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@xxxxxxxxxx>
Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Gary Hook <gary.hook@xxxxxxx>
Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: kvm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
---
drivers/crypto/ccp/psp-dev.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index 94a08c371bda..d68303a06464 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -177,6 +177,36 @@ static int sev_handle_cmd(int cmd, void *data, int *psp_ret)
return ret;
}
+static int sev_ioctl_platform_status(struct sev_issue_cmd *argp)
+{
+ struct sev_user_data_status out;
+ struct sev_data_status *data;
+ int ret;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = sev_handle_cmd(SEV_CMD_PLATFORM_STATUS, data, &argp->error);
+ if (ret)
+ goto e_free;
+
+ out.api_major = data->api_major;
+ out.api_minor = data->api_minor;
+ out.state = data->state;
+ out.owner = data->owner;
+ out.config = data->config;
+ out.build = data->build;
+ out.guest_count = data->guest_count;
+ if (copy_to_user((void __user *)(uintptr_t) argp->data,
+ &out, sizeof(struct sev_user_data_status)))
+ 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;
@@ -198,6 +228,10 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
ret = sev_handle_cmd(SEV_CMD_FACTORY_RESET, 0, &input.error);
break;
}
+ case SEV_PLATFORM_STATUS: {
+ ret = sev_ioctl_platform_status(&input);
+ break;
+ }
default:
ret = -EINVAL;
break;
--
2.9.5
