diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 206ce31116b2383b76958028df11a44c87c6a808..082fe2b988a1d4b2d0fa2f1f3f393a38c6ac386f 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -681,6 +681,11 @@ static inline int is_x86_event(struct perf_event *event) return event->pmu == &pmu; } +struct pmu *x86_get_pmu(void) +{ + return &pmu; +} + /* * Event scheduler state: * diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index f3d6493a04a78d2f3c3be9a62650c89c4d7360f0..17fbbc490d10d081a2fad41d67457f5aadfc78ac 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2018,6 +2018,7 @@ void __init intel_ds_init(void) PERF_SAMPLE_TIME; x86_pmu.flags |= PMU_FL_PEBS_ALL; pebs_qual = "-baseline"; + x86_get_pmu()->capabilities |= PERF_PMU_CAP_EXTENDED_REGS; } else { /* Only basic record supported */ x86_pmu.pebs_no_xmm_regs = 1; diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 55b32febbe33f3210baba49af396a544d647a8d5..aab2fa34c683803e82c118a52289f832eaa6289d 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -773,6 +773,7 @@ static struct perf_pmu_events_ht_attr event_attr_##v = { \ .event_str_ht = ht, \ } +struct pmu *x86_get_pmu(void); extern struct x86_pmu x86_pmu __read_mostly; static inline bool x86_pmu_has_lbr_callstack(void) diff --git a/arch/x86/include/uapi/asm/perf_regs.h b/arch/x86/include/uapi/asm/perf_regs.h index ac67bbea10cae36848ff0be197c40a3a7af7c0f6..7c9d2bb3833bd2cece61f5542c64ced1952d9091 100644 --- a/arch/x86/include/uapi/asm/perf_regs.h +++ b/arch/x86/include/uapi/asm/perf_regs.h @@ -52,4 +52,7 @@ enum perf_event_x86_regs { /* These include both GPRs and XMMX registers */ PERF_REG_X86_XMM_MAX = PERF_REG_X86_XMM15 + 2, }; + +#define PERF_REG_EXTENDED_MASK (~((1ULL << PERF_REG_X86_XMM0) - 1)) + #endif /* _ASM_X86_PERF_REGS_H */ diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 78c77a91c3b62a7cec9dd1052c2a2566c92b57df..f6174c8a8c8ad23332da3bb34ddb8e869b65f89a 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -240,6 +240,7 @@ struct perf_event; #define PERF_PMU_CAP_NO_INTERRUPT 0x01 #define PERF_PMU_CAP_NO_NMI 0x02 #define PERF_PMU_CAP_AUX_NO_SG 0x04 +#define PERF_PMU_CAP_EXTENDED_REGS 0x08 #define PERF_PMU_CAP_EXCLUSIVE 0x10 #define PERF_PMU_CAP_ITRACE 0x20 #define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x40 diff --git a/include/linux/perf_regs.h b/include/linux/perf_regs.h index 476747456bca590df158a3ea630aa940597eea02..2d12e97d5e7bc16a3edf1c9a39e177f7b73e5874 100644 --- a/include/linux/perf_regs.h +++ b/include/linux/perf_regs.h @@ -11,6 +11,11 @@ struct perf_regs { #ifdef CONFIG_HAVE_PERF_REGS #include + +#ifndef PERF_REG_EXTENDED_MASK +#define PERF_REG_EXTENDED_MASK 0 +#endif + u64 perf_reg_value(struct pt_regs *regs, int idx); int perf_reg_validate(u64 mask); u64 perf_reg_abi(struct task_struct *task); @@ -18,6 +23,9 @@ void perf_get_regs_user(struct perf_regs *regs_user, struct pt_regs *regs, struct pt_regs *regs_user_copy); #else + +#define PERF_REG_EXTENDED_MASK 0 + static inline u64 perf_reg_value(struct pt_regs *regs, int idx) { return 0; diff --git a/kernel/events/core.c b/kernel/events/core.c index 728186f7b5df601ceaba2f5b156f79c8c06861e7..d7aa8971b27889ffcf171b7c9d4a72410c3a4748 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9850,6 +9850,12 @@ void perf_pmu_unregister(struct pmu *pmu) } EXPORT_SYMBOL_GPL(perf_pmu_unregister); +static inline bool has_extended_regs(struct perf_event *event) +{ + return (event->attr.sample_regs_user & PERF_REG_EXTENDED_MASK) || + (event->attr.sample_regs_intr & PERF_REG_EXTENDED_MASK); +} + static int perf_try_init_event(struct pmu *pmu, struct perf_event *event) { struct perf_event_context *ctx = NULL; @@ -9881,12 +9887,16 @@ static int perf_try_init_event(struct pmu *pmu, struct perf_event *event) perf_event_ctx_unlock(event->group_leader, ctx); if (!ret) { + if (!(pmu->capabilities & PERF_PMU_CAP_EXTENDED_REGS) && + has_extended_regs(event)) + ret = -EOPNOTSUPP; + if (pmu->capabilities & PERF_PMU_CAP_NO_EXCLUDE && - event_has_any_exclude_flag(event)) { - if (event->destroy) - event->destroy(event); + event_has_any_exclude_flag(event)) ret = -EINVAL; - } + + if (ret && event->destroy) + event->destroy(event); } if (ret)