From: Janosch Frank <frankja@xxxxxxxxxxxxx>
For protected VMs, the VCPU resets are done by the Ultravisor, as KVM
has no access to the VCPU registers.
Note that the ultravisor will only accept a call for the exact reset
that has been requested.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
[borntraeger@xxxxxxxxxx: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
arch/s390/include/asm/uv.h | 6 ++++++
arch/s390/kvm/kvm-s390.c | 20 ++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index d59825d95b9d..d4fb54231932 100644
--- a/arch/s390/include/asm/uv.h
+++ b/arch/s390/include/asm/uv.h
@@ -36,7 +36,10 @@
#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
#define UVC_CMD_UNPACK_IMG 0x0301
#define UVC_CMD_VERIFY_IMG 0x0302
+#define UVC_CMD_CPU_RESET 0x0310
+#define UVC_CMD_CPU_RESET_INITIAL 0x0311
#define UVC_CMD_PREPARE_RESET 0x0320
+#define UVC_CMD_CPU_RESET_CLEAR 0x0321
#define UVC_CMD_CPU_SET_STATE 0x0330
#define UVC_CMD_SET_UNSHARE_ALL 0x0340
#define UVC_CMD_PIN_PAGE_SHARED 0x0341
@@ -59,8 +62,11 @@ enum uv_cmds_inst {
BIT_UVC_CMD_SET_SEC_PARMS = 11,
BIT_UVC_CMD_UNPACK_IMG = 13,
BIT_UVC_CMD_VERIFY_IMG = 14,
+ BIT_UVC_CMD_CPU_RESET = 15,
+ BIT_UVC_CMD_CPU_RESET_INITIAL = 16,
BIT_UVC_CMD_CPU_SET_STATE = 17,
BIT_UVC_CMD_PREPARE_RESET = 18,
+ BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19,
BIT_UVC_CMD_UNSHARE_ALL = 20,
BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 16af4d1a2c29..932f7f32e82f 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -4695,6 +4695,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
void __user *argp = (void __user *)arg;
int idx;
long r;
+ u16 rc, rrc;
vcpu_load(vcpu);
@@ -4716,14 +4717,33 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
case KVM_S390_CLEAR_RESET:
r = 0;
kvm_arch_vcpu_ioctl_clear_reset(vcpu);
+ if (kvm_s390_pv_handle_cpu(vcpu)) {
+ r = uv_cmd_nodata(kvm_s390_pv_handle_cpu(vcpu),
+ UVC_CMD_CPU_RESET_CLEAR, &rc, &rrc);
+ VCPU_EVENT(vcpu, 3, "PROTVIRT RESET CLEAR VCPU: rc %x rrc %x",
+ rc, rrc);
+ }
break;
case KVM_S390_INITIAL_RESET:
r = 0;
kvm_arch_vcpu_ioctl_initial_reset(vcpu);
+ if (kvm_s390_pv_handle_cpu(vcpu)) {
+ r = uv_cmd_nodata(kvm_s390_pv_handle_cpu(vcpu),
+ UVC_CMD_CPU_RESET_INITIAL,
+ &rc, &rrc);
+ VCPU_EVENT(vcpu, 3, "PROTVIRT RESET INITIAL VCPU: rc %x rrc %x",
+ rc, rrc);
+ }
break;
case KVM_S390_NORMAL_RESET:
r = 0;
kvm_arch_vcpu_ioctl_normal_reset(vcpu);
+ if (kvm_s390_pv_handle_cpu(vcpu)) {
+ r = uv_cmd_nodata(kvm_s390_pv_handle_cpu(vcpu),
+ UVC_CMD_CPU_RESET, &rc, &rrc);
+ VCPU_EVENT(vcpu, 3, "PROTVIRT RESET NORMAL VCPU: rc %x rrc %x",
+ rc, rrc);
+ }
break;
case KVM_SET_ONE_REG:
case KVM_GET_ONE_REG: {
--
2.25.0
