From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id A80289A2D4 for ; Wed, 17 May 2023 09:34:25 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 9276624945 for ; Wed, 17 May 2023 09:34:25 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Wed, 17 May 2023 09:34:24 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 6960C453F1 for ; Wed, 17 May 2023 09:34:24 +0200 (CEST) Date: Wed, 17 May 2023 09:34:17 +0200 From: Fabian =?iso-8859-1?q?Gr=FCnbichler?= To: Proxmox VE development discussion References: <20230517070246.660939-1-aderumier@odiso.com> In-Reply-To: <20230517070246.660939-1-aderumier@odiso.com> MIME-Version: 1.0 User-Agent: astroid/0.16.0 (https://github.com/astroidmail/astroid) Message-Id: <1684308750.d03m3tvuwp.astroid@yuna.none> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-SPAM-LEVEL: Spam detection results: 0 AWL 0.074 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 SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_SCC_BODY_TEXT_LINE -0.01 - URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [gnu.org] Subject: Re: [pve-devel] [PATCH-SERIES qemu/qemu-server/manager 0/1] add and set x86-64-v2 as default model for new vms 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: , X-List-Received-Date: Wed, 17 May 2023 07:34:25 -0000 On May 17, 2023 9:02 am, Alexandre Derumier wrote: > Hi, >=20 > we used kvm64 as default cpumodel since the begin of proxmox. (basically,= it's like a pentium4 cpu flags). >=20 > New distros like rhel9 are compiled to use more modern cpu flags. > (and windows already use new flags since year, and we already add some ex= tra cpu flags) >=20 > " > In 2020, AMD, Intel, Red Hat, and SUSE worked together to define > three microarchitecture levels on top of the historical x86-64 > baseline: >=20 > * x86-64: original x86_64 baseline instruction set > * x86-64-v2: vector instructions up to Streaming SIMD > Extensions 4.2 (SSE4.2) and Supplemental > Streaming SIMD Extensions 3 (SSSE3), the > POPCNT instruction, and CMPXCHG16B > * x86-64-v3: vector instructions up to AVX2, MOVBE, > and additional bit-manipulation instructions. > * x86-64-v4: vector instructions from some of the > AVX-512 variants. >=20 > " >=20 >=20 > (x86-64 is kvm64/qemu64 cpu model). >=20 > This patch series add new models (patch was found on qemu mailing, but ne= ver appplied). >=20 > "x86-64-abiX" : (as vX are reserved in qemu for revision versioning) >=20 > https://lore.kernel.org/all/20210526144038.278899-1-berrange@redhat.com/T= / FWIW, there was a v3: https://lists.gnu.org/archive/html/qemu-devel/2021-06= /msg01591.html (20210607135843.196595-1-berrange@redhat.com) that has some more discussion/information (only the doc table + script to generate it have been applied it seems).