* [PATCH][REPOST] KVM: VMX: Add ept_sync_context in flush_tlb
@ 2008-06-25 8:42 Yang, Sheng
0 siblings, 0 replies; only message in thread
From: Yang, Sheng @ 2008-06-25 8:42 UTC (permalink / raw)
To: kvm
[-- Attachment #1: Type: text/plain, Size: 2480 bytes --]
From 54dc26e44f1c0aa460bef409b799f36dae56a911 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@intel.com>
Date: Wed, 18 Jun 2008 11:23:13 +0800
Subject: [PATCH] KVM: VMX: Add ept_sync_context in flush_tlb
Fix a potention issue caused by kvm_mmu_slot_remove_write_access().
The old behavior don't sync EPT TLB with modified EPT entry, which
result in inconsistent content of EPT TLB and EPT table.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
---
arch/x86/kvm/vmx.c | 18 ++++++++++++------
1 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e4278d..5e2a800 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -83,6 +83,7 @@ struct vcpu_vmx {
} irq;
} rmode;
int vpid;
+ u64 eptp;
};
static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
@@ -364,24 +365,24 @@ static inline void ept_sync_global(void)
__invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
}
-static inline void ept_sync_context(u64 eptp)
+static inline void ept_sync_context(struct vcpu_vmx *vmx)
{
if (vm_need_ept()) {
if (cpu_has_vmx_invept_context())
- __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
+ __invept(VMX_EPT_EXTENT_CONTEXT, vmx->eptp, 0);
else
ept_sync_global();
}
}
-static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
+static inline void ept_sync_individual_addr(struct vcpu_vmx *vmx,
gpa_t gpa)
{
if (vm_need_ept()) {
if (cpu_has_vmx_invept_individual_addr())
__invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
- eptp, gpa);
+ vmx->eptp, gpa);
else
- ept_sync_context(eptp);
+ ept_sync_context(vmx);
}
}
@@ -1407,6 +1408,8 @@ static void exit_lmode(struct kvm_vcpu *vcpu)
static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
{
vpid_sync_vcpu_all(to_vmx(vcpu));
+ if (vm_need_ept())
+ ept_sync_context(to_vmx(vcpu));
}
static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
@@ -1517,12 +1520,15 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu,
unsigned long cr3)
{
unsigned long guest_cr3;
u64 eptp;
+ struct vcpu_vmx *vmx;
+ vmx = to_vmx(vcpu);
guest_cr3 = cr3;
if (vm_need_ept()) {
eptp = construct_eptp(cr3);
vmcs_write64(EPT_POINTER, eptp);
- ept_sync_context(eptp);
+ vmx->eptp = eptp;
+ ept_sync_context(vmx);
ept_load_pdptrs(vcpu);
guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
VMX_EPT_IDENTITY_PAGETABLE_ADDR;
--
1.5.5
[-- Attachment #2: 0001-KVM-VMX-Add-ept_sync_context-in-flush_tlb.patch --]
[-- Type: text/x-diff, Size: 2481 bytes --]
From 54dc26e44f1c0aa460bef409b799f36dae56a911 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@intel.com>
Date: Wed, 18 Jun 2008 11:23:13 +0800
Subject: [PATCH] KVM: VMX: Add ept_sync_context in flush_tlb
Fix a potention issue caused by kvm_mmu_slot_remove_write_access(). The
old behavior don't sync EPT TLB with modified EPT entry, which result
in inconsistent content of EPT TLB and EPT table.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
---
arch/x86/kvm/vmx.c | 18 ++++++++++++------
1 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e4278d..5e2a800 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -83,6 +83,7 @@ struct vcpu_vmx {
} irq;
} rmode;
int vpid;
+ u64 eptp;
};
static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
@@ -364,24 +365,24 @@ static inline void ept_sync_global(void)
__invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
}
-static inline void ept_sync_context(u64 eptp)
+static inline void ept_sync_context(struct vcpu_vmx *vmx)
{
if (vm_need_ept()) {
if (cpu_has_vmx_invept_context())
- __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
+ __invept(VMX_EPT_EXTENT_CONTEXT, vmx->eptp, 0);
else
ept_sync_global();
}
}
-static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
+static inline void ept_sync_individual_addr(struct vcpu_vmx *vmx, gpa_t gpa)
{
if (vm_need_ept()) {
if (cpu_has_vmx_invept_individual_addr())
__invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
- eptp, gpa);
+ vmx->eptp, gpa);
else
- ept_sync_context(eptp);
+ ept_sync_context(vmx);
}
}
@@ -1407,6 +1408,8 @@ static void exit_lmode(struct kvm_vcpu *vcpu)
static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
{
vpid_sync_vcpu_all(to_vmx(vcpu));
+ if (vm_need_ept())
+ ept_sync_context(to_vmx(vcpu));
}
static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
@@ -1517,12 +1520,15 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
unsigned long guest_cr3;
u64 eptp;
+ struct vcpu_vmx *vmx;
+ vmx = to_vmx(vcpu);
guest_cr3 = cr3;
if (vm_need_ept()) {
eptp = construct_eptp(cr3);
vmcs_write64(EPT_POINTER, eptp);
- ept_sync_context(eptp);
+ vmx->eptp = eptp;
+ ept_sync_context(vmx);
ept_load_pdptrs(vcpu);
guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
VMX_EPT_IDENTITY_PAGETABLE_ADDR;
--
1.5.5
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