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KVM: s390: protvirt: UV calls in support of diag308 0, 1

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diag 308 subcode 0 and 1 require several KVM and Ultravisor interactions.
Specific to these "soft" reboots are

* The "unshare all" UVC
* The "prepare for reset" UVC

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Janosch Frank 2019-05-09 13:07:21 +02:00 committed by Christian Borntraeger
parent ea5c68c390
commit e0d2773d48
3 changed files with 28 additions and 0 deletions
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4
arch/s390/include/asm/uv.h
View File

@ -36,6 +36,8 @@
#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
#define UVC_CMD_UNPACK_IMG 0x0301
#define UVC_CMD_VERIFY_IMG 0x0302
#define UVC_CMD_PREPARE_RESET 0x0320
#define UVC_CMD_SET_UNSHARE_ALL 0x0340
#define UVC_CMD_PIN_PAGE_SHARED 0x0341
#define UVC_CMD_UNPIN_PAGE_SHARED 0x0342
#define UVC_CMD_SET_SHARED_ACCESS 0x1000
@ -56,6 +58,8 @@ 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_PREPARE_RESET = 18,
BIT_UVC_CMD_UNSHARE_ALL = 20,
BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
};

22
arch/s390/kvm/kvm-s390.c
View File

@ -2328,6 +2328,28 @@ static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd)
cmd->rrc);
break;
}
case KVM_PV_PREP_RESET: {
r = -EINVAL;
if (!kvm_s390_pv_is_protected(kvm))
break;
r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
UVC_CMD_PREPARE_RESET, &cmd->rc, &cmd->rrc);
KVM_UV_EVENT(kvm, 3, "PROTVIRT PREP RESET: rc %x rrc %x",
cmd->rc, cmd->rrc);
break;
}
case KVM_PV_UNSHARE_ALL: {
r = -EINVAL;
if (!kvm_s390_pv_is_protected(kvm))
break;
r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
UVC_CMD_SET_UNSHARE_ALL, &cmd->rc, &cmd->rrc);
KVM_UV_EVENT(kvm, 3, "PROTVIRT UNSHARE: rc %x rrc %x",
cmd->rc, cmd->rrc);
break;
}
default:
r = -ENOTTY;
}

2
include/uapi/linux/kvm.h
View File

@ -1500,6 +1500,8 @@ enum pv_cmd_id {
KVM_PV_SET_SEC_PARMS,
KVM_PV_UNPACK,
KVM_PV_VERIFY,
KVM_PV_PREP_RESET,
KVM_PV_UNSHARE_ALL,
};
struct kvm_pv_cmd {