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 A0E1F1DF246; Fri, 18 Apr 2025 12:37:33 +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=1744979855; cv=none; b=bAvaipcbJnd35phxbCdjr3fL6vhe4ged76sV9q+SqFV3FnUmQF1vDWkJF6YuwV+iSMbG4b3aTFbY9ez9G3DFOkZNWVMY3J0MpErkwbZfk37Zfg2fC9DMfDOmF5YFQ2qA3w08fsfK6F7kjwsyyHGVetzgfacOavwcxB0k7Z7yVQo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744979855; c=relaxed/simple; bh=uUnzL+q7wIgF2mGjWnGorLdgmjHPCsrTUJjyrxQ1HWo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=t+mgV9tR9VKFuYOT/ulrGdL9lwsd+ALHcLs8/vGnhUgbCFwZ82MKJu9zlpUW6KGCa0xw0YArqlgHwpeDDNHiqS7Fn/p9MzqZVcfJMh88dyFX/MhTSrgf4w1sFkAV4OiYRMrFT2IVQy4A7lSHrpz5ggUD0QBnLYTBJ/lrXj2eRAQ= 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=IaOHOOqw; 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="IaOHOOqw" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 78E3F40E024A; Fri, 18 Apr 2025 12:37:31 +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 wwvSEX_I3nzk; Fri, 18 Apr 2025 12:37:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1744979846; bh=s2mYFoHL8m7enCNSKO0eZ1lDiYgdygcE7DJwYrFMfkQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=IaOHOOqw0pQU5ukLw5Y8g5ELkxgpuopfQp1UexiF0eKfEeDwbbPbqyGqlMOoBmK9V rj4VwFD4xffQnnWOhaqGPK9ZQgol3TwMbocIWekptDwcZ8U7Cc25McHpDJuLsfNVwG ADMlnBgYxuE5nFlG+0vEY1cEE1wYzcDeQFhFy15a+TTE3u4+jUSwJZTDBD5IUfxIAO E10GaX4y2KswhQpI5ommRgkMGkouSPgAGPAlf5PTxMc2phPDhdXAwOvz2clfKmNT/l L6LwbM7rSVhu03qYJaXfxpJe/4D3q6pjpYLSD/p/lg4/9V6dYFEzLn1BI+RoL2lIxk EnVoSmkAbCqH362K/nMF4yRp0N8nJpwotBoZ2YBg1LhzanSCBYfQeBsShmDA1hvIKG ywNOWT7ZoDcbieevEZnRMBfvEwQ2qsS1IJSasDbEjr0QQgO+ZORxY4HnmEmD6M9ESV fpFqIPUJh4zD8T2EIVpWTUEt19sRAveg8W6pfVOhB4BVYCPhol/4NGV0klsCVzwX7q wRPc2nHiCGcgtTQOyunEoF78C4jD4O3QDTfp46v51vE3XiVUYQJulDol9qHbXNFm+K 9mtSVfv+XzpH64DFYc11Eh8bap+HgX+iPKRljSN1Ez9Fd4xnDvqClYKnqHhBfftSzu c/KxRyY72ggTpY1NM1GFs+rw= Received: from zn.tnic (p579690ee.dip0.t-ipconnect.de [87.150.144.238]) (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 9F44240E0247; Fri, 18 Apr 2025 12:37:19 +0000 (UTC) Date: Fri, 18 Apr 2025 14:37:13 +0200 From: Borislav Petkov To: Ingo Molnar , Greg KH , stable Cc: linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org, Sandipan Das , x86@kernel.org Subject: Re: [tip: x86/urgent] x86/cpu/amd: Fix workaround for erratum 1054 Message-ID: <20250418123713.GCaAJHedTC_JWN__Td@fat_crate.local> References: <174495817953.31282.5641497960291856424.tip-bot2@tip-bot2> <20250418104013.GAaAIsDW2skB12L-nm@renoirsky.local> Precedence: bulk X-Mailing-List: stable@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 Fri, Apr 18, 2025 at 02:11:44PM +0200, Ingo Molnar wrote: > No, it doesn't really 'need' a stable tag, it has a Fixes tag already, > which gets processed by the -stable team. Last time I asked Greg, he said they scan for those tags but it doesn't hurt to Cc stable as it helps. Greg? > Also, the bug is old, 1.5 years old: > > Date: Sat, 2 Dec 2023 12:50:23 +0100 > > plus the erratum is a perf-counters information quality bug affecting > what appears to be a limited number of models, with the workaround No, the fix is needed because Zen2 and newer won't set MSR_K7_HWCR_IRPERF_EN_BIT. It needs to go everywhere. > likely incorporated in BIOS updates as well. You can very much forget that argument. I have hard BIOS adoption data which paints an abysmal picture. So NEVER EVER rely on BIOS to do anything. Especially for Zen1 which is oooold in BIOS time. > Leave it up to the -stable team whether they think it's severe enough to > backport it? No, they leave it to us section maintainers to decide AFAIK. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette