From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D0E820A5DD for ; Mon, 27 Oct 2025 14:47:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761576450; cv=none; b=s14jL3YRC40P6Xh5Ax52v8+umAc0X7k0ApCgk5uuBHlK0n0m+FjFlVh9XrWNPylKkCb5gE6ji+aHiQ7fZyAVBF8aVgCT8Iy08Tlecj457C0evtSpDr0Z2sNmeqnRzgX49KDh/5Ujc98RUJNMqowMgTNkrngw7zD2xm02IlggiWY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761576450; c=relaxed/simple; bh=d54ymvisHzmXjFv4QDxxZTk7+5ENCqJM82ifdqOsFHs=; h=Message-ID:Date:MIME-Version:To:Cc:References:Subject:From: In-Reply-To:Content-Type; b=TzeoKHNuQgVLUv6BnPNzh6FTU+wGSlOHRPTEsPCyDFherM9mUUws9TxZat9vpkd42HqQWjTVIn4s/bwqwDoS9yTOk+INTRvZm8V/7pY3GtQa06WdfU6KdyokBjSlpNzLyBPdIkXwX2BV8LdXCWG5smpR2auHdyUpRkSMpgNNEvM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=citrix.com; spf=pass smtp.mailfrom=citrix.com; dkim=pass (1024-bit key) header.d=citrix.com header.i=@citrix.com header.b=jhJudjwO; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=citrix.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=citrix.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=citrix.com header.i=@citrix.com header.b="jhJudjwO" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-4710665e7deso24781015e9.1 for ; Mon, 27 Oct 2025 07:47:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1761576446; x=1762181246; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:subject:references:cc:to:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=d54ymvisHzmXjFv4QDxxZTk7+5ENCqJM82ifdqOsFHs=; b=jhJudjwOCe3mDuQ2pvnYmi78BHWdihqB7gUWds0V/Ln+dksfVPNV2wh/Wg3rC5T3/s 9UsYI/PeBXi+cImIs2727k4AhRPfDZTvUo7ZzU4rvQSdsv5DM6fTEWzfe7BC9xYlnV4C uKEgrDI5gswWosuA1eYOrD9PLvpsk2vuvDbwA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761576446; x=1762181246; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:subject:references:cc:to:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=d54ymvisHzmXjFv4QDxxZTk7+5ENCqJM82ifdqOsFHs=; b=m/z+IyrkUokVehSj42aKIIiiBn8nEJC7B2XnXLA3IpkIqXRsRg8zEu2aqjmi/OxeAz Tgq1PCteHikm43gKKjMiWSYOfL282znx84U+TyWfL8dmxJxesF43aXs1iyE15iJaEzko F9qGKEliWJpfVJ8ggWgDTKd0O5AtHuJxkoquGS1gGiHk9hn97TUyMScU/Noy6H97jfbl lQy99I8HioFPSIjr2aFsUAReE1oWARQegzi1TiETvsLPROQeXcBN6zeIxnLAeGeBFuO4 BMgTz5zejQNX1LPP9yKsok9To0UQ/8QkZx+8zpBp2KMDgGRr7nYAf4UUico5ez77qPBz F2EQ== X-Forwarded-Encrypted: i=1; AJvYcCUlILf2GPS03Whz38hHNECpkhwTV7HxQsP+lMBvfAi2KP4r3fIj0rWKxGPN2woma5m6ezzZ677Ws9lR22A=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2+A+b8N4VS1tzGRsjcdmZ7Zg/mUZy7dH0Eo83Az0zPaEyJjQL tJsHTlFyU/AmM6ZCbDxFwnQqnDcXUsvflg0AHOBCqi4NRbfRiEv59iRGvM8qgAFZLNg= X-Gm-Gg: ASbGncuqUT8OVtc+97s6VOZIkqOKWLca1y3Jihp4m/F/qGei6QK3OfByQgibrblbRHs CL2UBeQCvYLgIasZqd6o8ClqpLinvESkQf6uRbeFIkn/0H2v8QT6X62B6NLjlP3cM0hipc5T0/8 QXVkypWntPp8nlhaNRuJh4F7Oa55cWXFp0rdywON0gjWQpGiP7EpVcMJxtn1apUIWM1dMyb8RXo ApyCVfzufW8YH4ZfdT2IHw7SMb/K6H2nDzHjLXVAoHqQeGN6eZS3xq7r98jYiH1szVKzOu7Sv7B Eq6EyOaxEFOcp9FNW6Fc7uAQ07DrB08iWwg5oEdAVX2ljoWvahlo3gCPIY16Hx2+XQNhs6kT2UR F30dmA40IhBIcGE/P2Uer/qwEjbr1BR1cBONNjGFH80kc4IAj5cTQjHphqF7cw07mJRuUU/hTks iFUayeVcHKQ9mggYs9x3lOSKMt1peixEBQuld5dHHRvtaL3pqwic8NLU3/AZcqdq8= X-Google-Smtp-Source: AGHT+IFlojsMXeKm0Bc6cPj9ZesCvCJlt6jHjHCjtmuU0HyNAETVb0Jar1VIK79GnjKkCwOs5qJYFQ== X-Received: by 2002:a05:600d:4382:b0:46f:b43a:aee1 with SMTP id 5b1f17b1804b1-475d21b04d7mr63331855e9.38.1761576446538; Mon, 27 Oct 2025 07:47:26 -0700 (PDT) Received: from [192.168.1.32] (host-78-149-11-196.as13285.net. [78.149.11.196]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-429952df3c7sm14446015f8f.40.2025.10.27.07.47.