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authorAvi Kivity <avi@redhat.com>2010-11-22 17:53:26 +0200
committerAvi Kivity <avi@redhat.com>2011-01-12 11:29:59 +0200
commitab9ae3138789afacd133a9c4b3d7a3f1578e25c7 (patch)
tree27c81b48c395dffd2049b37bafef940573ae6841
parent35d3d4a1dd2c1ffd6f2481f6d8ad6c358bb22f07 (diff)
KVM: Push struct x86_exception info the various gva_to_gpa variants
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/x86/include/asm/kvm_host.h14
-rw-r--r--arch/x86/kvm/mmu.c13
-rw-r--r--arch/x86/kvm/paging_tmpl.h19
-rw-r--r--arch/x86/kvm/x86.c52
4 files changed, 51 insertions, 47 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 14524781de13..9980a2484624 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -245,7 +245,7 @@ struct kvm_mmu {
void (*inject_page_fault)(struct kvm_vcpu *vcpu);
void (*free)(struct kvm_vcpu *vcpu);
gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
- u32 *error);
+ struct x86_exception *exception);
gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
void (*prefetch_page)(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *page);
@@ -708,10 +708,14 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
int kvm_mmu_load(struct kvm_vcpu *vcpu);
void kvm_mmu_unload(struct kvm_vcpu *vcpu);
void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
-gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
+gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception);
int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 53ff31f3dc6f..9ce041469a8e 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2567,18 +2567,19 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
}
static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
- u32 access, u32 *error)
+ u32 access, struct x86_exception *exception)
{
- if (error)
- *error = 0;
+ if (exception)
+ exception->error_code = 0;
return vaddr;
}
static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr,
- u32 access, u32 *error)
+ u32 access,
+ struct x86_exception *exception)
{
- if (error)
- *error = 0;
+ if (exception)
+ exception->error_code = 0;
return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access);
}
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 2b3d66c7b68d..3ac39de444ec 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -677,7 +677,7 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
}
static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
- u32 *error)
+ struct x86_exception *exception)
{
struct guest_walker walker;
gpa_t gpa = UNMAPPED_GVA;
@@ -688,14 +688,18 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
if (r) {
gpa = gfn_to_gpa(walker.gfn);
gpa |= vaddr & ~PAGE_MASK;
- } else if (error)
- *error = walker.error_code;
+ } else if (exception) {
+ exception->vector = PF_VECTOR;
+ exception->error_code_valid = true;
+ exception->error_code = walker.error_code;
+ }
return gpa;
}
static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
- u32 access, u32 *error)
+ u32 access,
+ struct x86_exception *exception)
{
struct guest_walker walker;
gpa_t gpa = UNMAPPED_GVA;
@@ -706,8 +710,11 @@ static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
if (r) {
gpa = gfn_to_gpa(walker.gfn);
gpa |= vaddr & ~PAGE_MASK;
- } else if (error)
- *error = walker.error_code;
+ } else if (exception) {
+ exception->vector = PF_VECTOR;
+ exception->error_code_valid = true;
+ exception->error_code = walker.error_code;
+ }
return gpa;
}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8311ed909c49..a7a7decba43f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3603,51 +3603,47 @@ static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
{
gpa_t t_gpa;
- u32 error;
+ struct x86_exception exception;
BUG_ON(!mmu_is_nested(vcpu));
/* NPT walks are always user-walks */
access |= PFERR_USER_MASK;
- t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &error);
+ t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception);
if (t_gpa == UNMAPPED_GVA)
vcpu->arch.fault.nested = true;
return t_gpa;
}
-gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception)
{
u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
- return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+ return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
}
- gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+ gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception)
{
u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
access |= PFERR_FETCH_MASK;
- return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+ return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
}
-gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception)
{
u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
access |= PFERR_WRITE_MASK;
- return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+ return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
}
/* uses this to access any guest's mapped memory without checking CPL */
-gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
-{
- return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, error);
-}
-
-static int make_page_fault(struct x86_exception *exception, u32 error)
+gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
+ struct x86_exception *exception)
{
- exception->vector = PF_VECTOR;
- exception->error_code_valid = true;
- exception->error_code = error;
- return X86EMUL_PROPAGATE_FAULT;
+ return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception);
}
static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
@@ -3656,17 +3652,16 @@ static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
{
void *data = val;
int r = X86EMUL_CONTINUE;
- u32 error;
while (bytes) {
gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access,
- &error);
+ exception);
unsigned offset = addr & (PAGE_SIZE-1);
unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
int ret;
if (gpa == UNMAPPED_GVA)
- return make_page_fault(exception, error);
+ return X86EMUL_PROPAGATE_FAULT;
ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
if (ret < 0) {
r = X86EMUL_IO_NEEDED;
@@ -3715,18 +3710,17 @@ static int kvm_write_guest_virt_system(gva_t addr, void *val,
{
void *data = val;
int r = X86EMUL_CONTINUE;
- u32 error;
while (bytes) {
gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr,
PFERR_WRITE_MASK,
- &error);
+ exception);
unsigned offset = addr & (PAGE_SIZE-1);
unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
int ret;
if (gpa == UNMAPPED_GVA)
- return make_page_fault(exception, error);
+ return X86EMUL_PROPAGATE_FAULT;
ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
if (ret < 0) {
r = X86EMUL_IO_NEEDED;
@@ -3748,7 +3742,6 @@ static int emulator_read_emulated(unsigned long addr,
struct kvm_vcpu *vcpu)
{
gpa_t gpa;
- u32 error_code;
if (vcpu->mmio_read_completed) {
memcpy(val, vcpu->mmio_data, bytes);
@@ -3758,10 +3751,10 @@ static int emulator_read_emulated(unsigned long addr,
return X86EMUL_CONTINUE;
}
- gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code);
+ gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, exception);
if (gpa == UNMAPPED_GVA)
- return make_page_fault(exception, error_code);
+ return X86EMUL_PROPAGATE_FAULT;
/* For APIC access vmexit */
if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
@@ -3810,12 +3803,11 @@ static int emulator_write_emulated_onepage(unsigned long addr,
struct kvm_vcpu *vcpu)
{
gpa_t gpa;
- u32 error_code;
- gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code);
+ gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, exception);
if (gpa == UNMAPPED_GVA)
- return make_page_fault(exception, error_code);
+ return X86EMUL_PROPAGATE_FAULT;
/* For APIC access vmexit */
if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)