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authorMarcelo Tosatti <mtosatti@redhat.com>2008-04-11 13:24:45 -0300
committerAvi Kivity <avi@qumranet.com>2008-04-27 18:21:16 +0300
commit62d9f0dbc92d7e398fde53fc6021338393522e68 (patch)
tree028e62807ead3db11f15694323743b90c8211ef8
parenta45352908b88d383bc40e1e4d1a6cc5bbcefc895 (diff)
downloadlinux-62d9f0dbc92d7e398fde53fc6021338393522e68.tar.gz
KVM: add ioctls to save/store mpstate
So userspace can save/restore the mpstate during migration. [avi: export the #define constants describing the value] [christian: add s390 stubs] [avi: ditto for ia64] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
-rw-r--r--arch/ia64/kvm/kvm-ia64.c12
-rw-r--r--arch/s390/kvm/kvm-s390.c12
-rw-r--r--arch/x86/kvm/x86.c19
-rw-r--r--include/asm-x86/kvm_host.h5
-rw-r--r--include/linux/kvm.h15
-rw-r--r--include/linux/kvm_host.h4
-rw-r--r--virt/kvm/kvm_main.c24
7 files changed, 86 insertions, 5 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index f7589dba75a..6df07324013 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1792,3 +1792,15 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
}
+
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -EINVAL;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -EINVAL;
+}
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d9661376597..98d1e73e01f 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -414,6 +414,18 @@ int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
return -EINVAL; /* not implemented yet */
}
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -EINVAL; /* not implemented yet */
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -EINVAL; /* not implemented yet */
+}
+
static void __vcpu_run(struct kvm_vcpu *vcpu)
{
memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b364d192896..5c3c9d38c78 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -817,6 +817,7 @@ 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:
@@ -3083,6 +3084,24 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
return 0;
}
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ vcpu_load(vcpu);
+ mp_state->mp_state = vcpu->arch.mp_state;
+ vcpu_put(vcpu);
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ vcpu_load(vcpu);
+ vcpu->arch.mp_state = 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/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index f35a6ad43c0..9d963cd6533 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -227,11 +227,6 @@ struct kvm_vcpu_arch {
u64 shadow_efer;
u64 apic_base;
struct kvm_lapic *apic; /* kernel irqchip context */
-#define KVM_MP_STATE_RUNNABLE 0
-#define KVM_MP_STATE_UNINITIALIZED 1
-#define KVM_MP_STATE_INIT_RECEIVED 2
-#define KVM_MP_STATE_SIPI_RECEIVED 3
-#define KVM_MP_STATE_HALTED 4
int mp_state;
int sipi_vector;
u64 ia32_misc_enable_msr;
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index d302d63517e..f8e211d8ce8 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -228,6 +228,18 @@ struct kvm_vapic_addr {
__u64 vapic_addr;
};
+/* for KVM_SET_MPSTATE */
+
+#define KVM_MP_STATE_RUNNABLE 0
+#define KVM_MP_STATE_UNINITIALIZED 1
+#define KVM_MP_STATE_INIT_RECEIVED 2
+#define KVM_MP_STATE_HALTED 3
+#define KVM_MP_STATE_SIPI_RECEIVED 4
+
+struct kvm_mp_state {
+ __u32 mp_state;
+};
+
struct kvm_s390_psw {
__u64 mask;
__u64 addr;
@@ -326,6 +338,7 @@ struct kvm_trace_rec {
#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
@@ -387,5 +400,7 @@ struct kvm_trace_rec {
#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 _IOR(KVMIO, 0x98, struct kvm_mp_state)
+#define KVM_SET_MP_STATE _IOW(KVMIO, 0x99, struct kvm_mp_state)
#endif
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 0bc400387ca..81d4c3305a2 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -237,6 +237,10 @@ 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,
+ struct kvm_mp_state *mp_state);
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *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 47cbc6e3faf..09984557490 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -979,6 +979,30 @@ out_free2:
r = 0;
break;
}
+ case KVM_GET_MP_STATE: {
+ struct kvm_mp_state 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 mp_state))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_MP_STATE: {
+ struct kvm_mp_state mp_state;
+
+ r = -EFAULT;
+ if (copy_from_user(&mp_state, argp, sizeof mp_state))
+ 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;