KVM: VMX: Add cpu consistency check
All the physical CPUs on the board should support the same VMX feature
set. Add check_processor_compatibility to kvm_arch_ops for the consistency
check.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 5dee302..2be6b1c 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -3102,6 +3102,7 @@
struct module *module)
{
int r;
+ int cpu;
if (kvm_arch_ops) {
printk(KERN_ERR "kvm: already loaded the other module\n");
@@ -3123,6 +3124,14 @@
if (r < 0)
goto out;
+ for_each_online_cpu(cpu) {
+ smp_call_function_single(cpu,
+ kvm_arch_ops->check_processor_compatibility,
+ &r, 0, 1);
+ if (r < 0)
+ goto out_free_0;
+ }
+
on_each_cpu(hardware_enable, NULL, 0, 1);
r = register_cpu_notifier(&kvm_cpu_notifier);
if (r)
@@ -3169,6 +3178,7 @@
unregister_cpu_notifier(&kvm_cpu_notifier);
out_free_1:
on_each_cpu(hardware_disable, NULL, 0, 1);
+out_free_0:
kvm_arch_ops->hardware_unsetup();
out:
kvm_arch_ops = NULL;