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[66.90.148.213]) by smtp.googlemail.com with ESMTPSA id y14sm2883236oti.69.2021.09.14.13.48.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Sep 2021 13:48:02 -0700 (PDT) From: Rob Herring To: Will Deacon , Mark Rutland , Peter Zijlstra , Ingo Molnar Cc: Catalin Marinas , Arnaldo Carvalho de Melo , Jiri Olsa , Kan Liang , Ian Rogers , Alexander Shishkin , honnappa.nagarahalli@arm.com, Zachary.Leaf@arm.com, Raphael Gault , Jonathan Cameron , Namhyung Kim , Itaru Kitayama , Vince Weaver , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , linux-perf-users@vger.kernel.org Subject: [PATCH v10 1/5] x86: perf: Move RDPMC event flag to a common definition Date: Tue, 14 Sep 2021 15:47:56 -0500 Message-Id: <20210914204800.3945732-2-robh@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210914204800.3945732-1-robh@kernel.org> References: <20210914204800.3945732-1-robh@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210914_134810_638298_804C0477 X-CRM114-Status: GOOD ( 21.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In preparation to enable user counter access on arm64 and to move some of the user access handling to perf core, create a common event flag for user counter access and convert x86 to use it. Since the architecture specific flags start at the LSB, starting at the MSB for common flags. Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: Mark Rutland Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: Kan Liang Cc: Thomas Gleixner Cc: Borislav Petkov Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: linux-perf-users@vger.kernel.org Signed-off-by: Rob Herring --- arch/x86/events/core.c | 10 +++++----- arch/x86/events/perf_event.h | 2 +- include/linux/perf_event.h | 2 ++ 3 files changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 2a57dbed4894..2bd50fc061e1 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -2469,7 +2469,7 @@ static int x86_pmu_event_init(struct perf_event *event) if (READ_ONCE(x86_pmu.attr_rdpmc) && !(event->hw.flags & PERF_X86_EVENT_LARGE_PEBS)) - event->hw.flags |= PERF_X86_EVENT_RDPMC_ALLOWED; + event->hw.flags |= PERF_EVENT_FLAG_USER_READ_CNT; return err; } @@ -2503,7 +2503,7 @@ void perf_clear_dirty_counters(void) static void x86_pmu_event_mapped(struct perf_event *event, struct mm_struct *mm) { - if (!(event->hw.flags & PERF_X86_EVENT_RDPMC_ALLOWED)) + if (!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)) return; /* @@ -2524,7 +2524,7 @@ static void x86_pmu_event_mapped(struct perf_event *event, struct mm_struct *mm) static void x86_pmu_event_unmapped(struct perf_event *event, struct mm_struct *mm) { - if (!(event->hw.flags & PERF_X86_EVENT_RDPMC_ALLOWED)) + if (!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)) return; if (atomic_dec_and_test(&mm->context.perf_rdpmc_allowed)) @@ -2535,7 +2535,7 @@ static int x86_pmu_event_idx(struct perf_event *event) { struct hw_perf_event *hwc = &event->hw; - if (!(hwc->flags & PERF_X86_EVENT_RDPMC_ALLOWED)) + if (!(hwc->flags & PERF_EVENT_FLAG_USER_READ_CNT)) return 0; if (is_metric_idx(hwc->idx)) @@ -2718,7 +2718,7 @@ void arch_perf_update_userpage(struct perf_event *event, userpg->cap_user_time = 0; userpg->cap_user_time_zero = 0; userpg->cap_user_rdpmc = - !!(event->hw.flags & PERF_X86_EVENT_RDPMC_ALLOWED); + !!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT); userpg->pmc_width = x86_pmu.cntval_bits; if (!using_native_sched_clock() || !sched_clock_stable()) diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index e3ac05c97b5e..49f68b15745f 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -73,7 +73,7 @@ static inline bool constraint_match(struct event_constraint *c, u64 ecode) #define PERF_X86_EVENT_PEBS_NA_HSW 0x0010 /* haswell style datala, unknown */ #define PERF_X86_EVENT_EXCL 0x0020 /* HT exclusivity on counter */ #define PERF_X86_EVENT_DYNAMIC 0x0040 /* dynamic alloc'd constraint */ -#define PERF_X86_EVENT_RDPMC_ALLOWED 0x0080 /* grant rdpmc permission */ + #define PERF_X86_EVENT_EXCL_ACCT 0x0100 /* accounted EXCL event */ #define PERF_X86_EVENT_AUTO_RELOAD 0x0200 /* use PEBS auto-reload */ #define PERF_X86_EVENT_LARGE_PEBS 0x0400 /* use large PEBS */ diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index fe156a8170aa..12debf008d39 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -142,6 +142,8 @@ struct hw_perf_event { int event_base_rdpmc; int idx; int last_cpu; + +#define PERF_EVENT_FLAG_USER_READ_CNT 0x80000000 int flags; struct hw_perf_event_extra extra_reg; -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel