||||
* which is associated with wrong precise_ip
|
||||
*/
|
||||
if (!precise_ip || !evsel->precise_max || (errno != ENOTSUP))
|
||||
/* Do not try less precise if not requested. */
|
||||
if (!evsel->precise_max)
|
||||
break;
|
||||
|
||||
/*
|
||||
|
||||
@ -3683,6 +3683,7 @@ int perf_event__synthesize_features(struct perf_tool *tool,
|
||||
return -ENOMEM;
|
||||
|
||||
ff.size = sz - sz_hdr;
|
||||
ff.ph = &session->header;
|
||||
|
||||
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
|
||||
if (!feat_ops[feat].synthesize) {
|
||||
|
||||
@ -210,6 +210,18 @@ void machine__exit(struct machine *machine)
|
||||
|
||||
for (i = 0; i < THREADS__TABLE_SIZE; i++) {
|
||||
struct threads *threads = &machine->threads[i];
|
||||
struct thread *thread, *n;
|
||||
/*
|
||||
* Forget about the dead, at this point whatever threads were
|
||||
* left in the dead lists better have a reference count taken
|
||||
* by who is using them, and then, when they drop those references
|
||||
* and it finally hits zero, thread__put() will check and see that
|
||||
* its not in the dead threads list and will not try to remove it
|
||||
* from there, just calling thread__delete() straight away.
|
||||
*/
|
||||
list_for_each_entry_safe(thread, n, &threads->dead, node)
|
||||
list_del_init(&thread->node);
|
||||
|
||||
exit_rwsem(&threads->lock);
|
||||
}
|
||||
}
|
||||
@ -1759,9 +1771,11 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th,
|
||||
if (threads->last_match == th)
|
||||
threads__set_last_match(threads, NULL);
|
||||
|
||||
BUG_ON(refcount_read(&th->refcnt) == 0);
|
||||
if (lock)
|
||||
down_write(&threads->lock);
|
||||
|
||||
BUG_ON(refcount_read(&th->refcnt) == 0);
|
||||
|
||||
rb_erase_cached(&th->rb_node, &threads->entries);
|
||||
RB_CLEAR_NODE(&th->rb_node);
|
||||
--threads->nr;
|
||||
@ -1771,9 +1785,16 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th,
|
||||
* will be called and we will remove it from the dead_threads list.
|
||||
*/
|
||||
list_add_tail(&th->node, &threads->dead);
|
||||
|
||||
/*
|
||||
* We need to do the put here because if this is the last refcount,
|
||||
* then we will be touching the threads->dead head when removing the
|
||||
* thread.
|
||||
*/
|
||||
thread__put(th);
|
||||
|
||||
if (lock)
|
||||
up_write(&threads->lock);
|
||||
thread__put(th);
|
||||
}
|
||||
|
||||
void machine__remove_thread(struct machine *machine, struct thread *th)
|
||||
|
||||
@ -125,10 +125,27 @@ void thread__put(struct thread *thread)
|
||||
{
|
||||
if (thread && refcount_dec_and_test(&thread->refcnt)) {
|
||||
/*
|
||||
* Remove it from the dead_threads list, as last reference
|
||||
* is gone.
|
||||
* Remove it from the dead threads list, as last reference is
|
||||
* gone, if it is in a dead threads list.
|
||||
*
|
||||
* We may not be there anymore if say, the machine where it was
|
||||
* stored was already deleted, so we already removed it from
|
||||
* the dead threads and some other piece of code still keeps a
|
||||
* reference.
|
||||
*
|
||||
* This is what 'perf sched' does and finally drops it in
|
||||
* perf_sched__lat(), where it calls perf_sched__read_events(),
|
||||
* that processes the events by creating a session and deleting
|
||||
* it, which ends up destroying the list heads for the dead
|
||||
* threads, but before it does that it removes all threads from
|
||||
* it using list_del_init().
|
||||
*
|
||||
* So we need to check here if it is in a dead threads list and
|
||||
* if so, remove it before finally deleting the thread, to avoid
|
||||
* an use after free situation.
|
||||
*/
|
||||
list_del_init(&thread->node);
|
||||
if (!list_empty(&thread->node))
|
||||
list_del_init(&thread->node);
|
||||
thread__delete(thread);
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user