From: Zhang Xiantao <[EMAIL PROTECTED]>
Using kvm arch support to replace kvm_x86_ops, and make them
arch-independent.
Signed-off-by: Zhang Xiantao <[EMAIL PROTECTED]>
---
drivers/kvm/kvm.h | 18 +++++++
drivers/kvm/kvm_main.c | 78 +++++++-----------------------
drivers/kvm/x86.c | 127
++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 163 insertions(+), 60 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 6498324..6c797ea 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -649,6 +649,24 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run);
__init void kvm_arch_init(void);
+int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
+
+void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_decache(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
+void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
+struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int
id);
+void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu);
+
+int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
+void kvm_arch_hardware_enable(void *garbage);
+void kvm_arch_hardware_disable(void *garbage);
+int kvm_arch_hardware_setup(void);
+void kvm_arch_hardware_unsetup(void);
+void kvm_arch_check_processor_compat(void *rtn);
+
+
static inline void kvm_guest_enter(void)
{
account_system_vtime(current);
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 71a3b7a..6a109e8 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -124,13 +124,8 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm
*kvm, unsigned id)
mutex_init(&vcpu->mutex);
vcpu->cpu = -1;
- vcpu->mmu.root_hpa = INVALID_PAGE;
vcpu->kvm = kvm;
vcpu->vcpu_id = id;
- if (!irqchip_in_kernel(kvm) || id == 0)
- vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
- else
- vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
init_waitqueue_head(&vcpu->wq);
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
@@ -140,29 +135,11 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct
kvm *kvm, unsigned id)
}
vcpu->run = page_address(page);
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page) {
- r = -ENOMEM;
+ r = kvm_arch_vcpu_init(vcpu);
+ if (r < 0)
goto fail_free_run;
- }
- vcpu->pio_data = page_address(page);
-
- r = kvm_mmu_create(vcpu);
- if (r < 0)
- goto fail_free_pio_data;
-
- if (irqchip_in_kernel(kvm)) {
- r = kvm_create_lapic(vcpu);
- if (r < 0)
- goto fail_mmu_destroy;
- }
-
return 0;
-fail_mmu_destroy:
- kvm_mmu_destroy(vcpu);
-fail_free_pio_data:
- free_page((unsigned long)vcpu->pio_data);
fail_free_run:
free_page((unsigned long)vcpu->run);
fail:
@@ -172,9 +149,7 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_init);
void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
{
- kvm_free_lapic(vcpu);
- kvm_mmu_destroy(vcpu);
- free_page((unsigned long)vcpu->pio_data);
+ kvm_arch_vcpu_uninit(vcpu);
free_page((unsigned long)vcpu->run);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
@@ -240,7 +215,7 @@ static void kvm_free_vcpus(struct kvm *kvm)
kvm_unload_vcpu_mmu(kvm->vcpus[i]);
for (i = 0; i < KVM_MAX_VCPUS; ++i) {
if (kvm->vcpus[i]) {
- kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
+ kvm_arch_vcpu_free(kvm->vcpus[i]);
kvm->vcpus[i] = NULL;
}
}
@@ -901,28 +876,17 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm
*kvm, int n)
if (!valid_vcpu(n))
return -EINVAL;
- vcpu = kvm_x86_ops->vcpu_create(kvm, n);
- if (IS_ERR(vcpu))
+ vcpu = kvm_arch_vcpu_create(kvm, n);
+ if (IS_ERR(vcpu))
return PTR_ERR(vcpu);
preempt_notifier_init(&vcpu->preempt_notifier,
&kvm_preempt_ops);
- /* We do fxsave: this must be aligned. */
- BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
-
- vcpu_load(vcpu);
- r = kvm_x86_ops->vcpu_reset(vcpu);
- if (r == 0)
- r = kvm_mmu_setup(vcpu);
- vcpu_put(vcpu);
- if (r < 0)
- goto free_vcpu;
-
mutex_lock(&kvm->lock);
if (kvm->vcpus[n]) {
r = -EEXIST;
mutex_unlock(&kvm->lock);
- goto mmu_unload;
+ goto vcpu_destroy;
}
kvm->vcpus[n] = vcpu;
mutex_unlock(&kvm->lock);
@@ -937,14 +901,8 @@ unlink:
mutex_lock(&kvm->lock);
kvm->vcpus[n] = NULL;
mutex_unlock(&kvm->lock);
-
-mmu_unload:
- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-
-free_vcpu:
- kvm_x86_ops->vcpu_free(vcpu);
+vcpu_destroy:
+ kvm_arch_vcpu_destory(vcpu);
return r;
}
@@ -1308,7 +1266,7 @@ static void decache_vcpus_on_cpu(int cpu)
*/
if (mutex_trylock(&vcpu->mutex)) {
if (vcpu->cpu == cpu) {
- kvm_x86_ops->vcpu_decache(vcpu);
+ kvm_arch_vcpu_decache(vcpu);
vcpu->cpu = -1;
}
mutex_unlock(&vcpu->mutex);
@@ -1324,7 +1282,7 @@ static void hardware_enable(void *junk)
if (cpu_isset(cpu, cpus_hardware_enabled))
return;
cpu_set(cpu, cpus_hardware_enabled);
