From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 606B5E7543E for ; Tue, 3 Oct 2023 09:40:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239693AbjJCJkl (ORCPT ); Tue, 3 Oct 2023 05:40:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239685AbjJCJki (ORCPT ); Tue, 3 Oct 2023 05:40:38 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6F3BAB; Tue, 3 Oct 2023 02:40:33 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id a640c23a62f3a-9adb9fa7200so146734466b.0; Tue, 03 Oct 2023 02:40:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1696326032; x=1696930832; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=7CyRh4kQaOdknBgWyMmgJve4C/+MYGcjkmbGU4vHGSk=; b=kAfxjOXRzPLD6U/MqWsJxEV75CpMQ2EeQL/sgjpAp7oXcijS2KRX0bxfNhjpn8YI3o DUcJ7hFQO3USCu1f4V+q3I3RHSDR1GozmzP6V+sa8Jyybz75Rv80ZwPx372bDPAYlgNS otvCQ8GBjGT+JDOdqYI/OjsGGK+80zjq0YKobOMREw204NwUwicLuorEWXm3ELjuxlNT kG8N355kzRXTUmegxjQhchAOfNGtcIXsify0tr0DOPeMv7TRSmzyAN/7jH9ddqI3zg7r BFogMdMAhSNvvHV+uz7nRvlM3fxc1RZjHQjcFuKqB3rNxU1ScjNHsTbhVDkGI1HAlbHz ueGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696326032; x=1696930832; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7CyRh4kQaOdknBgWyMmgJve4C/+MYGcjkmbGU4vHGSk=; b=gF7BUGI+2bA/s6OR6bNsR+dF6jA2RMsarGpJVyITzwHKg09ln4EACcGu0+9DGKA0AH na8caODF3jEBQiKKliPQsypqBciM/nnC3ZyVKpeQZd9u9ZPNDEfAOv1VYH3C2OcKeEzR qW3i26XIO1Lsv15FwH8+Hw5C0Nz+f0Gtn15GMgIHvtEtsjhHKafQ6X5LnGq6iC3/Wnb/ glIOF1ZBbZu+lsWNV4J66ay5wBPMltteOjDukmqzGUAJeEjPuXG+rPCxuohwyWTRvNh8 fG0MpJfk30K9GUJ2/223HI0y+cPD/bGVkKX/RAbxOtkUF3ZKhcIfgg03xzjPWNGSFWhh J+0g== X-Gm-Message-State: AOJu0Yyzo3Z1RcWuC1RrXBhBo+H8QTIwS6ADsFc5/zROAt9opDqVPX5N FsYTMCKycnxGZgrsEFREq8g= X-Google-Smtp-Source: AGHT+IEn38FV2RHMM1HqKtteE6m3acfP4+wNwDoKg0nQehp6GxiyBRTrcI2FUoRcydg3Xdprf5qxBQ== X-Received: by 2002:a17:906:6a10:b0:9ad:8641:e91b with SMTP id qw16-20020a1709066a1000b009ad8641e91bmr1730320ejc.11.1696326031915; Tue, 03 Oct 2023 02:40:31 -0700 (PDT) Received: from gmail.com (1F2EF530.nat.pool.telekom.hu. [31.46.245.48]) by smtp.gmail.com with ESMTPSA id h14-20020a170906590e00b00992b2c55c67sm760112ejq.156.2023.10.03.02.40.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 02:40:31 -0700 (PDT) Sender: Ingo Molnar Date: Tue, 3 Oct 2023 11:40:29 +0200 From: Ingo Molnar To: Jinank Jain Cc: seanjc@google.com, pbonzini@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, jinankjain@microsoft.com, thomas.lendacky@amd.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, wei.liu@kernel.org, tiala@microsoft.com Subject: Re: [PATCH] arch/x86: Set XSS while handling #VC intercept for CPUID Message-ID: References: <20231003092835.18974-1-jinankjain@linux.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231003092835.18974-1-jinankjain@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org * Jinank Jain wrote: > According to [1], while handling the #VC intercept for CPUID leaf > 0x0000_000D, we need to supply the value of XSS in the GHCB page. If > this value is not provided then a spec compliant hypervisor can fail the > GHCB request and kill the guest. > > [1] https://www.amd.com/system/files/TechDocs/56421-guest-hypervisor-communication-block-standardization.pdf URL doesn't seem to exist, I get redirected to AMD's 404 page. Thanks, Ingo