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Message-ID: <a63de5e687c530849312099ee02007089b67e92f.1655761627.git.ashish.kalra@amd.com>
Date: Mon, 20 Jun 2022 23:04:45 +0000
From: Ashish Kalra <Ashish.Kalra@....com>
To: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
<kvm@...r.kernel.org>, <linux-coco@...ts.linux.dev>,
<linux-mm@...ck.org>, <linux-crypto@...r.kernel.org>
CC: <tglx@...utronix.de>, <mingo@...hat.com>, <jroedel@...e.de>,
<thomas.lendacky@....com>, <hpa@...or.com>, <ardb@...nel.org>,
<pbonzini@...hat.com>, <seanjc@...gle.com>, <vkuznets@...hat.com>,
<jmattson@...gle.com>, <luto@...nel.org>,
<dave.hansen@...ux.intel.com>, <slp@...hat.com>,
<pgonda@...gle.com>, <peterz@...radead.org>,
<srinivas.pandruvada@...ux.intel.com>, <rientjes@...gle.com>,
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<michael.roth@....com>, <vbabka@...e.cz>, <kirill@...temov.name>,
<ak@...ux.intel.com>, <tony.luck@...el.com>, <marcorr@...gle.com>,
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
<alpergun@...gle.com>, <dgilbert@...hat.com>, <jarkko@...nel.org>
Subject: [PATCH Part2 v6 13/49] crypto:ccp: Provide APIs to issue SEV-SNP commands
From: Brijesh Singh <brijesh.singh@....com>
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 | 73 ++++++++++++++++++++++++++++++++++++
2 files changed, 97 insertions(+)
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index f1173221d0b9..35d76333e120 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1205,6 +1205,30 @@ 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 ef4d42e8c96e..9f921d221b75 100644
--- a/include/linux/psp-sev.h
+++ b/include/linux/psp-sev.h
@@ -881,6 +881,64 @@ 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 */
@@ -908,6 +966,21 @@ 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__ */
--
2.25.1
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