linux-kernel - [PATCH 2/2] KVM: x86: Propagate AMD-specific IBRS related bits

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Message-ID: <20230227210526.83182-3-itazur@amazon.com>
Date:   Mon, 27 Feb 2023 21:05:26 +0000
From:   Takahiro Itazuri <itazur@...zon.com>
To:     <kvm@...r.kernel.org>, <x86@...nel.org>
CC:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        <linux-kernel@...r.kernel.org>,
        "Takahiro Itazuri" <zulinx86@...il.com>,
        Takahiro Itazuri <itazur@...zon.com>
Subject: [PATCH 2/2] KVM: x86: Propagate AMD-specific IBRS related bits

Add AMD-specific IBRS related bits to be propagated to guests.

Signed-off-by: Takahiro Itazuri <itazur@...zon.com>
---
 arch/x86/kvm/cpuid.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 596061c1610e..829ca79076df 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -704,8 +704,9 @@ void kvm_set_cpu_caps(void)
 	kvm_cpu_cap_mask(CPUID_8000_0008_EBX,
 		F(CLZERO) | F(XSAVEERPTR) |
 		F(WBNOINVD) | F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) |
-		F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) |
-		__feature_bit(KVM_X86_FEATURE_AMD_PSFD)
+		F(AMD_SSB_NO) | F(AMD_STIBP) | F(X86_FEATURE_AMD_IBRS_ALWAYS_ON) |
+		F(AMD_STIBP_ALWAYS_ON) | F(X86_FEATURE_AMD_IBRS_PREFERRED) |
+		F(X86_FEATURE_AMD_IBRS_SAME_MODE) | __feature_bit(KVM_X86_FEATURE_AMD_PSFD)
 	);
 
 	/*
-- 
2.38.0