From: "Yang, Sheng" <sheng.yang@intel.com>
To: kvm@vger.kernel.org
Subject: [PATCH][REPOST] KVM: VMX: Fix a wrong usage of vmcs_config
Date: Wed, 25 Jun 2008 16:41:54 +0800 [thread overview]
Message-ID: <200806251641.54445.sheng.yang@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 1551 bytes --]
From a1c929709718c015686b0c23046cc08b8bc47a62 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@intel.com>
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 <sheng.yang@intel.com>
---
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
[-- Attachment #2: 0001-KVM-VMX-Fix-a-wrong-usage-of-vmcs_config.patch --]
[-- Type: text/x-diff, Size: 1548 bytes --]
From a1c929709718c015686b0c23046cc08b8bc47a62 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@intel.com>
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 <sheng.yang@intel.com>
---
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
next reply other threads:[~2008-06-25 8:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 8:41 Yang, Sheng [this message]
2008-06-25 12:05 ` [PATCH][REPOST] KVM: VMX: Fix a wrong usage of vmcs_config Avi Kivity
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