[5/9] target/i386: sev: Partial cleanup to sev_state global

diff --git a/target/i386/sev.c b/target/i386/sev.c
index b4ab9720d6..9e8ab7b056 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -80,7 +80,7 @@  struct SevGuestState {
 #define DEFAULT_GUEST_POLICY    0x1 /* disable debug */
 #define DEFAULT_SEV_DEVICE      "/dev/sev"
 
-static SEVState *sev_state;
+static SevGuestState *sev_guest;
 static Error *sev_mig_blocker;
 
 static const char *const sev_fw_errlist[] = {
@@ -159,21 +159,21 @@  fw_error_to_str(int code)
 }
 
 static bool
-sev_check_state(SevState state)
+sev_check_state(const SevGuestState *sev, SevState state)
 {
-    assert(sev_state);
-    return sev_state->state == state ? true : false;
+    assert(sev);
+    return sev->state.state == state ? true : false;
 }
 
 static void
-sev_set_guest_state(SevState new_state)
+sev_set_guest_state(SevGuestState *sev, SevState new_state)
 {
     assert(new_state < SEV_STATE__MAX);
-    assert(sev_state);
+    assert(sev);
 
-    trace_kvm_sev_change_state(SevState_str(sev_state->state),
+    trace_kvm_sev_change_state(SevState_str(sev->state.state),
                                SevState_str(new_state));
-    sev_state->state = new_state;
+    sev->state.state = new_state;
 }
 
 static void
@@ -366,25 +366,25 @@  lookup_sev_guest_info(const char *id)
 bool
 sev_enabled(void)
 {
-    return sev_state ? true : false;
+    return !!sev_guest;
 }
 
 uint64_t
 sev_get_me_mask(void)
 {
-    return sev_state ? sev_state->me_mask : ~0;
+    return sev_guest ? sev_guest->state.me_mask : ~0;
 }
 
 uint32_t
 sev_get_cbit_position(void)
 {
-    return sev_state ? sev_state->cbitpos : 0;
+    return sev_guest ? sev_guest->state.cbitpos : 0;
 }
 
 uint32_t
 sev_get_reduced_phys_bits(void)
 {
-    return sev_state ? sev_state->reduced_phys_bits : 0;
+    return sev_guest ? sev_guest->state.reduced_phys_bits : 0;
 }
 
 SevInfo *
@@ -393,15 +393,15 @@  sev_get_info(void)
     SevInfo *info;
 
     info = g_new0(SevInfo, 1);
-    info->enabled = sev_state ? true : false;
+    info->enabled = sev_enabled();
 
     if (info->enabled) {
-        info->api_major = sev_state->api_major;
-        info->api_minor = sev_state->api_minor;
-        info->build_id = sev_state->build_id;
-        info->policy = sev_state->policy;
-        info->state = sev_state->state;
-        info->handle = sev_state->handle;
+        info->api_major = sev_guest->state.api_major;
+        info->api_minor = sev_guest->state.api_minor;
+        info->build_id = sev_guest->state.build_id;
+        info->policy = sev_guest->state.policy;
+        info->state = sev_guest->state.state;
+        info->handle = sev_guest->state.handle;
     }
 
     return info;
@@ -550,7 +550,7 @@  sev_launch_start(SevGuestState *sev)
 
     object_property_set_int(OBJECT(sev), start->handle, "handle",
                             &error_abort);
-    sev_set_guest_state(SEV_STATE_LAUNCH_UPDATE);
+    sev_set_guest_state(sev, SEV_STATE_LAUNCH_UPDATE);
     s->handle = start->handle;
     s->policy = start->policy;
     ret = 0;
@@ -563,7 +563,7 @@  out:
 }
 
 static int
-sev_launch_update_data(uint8_t *addr, uint64_t len)
+sev_launch_update_data(SevGuestState *sev, uint8_t *addr, uint64_t len)
 {
     int ret, fw_error;
     struct kvm_sev_launch_update_data update;
@@ -575,7 +575,7 @@  sev_launch_update_data(uint8_t *addr, uint64_t len)
     update.uaddr = (__u64)(unsigned long)addr;
     update.len = len;
     trace_kvm_sev_launch_update_data(addr, len);
-    ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_UPDATE_DATA,
+    ret = sev_ioctl(sev->state.sev_fd, KVM_SEV_LAUNCH_UPDATE_DATA,
                     &update, &fw_error);
     if (ret) {
         error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
@@ -588,19 +588,20 @@  sev_launch_update_data(uint8_t *addr, uint64_t len)
 static void
 sev_launch_get_measure(Notifier *notifier, void *unused)
 {
+    SevGuestState *sev = sev_guest;
     int ret, error;
     guchar *data;
-    SEVState *s = sev_state;
+    SEVState *s = &sev->state;
     struct kvm_sev_launch_measure *measurement;
 
