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From 17db835d27c0176abe8fa32ca12522693514906c Mon Sep 17 00:00:00 2001
From: Brijesh Singh <brijesh.singh@amd.com>
Date: Mon, 4 Dec 2017 10:57:29 -0600
Subject: [PATCH 26/95] crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl
command
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
Reviewed-by: Borislav Petkov <bp@suse.de>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
---
drivers/crypto/ccp/psp-dev.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index b49583a4..a5072b1 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -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;
--
2.7.4
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