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Diffstat (limited to 'arch/x86/kvm/mmu.c')
-rw-r--r--arch/x86/kvm/mmu.c41
1 files changed, 33 insertions, 8 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8f12ec52ad86..3b91227969a5 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -974,7 +974,7 @@ static void nonpaging_new_cr3(struct kvm_vcpu *vcpu)
{
}
-static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
+static int __nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
{
int level = PT32E_ROOT_LEVEL;
hpa_t table_addr = vcpu->arch.mmu.root_hpa;
@@ -1015,6 +1015,17 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
}
}
+static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
+{
+ int r;
+
+ mutex_lock(&vcpu->kvm->lock);
+ r = __nonpaging_map(vcpu, v, write, gfn);
+ mutex_unlock(&vcpu->kvm->lock);
+ return r;
+}
+
+
static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *sp)
{
@@ -1031,6 +1042,7 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu)
if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
return;
+ mutex_lock(&vcpu->kvm->lock);
#ifdef CONFIG_X86_64
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) {
hpa_t root = vcpu->arch.mmu.root_hpa;
@@ -1038,6 +1050,7 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu)
sp = page_header(root);
--sp->root_count;
vcpu->arch.mmu.root_hpa = INVALID_PAGE;
+ mutex_unlock(&vcpu->kvm->lock);
return;
}
#endif
@@ -1051,6 +1064,7 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu)
}
vcpu->arch.mmu.pae_root[i] = INVALID_PAGE;
}
+ mutex_unlock(&vcpu->kvm->lock);
vcpu->arch.mmu.root_hpa = INVALID_PAGE;
}
@@ -1250,15 +1264,15 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
{
int r;
- mutex_lock(&vcpu->kvm->lock);
r = mmu_topup_memory_caches(vcpu);
if (r)
goto out;
+ mutex_lock(&vcpu->kvm->lock);
mmu_alloc_roots(vcpu);
+ mutex_unlock(&vcpu->kvm->lock);
kvm_x86_ops->set_cr3(vcpu, vcpu->arch.mmu.root_hpa);
kvm_mmu_flush_tlb(vcpu);
out:
- mutex_unlock(&vcpu->kvm->lock);
return r;
}
EXPORT_SYMBOL_GPL(kvm_mmu_load);
@@ -1353,6 +1367,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
int npte;
pgprintk("%s: gpa %llx bytes %d\n", __FUNCTION__, gpa, bytes);
+ mutex_lock(&vcpu->kvm->lock);
++vcpu->kvm->stat.mmu_pte_write;
kvm_mmu_audit(vcpu, "pre pte write");
if (gfn == vcpu->arch.last_pt_write_gfn
@@ -1421,17 +1436,27 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
}
}
kvm_mmu_audit(vcpu, "post pte write");
+ mutex_unlock(&vcpu->kvm->lock);
}
int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
{
- gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gva);
+ gpa_t gpa;
+ int r;
- return kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
+ down_read(&current->mm->mmap_sem);
+ gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gva);
+ up_read(&current->mm->mmap_sem);
+
+ mutex_lock(&vcpu->kvm->lock);
+ r = kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
+ mutex_unlock(&vcpu->kvm->lock);
+ return r;
}
void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
{
+ mutex_lock(&vcpu->kvm->lock);
while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES) {
struct kvm_mmu_page *sp;
@@ -1440,6 +1465,7 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
kvm_mmu_zap_page(vcpu->kvm, sp);
++vcpu->kvm->stat.mmu_recycled;
}
+ mutex_unlock(&vcpu->kvm->lock);
}
int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
@@ -1447,7 +1473,6 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
int r;
enum emulation_result er;
- mutex_lock(&vcpu->kvm->lock);
r = vcpu->arch.mmu.page_fault(vcpu, cr2, error_code);
if (r < 0)
goto out;
@@ -1462,7 +1487,6 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
goto out;
er = emulate_instruction(vcpu, vcpu->run, cr2, error_code, 0);
- mutex_unlock(&vcpu->kvm->lock);
switch (er) {
case EMULATE_DONE:
@@ -1477,7 +1501,6 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
BUG();
}
out:
- mutex_unlock(&vcpu->kvm->lock);
return r;
}
EXPORT_SYMBOL_GPL(kvm_mmu_page_fault);
@@ -1574,8 +1597,10 @@ void kvm_mmu_zap_all(struct kvm *kvm)
{
struct kvm_mmu_page *sp, *node;
+ mutex_lock(&kvm->lock);
list_for_each_entry_safe(sp, node, &kvm->arch.active_mmu_pages, link)
kvm_mmu_zap_page(kvm, sp);
+ mutex_unlock(&kvm->lock);
kvm_flush_remote_tlbs(kvm);
}