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From: nadav.amit@gmail.com
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, Nadav Amit <nadav.amit@gmail.com>
Subject: [PATCH] x86: Fix allowed IA32_VMX_VMCS_ENUM values
Date: Mon, 15 Apr 2019 15:21:04 -0700	[thread overview]
Message-ID: <20190415222104.21367-1-nadav.amit@gmail.com> (raw)

From: Nadav Amit <nadav.amit@gmail.com>

According to the SDM, IA32_VMX_VMCS_ENUM indicates to software the
highest index value used in the encoding of any field supported by the
processor: Bits 9:1 contain the highest index value used for any VMCS
encoding.

Signed-off-by: Nadav Amit <nadav.amit@gmail.com>
---
 x86/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x86/vmx.c b/x86/vmx.c
index 6ba56bc..f713ada 100644
--- a/x86/vmx.c
+++ b/x86/vmx.c
@@ -1470,7 +1470,7 @@ static void test_vmx_caps(void)
 
 	val = rdmsr(MSR_IA32_VMX_VMCS_ENUM);
 	report("MSR_IA32_VMX_VMCS_ENUM",
-	       (val & 0x3e) >= 0x2a &&
+	       (val & 0x1fe) >= 0x2a &&
 	       (val & 0xfffffffffffffc01Ull) == 0);
 
 	val = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP);
-- 
2.17.1


             reply	other threads:[~2019-04-15 22:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-15 22:21 nadav.amit [this message]
2019-04-15 23:29 ` [PATCH] x86: Fix allowed IA32_VMX_VMCS_ENUM values Sean Christopherson
2019-04-16  8:28 ` Paolo Bonzini

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