From: Brijesh Singh <brijesh.singh@xxxxxxx>
Make sev_do_cmd() a generic API interface for the hypervisor
to issue commands to manage an SEV and SNP guest. The commands
for SEV and SNP are defined in the SEV and SEV-SNP firmware
specifications.
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>
---
drivers/crypto/ccp/sev-dev.c | 3 ++-
include/linux/psp-sev.h | 17 +++++++++++++++++
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index fae1fd45eccd..613b25f81498 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -418,7 +418,7 @@ static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)
return ret;
}
-static int sev_do_cmd(int cmd, void *data, int *psp_ret)
+int sev_do_cmd(int cmd, void *data, int *psp_ret)
{
int rc;
@@ -428,6 +428,7 @@ static int sev_do_cmd(int cmd, void *data, int *psp_ret)
return rc;
}
+EXPORT_SYMBOL_GPL(sev_do_cmd);
static int __sev_init_locked(int *error)
{
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
index a7f92e74564d..61bb5849ebf2 100644
--- a/include/linux/psp-sev.h
+++ b/include/linux/psp-sev.h
@@ -883,6 +883,20 @@ int sev_guest_df_flush(int *error);
*/
int sev_guest_decommission(struct sev_data_decommission *data, int *error);
+/**
+ * sev_do_cmd - perform SEV command
+ *
+ * @error: SEV command return code
+ *
+ * Returns:
+ * 0 if the SEV successfully processed the command
+ * -%ENODEV if the SEV device is not available
+ * -%ENOTSUPP if the SEV does not support SEV
+ * -%ETIMEDOUT if the SEV command timed out
+ * -%EIO if the SEV returned a non-zero return code
+ */
+int sev_do_cmd(int cmd, void *data, int *psp_ret);
+
void *psp_copy_user_blob(u64 uaddr, u32 len);
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
@@ -898,6 +912,9 @@ sev_guest_deactivate(struct sev_data_deactivate *data, int *error) { return -ENO
static inline int
sev_guest_decommission(struct sev_data_decommission *data, int *error) { return -ENODEV; }
+static inline int
+sev_do_cmd(int cmd, void *data, int *psp_ret) { return -ENODEV; }
+
static inline int
sev_guest_activate(struct sev_data_activate *data, int *error) { return -ENODEV; }
--
2.25.1
