From nobody Fri Sep 25 16:53:58 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2018A41BA62; Thu, 10 Sep 2026 09:02:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789030928; cv=none; b=SBHa7u+i8RFE7kmj+YQsW5IuL4WHJOzQEoBONP/BfB4kFuQ8YlEv6lyR4C1tkf2llcuK1MW11pBB2UUDPlODWyYmYxv8tYC+LwLgbBXrS63tI3T15mjAap7ZAxAD06FO2sRU3k5R7O3SSQHTj+fw733j37ARUoDdJhVYkdOe3sI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789030928; c=relaxed/simple; bh=+mJ52qKXP6hDuXm5eIYHJKu/sLZE0jSfda7KESf4GrM=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=A9MLw2EIidjUcwwgUU9Xap9j8eK0K5wOTCUUIiIz7IabOIAXc/NJhvAGzfyp8/noee6kv1WKjffTxwCySxE5HNNQXiXqmDQOxvjlESG28LOrsR4WMFS2ZI9PXuR5Y7Y4QxjaxNIagjDayNwFOamn/otN73YlFuFCCsXFajFfC9w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=GTFx2GUw; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=wVGWqKhw; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="GTFx2GUw"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="wVGWqKhw" Date: Thu, 10 Sep 2026 09:01:55 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1789030917; 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=n1DbE09Fy9wC+J806+srxVMo1ocfHQbHxxHyyX30d+I=; b=GTFx2GUwcjXk5Q5d2JoLa6awV2a6Ljjz7EELW00mB1sDvA19R7/a14GtllzJ53EuEdAOvj HEwcZwGzd5VfjCBLyRZONn43htC67y6BtzggKHS5KWGOxSj3b13BVswFOAVuIQszKnX3PX W3SapDEnTR/nnwaIVoz6qOF1Y5nozg0tVP5I/bp9PWJh/yPy7lrCFq/AMBLxlHZlq3/dtL FUArD0Qpx2OMu0glb+l2xumTvF6T3G6JcPJLGvSUabBqCvU1QgXP3Go1WYCPnxuUFPzOfj EMJHQqp2WSTFVkQbVYBPdQeGenD8fR9HdDt0n9i42wc9wSXSkXEzRqPYyHIT0A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1789030917; 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=n1DbE09Fy9wC+J806+srxVMo1ocfHQbHxxHyyX30d+I=; b=wVGWqKhwNL76FbJpQ2W182mb7JBXbr1hL7ekshnhsyhsP+PGkoO6ng2O1N3CUENJTsNom8 Th1cfSEam8RGqyAg== From: "tip-bot2 for Dapeng Mi" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/urgent] perf/x86/intel: Correct pt_regs->flags update for PEBS path Cc: Dapeng Mi , "Peter Zijlstra (Intel)" , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20260908075102.540715-1-dapeng1.mi@linux.intel.com> References: <20260908075102.540715-1-dapeng1.mi@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <178903091589.623050.3795015000882992080.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the perf/urgent branch of tip: Commit-ID: 88aa1223bfffb1a0a98c639e9e1f71058f0d9178 Gitweb: https://git.kernel.org/tip/88aa1223bfffb1a0a98c639e9e1f71058= f0d9178 Author: Dapeng Mi AuthorDate: Tue, 08 Sep 2026 15:51:01 +08:00 Committer: Peter Zijlstra CommitterDate: Thu, 10 Sep 2026 10:22:50 +02:00 perf/x86/intel: Correct pt_regs->flags update for PEBS path pt_regs->flags holds the saved CPU FLAGS register. In the PEBS path, it was incorrectly set to PERF_EFLAGS_EXACT instead of being populated from the PEBS flags snapshot. Update pt_regs->flags from PEBS GPR flags if GPRs group is present. Fixes: c22497f5838c ("perf/x86/intel: Support adaptive PEBS v4") Signed-off-by: Dapeng Mi Signed-off-by: Peter Zijlstra (Intel) Link: https://patch.msgid.link/20260908075102.540715-1-dapeng1.mi@linux.int= el.com --- arch/x86/events/intel/ds.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 8940f02..d0bb767 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2432,7 +2432,7 @@ static inline void __setup_pebs_basic_group(struct pe= rf_event *event, { /* The ip in basic is EventingIP */ set_linear_ip(regs, ip); - regs->flags =3D PERF_EFLAGS_EXACT; + regs->flags |=3D PERF_EFLAGS_EXACT; setup_pebs_time(event, data, tsc); =20 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) @@ -2444,9 +2444,17 @@ static inline void __setup_pebs_gpr_group(struct per= f_event *event, struct pebs_gprs *gprs, u64 sample_type) { + /* + * Update flags with PEBS data. PERF_EFLAGS_EXACT must be set + * in previous basic group handling. + */ + regs->flags =3D gprs->flags | PERF_EFLAGS_EXACT; + if (event->attr.precise_ip < 2) { set_linear_ip(regs, gprs->ip); regs->flags &=3D ~PERF_EFLAGS_EXACT; + } else if (regs->flags & X86_VM_MASK) { + regs->flags ^=3D (PERF_EFLAGS_VM | X86_VM_MASK); } =20 if (sample_type & (PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER))