crypto: ccp: Implement SEV_PEK_GEN ioctl command

Web:        https://git.kernel.org/torvalds/c/4d84b726be834d4991b94fd51df66ec299b66d45
Commit:     4d84b726be834d4991b94fd51df66ec299b66d45
Parent:     efe1829b1a8fb7a8e69791141b8c8f6291708863
Refname:    refs/heads/master
Author:     Brijesh Singh <[email protected]>
AuthorDate: Mon Dec 4 10:57:30 2017 -0600
Committer:  Brijesh Singh <[email protected]>
CommitDate: Mon Dec 4 10:57:30 2017 -0600

    crypto: ccp: Implement SEV_PEK_GEN ioctl command
    
    The SEV_PEK_GEN command is used to generate a new Platform Endorsement
    Key (PEK). The command is defined in SEV spec section 5.6.
    
    Cc: Paolo Bonzini <[email protected]>
    Cc: "Radim Krčmář" <[email protected]>
    Cc: Borislav Petkov <[email protected]>
    Cc: Herbert Xu <[email protected]>
    Cc: Gary Hook <[email protected]>
    Cc: Tom Lendacky <[email protected]>
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Reviewed-by: Borislav Petkov <[email protected]>
    Improvements-by: Borislav Petkov <[email protected]>
    Signed-off-by: Brijesh Singh <[email protected]>
    Acked-by: Gary R Hook <[email protected]>
---
 drivers/crypto/ccp/psp-dev.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index a5072b166ab8..8aa8036023e0 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -289,6 +289,19 @@ static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp)
 	return ret;
 }
 
+static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp)
+{
+	int rc;
+
+	if (psp_master->sev_state == SEV_STATE_UNINIT) {
+		rc = __sev_platform_init_locked(&argp->error);
+		if (rc)
+			return rc;
+	}
+
+	return __sev_do_cmd_locked(cmd, 0, &argp->error);
+}
+
 static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
@@ -317,6 +330,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
 	case SEV_PLATFORM_STATUS:
 		ret = sev_ioctl_do_platform_status(&input);
 		break;
+	case SEV_PEK_GEN:
+		ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input);
+		break;
 	default:
 		ret = -EINVAL;
 		goto out;
--
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