From nobody Mon Apr 29 06:20:59 2024 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 476F1C77B7A for ; Fri, 2 Jun 2023 19:45:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236115AbjFBTpT (ORCPT ); Fri, 2 Jun 2023 15:45:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235937AbjFBTpS (ORCPT ); Fri, 2 Jun 2023 15:45:18 -0400 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 237CD19B for ; Fri, 2 Jun 2023 12:45:17 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-651f2f38634so1966036b3a.0 for ; Fri, 02 Jun 2023 12:45:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685735116; x=1688327116; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:sender:from:to:cc:subject:date:message-id:reply-to; bh=Yo0iLHtIXzns4YdryR3pdo44wLy6L2MpMgI0lT2F9VA=; b=DOTRovC7U744AstVeBREzqt5mec2w6cmU+Ju/GIz2VOX64xZo4EOUY3C533UaWZhh3 IzJUQq4wGZV3/NZrwM9H3JqIdFGgzJrugVjbwsNBNVg+2AG4+nz7Ez2eM80jXeDBPqyw YXyBlzDNBckIzTb0U0mFW28atGrt1z4ix0QUZSwdu4kycEttdPIQgvJENq1/4Lf6jprv +ebACT7Vl/RFBKMF2lBbqmazYrTdozXLwNJ1Y280dWzOvRkAgBd6c1vEEtwUb4dhiHVW DZ+8IYntD3VBNUDX1xNgQ6kZPxeRPaO3Wns0b1PBGKFlqrRAu3AJrzsdm9+GcGgHajj1 t8xw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685735116; x=1688327116; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:sender:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Yo0iLHtIXzns4YdryR3pdo44wLy6L2MpMgI0lT2F9VA=; b=I92vzsGyayF8hPw6vUDFT8YyNUn2/KqHl55YUW6maBre34kFds9lrdOsTdLthhG0VF euYI/VACMrvyzUOFyQ5CDM2xWq7gYd52w6VQQwlvEaHgV8Uc/FNcESxNEW6PzcE9ak96 1hUquDncs2CE1gdR6iaEsWN4dv/nyByWSu9GLTT6MhF/81o4AdiZk8S6HB6FnPIoxCbO 1ymgghZ4MFnpWgQ2IejzhG/yt2VaupE/ToJ1nFUk4MfNu3ZA2wEaUOYt7HYoyG4NKhsJ lg70LB2rhHz3Ey5YHr9qFWOwFM8b6lxAnOZnMz3bbRgJLEBsMTMVJXo7nrAAzw2Gq5E8 NOBQ== X-Gm-Message-State: AC+VfDwpTRIby2yA4D5c2ssyssoHQW3SDjuUiDci99Buqjq0Sm/UBAjA SvGCX/sUzfnhXrbVHDe1dkM= X-Google-Smtp-Source: ACHHUZ53OxGmNI4bh4qaoJDfzzgmubzPQTVpf2SCqXTNQ6fE+3I6JIgZFfm+jHuCq+7n7c4fPbbhhw== X-Received: by 2002:a05:6a00:23c8:b0:64c:c5f9:152a with SMTP id g8-20020a056a0023c800b0064cc5f9152amr16789338pfc.23.1685735116310; Fri, 02 Jun 2023 12:45:16 -0700 (PDT) Received: from moohyul.svl.corp.google.com ([2620:15c:2a3:200:bc81:87cb:7da8:98c2]) by smtp.gmail.com with ESMTPSA id j1-20020aa78d01000000b0065329194416sm1291341pfe.193.2023.06.02.12.45.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Jun 2023 12:45:15 -0700 (PDT) Sender: Namhyung Kim From: Namhyung Kim To: Peter Zijlstra , Ingo Molnar Cc: Arnaldo Carvalho de Melo , Jiri Olsa , Ian Rogers , Adrian Hunter , LKML , Stephane Eranian , Ravi Bangoria Subject: [PATCH] perf/x86/amd: Reject branch stack for IBS events Date: Fri, 2 Jun 2023 12:45:13 -0700 Message-ID: <20230602194513.1589179-1-namhyung@kernel.org> X-Mailer: git-send-email 2.41.0.rc2.161.g9c6817b8e7-goog MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The AMD IBS PMU doesn't handle branch stacks, so it should not accept events with brstack. Cc: Ravi Bangoria Signed-off-by: Namhyung Kim Reviewed-by: Ravi Bangoria --- arch/x86/events/amd/ibs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 371014802191..607a692ba8ce 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -265,6 +265,9 @@ static int perf_ibs_init(struct perf_event *event) if (config & ~perf_ibs->config_mask) return -EINVAL; =20 + if (has_branch_stack(event)) + return -EOPNOTSUPP; + if (hwc->sample_period) { if (config & perf_ibs->cnt_mask) /* raw max_cnt may not be set */ --=20 2.41.0.rc2.161.g9c6817b8e7-goog