Messages in this thread | | | Subject | Re: [Part2 PATCH v6.1 16/38] crypto: ccp: Implement SEV_PEK_GEN ioctl command | From | Gary R Hook <> | Date | Tue, 24 Oct 2017 13:42:21 -0500 |
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On 10/23/2017 04:55 PM, Brijesh Singh wrote: > The SEV_PEK_GEN command is used to generate a new Platform Endorsement > Key (PEK). The command is defined in SEV spec section 5.6. > > 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>
Acked-by: Gary R Hook <gary.hook@amd.com>
> --- > > Changes since v6: > * when sev_do_cmd() and sev_platform_shutdown() fails then propogate > the error status code from sev_do_cmd() because it can give us > much better reason for the failure. > > drivers/crypto/ccp/psp-dev.c | 31 +++++++++++++++++++++++++++++++ > 1 file changed, 31 insertions(+) > > diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c > index dd4bab143de9..18e2d8291997 100644 > --- a/drivers/crypto/ccp/psp-dev.c > +++ b/drivers/crypto/ccp/psp-dev.c > @@ -195,6 +195,34 @@ static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp) > return ret; > } > > +static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp) > +{ > + int ret, err; > + > + ret = sev_platform_init(NULL, &argp->error); > + if (ret) > + return ret; > + > + ret = sev_do_cmd(cmd, 0, &argp->error); > + > + if (sev_platform_shutdown(&err)) { > + /* > + * If both sev_do_cmd() and sev_platform_shutdown() commands > + * failed then propogate the error code from the sev_do_cmd() > + * because it contains a useful status code for the command > + * failure. > + */ > + if (ret) > + goto done; > + > + argp->error = err; > + ret = -EIO; > + } > + > +done: > + return ret; > +} > + > static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) > { > void __user *argp = (void __user *)arg; > @@ -218,6 +246,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) > case SEV_PLATFORM_STATUS: > ret = sev_ioctl_do_platform_status(&input); > break; > + case SEV_PEK_GEN: > + ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input); > + break; > default: > ret = -EINVAL; > goto out; >
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