- kvm_x86_ops->hardware_enable(NULL);
+ kvm_arch_hardware_enable(NULL);
}
static void hardware_disable(void *junk)
@@ -1335,7 +1293,7 @@ static void hardware_disable(void *junk)
return;
cpu_clear(cpu, cpus_hardware_enabled);
decache_vcpus_on_cpu(cpu);
- kvm_x86_ops->hardware_disable(NULL);
+ kvm_arch_hardware_disable(NULL);
}
static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned
long val,
@@ -1501,7 +1459,7 @@ static void kvm_sched_in(struct preempt_notifier
*pn, int cpu)
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
- kvm_x86_ops->vcpu_load(vcpu, cpu);
+ kvm_arch_vcpu_load(vcpu, cpu);
}
static void kvm_sched_out(struct preempt_notifier *pn,
@@ -1509,7 +1467,7 @@ static void kvm_sched_out(struct preempt_notifier
*pn,
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
- kvm_x86_ops->vcpu_put(vcpu);
+ kvm_arch_vcpu_put(vcpu);
}
int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
@@ -1534,13 +1492,13 @@ int kvm_init_x86(struct kvm_x86_ops *ops,
unsigned int vcpu_size,
kvm_x86_ops = ops;
- r = kvm_x86_ops->hardware_setup();
+ r = kvm_arch_hardware_setup();
if (r < 0)
goto out;
for_each_online_cpu(cpu) {
smp_call_function_single(cpu,
-
kvm_x86_ops->check_processor_compatibility,
+ kvm_arch_check_processor_compat,
&r, 0, 1);
if (r < 0)
goto out_free_0;
@@ -1595,7 +1553,7 @@ out_free_2:
out_free_1:
on_each_cpu(hardware_disable, NULL, 0, 1);
out_free_0:
- kvm_x86_ops->hardware_unsetup();
+ kvm_arch_hardware_unsetup();
out:
kvm_x86_ops = NULL;
return r;
@@ -1611,7 +1569,7 @@ void kvm_exit_x86(void)
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
on_each_cpu(hardware_disable, NULL, 0, 1);
- kvm_x86_ops->hardware_unsetup();
+ kvm_arch_hardware_unsetup();
kvm_x86_ops = NULL;
}
EXPORT_SYMBOL_GPL(kvm_exit_x86);
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 92c0988..2e0fded 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -2320,3 +2320,130 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
fx_restore(&vcpu->host_fx_image);
}
EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
+
+void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
+{
+ kvm_x86_ops->vcpu_free(vcpu);
+}
+
+void kvm_arch_vcpu_decache(struct kvm_vcpu *vcpu)
+{
+ kvm_x86_ops->vcpu_decache(vcpu);
+}
+
+struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
+ unsigned int id)
+{
+ int r;
+ struct kvm_vcpu *vcpu = kvm_x86_ops->vcpu_create(kvm, id);
+
+ if (IS_ERR(vcpu)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ /* We do fxsave: this must be aligned. */
+ BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
+
+ vcpu_load(vcpu);
+ r = kvm_arch_vcpu_reset(vcpu);
+ if (r == 0)
+ r = kvm_mmu_setup(vcpu);
+ vcpu_put(vcpu);
+ if (r < 0)
+ goto free_vcpu;
+
+ return vcpu;
+free_vcpu:
+ kvm_x86_ops->vcpu_free(vcpu);
+fail:
+ return ERR_PTR(r);
+}
+
+void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu)
+{
+ vcpu_load(vcpu);
+ kvm_mmu_unload(vcpu);
+ vcpu_put(vcpu);
+
+ kvm_x86_ops->vcpu_free(vcpu);
+}
+
+int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
+{
+ return kvm_x86_ops->vcpu_reset(vcpu);
+}
+
+void kvm_arch_hardware_enable(void *garbage)
+{
+ kvm_x86_ops->hardware_enable(garbage);
+}
+
+void kvm_arch_hardware_disable(void *garbage)
+{
+ kvm_x86_ops->hardware_disable(garbage);
+}
+
+int kvm_arch_hardware_setup(void)
+{
+ return kvm_x86_ops->hardware_setup();
+}
+
+void kvm_arch_hardware_unsetup(void)
+{
+ kvm_x86_ops->hardware_unsetup();
+}
+
+void kvm_arch_check_processor_compat(void *rtn)
+{
+ kvm_x86_ops->check_processor_compatibility(rtn);
+}
+
+int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
+{
+ struct page *page;
+ struct kvm *kvm;
+ int r;
+
+ BUG_ON(vcpu->kvm == NULL);
+ kvm = vcpu->kvm;
+
+ vcpu->mmu.root_hpa = INVALID_PAGE;
+ if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
+ vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
+ else
+ vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
+
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ vcpu->pio_data = page_address(page);
+
+ r = kvm_mmu_create(vcpu);
+ if (r < 0)
+ goto fail_free_pio_data;
+
+ if (irqchip_in_kernel(kvm)) {
+ r = kvm_create_lapic(vcpu);
+ if (r < 0)
+ goto fail_mmu_destroy;
+ }
+
+ return 0;
+
+fail_mmu_destroy:
+ kvm_mmu_destroy(vcpu);
+fail_free_pio_data:
+ free_page((unsigned long)vcpu->pio_data);
+fail:
+ return r;
+}
+
+void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+ kvm_free_lapic(vcpu);
+ kvm_mmu_destroy(vcpu);
+ free_page((unsigned long)vcpu->pio_data);
+}
--
1.5.1.2
-------------------------------------------------------------------------
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