The KVM_SEV_LAUNCH_START command creates a new VM encryption key (VEK).
The encryption key created with the command will be used for encrypting
the bootstrap images (such as guest bios).
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Eduardo Habkost <ehabkost@xxxxxxxxxx>
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
---
target/i386/sev.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++-
target/i386/trace-events | 2 ++
2 files changed, 92 insertions(+), 1 deletion(-)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index de5c8d4675a6..6f767084fd57 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -29,6 +29,8 @@ static int sev_fd;
static uint32_t x86_cbitpos;
static uint32_t x86_reduced_phys_bits;
+static SevState current_sev_guest_state = SEV_STATE_UNINIT;
+
static const char *const sev_fw_errlist[] = {
"",
"Platform state is invalid",
@@ -88,6 +90,16 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static void
+sev_set_guest_state(SevState new_state)
+{
+ assert(new_state < SEV_STATE__MAX);
+
+ trace_kvm_sev_change_state(SevState_str(current_sev_guest_state),
+ SevState_str(new_state));
+ current_sev_guest_state = new_state;
+}
+
static void
sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
{
@@ -365,7 +377,7 @@ sev_get_reduced_phys_bits(void)
SevState
sev_get_current_state(void)
{
- return SEV_STATE_UNINIT;
+ return current_sev_guest_state;
}
bool
@@ -384,6 +396,76 @@ sev_get_policy(uint32_t *policy)
{
}
+static int
+sev_read_file_base64(const char *filename, guchar **data, gsize *len)
+{
+ gsize sz;
+ gchar *base64;
+ GError *error = NULL;
+
+ if (!g_file_get_contents(filename, &base64, &sz, &error)) {
+ error_report("failed to read '%s' (%s)", filename, error->message);
+ return -1;
+ }
+
+ *data = g_base64_decode(base64, len);
+ return 0;
+}
+
+static int
+sev_launch_start(SEVState *s)
+{
+ gsize sz;
+ int ret = 1;
+ int fw_error;
+ QSevGuestInfo *sev = s->sev_info;
+ struct kvm_sev_launch_start *start;
+ guchar *session = NULL, *dh_cert = NULL;
+
+ start = g_malloc0(sizeof(*start));
+ if (!start) {
+ return 1;
+ }
+
+ start->handle = object_property_get_int(OBJECT(sev), "handle",
+ &error_abort);
+ start->policy = object_property_get_int(OBJECT(sev), "policy",
+ &error_abort);
+ if (sev->session_file) {
+ if (sev_read_file_base64(sev->session_file, &session, &sz) < 0) {
+ return 1;
+ }
+ start->session_uaddr = (unsigned long)session;
+ start->session_len = sz;
+ }
+
+ if (sev->dh_cert_file) {
+ if (sev_read_file_base64(sev->dh_cert_file, &dh_cert, &sz) < 0) {
+ return 1;
+ }
+ start->dh_uaddr = (unsigned long)dh_cert;
+ start->dh_len = sz;
+ }
+
+ trace_kvm_sev_launch_start(start->policy, session, dh_cert);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_START, start, &fw_error);
+ if (ret < 0) {
+ error_report("%s: LAUNCH_START ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ return 1;
+ }
+
+ object_property_set_int(OBJECT(sev), start->handle, "handle",
+ &error_abort);
+ sev_set_guest_state(SEV_STATE_LUPDATE);
+
+ g_free(start);
+ g_free(session);
+ g_free(dh_cert);
+
+ return 0;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -439,6 +521,13 @@ sev_guest_init(const char *id)
goto err;
}
+ ret = sev_launch_start(s);
+ if (ret) {
+ error_report("%s: failed to create encryption context", __func__);
+ goto err;
+ }
+
+
me_mask = (1UL << cbitpos);
x86_reduced_phys_bits = reduced_phys_bits;
x86_cbitpos = cbitpos;
diff --git a/target/i386/trace-events b/target/i386/trace-events
index ffa3d2250425..9402251e9991 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -10,3 +10,5 @@ kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
kvm_sev_init(void) ""
kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
+kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
+kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
--
2.14.3
