[Qemu-devel] [RFC PATCH v4 12/20] SEV: add GUEST_STATUS command

[Brijesh Singh <brijesh.singh@amd.com>]

The command is used to retrieve status information about an SEV-enabled guest.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 include/sysemu/sev.h |    9 +++++++++
 sev.c                |   28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 747fe87..88cbea5 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -82,6 +82,15 @@ struct SEVState {
 
 typedef struct SEVState SEVState;
 
+enum {
+    SEV_STATE_INVALID = 0,
+    SEV_STATE_LAUNCHING,
+    SEV_STATE_SECRET,
+    SEV_STATE_RUNNING,
+    SEV_STATE_RECEIVING,
+    SEV_STATE_SENDING,
+    SEV_STATE_MAX
+};
 
 bool sev_enabled(void);
 void *sev_guest_init(const char *keyid);
diff --git a/sev.c b/sev.c
index 4b3f39a..c13bbfd 100644
--- a/sev.c
+++ b/sev.c
@@ -197,6 +197,34 @@ err:
 }
 
 static int
+sev_get_current_state(SEVState *s)
+{
+    int error;
+    int ret = SEV_STATE_INVALID;
+    struct kvm_sev_guest_status *status;
+
+    if (!s) {
+        return ret;
+    }
+
+    status = g_malloc(sizeof(*status));
+    if (!status) {
+        return ret;
+    }
+
+    ret = sev_ioctl(KVM_SEV_GUEST_STATUS, status, &error);
+    if (ret) {
+        fprintf(stderr, "failed GUEST_STATUS %d (%#x)\n", ret, error);
+        goto err;
+    }
+
+    ret = status->state;
+err:
+    g_free(status);
+    return ret;
+}
+
+static int
 sev_mem_write(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
 {
     return 0;