KVM: s390: protvirt: UV calls in support of diag308 0, 1
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>
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@ -36,6 +36,8 @@
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#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
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#define UVC_CMD_UNPACK_IMG 0x0301
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#define UVC_CMD_VERIFY_IMG 0x0302
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#define UVC_CMD_PREPARE_RESET 0x0320
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#define UVC_CMD_SET_UNSHARE_ALL 0x0340
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#define UVC_CMD_PIN_PAGE_SHARED 0x0341
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#define UVC_CMD_UNPIN_PAGE_SHARED 0x0342
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#define UVC_CMD_SET_SHARED_ACCESS 0x1000
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@ -56,6 +58,8 @@ enum uv_cmds_inst {
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BIT_UVC_CMD_SET_SEC_PARMS = 11,
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BIT_UVC_CMD_UNPACK_IMG = 13,
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BIT_UVC_CMD_VERIFY_IMG = 14,
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BIT_UVC_CMD_PREPARE_RESET = 18,
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BIT_UVC_CMD_UNSHARE_ALL = 20,
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BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
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BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
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};
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@ -2328,6 +2328,28 @@ static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd)
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cmd->rrc);
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break;
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}
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case KVM_PV_PREP_RESET: {
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r = -EINVAL;
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if (!kvm_s390_pv_is_protected(kvm))
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break;
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r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
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UVC_CMD_PREPARE_RESET, &cmd->rc, &cmd->rrc);
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KVM_UV_EVENT(kvm, 3, "PROTVIRT PREP RESET: rc %x rrc %x",
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cmd->rc, cmd->rrc);
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break;
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}
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case KVM_PV_UNSHARE_ALL: {
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r = -EINVAL;
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if (!kvm_s390_pv_is_protected(kvm))
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break;
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r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
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UVC_CMD_SET_UNSHARE_ALL, &cmd->rc, &cmd->rrc);
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KVM_UV_EVENT(kvm, 3, "PROTVIRT UNSHARE: rc %x rrc %x",
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cmd->rc, cmd->rrc);
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break;
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}
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default:
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r = -ENOTTY;
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}
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@ -1500,6 +1500,8 @@ enum pv_cmd_id {
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KVM_PV_SET_SEC_PARMS,
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KVM_PV_UNPACK,
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KVM_PV_VERIFY,
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KVM_PV_PREP_RESET,
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KVM_PV_UNSHARE_ALL,
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};
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struct kvm_pv_cmd {
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