diff mbox series

[Part2,RFC,v4,14/40] crypto:ccp: Provide APIs to issue SEV-SNP commands

Message ID 20210707183616.5620-15-brijesh.singh@amd.com
State New
Headers show
Series [Part2,RFC,v4,01/40] KVM: SVM: Add support to handle AP reset MSR protocol | expand

Commit Message

Brijesh Singh July 7, 2021, 6:35 p.m. UTC 
Provide the APIs for the hypervisor to manage an SEV-SNP guest. The
commands for SEV-SNP is defined in the SEV-SNP firmware specification.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 drivers/crypto/ccp/sev-dev.c | 24 ++++++++++++
 include/linux/psp-sev.h      | 74 ++++++++++++++++++++++++++++++++++++
 2 files changed, 98 insertions(+)

Comments

Dr. David Alan Gilbert July 8, 2021, 6:56 p.m. UTC | #1 
* Brijesh Singh (brijesh.singh@amd.com) wrote:
> Provide the APIs for the hypervisor to manage an SEV-SNP guest. The

> commands for SEV-SNP is defined in the SEV-SNP firmware specification.

> 

> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>

> ---

>  drivers/crypto/ccp/sev-dev.c | 24 ++++++++++++

>  include/linux/psp-sev.h      | 74 ++++++++++++++++++++++++++++++++++++

>  2 files changed, 98 insertions(+)

> 

> diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c

> index 84c91bab00bd..ad9a0c8111e0 100644

> --- a/drivers/crypto/ccp/sev-dev.c

> +++ b/drivers/crypto/ccp/sev-dev.c

> @@ -1017,6 +1017,30 @@ int sev_guest_df_flush(int *error)

>  }

>  EXPORT_SYMBOL_GPL(sev_guest_df_flush);

>  

> +int snp_guest_decommission(struct sev_data_snp_decommission *data, int *error)

> +{

> +	return sev_do_cmd(SEV_CMD_SNP_DECOMMISSION, data, error);

> +}

> +EXPORT_SYMBOL_GPL(snp_guest_decommission);

> +

> +int snp_guest_df_flush(int *error)

> +{

> +	return sev_do_cmd(SEV_CMD_SNP_DF_FLUSH, NULL, error);

> +}

> +EXPORT_SYMBOL_GPL(snp_guest_df_flush);

> +

> +int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)

> +{

> +	return sev_do_cmd(SEV_CMD_SNP_PAGE_RECLAIM, data, error);

> +}

> +EXPORT_SYMBOL_GPL(snp_guest_page_reclaim);

> +

> +int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)

> +{

> +	return sev_do_cmd(SEV_CMD_SNP_DBG_DECRYPT, data, error);

> +}

> +EXPORT_SYMBOL_GPL(snp_guest_dbg_decrypt);

> +

>  static void sev_exit(struct kref *ref)

>  {

>  	misc_deregister(&misc_dev->misc);

> diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h

> index 1b53e8782250..63ef766cbd7a 100644

> --- a/include/linux/psp-sev.h

> +++ b/include/linux/psp-sev.h

> @@ -860,6 +860,65 @@ int sev_guest_df_flush(int *error);

>   */

>  int sev_guest_decommission(struct sev_data_decommission *data, int *error);

>  

> +/**

> + * snp_guest_df_flush - perform SNP DF_FLUSH command

> + *

> + * @sev_ret: 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


Weird wording.

> + * -%ETIMEDOUT if the sev command timed out

> + * -%EIO       if the sev returned a non-zero return code

> + */

> +int snp_guest_df_flush(int *error);

> +

> +/**

> + * snp_guest_decommission - perform SNP_DECOMMISSION command

> + *

> + * @decommission: sev_data_decommission structure to be processed

> + * @sev_ret: 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 snp_guest_decommission(struct sev_data_snp_decommission *data, int *error);

> +

> +/**

> + * snp_guest_page_reclaim - perform SNP_PAGE_RECLAIM command

> + *

> + * @decommission: sev_snp_page_reclaim structure to be processed

> + * @sev_ret: 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 snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error);

> +

> +/**

> + * snp_guest_dbg_decrypt - perform SEV SNP_DBG_DECRYPT command

> + *

> + * @sev_ret: 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 snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error);

> +

> +

>  void *psp_copy_user_blob(u64 uaddr, u32 len);

