linux-kernel - [PATCH 1/3] KVM: x86: remove bogus #GP injection

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Date:   Mon, 14 Dec 2020 13:32:48 -0500
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Alexander Graf <graf@...zon.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: [PATCH 1/3] KVM: x86: remove bogus #GP injection

There is no need to inject a #GP from kvm_mtrr_set_msr, kvm_emulate_wrmsr will
handle it.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/mtrr.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c
index 7f0059aa30e1..f472fdb6ae7e 100644
--- a/arch/x86/kvm/mtrr.c
+++ b/arch/x86/kvm/mtrr.c
@@ -84,12 +84,8 @@ bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 	} else
 		/* MTRR mask */
 		mask |= 0x7ff;
-	if (data & mask) {
-		kvm_inject_gp(vcpu, 0);
-		return false;
-	}
 
-	return true;
+	return (data & mask) == 0;
 }
 EXPORT_SYMBOL_GPL(kvm_mtrr_valid);
 
-- 
2.26.2