| Message ID | 20171020023413.122280-15-brijesh.singh@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Oct 19, 2017 at 09:33:49PM -0500, Brijesh Singh wrote: > 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 > Improvements-by: Borislav Petkov <bp@suse.de> > Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> > --- > drivers/crypto/ccp/psp-dev.c | 28 +++++++++++++++++++++++++++- > 1 file changed, 27 insertions(+), 1 deletion(-) Reviewed-by: Borislav Petkov <bp@suse.de>
On 10/19/2017 09:33 PM, Brijesh Singh wrote: > 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 > Improvements-by: Borislav Petkov <bp@suse.de> > Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Acked-by: Gary R Hook <gary.hook@amd.com> > --- > drivers/crypto/ccp/psp-dev.c | 28 +++++++++++++++++++++++++++- > 1 file changed, 27 insertions(+), 1 deletion(-) > > diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c > index e9966d5fc6c4..99f3761206da 100644 > --- a/drivers/crypto/ccp/psp-dev.c > +++ b/drivers/crypto/ccp/psp-dev.c > @@ -176,7 +176,33 @@ static int sev_do_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_MAX) > + return -EINVAL; > + > + switch (input.cmd) { > + > + case SEV_FACTORY_RESET: > + ret = sev_do_cmd(SEV_CMD_FACTORY_RESET, 0, &input.error); > + break; > + default: > + ret = -EINVAL; > + goto out; > + } > + > + if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd))) > + ret = -EFAULT; > +out: > + return ret; > } > > static const struct file_operations sev_fops = { >
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index e9966d5fc6c4..99f3761206da 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -176,7 +176,33 @@ static int sev_do_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_MAX) + return -EINVAL; + + switch (input.cmd) { + + case SEV_FACTORY_RESET: + ret = sev_do_cmd(SEV_CMD_FACTORY_RESET, 0, &input.error); + break; + default: + ret = -EINVAL; + goto out; + } + + if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd))) + ret = -EFAULT; +out: + return ret; } static const struct file_operations sev_fops = {
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 Improvements-by: Borislav Petkov <bp@suse.de> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> --- drivers/crypto/ccp/psp-dev.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)