From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (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 48EB6145341; Wed, 5 Jun 2024 11:33:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717587240; cv=none; b=cMMo4D8xcNApQl/CY9hwM1eBY/kM+w/i+a5D+Va+UMPKYhiDhuFH7DTZVXsa0J+3ygiB7WSyJuRFyE6FcBscrMBmmv3/02R3bTmOeOsaoefIXVpddXcG8qk/Oe339mTHlNIJO75kFGK6qGyRjU05zmc1HFkIjgsBh9elbCYI+lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717587240; c=relaxed/simple; bh=b1OcgW8wUSyivcgWbQC7y0JYwv52L9er4YfBuZGvmdU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=gtmoZ6Llg5kByiU3AwOjnCTz7F/lJD3YSSG351VdVAHjdIGLAVITeI2wDa4PXoJPhI5pcg2uHtXPQ+dR4fPp5f6kmO2A3JWpnlzvwdoy0CT9XpkpnZx2Yi/zwnQGIssHppA8fJFdz70qCxKQxaqVU6tmfFqB6VXFsRgPDiRsyYU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=Ycssa+al; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="Ycssa+al" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 9469540E0184; Wed, 5 Jun 2024 11:33:56 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id ojFs060G7dlj; Wed, 5 Jun 2024 11:33:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1717587232; bh=2L6sv+ET0LaoOrBxBmQEBSmnDbAmhN4YLVNcSuW3cSY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Ycssa+al5Tr5ayCRsGg+jI2pTXGnrQT+p5jY6Z7tfICj7WvfAOdrvJkND7nl1l2JX H+y+deL4856Vfu/SWHPW/ljLc5X4niQsNd4ypHWdc4RLcGT8O8HkjBjajzZv8VDX90 IlHwUOJYWpBmQJvTlKd3WwKknWCwtUXrHoTvkscfzRgDIV0W65G1c1Fn7HLJBmZglH 2EYIseq9dkJqzcttHsifN3VI8zTG9FscO4mpqbdwgIkIe3R6evVM6HTKyQ2AWct+c1 IHPLyf2tZoXb9kB8uN24gO2HIa2mAuybHfwYeomyyU6oMSa890H52HYDoNZgOyXgco 6LGKlyxkmBPoaq7XmO5BBz9D2SpndH9lioT/cjL5P0GAV5S/AvEnvtlCGBnodJPlxC k0Eywo+3w9fVgZIm0xZhh9eHO9c0uwW8mevpbJDrRryqfEszrwJESllDd++mfMCvSG rpv1OnvKGUpyneZhCpTQDGdGA8ie5HMS1wuMgX+PKl16qltMf8CXJRls+rzfUdl++R TF0jG3+p8l1Vv6NZeL1ELFy2mkLd3O89MhPSPyF2s1/xQoFgj7qXDk0oxqYa6g5lMH +K66+OP7JZKc5girvTyibrWdFSHg8U9BBSOToBl0L7F5OZSA6WPfvkrKNAfBCSNJiq 1NAqipZ8iJHdPqXKm4UQnJaM= Received: from zn.tnic (p5de8ee85.dip0.t-ipconnect.de [93.232.238.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 9DEF240E0177; Wed, 5 Jun 2024 11:33:29 +0000 (UTC) Date: Wed, 5 Jun 2024 13:33:23 +0200 From: Borislav Petkov To: Tony W Wang-oc Cc: Thomas Gleixner , Linus Torvalds , Dave Hansen , mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, keescook@chromium.org, tony.luck@intel.com, gpiccoli@igalia.com, mat.jonczyk@o2.pl, rdunlap@infradead.org, alexandre.belloni@bootlin.com, mario.limonciello@amd.com, yaolu@kylinos.cn, bhelgaas@google.com, justinstitt@google.com, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, CobeChen@zhaoxin.com, TimGuo@zhaoxin.com, LeoLiu-oc@zhaoxin.com Subject: Re: [PATCH] x86/hpet: Read HPET directly if panic in progress Message-ID: <20240605113323.GFZmBNA7ec2s191_2w@fat_crate.local> References: <20240528063836.5248-1-TonyWWang-oc@zhaoxin.com> <50fc1bd3-909e-41c4-a991-9d81e32ef92c@intel.com> <87wmnda8mc.ffs@tglx> <87le3t9i8c.ffs@tglx> <0aff3f62-a8a5-4358-ae3f-2ded339aface@zhaoxin.com> <20240605093609.GCZmAxidNIBP5bkDcX@fat_crate.local> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Wed, Jun 05, 2024 at 06:10:07PM +0800, Tony W Wang-oc wrote: > It may also happen without setting fake_panic, such as an MCE error of the > UCNA/SRAO type occurred? Which types exactly do you mean when you're looking at the severities[] array in severity.c? And what scenario are you talking about? To get an #MC exception and detect only UCNA/SRAO errors? Can that even happen on any hardware? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette