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KVM: add ioctls to save/store mpstate

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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>
This commit is contained in:
Marcelo Tosatti 2008-04-11 13:24:45 -03:00 committed by Avi Kivity
parent a45352908b
commit 62d9f0dbc9
7 changed files with 86 additions and 5 deletions
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12
arch/ia64/kvm/kvm-ia64.c
View file

@ -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;
}

12
arch/s390/kvm/kvm-s390.c
View file

@ -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);

19
arch/x86/kvm/x86.c
View file

@ -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)
{

5
include/asm-x86/kvm_host.h
View file

@ -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;

15
include/linux/kvm.h
View file

@ -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

4
include/linux/kvm_host.h
View file

@ -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);

24
virt/kvm/kvm_main.c
View file

@ -979,6 +979,30 @@ static long kvm_vcpu_ioctl(struct file *filp,
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;