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Message-Id: <20210430123822.13825-16-brijesh.singh@amd.com>
Date: Fri, 30 Apr 2021 07:38:00 -0500
From: Brijesh Singh <brijesh.singh@....com>
To: x86@...nel.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: tglx@...utronix.de, bp@...en8.de, jroedel@...e.de,
thomas.lendacky@....com, pbonzini@...hat.com, mingo@...hat.com,
dave.hansen@...el.com, rientjes@...gle.com, seanjc@...gle.com,
peterz@...radead.org, hpa@...or.com, tony.luck@...el.com,
Brijesh Singh <brijesh.singh@....com>
Subject: [PATCH Part2 RFC v2 15/37] crypto:ccp: Provide APIs to issue SEV-SNP commands
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@....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 23ad6e7696df..75ec67ba2b55 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1010,6 +1010,30 @@ 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__ */
--
2.17.1
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