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 <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Gary Hook <gary.hook@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-crypto@vger.kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Borislav Petkov <bp@suse.de>
Improvements-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index a5072b1..8aa8036 100644 (file)
--- 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;