From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9A12E33030C; Tue, 4 Nov 2025 14:46:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762267614; cv=none; b=dLuhmDqYwYEt0ni9OBrfFmwUCqXuHr0B7xIbaISvmYAckvxfvs2wg2//AHjT+hdlNjO/cGI8x/Sha7aTk7ZbYEarmkfqc59sWScyCjEgwG823ivCDOM/bQeqWcFFp4yj9LMWTJ6MYwaFY7zCoCeIzUWlfn+b2C3dUSR2kDP1Ktc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762267614; c=relaxed/simple; bh=p5hPIDaRZCzt92kFfvg6R3vu6oORTHx9zKqVYsgt6JI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JCfXGKVBPE5WvG6+pBCmxM3/PllHuUDJkPd3EpeXa1Z7GL59SpoeQb56CQJD+BPghjEsFHMLbzaN7Raaf2hQTtu77ukg0gggWpxLW6ssC4wvLNYf1jdakH18gTHRijhiQDj1C+PaNnP5kJsOEzl3WYWjPJtonA+ULppBLrHTLQQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BR6iMq/o; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BR6iMq/o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB10EC4CEF7; Tue, 4 Nov 2025 14:46:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762267614; bh=p5hPIDaRZCzt92kFfvg6R3vu6oORTHx9zKqVYsgt6JI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=BR6iMq/oPyikLtPw6az2lrms+Ge4xlCbIe4fTtTyY4tHC2n45aUuCaBWJvcHF/A2p KG+L13PEc2RsLTe2Mk23kete59d+Q1weoVYh9oZ41Lcj9tYM2y+3AgeUK0+VINu39M +JpI0LM2k4BtTsZKgmnBxnJEAXybPeg27TbBNKLF9yugOPhB0NVxSo6HVchUeXfVAF qRNmKshZFjj0DiPJkSKfZkszZJmfsbrYupU4l4zs45YfAOANDcda1F7Ts/8j3ypxQY +7Cw7rjtPK5Q40NkqYq8PGtP20CMcQreJOx9l0FiifHdkN4FehAdO4R06gT/JgzvpB p/l0PIqbrDxMw== Date: Tue, 4 Nov 2025 09:46:51 -0500 From: Sasha Levin To: "Huang, Kai" Cc: "patches@lists.linux.dev" , "stable@vger.kernel.org" , "alexandre.f.demers@gmail.com" , "Edgecombe, Rick P" , "mingo@kernel.org" , "dave.hansen@linux.intel.com" , "binbin.wu@linux.intel.com" , "kas@kernel.org" , "bp@alien8.de" , "coxu@redhat.com" , "Chen, Farrah" , "kvm@vger.kernel.org" , "pbonzini@redhat.com" , "dwmw@amazon.co.uk" , "x86@kernel.org" , "linux-coco@lists.linux.dev" , "peterz@infradead.org" Subject: Re: [PATCH AUTOSEL 6.17] x86/kexec: Disable kexec/kdump on platforms with TDX partial write erratum Message-ID: References: <20251025160905.3857885-1-sashal@kernel.org> <20251025160905.3857885-288-sashal@kernel.org> <834a33d34c5c3bf659c94cefc374b0b7a52ee1a6.camel@intel.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Mon, Nov 03, 2025 at 09:26:38AM +0000, Huang, Kai wrote: >On Sun, 2025-10-26 at 22:24 +0000, Huang, Kai wrote: >> On Sat, 2025-10-25 at 11:58 -0400, Sasha Levin wrote: >> > From: Kai Huang >> > >> > [ Upstream commit b18651f70ce0e45d52b9e66d9065b831b3f30784 ] >> > >> > >> >> [...] >> >> > --- >> > >> > LLM Generated explanations, may be completely bogus: >> > >> > YES >> > >> > **Why This Fix Matters** >> > - Prevents machine checks during kexec/kdump on early TDX-capable >> > platforms with the “partial write to TDX private memory” erratum. >> > Without this, the new kernel may hit an MCE after the old kernel >> > jumps, which is a hard failure affecting users. >> >> Hi, >> >> I don't think we should backport this for 6.17 stable. Kexec/kdump and >> TDX are mutually exclusive in Kconfig in 6.17, therefore it's not possible >> for TDX to impact kexec/kdump. >> >> This patch is part of the series which enables kexec/kdump together with >> TDX in Kconfig (which landed in 6.18) and should not be backported alone. > >Hi Sasha, > >Just a reminder that this patch should be dropped from stable kernel too >(just in case you missed, since I didn't get any further notice). Now dropped, thanks! -- Thanks, Sasha