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 X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B22ECC48BC2 for ; Fri, 25 Jun 2021 14:22:25 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 74FED61939 for ; Fri, 25 Jun 2021 14:22:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74FED61939 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37846 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lwmiu-000355-M0 for qemu-devel@archiver.kernel.org; Fri, 25 Jun 2021 10:22:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60624) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lwmf7-0002r6-FU for qemu-devel@nongnu.org; Fri, 25 Jun 2021 10:18:29 -0400 Received: from mail-ej1-x62a.google.com ([2a00:1450:4864:20::62a]:34791) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lwmf5-00037g-72 for qemu-devel@nongnu.org; Fri, 25 Jun 2021 10:18:29 -0400 Received: by mail-ej1-x62a.google.com with SMTP id hz1so15401287ejc.1 for ; Fri, 25 Jun 2021 07:18:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=nv0ACy0+Eum8qUTT1PI/Lvp1yQqi/xZRGLjc430QOSY=; b=udDyx2JNrDKXoGqenNS8ya2t4SQNFMP1D1udgDF0T4oLw6duBkcD03szO75sDeQ2nH c6oDfjdnVdL0H3asTO2a6MTc4OLoKqajLhgXmjxm2jv85pKI95AJeeGOwUm8AMwg5fJn qLM2kyVaYsT/2d0f57iocCLALPqXNOMFoc8HCxsJa5c9+JwKXeCx1pmIgTNp2G6lXFr6 cQePEEICdn4DewLTBtICLm1LMQJXV6bUcCvsIN4lf5JRs/U+vtywCrKCkC/vuOJGP6ZK 96cpJxVcmq5eh5vUj3iWHoyGp0TwrzuSZzkNBRh/wYGRYtSU27IN5t6/Otu1dJuYd6rx tRTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=nv0ACy0+Eum8qUTT1PI/Lvp1yQqi/xZRGLjc430QOSY=; b=hNDrzzsSOayE0DMWZ7TXyyNOYKuQAjx1n25NjTnoFQvK25KrPo3JhqompEW6Na95LE Xf1VohWYLiLmMIVh0nMyRT22QGr2K6qx+SAnogX8/LQYpW1HRSmEtonAJJoPyHDm59lc 4QTKDbD2kJ6+tqnAKZwXpuwfIaN8IzJWNK5t/HvBuERfQFNdMBiOd0yXSyERKYPXgNph n+cAz6ty7aFAeqMcNBtWSStfamJNNOWoH+Yi32Ggr/NpFwPb89aKDbczSdGEx3GM1XLe f6z5Fp3m8MwKNdtMEzZdrcLr9t/oxGvx+iorevbKq3xE0fL6XUPL3/W1YJQZA3OwyNpU d08g== X-Gm-Message-State: AOAM532Vo53pmdKJcQ8EJs9vB2m13/f3RMiPxz1OPkk8+aEbzfa3WGiy Jl0Byu6WUJNRGLy3aXMNb358+s6Yr/A= X-Google-Smtp-Source: ABdhPJwnlzj1zzk2IBZS61ROvKTe3YW+wC2dN9e5qa/ju8Ae6jgVDRKU2aYO7086B5cqFauaYUtGGg== X-Received: by 2002:a17:906:dbd8:: with SMTP id yc24mr11178881ejb.55.1624630704926; Fri, 25 Jun 2021 07:18:24 -0700 (PDT) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id c28sm326579ejc.102.2021.06.25.07.18.24 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Jun 2021 07:18:24 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 01/28] target/i386: kvm: add support for TSC scaling Date: Fri, 25 Jun 2021 16:17:55 +0200 Message-Id: <20210625141822.1368639-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210625141822.1368639-1-pbonzini@redhat.com> References: <20210625141822.1368639-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::62a; envelope-from=paolo.bonzini@gmail.com; helo=mail-ej1-x62a.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Linux 5.14 will add support for nested TSC scaling. Add the corresponding feature in QEMU; to keep support for existing kernels, do not add it to any processor yet. The handling of the VMCS enumeration MSR is ugly; once we have more than one case, we may want to add a table to check VMX features against. Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 2 +- target/i386/cpu.h | 1 + target/i386/kvm/kvm.c | 12 ++++++++---- 3 files changed, 10 insertions(+), 5 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index a9fe1662d3..d8f3ab3192 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1031,7 +1031,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "vmx-invpcid-exit", "vmx-vmfunc", "vmx-shadow-vmcs", "vmx-encls-exit", "vmx-rdseed-exit", "vmx-pml", NULL, NULL, "vmx-xsaves", NULL, NULL, NULL, - NULL, NULL, NULL, NULL, + NULL, "vmx-tsc-scaling", NULL, NULL, NULL, NULL, NULL, NULL, }, .msr = { diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 1e11071d81..f7fa5870b1 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -972,6 +972,7 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define VMX_SECONDARY_EXEC_RDSEED_EXITING 0x00010000 #define VMX_SECONDARY_EXEC_ENABLE_PML 0x00020000 #define VMX_SECONDARY_EXEC_XSAVES 0x00100000 +#define VMX_SECONDARY_EXEC_TSC_SCALING 0x02000000 #define VMX_PIN_BASED_EXT_INTR_MASK 0x00000001 #define VMX_PIN_BASED_NMI_EXITING 0x00000008 diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index ad950c3c27..04e4ec063f 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -2700,8 +2700,6 @@ static uint64_t make_vmx_msr_value(uint32_t index, uint32_t features) return must_be_one | (((uint64_t)can_be_one) << 32); } -#define VMCS12_MAX_FIELD_INDEX (0x17) - static void kvm_msr_entry_add_vmx(X86CPU *cpu, FeatureWordArray f) { uint64_t kvm_vmx_basic = @@ -2791,8 +2789,14 @@ static void kvm_msr_entry_add_vmx(X86CPU *cpu, FeatureWordArray f) CR0_PE_MASK | CR0_PG_MASK | CR0_NE_MASK); kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR4_FIXED0, CR4_VMXE_MASK); - kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, - VMCS12_MAX_FIELD_INDEX << 1); + + if (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_TSC_SCALING) { + /* TSC multiplier (0x2032). */ + kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x32); + } else { + /* Preemption timer (0x482E). */ + kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x2E); + } } static void kvm_msr_entry_add_perf(X86CPU *cpu, FeatureWordArray f) -- 2.31.1