On 3/4/22 9:53 AM, Borislav Petkov wrote: > On Fri, Mar 04, 2022 at 09:39:16AM -0600, Brijesh Singh wrote: >> Depending on which ioctl user want to use for querying the attestation >> report, she need to look at the SNP/GHCB specification for more details. >> The blob contains header that application need to parse to get to the >> actual certificate. The header is defined in the spec. From kernel >> driver point-of-view, all these are opaque data. > ... and the ioctl text needs to point to the spec so that the user knows > where to find everything needed. Or how do you expect people to know how > to use those ioctls? I did added a text in Documentation/virt/coco/sevguest.rst (section 2.3) that user need to look the GHCB spec for further detail.