[PATCH][REPOST] KVM: VMX: Fix a wrong usage of vmcs_config

[Yang, Sheng]

From a1c929709718c015686b0c23046cc08b8bc47a62 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[EMAIL PROTECTED]>
Date: Wed, 18 Jun 2008 14:43:38 +0800
Subject: [PATCH] KVM: VMX: Fix a wrong usage of vmcs_config

The function ept_update_paging_mode_cr0() write to
CPU_BASED_VM_EXEC_CONTROL based on vmcs_config.cpu_based_exec_ctrl. That's
wrong because the variable may not consistent with the content in the
CPU_BASE_VM_EXEC_CONTROL MSR.

Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
 arch/x86/kvm/vmx.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e4278d..6a31406 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1438,7 +1438,7 @@ static void ept_update_paging_mode_cr0(unsigned long 
*hw_cr0,
        if (!(cr0 & X86_CR0_PG)) {
                /* From paging/starting to nonpaging */
                vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
-                            vmcs_config.cpu_based_exec_ctrl |
+                            vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
                             (CPU_BASED_CR3_LOAD_EXITING |
                              CPU_BASED_CR3_STORE_EXITING));
                vcpu->arch.cr0 = cr0;
@@ -1448,7 +1448,7 @@ static void ept_update_paging_mode_cr0(unsigned long 
*hw_cr0,
        } else if (!is_paging(vcpu)) {
                /* From nonpaging to paging */
                vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
-                            vmcs_config.cpu_based_exec_ctrl &
+                            vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
                             ~(CPU_BASED_CR3_LOAD_EXITING |
                               CPU_BASED_CR3_STORE_EXITING));
                vcpu->arch.cr0 = cr0;
--
1.5.5


From a1c929709718c015686b0c23046cc08b8bc47a62 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[EMAIL PROTECTED]>
Date: Wed, 18 Jun 2008 14:43:38 +0800
Subject: [PATCH] KVM: VMX: Fix a wrong usage of vmcs_config

The function ept_update_paging_mode_cr0() write to
CPU_BASED_VM_EXEC_CONTROL based on vmcs_config.cpu_based_exec_ctrl. That's
wrong because the variable may not consistent with the content in the
CPU_BASE_VM_EXEC_CONTROL MSR.

Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
 arch/x86/kvm/vmx.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e4278d..6a31406 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1438,7 +1438,7 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
 	if (!(cr0 & X86_CR0_PG)) {
 		/* From paging/starting to nonpaging */
 		vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
-			     vmcs_config.cpu_based_exec_ctrl |
+			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
 			     (CPU_BASED_CR3_LOAD_EXITING |
 			      CPU_BASED_CR3_STORE_EXITING));
 		vcpu->arch.cr0 = cr0;
@@ -1448,7 +1448,7 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
 	} else if (!is_paging(vcpu)) {
 		/* From nonpaging to paging */
 		vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
-			     vmcs_config.cpu_based_exec_ctrl &
+			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
 			     ~(CPU_BASED_CR3_LOAD_EXITING |
 			       CPU_BASED_CR3_STORE_EXITING));
 		vcpu->arch.cr0 = cr0;
-- 
1.5.5