linux-kernel - [PATCH] KVM: VMX: Fix vm entry failure caused by invalid vmexit controls

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Message-Id: <20190122152952.8011-1-changbin.du@gmail.com>
Date:   Tue, 22 Jan 2019 23:29:52 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     pbonzini@...hat.com
Cc:     rkrcmar@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Changbin Du <changbin.du@...il.com>
Subject: [PATCH] KVM: VMX: Fix vm entry failure caused by invalid vmexit controls

The commit c73da3f ("KVM: VMX: Properly handle dynamic VM Entry/Exit
controls") has a typo that cause invalid vmexit controls. The
VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL is against _vmentry_control.

KVM: entry failed, hardware error 0x7
EAX=00000000 EBX=00000000 ECX=00000000 EDX=000206c2
ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 00000000 0000ffff 00009300
CS =f000 ffff0000 0000ffff 00009b00
SS =0000 00000000 0000ffff 00009300
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT= 00000000 0000ffff
IDT= 00000000 0000ffff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000

Fixes: c73da3f ("KVM: VMX: Properly handle dynamic VM Entry/Exit controls")
Signed-off-by: Changbin Du <changbin.du@...il.com>
---
 arch/x86/kvm/vmx/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index f6915f10e584..0762fcab8fc9 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2344,7 +2344,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
 		case 37: /* AAT100 */
 		case 44: /* BC86,AAY89,BD102 */
 		case 46: /* BA97 */
-			_vmexit_control &= ~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
+			_vmentry_control &= ~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
 			_vmexit_control &= ~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
 			pr_warn_once("kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL "
 					"does not work properly. Using workaround\n");
-- 
2.19.1