From patchwork Mon Dec 11 04:55:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kyle Huey X-Patchwork-Id: 13486656 X-Patchwork-Delegate: bpf@iogearbox.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kylehuey.com header.i=@kylehuey.com header.b="MTnHAGWt" Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5C07F4 for ; Sun, 10 Dec 2023 20:55:56 -0800 (PST) Received: by mail-pj1-x1033.google.com with SMTP id 98e67ed59e1d1-28648be0811so2811778a91.0 for ; Sun, 10 Dec 2023 20:55:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kylehuey.com; s=google; t=1702270556; x=1702875356; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MD1CGVptJqB75nV04X/vQRYGuHl6l1SpLkm2NuE80OA=; b=MTnHAGWt+qRvHekeTQ34DLhn3CKxjyXAQxPHsdHOZCFMr1OeQBEcgCZAi+dte3F9e4 Tv0s7kcJDYTpMmHnWyqNzMxUxd31ROM/qPQjsrbcLJd6U0IW+99p29Xh8JrWDOAXh9sm fS8YNpXfvpllHfkuBg4tKTSslrTIk1xSjSWghPb7WnH3fipst/Hb3SbWpx2tHPJftNE9 1yve8XSVYvSYpPbP9c8Nob1B6LR7vR/nQihHjBizydeA/O+MLG21kPtqlHpatqEMr503 JOKYWJjCWZcfcXqdIk/ozkCVwI6tEaKawHO7yMpfJ1RUVFD6TyriSnrhIWUKH+ppH6dD St5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702270556; x=1702875356; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MD1CGVptJqB75nV04X/vQRYGuHl6l1SpLkm2NuE80OA=; b=dsHdgi2e9U7daTWHKZ4Wqcl2xkqDr6Xq4nDvGi5hs3bvEvwj0cNTNIPTz+KOv9GcSE 8xnndhq1SCGkFUacxWTBmAWEPevTKuFCHvO8SL1LLWR+CI7TFDCx9c6eFXvfp4OsyNb2 Xt2GR5EyL5WOipXLl5bV9dHFeIUItmwf3bcr/l1y43GXR01gStyXfETrG7S8PH65JCdZ O7BVC3ZopBXEhWgSVcYeXroq5Jq1o972nvePPxtYThB7FgITI8m+g7jTd7IrTFy4YtNy +jthi6E2VWiXgWDZ5RYwjaVXvCwrXy/QENN+NdpUKUMEur1MeiXeZeKVkGsjJP6vjWxr Qeow== X-Gm-Message-State: AOJu0YwP03EuRCIxdAGHURv8JeFasC0CHMIk8/sULF3BdPHTN8ScqRuO pnZroxUPb5vNpvTiNyZrjDG7POhkXDDlBRmSrl5F/w== X-Google-Smtp-Source: AGHT+IFk4Rw49zHj089ze8JCHt9tGAvA1DX6jp40Y61tz9veBn8RRGtYiMdt7+m5TnCHgq0Zz4xZqQ== X-Received: by 2002:a17:902:da89:b0:1d0:6ffe:1e63 with SMTP id j9-20020a170902da8900b001d06ffe1e63mr2161568plx.70.1702270556361; Sun, 10 Dec 2023 20:55:56 -0800 (PST) Received: from zhadum.home.kylehuey.com (c-76-126-33-191.hsd1.ca.comcast.net. [76.126.33.191]) by smtp.gmail.com with ESMTPSA id e11-20020a170902b78b00b001d2ffeac9d3sm3300623pls.186.2023.12.10.20.55.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 Dec 2023 20:55:55 -0800 (PST) From: Kyle Huey X-Google-Original-From: Kyle Huey To: Kyle Huey , linux-kernel@vger.kernel.org, Andrii Nakryiko , Jiri Olsa , Namhyung Kim , Marco Elver , Yonghong Song Cc: Robert O'Callahan , Will Deacon , Mark Rutland , Russell King , Catalin Marinas , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Ian Rogers , Adrian Hunter , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH v3 2/4] perf/bpf: Remove unneeded uses_default_overflow_handler. Date: Sun, 10 Dec 2023 20:55:41 -0800 Message-Id: <20231211045543.31741-3-khuey@kylehuey.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231211045543.31741-1-khuey@kylehuey.com> References: <20231211045543.31741-1-khuey@kylehuey.