-    if (!sev_check_state(SEV_STATE_LAUNCH_UPDATE)) {
+    if (!sev_check_state(sev, SEV_STATE_LAUNCH_UPDATE)) {
         return;
     }
 
     measurement = g_new0(struct kvm_sev_launch_measure, 1);
 
     /* query the measurement blob length */
-    ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_MEASURE,
+    ret = sev_ioctl(sev->state.sev_fd, KVM_SEV_LAUNCH_MEASURE,
                     measurement, &error);
     if (!measurement->len) {
         error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
@@ -612,7 +613,7 @@  sev_launch_get_measure(Notifier *notifier, void *unused)
     measurement->uaddr = (unsigned long)data;
 
     /* get the measurement blob */
-    ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_MEASURE,
+    ret = sev_ioctl(sev->state.sev_fd, KVM_SEV_LAUNCH_MEASURE,
                     measurement, &error);
     if (ret) {
         error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
@@ -620,7 +621,7 @@  sev_launch_get_measure(Notifier *notifier, void *unused)
         goto free_data;
     }
 
-    sev_set_guest_state(SEV_STATE_LAUNCH_SECRET);
+    sev_set_guest_state(sev, SEV_STATE_LAUNCH_SECRET);
 
     /* encode the measurement value and emit the event */
     s->measurement = g_base64_encode(data, measurement->len);
@@ -635,9 +636,9 @@  free_measurement:
 char *
 sev_get_launch_measurement(void)
 {
-    if (sev_state &&
-        sev_state->state >= SEV_STATE_LAUNCH_SECRET) {
-        return g_strdup(sev_state->measurement);
+    if (sev_guest &&
+        sev_guest->state.state >= SEV_STATE_LAUNCH_SECRET) {
+        return g_strdup(sev_guest->state.measurement);
     }
 
     return NULL;
@@ -648,20 +649,21 @@  static Notifier sev_machine_done_notify = {
 };
 
 static void
-sev_launch_finish(SEVState *s)
+sev_launch_finish(SevGuestState *sev)
 {
+    SEVState *s = &sev->state;
     int ret, error;
     Error *local_err = NULL;
 
     trace_kvm_sev_launch_finish();
-    ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_FINISH, 0, &error);
+    ret = sev_ioctl(s->sev_fd, KVM_SEV_LAUNCH_FINISH, 0, &error);
     if (ret) {
         error_report("%s: LAUNCH_FINISH ret=%d fw_error=%d '%s'",
                      __func__, ret, error, fw_error_to_str(error));
         exit(1);
     }
 
-    sev_set_guest_state(SEV_STATE_RUNNING);
+    sev_set_guest_state(sev, SEV_STATE_RUNNING);
 
     /* add migration blocker */
     error_setg(&sev_mig_blocker,
@@ -677,11 +679,11 @@  sev_launch_finish(SEVState *s)
 static void
 sev_vm_state_change(void *opaque, int running, RunState state)
 {
-    SEVState *s = opaque;
+    SevGuestState *sev = opaque;
 
     if (running) {
-        if (!sev_check_state(SEV_STATE_RUNNING)) {
-            sev_launch_finish(s);
+        if (!sev_check_state(sev, SEV_STATE_RUNNING)) {
+            sev_launch_finish(sev);
         }
     }
 }
@@ -704,7 +706,8 @@  sev_guest_init(const char *id)
         goto err;
     }
 
-    sev_state = s = &sev->state;
+    sev_guest = sev;
+    s = &sev->state;
     s->state = SEV_STATE_UNINIT;
 
     host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
@@ -766,23 +769,24 @@  sev_guest_init(const char *id)
 
     ram_block_notifier_add(&sev_ram_notifier);
     qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
-    qemu_add_vm_change_state_handler(sev_vm_state_change, s);
+    qemu_add_vm_change_state_handler(sev_vm_state_change, sev);
 
-    return s;
+    return sev;
 err:
-    g_free(sev_state);
-    sev_state = NULL;
+    sev_guest = NULL;
     return NULL;
 }
 
 int
 sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
 {
-    assert(handle);
+    SevGuestState *sev = handle;
+
+    assert(sev);
 
     /* if SEV is in update state then encrypt the data else do nothing */
-    if (sev_check_state(SEV_STATE_LAUNCH_UPDATE)) {
-        return sev_launch_update_data(ptr, len);
+    if (sev_check_state(sev, SEV_STATE_LAUNCH_UPDATE)) {
+        return sev_launch_update_data(sev, ptr, len);
     }
 
     return 0;