All of lore.kernel.org
 help / color / mirror / Atom feed
From: Yang Weijiang <weijiang.yang@intel.com>
To: pbonzini@redhat.com, jmattson@google.com, seanjc@google.com,
	vkuznets@redhat.com, wei.w.wang@intel.com,
	like.xu.linux@gmail.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
	Yang Weijiang <weijiang.yang@intel.com>
Subject: [PATCH v7 08/15] KVM: x86: Report XSS as an MSR to be saved if there are supported features
Date: Fri,  6 Aug 2021 15:42:18 +0800	[thread overview]
Message-ID: <1628235745-26566-9-git-send-email-weijiang.yang@intel.com> (raw)
In-Reply-To: <1628235745-26566-1-git-send-email-weijiang.yang@intel.com>

From: Sean Christopherson <sean.j.christopherson@intel.com>

Add MSR_IA32_XSS to the list of MSRs reported to userspace if
supported_xss is non-zero, i.e. KVM supports at least one XSS based
feature.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
Message-Id: <20210203113421.5759-2-weijiang.yang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/x86.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 08a58ef8bec2..2ebb05212652 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1328,6 +1328,7 @@ static const u32 msrs_to_save_all[] = {
 	MSR_ARCH_PERFMON_EVENTSEL0 + 14, MSR_ARCH_PERFMON_EVENTSEL0 + 15,
 	MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17,
 	MSR_ARCH_LBR_CTL, MSR_ARCH_LBR_DEPTH,
+	MSR_IA32_XSS,
 };
 
 static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)];
@@ -6238,6 +6239,10 @@ static void kvm_init_msr_list(void)
 			if (!kvm_cpu_cap_has(X86_FEATURE_ARCH_LBR))
 				continue;
 			break;
+		case MSR_IA32_XSS:
+			if (!supported_xss)
+				continue;
+			break;
 		default:
 			break;
 		}
-- 
2.25.1


  parent reply	other threads:[~2021-08-06  7:29 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06  7:42 [PATCH v7 00/15] Introduce Architectural LBR for vPMU Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 01/15] perf/x86/intel: Fix the comment about guest LBR support on KVM Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 02/15] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 03/15] KVM: x86: Add Arch LBR MSRs to msrs_to_save_all list Yang Weijiang
2021-08-09 13:07   ` Like Xu
2021-08-06  7:42 ` [PATCH v7 04/15] KVM: vmx/pmu: Emulate MSR_ARCH_LBR_DEPTH for guest Arch LBR Yang Weijiang
2021-08-09 13:16   ` Like Xu
2021-08-10  7:38     ` Yang Weijiang
2021-08-10  7:54       ` Like Xu
2021-08-10  9:08         ` Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 05/15] KVM: vmx/pmu: Emulate MSR_ARCH_LBR_CTL " Yang Weijiang
2021-08-06 16:26   ` kernel test robot
2021-08-06 16:26     ` kernel test robot
2021-08-09 13:36   ` Like Xu
2021-08-10  8:30     ` Yang Weijiang
2021-08-10  8:37       ` Like Xu
2021-08-06  7:42 ` [PATCH v7 06/15] KVM: x86/pmu: Refactor code to support " Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 07/15] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2021-08-06  7:42 ` Yang Weijiang [this message]
2021-08-06  7:42 ` [PATCH v7 09/15] KVM: x86: Refine the matching and clearing logic for supported_xss Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 10/15] KVM: x86: Add XSAVE Support for Architectural LBR Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 11/15] KVM: x86/vmx: Check Arch LBR config when return perf capabilities Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 12/15] KVM: nVMX: Add necessary Arch LBR settings for nested VM Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 13/15] KVM: x86/vmx: Clear Arch LBREn bit before inject #DB to guest Yang Weijiang
2021-08-09  5:08   ` Like Xu
2021-08-09  9:02     ` Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 14/15] KVM: x86/vmx: Flip Arch LBREn bit on guest state change Yang Weijiang
2021-08-06  7:42 ` [PATCH v7 15/15] KVM: x86/cpuid: Advise Arch LBR feature in CPUID Yang Weijiang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1628235745-26566-9-git-send-email-weijiang.yang@intel.com \
    --to=weijiang.yang@intel.com \
    --cc=jmattson@google.com \
    --cc=kvm@vger.kernel.org \
    --cc=like.xu.linux@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pbonzini@redhat.com \
    --cc=sean.j.christopherson@intel.com \
    --cc=seanjc@google.com \
    --cc=vkuznets@redhat.com \
    --cc=wei.w.wang@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.