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Commit efe1829b authored by Brijesh Singh's avatar Brijesh Singh
Browse files

crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl command 



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: default avatarBorislav Petkov <bp@suse.de>
Signed-off-by: default avatarBrijesh Singh <brijesh.singh@amd.com>
Reviewed-by: default avatarBorislav Petkov <bp@suse.de>
Acked-by: default avatarGary R Hook <gary.hook@amd.com>
parent 2960f9a5

drivers/crypto/ccp/psp-dev.c

+18 −0
Original line number Diff line number Diff line
@@ -274,6 +274,21 @@ static int sev_ioctl_do_reset(struct sev_issue_cmd *argp) 
	return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, 0, &argp->error);

}



static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp)

{

	struct sev_user_data_status *data = &psp_master->status_cmd_buf;

	int ret;



	ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error);

	if (ret)

		return ret;



	if (copy_to_user((void __user *)argp->data, data, sizeof(*data)))

		ret = -EFAULT;



	return ret;

}



static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)

{

	void __user *argp = (void __user *)arg;
@@ -299,6 +314,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) 
	case SEV_FACTORY_RESET:

		ret = sev_ioctl_do_reset(&input);

		break;

	case SEV_PLATFORM_STATUS:

		ret = sev_ioctl_do_platform_status(&input);

		break;

	default:

		ret = -EINVAL;

		goto out;