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Oct 2025 07:47:25 -0700 (PDT) Message-ID: Date: Mon, 27 Oct 2025 14:47:24 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: bp@kernel.org Cc: bp@alien8.de, linux-kernel@vger.kernel.org, x86@kernel.org References: <20251023124629.5385-1-bp@kernel.org> Subject: Re: [PATCH] x86/microcode/AMD: Limit Entrysign signature checking to known generations Content-Language: en-GB From: Andrew Cooper Autocrypt: addr=andrew.cooper3@citrix.com; keydata= xsFNBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABzSlBbmRyZXcgQ29v cGVyIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPsLBegQTAQgAJAIbAwULCQgHAwUVCgkI CwUWAgMBAAIeAQIXgAUCWKD95wIZAQAKCRBlw/kGpdefoHbdD/9AIoR3k6fKl+RFiFpyAhvO 59ttDFI7nIAnlYngev2XUR3acFElJATHSDO0ju+hqWqAb8kVijXLops0gOfqt3VPZq9cuHlh IMDquatGLzAadfFx2eQYIYT+FYuMoPZy/aTUazmJIDVxP7L383grjIkn+7tAv+qeDfE+txL4 SAm1UHNvmdfgL2/lcmL3xRh7sub3nJilM93RWX1Pe5LBSDXO45uzCGEdst6uSlzYR/MEr+5Z JQQ32JV64zwvf/aKaagSQSQMYNX9JFgfZ3TKWC1KJQbX5ssoX/5hNLqxMcZV3TN7kU8I3kjK mPec9+1nECOjjJSO/h4P0sBZyIUGfguwzhEeGf4sMCuSEM4xjCnwiBwftR17sr0spYcOpqET ZGcAmyYcNjy6CYadNCnfR40vhhWuCfNCBzWnUW0lFoo12wb0YnzoOLjvfD6OL3JjIUJNOmJy RCsJ5IA/Iz33RhSVRmROu+TztwuThClw63g7+hoyewv7BemKyuU6FTVhjjW+XUWmS/FzknSi dAG+insr0746cTPpSkGl3KAXeWDGJzve7/SBBfyznWCMGaf8E2P1oOdIZRxHgWj0zNr1+ooF /PzgLPiCI4OMUttTlEKChgbUTQ+5o0P080JojqfXwbPAyumbaYcQNiH1/xYbJdOFSiBv9rpt TQTBLzDKXok86M7BTQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz7bkPtXaGb9H4 Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82tIlP/EbmRbDVn 7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswuda1JH3/qvYu0p vjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrsm/oCBiVW/OgU g/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL36UtK/uFyEuPy wwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6O/n8poQHbaTd 6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefAIFfHBg7fTY/i kBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2bXsLQYRj2xqd1 bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV04unbsKVXWZAk uAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXedMcAEQEAAcLB XwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMxYWd3FXHThrVQ HgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITrgKWXDDUWGYxd pnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2IXYmuW+e5KCA vTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLUO83sh6OZhJkk b9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR5HHF0NLIJhgg 4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdSXuvY3AHJd4CP 4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5dcQPzUiuHLK9i nvjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFusyhbZrI0U9tJ B8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9Sl9IAKFu29RSo d5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK14JdDDHUX2Rs 6+ahAA== In-Reply-To: <20251023124629.5385-1-bp@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit > Limit Entrysign sha256 signature checking to CPUs in the range Zen1-Zen5. > > ... > +static bool cpu_has_entrysign(void) +{ + unsigned int fam = > x86_family(bsp_cpuid_1_eax); + unsigned int model = > x86_model(bsp_cpuid_1_eax); + + if (fam == 0x17) + return true; + + if > (fam == 0x19) { + if (model <= 0x2f || + (0x40 <= model && model <= > 0x4f) || + (0x60 <= model && model <= 0x6f)) + return true; + } + + > return false; +} That's Zen1-3.  It's Fam 0x1a you need to split to separate Zen5 and 6. ~Andrew