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Now that struct perf_event's orig_overflow_handler is gone, there's no need for the functions and macros to support looking past overflow_handler to orig_overflow_handler. This patch is solely a refactoring and results in no behavior change. Signed-off-by: Kyle Huey Acked-by: Will Deacon Acked-by: Song Liu --- arch/arm/kernel/hw_breakpoint.c | 8 ++++---- arch/arm64/kernel/hw_breakpoint.c | 4 ++-- include/linux/perf_event.h | 16 ++-------------- 3 files changed, 8 insertions(+), 20 deletions(-) diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index dc0fb7a81371..054e9199f30d 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -626,7 +626,7 @@ int hw_breakpoint_arch_parse(struct perf_event *bp, hw->address &= ~alignment_mask; hw->ctrl.len <<= offset; - if (uses_default_overflow_handler(bp)) { + if (is_default_overflow_handler(bp)) { /* * Mismatch breakpoints are required for single-stepping * breakpoints. @@ -798,7 +798,7 @@ static void watchpoint_handler(unsigned long addr, unsigned int fsr, * Otherwise, insert a temporary mismatch breakpoint so that * we can single-step over the watchpoint trigger. */ - if (!uses_default_overflow_handler(wp)) + if (!is_default_overflow_handler(wp)) continue; step: enable_single_step(wp, instruction_pointer(regs)); @@ -811,7 +811,7 @@ static void watchpoint_handler(unsigned long addr, unsigned int fsr, info->trigger = addr; pr_debug("watchpoint fired: address = 0x%x\n", info->trigger); perf_bp_event(wp, regs); - if (uses_default_overflow_handler(wp)) + if (is_default_overflow_handler(wp)) enable_single_step(wp, instruction_pointer(regs)); } @@ -886,7 +886,7 @@ static void breakpoint_handler(unsigned long unknown, struct pt_regs *regs) info->trigger = addr; pr_debug("breakpoint fired: address = 0x%x\n", addr); perf_bp_event(bp, regs); - if (uses_default_overflow_handler(bp)) + if (is_default_overflow_handler(bp)) enable_single_step(bp, addr); goto unlock; } diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c index 35225632d70a..db2a1861bb97 100644 --- a/arch/arm64/kernel/hw_breakpoint.c +++ b/arch/arm64/kernel/hw_breakpoint.c @@ -654,7 +654,7 @@ static int breakpoint_handler(unsigned long unused, unsigned long esr, perf_bp_event(bp, regs); /* Do we need to handle the stepping? */ - if (uses_default_overflow_handler(bp)) + if (is_default_overflow_handler(bp)) step = 1; unlock: rcu_read_unlock(); @@ -733,7 +733,7 @@ static u64 get_distance_from_watchpoint(unsigned long addr, u64 val, static int watchpoint_report(struct perf_event *wp, unsigned long addr, struct pt_regs *regs) { - int step = uses_default_overflow_handler(wp); + int step = is_default_overflow_handler(wp); struct arch_hw_breakpoint *info = counter_arch_bp(wp); info->trigger = addr; diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 312b9f31442c..7fef6299151b 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1321,8 +1321,9 @@ extern int perf_event_output(struct perf_event *event, struct pt_regs *regs); static inline bool -__is_default_overflow_handler(perf_overflow_handler_t overflow_handler) +is_default_overflow_handler(struct perf_event *event) { + perf_overflow_handler_t overflow_handler = event->overflow_handler; if (likely(overflow_handler == perf_event_output_forward)) return true; if (unlikely(overflow_handler == perf_event_output_backward)) @@ -1330,19 +1331,6 @@ __is_default_overflow_handler(perf_overflow_handler_t overflow_handler) return false; } -#define is_default_overflow_handler(event) \ - __is_default_overflow_handler((event)->overflow_handler) - -#ifdef CONFIG_BPF_SYSCALL -static inline bool uses_default_overflow_handler(struct perf_event *event) -{ - return is_default_overflow_handler(event); -} -#else -#define uses_default_overflow_handler(event) \ - is_default_overflow_handler(event) -#endif - extern void perf_event_header__init_id(struct perf_event_header *header, struct perf_sample_data *data,