linux-kernel - [PATCH v3 15/21] KVM:x86: Report CET MSRs as to-be-saved if CET is supported

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Message-Id: <20230511040857.6094-16-weijiang.yang@intel.com>
Date:   Thu, 11 May 2023 00:08:51 -0400
From:   Yang Weijiang <weijiang.yang@...el.com>
To:     seanjc@...gle.com, pbonzini@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, rppt@...nel.org, binbin.wu@...ux.intel.com,
        rick.p.edgecombe@...el.com, weijiang.yang@...el.com,
        john.allen@....com,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: [PATCH v3 15/21] KVM:x86: Report CET MSRs as to-be-saved if CET is supported

Report CET user mode MSRs, including the synthetic GUEST_SSP MSR,
as to-be-saved MSRs.

Co-developed-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Yang Weijiang <weijiang.yang@...el.com>
---
 arch/x86/kvm/x86.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index baac6acebd40..50026557fb2a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1470,6 +1470,7 @@ static const u32 msrs_to_save_base[] = {
 
 	MSR_IA32_XFD, MSR_IA32_XFD_ERR,
 	MSR_IA32_XSS,
+	MSR_IA32_U_CET, MSR_IA32_PL3_SSP, MSR_KVM_GUEST_SSP,
 };
 
 static const u32 msrs_to_save_pmu[] = {
-- 
2.27.0