From patchwork Fri Jun 21 06:51:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Xu X-Patchwork-Id: 11008491 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 75C8914E5 for ; Fri, 21 Jun 2019 06:54:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 655EB1FF82 for ; Fri, 21 Jun 2019 06:54:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 598AA28481; Fri, 21 Jun 2019 06:54:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA6A62843B for ; Fri, 21 Jun 2019 06:54:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726174AbfFUGyO (ORCPT ); Fri, 21 Jun 2019 02:54:14 -0400 Received: from mga12.intel.com ([192.55.52.136]:37411 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726138AbfFUGyO (ORCPT ); Fri, 21 Jun 2019 02:54:14 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jun 2019 23:54:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,399,1557212400"; d="scan'208";a="335735536" Received: from tao-optiplex-7060.sh.intel.com ([10.239.13.104]) by orsmga005.jf.intel.com with ESMTP; 20 Jun 2019 23:54:11 -0700 From: Tao Xu To: pbonzini@redhat.com, rth@twiddle.net, ehabkost@redhat.com, cohuck@redhat.com, mst@redhat.com, mtosatti@redhat.com Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, tao3.xu@intel.com, jingqi.liu@intel.com, xiaoyao.li@linux.intel.com Subject: [PATCH RESEND v3 2/2] target/i386: Add support for save/load IA32_UMWAIT_CONTROL MSR Date: Fri, 21 Jun 2019 14:51:34 +0800 Message-Id: <20190621065134.7392-3-tao3.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190621065134.7392-1-tao3.xu@intel.com> References: <20190621065134.7392-1-tao3.xu@intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP UMWAIT and TPAUSE instructions use IA32_UMWAIT_CONTROL at MSR index E1H to determines the maximum time in TSC-quanta that the processor can reside in either C0.1 or C0.2. This patch is to Add support for save/load IA32_UMWAIT_CONTROL MSR in guest. Co-developed-by: Jingqi Liu Signed-off-by: Jingqi Liu Signed-off-by: Tao Xu --- Changes in v3: Resend to update the dependcy KVM link: https://lkml.org/lkml/2019/6/21/23 --- target/i386/cpu.h | 2 ++ target/i386/kvm.c | 13 +++++++++++++ target/i386/machine.c | 20 ++++++++++++++++++++ 3 files changed, 35 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 2f7c57a3c2..eb98b2e54a 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -450,6 +450,7 @@ typedef enum X86Seg { #define MSR_IA32_BNDCFGS 0x00000d90 #define MSR_IA32_XSS 0x00000da0 +#define MSR_IA32_UMWAIT_CONTROL 0xe1 #define XSTATE_FP_BIT 0 #define XSTATE_SSE_BIT 1 @@ -1348,6 +1349,7 @@ typedef struct CPUX86State { uint16_t fpregs_format_vmstate; uint64_t xss; + uint64_t umwait; TPRAccess tpr_access_type; } CPUX86State; diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 3efdb90f11..506c7cd038 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -91,6 +91,7 @@ static bool has_msr_hv_stimer; static bool has_msr_hv_frequencies; static bool has_msr_hv_reenlightenment; static bool has_msr_xss; +static bool has_msr_umwait; static bool has_msr_spec_ctrl; static bool has_msr_virt_ssbd; static bool has_msr_smi_count; @@ -1486,6 +1487,9 @@ static int kvm_get_supported_msrs(KVMState *s) case MSR_IA32_XSS: has_msr_xss = true; break; + case MSR_IA32_UMWAIT_CONTROL: + has_msr_umwait = true; + break; case HV_X64_MSR_CRASH_CTL: has_msr_hv_crash = true; break; @@ -2023,6 +2027,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level) if (has_msr_xss) { kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss); } + if (has_msr_umwait) { + kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, env->umwait); + } if (has_msr_spec_ctrl) { kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, env->spec_ctrl); } @@ -2416,6 +2423,9 @@ static int kvm_get_msrs(X86CPU *cpu) if (has_msr_xss) { kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0); } + if (has_msr_umwait) { + kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, 0); + } if (has_msr_spec_ctrl) { kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); } @@ -2665,6 +2675,9 @@ static int kvm_get_msrs(X86CPU *cpu) case MSR_IA32_XSS: env->xss = msrs[i].data; break; + case MSR_IA32_UMWAIT_CONTROL: + env->umwait = msrs[i].data; + break; default: if (msrs[i].index >= MSR_MC0_CTL && msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { diff --git a/target/i386/machine.c b/target/i386/machine.c index 4aff1a763f..db388b6b85 100644 --- a/target/i386/machine.c +++ b/target/i386/machine.c @@ -810,6 +810,25 @@ static const VMStateDescription vmstate_xss = { } }; +static bool umwait_needed(void *opaque) +{ + X86CPU *cpu = opaque; + CPUX86State *env = &cpu->env; + + return env->umwait != 0; +} + +static const VMStateDescription vmstate_umwait = { + .name = "cpu/umwait", + .version_id = 1, + .minimum_version_id = 1, + .needed = umwait_needed, + .fields = (VMStateField[]) { + VMSTATE_UINT64(env.umwait, X86CPU), + VMSTATE_END_OF_LIST() + } +}; + #ifdef TARGET_X86_64 static bool pkru_needed(void *opaque) { @@ -1100,6 +1119,7 @@ VMStateDescription vmstate_x86_cpu = { &vmstate_msr_hyperv_reenlightenment, &vmstate_avx512, &vmstate_xss, + &vmstate_umwait, &vmstate_tsc_khz, &vmstate_msr_smi_count, #ifdef TARGET_X86_64