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SubjectRe: [Part2 PATCH v6 15/38] crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl command
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On 10/19/2017 09:33 PM, Brijesh Singh wrote:
> The SEV_PLATFORM_STATUS command can be used by the platform owner to
> get the current status of the platform. The command is defined in
> SEV spec section 5.5.
>
> 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
> 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>

> ---
> drivers/crypto/ccp/psp-dev.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
> index 99f3761206da..5c921b36bc23 100644
> --- a/drivers/crypto/ccp/psp-dev.c
> +++ b/drivers/crypto/ccp/psp-dev.c
> @@ -174,6 +174,27 @@ static int sev_do_cmd(int cmd, void *data, int *psp_ret)
> return ret;
> }
>
> +static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp)
> +{
> + struct sev_user_data_status *data;
> + int ret;
> +
> + data = kzalloc(sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + ret = sev_do_cmd(SEV_CMD_PLATFORM_STATUS, data, &argp->error);
> + if (ret)
> + goto e_free;
> +
> + if (copy_to_user((void __user *)argp->data, data, sizeof(*data)))
> + ret = -EFAULT;
> +
> +e_free:
> + kfree(data);
> + return ret;
> +}
> +
> static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
> {
> void __user *argp = (void __user *)arg;
> @@ -194,6 +215,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
> case SEV_FACTORY_RESET:
> ret = sev_do_cmd(SEV_CMD_FACTORY_RESET, 0, &input.error);
> break;
> + case SEV_PLATFORM_STATUS:
> + ret = sev_ioctl_do_platform_status(&input);
> + break;
> default:
> ret = -EINVAL;
> goto out;
>

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