At the moment AMD SEV sets a special function pointer, plus an opaque
handle in KVMState to let things know how to encrypt guest memory.
Now that we have a QOM interface for handling things related to guest
memory protection, use a QOM method on that interface, rather than a bare
function pointer for this.
Signed-off-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
---
accel/kvm/kvm-all.c | 23 +++----
accel/kvm/sev-stub.c | 5 --
include/exec/guest-memory-protection.h | 2 +
include/sysemu/sev.h | 6 +-
target/i386/sev.c | 84 ++++++++++++++------------
5 files changed, 63 insertions(+), 57 deletions(-)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index d06cc04079..40997de38c 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -45,6 +45,7 @@
#include "qapi/qapi-types-common.h"
#include "qapi/qapi-visit-common.h"
#include "sysemu/reset.h"
+#include "exec/guest-memory-protection.h"
#include "hw/boards.h"
@@ -119,8 +120,7 @@ struct KVMState
QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
/* memory encryption */
- void *memcrypt_handle;
- int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
+ GuestMemoryProtection *guest_memory_protection;
/* For "info mtree -f" to tell if an MR is registered in KVM */
int nr_as;
@@ -172,7 +172,7 @@ int kvm_get_max_memslots(void)
bool kvm_memcrypt_enabled(void)
{
- if (kvm_state && kvm_state->memcrypt_handle) {
+ if (kvm_state && kvm_state->guest_memory_protection) {
return true;
}
@@ -181,10 +181,13 @@ bool kvm_memcrypt_enabled(void)
int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
{
- if (kvm_state->memcrypt_handle &&
- kvm_state->memcrypt_encrypt_data) {
- return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
- ptr, len);
+ GuestMemoryProtection *gmpo = kvm_state->guest_memory_protection;
+
+ if (gmpo) {
+ GuestMemoryProtectionClass *gmpc =
+ GUEST_MEMORY_PROTECTION_GET_CLASS(gmpo);
+
+ return gmpc->encrypt_data(gmpo, ptr, len);
}
return 1;
@@ -2101,13 +2104,11 @@ static int kvm_init(MachineState *ms)
* encryption context.
*/
if (ms->memory_encryption) {
- kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
- if (!kvm_state->memcrypt_handle) {
+ kvm_state->guest_memory_protection = sev_guest_init(ms->memory_encryption);
+ if (!kvm_state->guest_memory_protection) {
ret = -1;
goto err;
}
-
- kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
}
ret = kvm_arch_init(ms, s);
diff --git a/accel/kvm/sev-stub.c b/accel/kvm/sev-stub.c
index 4f97452585..4a5cc5569e 100644
--- a/accel/kvm/sev-stub.c
+++ b/accel/kvm/sev-stub.c
@@ -15,11 +15,6 @@
#include "qemu-common.h"
#include "sysemu/sev.h"
-int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
-{
- abort();
-}
-
void *sev_guest_init(const char *id)
{
return NULL;
diff --git a/include/exec/guest-memory-protection.h b/include/exec/guest-memory-protection.h
index 38e9b01667..eb712a5804 100644
--- a/include/exec/guest-memory-protection.h
+++ b/include/exec/guest-memory-protection.h
@@ -30,6 +30,8 @@ typedef struct GuestMemoryProtection GuestMemoryProtection;
typedef struct GuestMemoryProtectionClass {
InterfaceClass parent;
+
+ int (*encrypt_data)(GuestMemoryProtection *, uint8_t *, uint64_t);
} GuestMemoryProtectionClass;
#endif /* QEMU_GUEST_MEMORY_PROTECTION_H */
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 98c1ec8d38..7735a7942e 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -16,6 +16,8 @@
#include "sysemu/kvm.h"
-void *sev_guest_init(const char *id);
-int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
+typedef struct GuestMemoryProtection GuestMemoryProtection;
+
+GuestMemoryProtection *sev_guest_init(const char *id);
+
#endif
diff --git a/target/i386/sev.c b/target/i386/sev.c
