On 10/23/2017 04:55 PM, Brijesh Singh wrote:
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@xxxxxxxxxx> Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxx> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Cc: Gary Hook <gary.hook@xxxxxxx> Cc: Tom Lendacky <thomas.lendacky@xxxxxxx> Cc: linux-crypto@xxxxxxxxxxxxxxx Cc: kvm@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
Acked-by: Gary R Hook <gary.hook@xxxxxxx>
--- Changes since v6: * when sev_do_cmd() and sev_platform_shutdown() fails then propogate the error status code from sev_do_cmd() because it can give us much better reason for the failure. drivers/crypto/ccp/psp-dev.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index dd4bab143de9..18e2d8291997 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -195,6 +195,34 @@ 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 ret, err; + + ret = sev_platform_init(NULL, &argp->error); + if (ret) + return ret; + + ret = sev_do_cmd(cmd, 0, &argp->error); + + if (sev_platform_shutdown(&err)) { + /* + * If both sev_do_cmd() and sev_platform_shutdown() commands + * failed then propogate the error code from the sev_do_cmd() + * because it contains a useful status code for the command + * failure. + */ + if (ret) + goto done; + + argp->error = err; + ret = -EIO; + } + +done: + return ret; +} + static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; @@ -218,6 +246,9 @@ 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;
