[Part2 PATCH v6 15/38] crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl command
From: Brijesh Singh <hidden>
Date: 2017-10-20 02:43:17
Also in:
kvm, lkml
Subsystem:
amd cryptographic coprocessor (ccp) driver, crypto api, the rest · Maintainers:
Tom Lendacky, John Allen, Herbert Xu, "David S. Miller", Linus Torvalds
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" <redacted> Cc: Borislav Petkov <redacted> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Gary Hook <redacted> 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 [off-list ref] Signed-off-by: Brijesh Singh <redacted> --- 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