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SubjectRe: [Part2 PATCH v6.1 16/38] crypto: ccp: Implement SEV_PEK_GEN ioctl command
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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@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
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>

Acked-by: Gary R Hook <gary.hook@amd.com>

> ---
>
> 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;
>

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