[PATCH v6 08/11] kvm: s390: Add KVM_CAP_S390_PROTECTED_DUMP

[Janosch Frank <frankja@linux.ibm.com>]

The capability indicates dump support for protected VMs.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 arch/s390/kvm/kvm-s390.c | 20 ++++++++++++++++++++
 include/uapi/linux/kvm.h |  1 +
 2 files changed, 21 insertions(+)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 1938756d4a32..99ce1aced86b 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -606,6 +606,26 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_S390_PROTECTED:
 		r = is_prot_virt_host();
 		break;
+	case KVM_CAP_S390_PROTECTED_DUMP: {
+		u64 pv_cmds_dump[] = {
+			BIT_UVC_CMD_DUMP_INIT,
+			BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE,
+			BIT_UVC_CMD_DUMP_CPU,
+			BIT_UVC_CMD_DUMP_COMPLETE,
+		};
+		int i;
+
+		r = is_prot_virt_host();
+
+		for (i = 0; i < ARRAY_SIZE(pv_cmds_dump); i++) {
+			if (!test_bit_inv(pv_cmds_dump[i],
+					  (unsigned long *)&uv_info.inst_calls_list)) {
+				r = 0;
+				break;
+			}
+		}
+		break;
+	}
 	default:
 		r = 0;
 	}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 204b06e3a50b..108bc7b7a71b 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1144,6 +1144,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_S390_MEM_OP_EXTENSION 211
 #define KVM_CAP_PMU_CAPABILITY 212
 #define KVM_CAP_DISABLE_QUIRKS2 213
+#define KVM_CAP_S390_PROTECTED_DUMP 214
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.34.1