From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ms.lwn.net (ms.lwn.net [45.79.88.28]) (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 D54042DFA32; Tue, 6 Jan 2026 22:23:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.79.88.28 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767738222; cv=none; b=tAXelMmSf0m0tTDj7F7U3gG94Tec9oAouwckXfQlWBaloIsS4XtnAMfmxJia03aNL+uknaoa/BP15GbpLUJssu6W5d9XPM8l0hT+WM4WBiOrIYaXcDQPZik5kPJBj858fGpx3MxPrJxxvkcbfkc60LQClBXCUNV9Xv7moxPGd2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767738222; c=relaxed/simple; bh=kA/CZGazNjF0PyzgSuT0j71AaFqM3SvbSzr03t8BR1I=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=PbcwZR2gmDnKMtGpRL4COJPZU1L2J4DgvMimYhZoVvPETUEZJMEyFPBRYnTndQ3x2MIMFlEd+oEaf39OT/aWY4oCbgTHTS9Ix7OkGHKwTh+ExzvyJaEtlgcOr/uR03V9wK8tfy9ssZqdyx7qAwU4kLFFg713DACZaEiVZhT0OpQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net; spf=pass smtp.mailfrom=lwn.net; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b=Jd9UJC2i; arc=none smtp.client-ip=45.79.88.28 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lwn.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b="Jd9UJC2i" DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net 1FEBA40C7D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1767738220; bh=yv+stMkiWEGechdbMig5qW95kgUZAMc9a/NgYZmJWXo=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=Jd9UJC2iudgbzDAeTxeyn8AMFUazQugUtnE1qQVxP7Q6YdO/ZhO3JMe2f99mRe1Mf vInI8xwM+p8+Auz+xENBpWVePrOp+elW020vQbK1ik7zWiyXlZbzjXLZdhfksrRcTd wNTwBpH/fNdaAh6Pa/ELPzZM/916M+0fgOjbomqbVR216h3s36ZWEL33S+tWgkzrUW cdPHpPFNqvz+jY5PhfFipsgBg5JU7mjbV9hEQa5ZCOsiJYGAz3i8lY1KEqjw8k4XCn HXJcnFuOo4CGyGbNecQW5vc6/qrKdvGZbQaNYhb/TUgM+UIJcFQXplz4uSkeHuSaf4 /KgSQWLfux2mw== Received: from localhost (c-71-229-227-126.hsd1.co.comcast.net [71.229.227.126]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id 1FEBA40C7D; Tue, 6 Jan 2026 22:23:40 +0000 (UTC) From: Jonathan Corbet To: Yu Liao , bp@alien8.de, linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org, x86@kernel.org, wangsiqi.3@bytedance.com, liaoyu.ly@bytedance.com Subject: Re: [PATCH] Documentation/kernel-parameters: Add tsa under mitigations=off In-Reply-To: <20251225121438.38427-1-liaoyu.ly@bytedance.com> References: <20251225121438.38427-1-liaoyu.ly@bytedance.com> Date: Tue, 06 Jan 2026 15:23:39 -0700 Message-ID: <87h5sybct0.fsf@trenco.lwn.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Yu Liao writes: > On X86 AMD systems, mitigations=off also disables the Transient > Scheduler Attacks (TSA) mitigation. Add it to the list. > > Signed-off-by: Yu Liao > --- > Documentation/admin-guide/kernel-parameters.txt | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a8d0afde7f85..f4a2bf906bf3 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -3998,6 +3998,7 @@ Kernel parameters > spectre_v2_user=off [X86] > srbds=off [X86,INTEL] > ssbd=force-off [ARM64] > + tsa=off [X86,AMD] > tsx_async_abort=off [X86] > vmscape=off [X86] Applied, thanks. jon