So userspace can save/restore the mpstate during migration.
Signed-off-by: Marcelo Tosatti <[EMAIL PROTECTED]>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cb57b6a..2ce22d6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -814,6 +814,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_CLOCKSOURCE:
case KVM_CAP_PIT:
case KVM_CAP_NOP_IO_DELAY:
+ case KVM_CAP_MP_STATE:
r = 1;
break;
case KVM_CAP_VAPIC:
@@ -3057,6 +3058,24 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
return 0;
}
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ int *mp_state)
+{
+ vcpu_load(vcpu);
+ *mp_state = vcpu->arch.mp_state;
+ vcpu_put(vcpu);
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ int *mp_state)
+{
+ vcpu_load(vcpu);
+ vcpu->arch.mp_state = *mp_state;
+ vcpu_put(vcpu);
+ return 0;
+}
+
static void set_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg)
{
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 37b963e..23f65ba 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -279,6 +279,7 @@ struct kvm_s390_interrupt {
#define KVM_CAP_PIT 11
#define KVM_CAP_NOP_IO_DELAY 12
#define KVM_CAP_PV_MMU 13
+#define KVM_CAP_MP_STATE 14
/*
* ioctls for VM fds
@@ -340,5 +341,7 @@ struct kvm_s390_interrupt {
#define KVM_S390_SET_INITIAL_PSW _IOW(KVMIO, 0x96, struct kvm_s390_psw)
/* initial reset for s390 */
#define KVM_S390_INITIAL_RESET _IO(KVMIO, 0x97)
+#define KVM_GET_MP_STATE _IO(KVMIO, 0x98)
+#define KVM_SET_MP_STATE _IO(KVMIO, 0x99)
#endif
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index a2ceb51..9ced073 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -224,6 +224,10 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ int *mp_state);
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ int *mp_state);
int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
struct kvm_debug_guest *dbg);
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 3396a5f..95001da 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -924,6 +924,30 @@ out_free2:
r = 0;
break;
}
+ case KVM_GET_MP_STATE: {
+ int mp_state;
+
+ r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &mp_state, sizeof (int)))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_MP_STATE: {
+ int mp_state;
+
+ r = -EFAULT;
+ if (copy_from_user(&mp_state, argp, sizeof (int)))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
case KVM_TRANSLATE: {
struct kvm_translation tr;
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