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Iglesias " , Peter Maydell , Peter Crosthwaite , Eduardo Habkost , kvm@vger.kernel.org, Marcel Apfelbaum , Markus Armbruster , "Michael S. Tsirkin" , Richard Henderson , "Dr. David Alan Gilbert" , Alistair Francis , Christian Borntraeger , Brijesh Singh , Stefan Hajnoczi , Cornelia Huck , Paolo Bonzini , Thomas Lendacky , Borislav Petkov , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 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 --- accel/kvm/kvm-all.c | 2 ++ accel/kvm/sev.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/sysemu/sev.h | 1 + 3 files changed, 47 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 54a0fd6097fb..d35eebb97901 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 74eb67526bd0..83fc950bd3ac 100644 --- a/accel/kvm/sev.c +++ b/accel/kvm/sev.c @@ -368,6 +368,37 @@ 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; + 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; + } + + DPRINTF("SEV: LAUNCH_UPDATE_DATA %#lx+%#lx\n", (unsigned long)addr, len); + +err: + g_free(update); + return ret; +} + void * sev_guest_init(const char *id) { @@ -417,6 +448,19 @@ err: return NULL; } +int +sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len) +{ + SEVState *s = (SEVState *)handle; + + /* if SEV is in update state then encrypt the data else do nothing */ + if (s->cur_state == SEV_STATE_LUPDATE) { + return sev_launch_update_data(ptr, len); + } + + return 0; +} + static void sev_register_types(void) { diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h index 45b464cc96f5..b1ea3f805290 100644 --- a/include/sysemu/sev.h +++ b/include/sysemu/sev.h @@ -69,6 +69,7 @@ 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