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 <[email protected]> Cc: "Radim Krčmář" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Herbert Xu <[email protected]> Cc: Gary Hook <[email protected]> Cc: Tom Lendacky <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Improvements-by: Borislav Petkov <[email protected]> Signed-off-by: Brijesh Singh <[email protected]> --- 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; -- 2.9.5
