lkml.org 
[lkml]   [2017]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[Part2 PATCH v5.1 12.3/31] crypto: ccp: Implement SEV_FACTORY_RESET ioctl command
Date
The SEV_FACTORY_RESET command can be used by the platform owner to
reset the non-volatile SEV related data. The command is defined in
SEV spec section 5.4

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>
---
drivers/crypto/ccp/psp-dev.c | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index e9b776c3acb2..94a08c371bda 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -179,7 +179,34 @@ static int sev_handle_cmd(int cmd, void *data, int *psp_ret)

static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
{
- return -ENOTTY;
+ void __user *argp = (void __user *)arg;
+ struct sev_issue_cmd input;
+ int ret = -EFAULT;
+
+ if (ioctl != SEV_ISSUE_CMD)
+ return -EINVAL;
+
+ if (copy_from_user(&input, argp, sizeof(struct sev_issue_cmd)))
+ return -EFAULT;
+
+ if (input.cmd > SEV_CMD_MAX)
+ return -EINVAL;
+
+ switch (input.cmd) {
+
+ case SEV_FACTORY_RESET: {
+ ret = sev_handle_cmd(SEV_CMD_FACTORY_RESET, 0, &input.error);
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd)))
+ ret = -EFAULT;
+
+ return ret;
}

const struct file_operations sev_fops = {
--
2.9.5
\
 
 \ /
  Last update: 2017-10-07 03:09    [W:0.297 / U:0.040 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site