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[Qemu-devel] [PATCH v7 16/26] sev: add command to encrypt guest memory r
From: |
Brijesh Singh |
Subject: |
[Qemu-devel] [PATCH v7 16/26] sev: add command to encrypt guest memory region |
Date: |
Wed, 7 Feb 2018 10:06:28 -0600 |
The KVM_SEV_LAUNCH_UPDATE_DATA command is used to encrypt a guest memory
region using the VM Encryption Key created using LAUNCH_START.
Signed-off-by: Brijesh Singh <address@hidden>
---
accel/kvm/kvm-all.c | 2 ++
accel/kvm/sev.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
accel/kvm/trace-events | 1 +
include/sysemu/sev.h | 1 +
4 files changed, 53 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index f1fb826f0648..37f7c442dc3f 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1675,6 +1675,8 @@ static int kvm_init(MachineState *ms)
if (!kvm_state->memcrypt_handle) {
goto err;
}
+
+ kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
}
ret = kvm_arch_init(ms, s);
diff --git a/accel/kvm/sev.c b/accel/kvm/sev.c
index 2ecc6a1d1ad3..4414bda25509 100644
--- a/accel/kvm/sev.c
+++ b/accel/kvm/sev.c
@@ -97,6 +97,12 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static bool
+sev_check_state(SevGuestState state)
+{
+ return current_sev_guest_state == state ? true : false;
+}
+
static void
sev_set_guest_state(SevGuestState new_state)
{
@@ -447,6 +453,36 @@ sev_launch_start(SEVState *s)
return 0;
}
+static int
+sev_launch_update_data(uint8_t *addr, uint64_t len)
+{
+ int ret, fw_error;
+ struct kvm_sev_launch_update_data *update;
+
+ if (addr == NULL || len <= 0) {
+ return 1;
+ }
+
+ update = g_malloc0(sizeof(*update));
+ if (!update) {
+ return 1;
+ }
+
+ update->uaddr = (__u64)addr;
+ update->len = len;
+ trace_kvm_sev_launch_update_data(addr, len);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_UPDATE_DATA, update, &fw_error);
+ if (ret) {
+ error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ goto err;
+ }
+
+err:
+ g_free(update);
+ return ret;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -506,6 +542,19 @@ err:
return NULL;
}
+int
+sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ assert(handle);
+
+ /* if SEV is in update state then encrypt the data else do nothing */
+ if (sev_check_state(SEV_STATE_LUPDATE)) {
+ return sev_launch_update_data(ptr, len);
+ }
+
+ return 0;
+}
+
static void
sev_register_types(void)
{
diff --git a/accel/kvm/trace-events b/accel/kvm/trace-events
index 5d993ca08e5f..bd92f868b73a 100644
--- a/accel/kvm/trace-events
+++ b/accel/kvm/trace-events
@@ -19,3 +19,4 @@ 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"
+kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 08014a9c94ff..f7af1a00c510 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -75,6 +75,7 @@ struct SEVState {
typedef struct SEVState SEVState;
void *sev_guest_init(const char *id);
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
#endif
--
2.14.3
- [Qemu-devel] [PATCH v7 11/26] sev: register the guest memory range which may contain encrypted data, (continued)
- [Qemu-devel] [PATCH v7 11/26] sev: register the guest memory range which may contain encrypted data, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 09/26] accel: add Secure Encrypted Virtulization (SEV) object, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 10/26] sev: add command to initialize the memory encryption context, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 13/26] qmp: add query-sev command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 14/26] hmp: add 'info sev' command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 17/26] target/i386: encrypt bios rom, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 19/26] sev: Finalize the SEV guest launch flow, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 22/26] target/i386: clear C-bit when walking SEV guest page table, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 16/26] sev: add command to encrypt guest memory region,
Brijesh Singh <=
- [Qemu-devel] [PATCH v7 15/26] sev: add command to create launch memory encryption context, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 18/26] sev: add support to LAUNCH_MEASURE command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 20/26] hw: i386: set ram_debug_ops when memory encryption is enabled, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 12/26] kvm: introduce memory encryption APIs, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 21/26] sev: add debug encrypt and decrypt commands, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 23/26] include: add psp-sev.h header file, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 25/26] sev: add support to KVM_SEV_GUEST_STATUS, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 26/26] qmp: add query-sev-launch-measure command, Brijesh Singh, 2018/02/07