>  

>  #else	/* !CONFIG_CRYPTO_DEV_SP_PSP */

> @@ -887,6 +946,21 @@ sev_issue_cmd_external_user(struct file *filep, unsigned int id, void *data, int

>  

>  static inline void *psp_copy_user_blob(u64 __user uaddr, u32 len) { return ERR_PTR(-EINVAL); }

>  

> +static inline int

> +snp_guest_decommission(struct sev_data_snp_decommission *data, int *error) { return -ENODEV; }

> +

> +static inline int snp_guest_df_flush(int *error) { return -ENODEV; }

> +

> +static inline int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)

> +{

> +	return -ENODEV;

> +}

> +

> +static inline int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)

> +{

> +	return -ENODEV;

> +}

> +

>  #endif	/* CONFIG_CRYPTO_DEV_SP_PSP */

>  

>  #endif	/* __PSP_SEV_H__ */

> -- 

> 2.17.1

> 

> 

-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
diff mbox series

Patch

diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 84c91bab00bd..ad9a0c8111e0 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1017,6 +1017,30 @@  int sev_guest_df_flush(int *error)
 }
 EXPORT_SYMBOL_GPL(sev_guest_df_flush);
 
+int snp_guest_decommission(struct sev_data_snp_decommission *data, int *error)
+{
+	return sev_do_cmd(SEV_CMD_SNP_DECOMMISSION, data, error);
+}
+EXPORT_SYMBOL_GPL(snp_guest_decommission);
+
+int snp_guest_df_flush(int *error)
+{
+	return sev_do_cmd(SEV_CMD_SNP_DF_FLUSH, NULL, error);
+}
+EXPORT_SYMBOL_GPL(snp_guest_df_flush);
+
+int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)
+{
+	return sev_do_cmd(SEV_CMD_SNP_PAGE_RECLAIM, data, error);
+}
+EXPORT_SYMBOL_GPL(snp_guest_page_reclaim);
+
+int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)
+{
+	return sev_do_cmd(SEV_CMD_SNP_DBG_DECRYPT, data, error);
+}
+EXPORT_SYMBOL_GPL(snp_guest_dbg_decrypt);
+
 static void sev_exit(struct kref *ref)
 {
 	misc_deregister(&misc_dev->misc);
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
index 1b53e8782250..63ef766cbd7a 100644
--- a/include/linux/psp-sev.h
+++ b/include/linux/psp-sev.h
@@ -860,6 +860,65 @@  int sev_guest_df_flush(int *error);
  */
 int sev_guest_decommission(struct sev_data_decommission *data, int *error);
 
+/**
+ * snp_guest_df_flush - perform SNP DF_FLUSH command
+ *
+ * @sev_ret: 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 snp_guest_df_flush(int *error);
+
+/**
+ * snp_guest_decommission - perform SNP_DECOMMISSION command
+ *
+ * @decommission: sev_data_decommission structure to be processed
+ * @sev_ret: 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 snp_guest_decommission(struct sev_data_snp_decommission *data, int *error);
+
+/**
+ * snp_guest_page_reclaim - perform SNP_PAGE_RECLAIM command
+ *
+ * @decommission: sev_snp_page_reclaim structure to be processed
+ * @sev_ret: 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 snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error);
+
+/**
+ * snp_guest_dbg_decrypt - perform SEV SNP_DBG_DECRYPT command
+ *
+ * @sev_ret: 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 snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error);
+
+
 void *psp_copy_user_blob(u64 uaddr, u32 len);
 
 #else	/* !CONFIG_CRYPTO_DEV_SP_PSP */
@@ -887,6 +946,21 @@  sev_issue_cmd_external_user(struct file *filep, unsigned int id, void *data, int
 
 static inline void *psp_copy_user_blob(u64 __user uaddr, u32 len) { return ERR_PTR(-EINVAL); }
 
+static inline int
+snp_guest_decommission(struct sev_data_snp_decommission *data, int *error) { return -ENODEV; }
+
+static inline int snp_guest_df_flush(int *error) { return -ENODEV; }
+
+static inline int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)
+{
+	return -ENODEV;
+}
+
+static inline int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)
+{
+	return -ENODEV;
+}
+
 #endif	/* CONFIG_CRYPTO_DEV_SP_PSP */
 
 #endif	/* __PSP_SEV_H__ */