[Part2,v6.1,15/38] crypto: ccp: Implement SEV_PEK_GEN ioctl command

Commit Message

Brijesh Singh Oct. 30, 2017, 3:13 a.m. UTC

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 <[e-mail]>
Cc: "Radim Krčmář" <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Herbert Xu <[e-mail]>
Cc: Gary Hook <[e-mail]>
Cc: Tom Lendacky <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Reviewed-by: Borislav Petkov <[e-mail]>
Improvements-by: Borislav Petkov <[e-mail]>
Signed-off-by: Brijesh Singh <[e-mail]>
Acked-by: Gary R Hook <[e-mail]>
---

Boris,

I had your R-b in v6 and have kept it. The changes in this patch are
very minor. Let me know if you are okay with it - thanks

Changes since v6:
 * use psp->sev_state to check if FW is in correct state before
   doing the INIT transition

 drivers/crypto/ccp/psp-dev.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

Patch

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index 24a970809ded..53fbbc41b521 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -240,6 +240,19 @@  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(NULL, &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;
@@ -268,6 +281,9 @@  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;