index d273174ad3..986c2fee51 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -28,6 +28,7 @@
#include "sysemu/runstate.h"
#include "trace.h"
#include "migration/blocker.h"
+#include "exec/guest-memory-protection.h"
#define TYPE_SEV_GUEST "sev-guest"
#define SEV_GUEST(obj) \
@@ -281,26 +282,6 @@ sev_guest_set_sev_device(Object *obj, const char *value, Error **errp)
sev->sev_device = g_strdup(value);
}
-static void
-sev_guest_class_init(ObjectClass *oc, void *data)
-{
- object_class_property_add_str(oc, "sev-device",
- sev_guest_get_sev_device,
- sev_guest_set_sev_device);
- object_class_property_set_description(oc, "sev-device",
- "SEV device to use");
- object_class_property_add_str(oc, "dh-cert-file",
- sev_guest_get_dh_cert_file,
- sev_guest_set_dh_cert_file);
- object_class_property_set_description(oc, "dh-cert-file",
- "guest owners DH certificate (encoded with base64)");
- object_class_property_add_str(oc, "session-file",
- sev_guest_get_session_file,
- sev_guest_set_session_file);
- object_class_property_set_description(oc, "session-file",
- "guest owners session parameters (encoded with base64)");
-}
-
static void
sev_guest_instance_init(Object *obj)
{
@@ -319,20 +300,6 @@ sev_guest_instance_init(Object *obj)
OBJ_PROP_FLAG_READWRITE);
}
-/* sev guest info */
-static const TypeInfo sev_guest_info = {
- .parent = TYPE_OBJECT,
- .name = TYPE_SEV_GUEST,
- .instance_size = sizeof(SevGuestState),
- .instance_finalize = sev_guest_finalize,
- .class_init = sev_guest_class_init,
- .instance_init = sev_guest_instance_init,
- .interfaces = (InterfaceInfo[]) {
- { TYPE_USER_CREATABLE },
- { }
- }
-};
-
static SevGuestState *
lookup_sev_guest_info(const char *id)
{
@@ -670,7 +637,7 @@ sev_vm_state_change(void *opaque, int running, RunState state)
}
}
-void *
+GuestMemoryProtection *
sev_guest_init(const char *id)
{
SevGuestState *sev;
@@ -748,16 +715,16 @@ sev_guest_init(const char *id)
qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
qemu_add_vm_change_state_handler(sev_vm_state_change, sev);
- return sev;
+ return GUEST_MEMORY_PROTECTION(sev);
err:
sev_guest = NULL;
return NULL;
}
-int
-sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+static int
+sev_encrypt_data(GuestMemoryProtection *opaque, uint8_t *ptr, uint64_t len)
{
- SevGuestState *sev = handle;
+ SevGuestState *sev = SEV_GUEST(opaque);
assert(sev);
@@ -769,6 +736,45 @@ sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
return 0;
}
+static void
+sev_guest_class_init(ObjectClass *oc, void *data)
+{
+ GuestMemoryProtectionClass *gmpc = GUEST_MEMORY_PROTECTION_CLASS(oc);
+
+ object_class_property_add_str(oc, "sev-device",
+ sev_guest_get_sev_device,
+ sev_guest_set_sev_device);
+ object_class_property_set_description(oc, "sev-device",
+ "SEV device to use");
+ object_class_property_add_str(oc, "dh-cert-file",
+ sev_guest_get_dh_cert_file,
+ sev_guest_set_dh_cert_file);
+ object_class_property_set_description(oc, "dh-cert-file",
+ "guest owners DH certificate (encoded with base64)");
+ object_class_property_add_str(oc, "session-file",
+ sev_guest_get_session_file,
+ sev_guest_set_session_file);
+ object_class_property_set_description(oc, "session-file",
+ "guest owners session parameters (encoded with base64)");
+
+ gmpc->encrypt_data = sev_encrypt_data;
+}
+
+/* sev guest info */
+static const TypeInfo sev_guest_info = {
+ .parent = TYPE_OBJECT,
+ .name = TYPE_SEV_GUEST,
+ .instance_size = sizeof(SevGuestState),
+ .instance_finalize = sev_guest_finalize,
+ .class_init = sev_guest_class_init,
+ .instance_init = sev_guest_instance_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_GUEST_MEMORY_PROTECTION },
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
static void
sev_register_types(void)
{
--
2.26.2
