From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id 0ECC11FF143 for ; Mon, 19 Jan 2026 17:37:00 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 5A7E0244CB; Mon, 19 Jan 2026 17:37:06 +0100 (CET) Message-ID: <657e1ed2-4f93-4974-8d4d-8fdedbee6d26@proxmox.com> Date: Mon, 19 Jan 2026 17:36:31 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Proxmox VE development discussion , Fiona Ebner References: <20260119160122.177390-1-f.ebner@proxmox.com> Content-Language: en-US From: Markus Frank In-Reply-To: <20260119160122.177390-1-f.ebner@proxmox.com> X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1768840538167 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.001 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pve-devel] [PATCH common/qemu-server 0/2] vm start: catch outdated Zen 5 firmware X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Proxmox VE development discussion Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: pve-devel-bounces@lists.proxmox.com Sender: "pve-devel" Hi, On 2026-01-19 17:01, Fiona Ebner wrote: > NOTE: Needs to still be tested on an actually affected system! I tested both patches with the kernel 6.17.9 on my affected system (Ryzen 9 9900X, Gigabyte X870 AORUS ELITE WIFI7, Firmware-Version: F8). Without the patches I get this error with kernel 6.17.9 when using CPU type 'EPYC': kvm: warning: host doesn't support requested feature: CPUID[eax=07h,ecx=00h].EBX.rdseed [bit 18] kvm: Host doesn't support requested features TASK ERROR: start failed: QEMU exited with code 1 With the patches applied I get the same error with more context: kvm: warning: host doesn't support requested feature: CPUID[eax=07h,ecx=00h].EBX.rdseed [bit 18] WARN: On Zen 5 systems, the rdseed CPU flag might not be available when the CPU firmware is outdated. See: https://security-tracker.debian.org/tracker/CVE-2025-62626 https://pve.proxmox.com/pve-docs/chapter-sysadmin.html#sysadmin_firmware_cpu kvm: Host doesn't support requested features TASK ERROR: start failed: QEMU exited with code 1 Tested-by: Markus Frank > > With the 6.17.9 kernel, the rdseed feature bit is not available for > some Zen 5 host CPUs anymore unless the firmware is new enough. QEMU > will complain about the missing feature bit upon VM start. Add some > context to the QEMU error message if the host is Zen 5 (or 6, same CPU > family number, but the warning message already states 'Zen 5' > explicitly and probably the feature bit won't be missing in the first > place). > > pve-common: > > Fiona Ebner (1): > procfs tools: cpuinfo: also return CPU vendor and family > > src/PVE/ProcFSTools.pm | 6 ++++++ > 1 file changed, 6 insertions(+) > > > qemu-server: > > Fiona Ebner (1): > vm start: catch outdated Zen 5 firmware > > src/PVE/QemuServer.pm | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > > Summary over all repositories: > 2 files changed, 19 insertions(+), 0 deletions(-) > _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel