From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47B7CC0502A for ; Fri, 26 Aug 2022 22:16:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345113AbiHZWQC (ORCPT ); Fri, 26 Aug 2022 18:16:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242698AbiHZWPx (ORCPT ); Fri, 26 Aug 2022 18:15:53 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F7116DAEB; Fri, 26 Aug 2022 15:15:51 -0700 (PDT) Date: Fri, 26 Aug 2022 22:15:48 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1661552149; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=L7FCVs0ouqldvQWRn61yXW9yw/lp7jB6WgFLvwRhDPc=; b=IhdRw8jWiUUYLi/6t+dADYftUM5A369+GLZYOLasjmF/+YxPYjoErhwCdA3GzdocnZZbjr bELkXVSJ/B1vp1n1SNTl8rwCHPIK1ZeJc3rYXRpOE5aR9GgtNQ+JWPrROq8VWhSDmhokLU ogyT6+tStyDGZLRX1PU4m8hsijXIJWjh+fPrPv80p3IBSawdF8OmuCYVvjUfUCYKPttYUx DDB/Y5gm9gWUY+UD3AEpoXg4DkbxdrowpfDtAN5bV6teb553gtSrpAtFWMlty4B0lCzD13 MA5C8/A5VvCjY4huzabhrI9YK7xkChGFDaS+JKJb3q6EzdWSREZHmnRRviZk+g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1661552149; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=L7FCVs0ouqldvQWRn61yXW9yw/lp7jB6WgFLvwRhDPc=; b=XVkAJGn3syzGTxehqwviGZ2/s5UxcgLNIzPToe62P6yuifYp3x0KHJd7+4UlZlioi5/aOb 3de6OeQ95x9LLuDQ== From: "tip-bot2 for Anshuman Khandual" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] perf: Capture branch privilege information Cc: Anshuman Khandual , "Peter Zijlstra (Intel)" , James Clark , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20220824044822.70230-4-anshuman.khandual@arm.com> References: <20220824044822.70230-4-anshuman.khandual@arm.com> MIME-Version: 1.0 Message-ID: <166155214801.401.16152978599761815008.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the perf/core branch of tip: Commit-ID: 7203d4a5c19fc13c5229c4c1a08a5f9222207230 Gitweb: https://git.kernel.org/tip/7203d4a5c19fc13c5229c4c1a08a5f9222207230 Author: Anshuman Khandual AuthorDate: Wed, 24 Aug 2022 10:18:17 +05:30 Committer: Peter Zijlstra CommitterDate: Sat, 27 Aug 2022 00:05:47 +02:00 perf: Capture branch privilege information Platforms like arm64 could capture privilege level information for all the branch records. Hence this adds a new element in the struct branch_entry to record the privilege level information, which could be requested through a new event.attr.branch_sample_type based flag PERF_SAMPLE_BRANCH_PRIV_SAVE. This flag helps user choose whether privilege information is captured. Signed-off-by: Anshuman Khandual Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: James Clark Link: https://lkml.kernel.org/r/20220824044822.70230-4-anshuman.khandual@arm.com --- include/uapi/linux/perf_event.h | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index fed60e6..1a258d4 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -204,6 +204,8 @@ enum perf_branch_sample_type_shift { PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT = 17, /* save low level index of raw branch records */ + PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT = 18, /* save privilege mode */ + PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */ }; @@ -233,6 +235,8 @@ enum perf_branch_sample_type { PERF_SAMPLE_BRANCH_HW_INDEX = 1U << PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT, + PERF_SAMPLE_BRANCH_PRIV_SAVE = 1U << PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT, + PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT, }; @@ -282,6 +286,13 @@ enum { PERF_BR_NEW_MAX, }; +enum { + PERF_BR_PRIV_UNKNOWN = 0, + PERF_BR_PRIV_USER = 1, + PERF_BR_PRIV_KERNEL = 2, + PERF_BR_PRIV_HV = 3, +}; + #define PERF_SAMPLE_BRANCH_PLM_ALL \ (PERF_SAMPLE_BRANCH_USER|\ PERF_SAMPLE_BRANCH_KERNEL|\ @@ -1402,7 +1413,8 @@ struct perf_branch_entry { type:4, /* branch type */ spec:2, /* branch speculation info */ new_type:4, /* additional branch type */ - reserved:34; + priv:3, /* privilege level */ + reserved:31; }; union perf_sample_weight {