From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.mixaill.net (mail.mixaill.net [144.76.234.135]) (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 5B08BBE5E for ; Sun, 6 Jul 2025 20:31:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=144.76.234.135 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751833893; cv=none; b=gSeZkrUVNLkQg4IaCJJ+uIjMYcvevQz6igMrcZf29MyJkykTJcWTH9uiV7jxhOht4sFtm4nMavRCkhCstX4r2l9GFq9kAsAnZlkUSTeNEHzfOJ/er8D0cyhjcO3MDZ8xYZsUnv6b8+dATFp03RztpIzNOoCD49YcBfpPDG+GAqk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751833893; c=relaxed/simple; bh=gcU+UcYp/914LtP3LulC00fYo+9oiTUvJrVaJpNjKs0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kNflHFqSo5WLoA3iN1qA76MpBQWElb2TXLxlAJRh8KGBIIp0/ZjPMMVztt240YJ4P1XN5E9oCkCqETw+ADjxpNw8a1eQpdBCOw9D6DIm1uON3znNg9NDie+pMl7ty8DV+Qa49FaRivq3I0irS1FOaeCDNNnaWJS5iOE0yQ6Q1W4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mixaill.net; spf=pass smtp.mailfrom=mixaill.net; dkim=pass (2048-bit key) header.d=mixaill.net header.i=@mixaill.net header.b=oOkaxDBu; arc=none smtp.client-ip=144.76.234.135 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mixaill.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mixaill.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mixaill.net header.i=@mixaill.net header.b="oOkaxDBu" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 9086C610CD; Sun, 6 Jul 2025 20:31:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mixaill.net; s=dkim; t=1751833889; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=4VZQYg93SyyXK/wCT2Zksrf8X/INrnR/YJa2agpIGS4=; b=oOkaxDBup5zPxRuKGibrnPkOY5PLlDzenV/37ZtnXdXaAUq73lke9oCFQNx5dIrrRor9jb w10d6N9oU9GEsBqhZA63tkAXr+D/Ga9hemJlK7hZhfHHnlnS1Gtyb8t9xnSZPE5z/v1fJJ 6Me11BCH5sHZnAjaFCOMz/1rQN3AGPjSboOsOVHynX72NV5rHD5eiDlJ2vDPyb9u+tnCmY 0ofw8uOVpwueh1i0GWc+9LscibbW0/7JQEJIjpLwxG32Ou3yRzRzMj4T+O6MZBlVb2uw0F /JCWZEViz5HcuMMcSQGluS4cv/2jZXvPcbHywVrVGI6bLoIv6VJkaginIp1awg== Message-ID: Date: Sun, 6 Jul 2025 23:31:25 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish To: Borislav Petkov Cc: Mario Limonciello , Thomas Gleixner , Ingo Molnar , Dave Hansen , x86@kernel.org, linux-kernel@vger.kernel.org, Rik van Riel References: <20250524145319.209075-1-me@mixaill.net> <20250617200551.GIaFHKnyPV_XsSjlMP@fat_crate.local> <1ebe845b-322b-4929-9093-b41074e9e939@mixaill.net> <20250706170741.GAaGqtXT99yYVoEmCh@fat_crate.local> Content-Language: en-US From: Mikhail Paulyshka In-Reply-To: <20250706170741.GAaGqtXT99yYVoEmCh@fat_crate.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 On 7/6/25 8:07 PM, Borislav Petkov wrote: > Looks like it GPs because CR4.PCID == 0. > > Looks weird, we need to check PCID support somewhere, it seems. > > Ok, let's get a common code base - 6.15. Pls boot it, send me full dmesg again dmesg with vanilla 6.15.0: https://mixaill.net/linux-kernel-lists/bc250_log_invlpgb-2-dmesg.txt > your .config https://raw.githubusercontent.com/openSUSE/kernel-source/4552ba89cbebd55482508c4ba4fc290df58f9386/config/x86_64/vanilla > and the output of cpuid -1r https://mixaill.net/linux-kernel-lists/bc250_log_invlpgb-2-cpuid.txt