Hi Brijesh, On 20/08/2021 18:19, Brijesh Singh wrote: > Version 2 of GHCB specification defines NAE to get the extended guest > request. It is similar to the SNP_GET_REPORT ioctl. The main difference > is related to the additional data that be returned. The additional > data returned is a certificate blob that can be used by the SNP guest > user. It seems like the SNP_GET_EXT_REPORT ioctl does everything that the SNP_GET_REPORT ioctl does, and more. Why expose SNP_GET_REPORT to userspace at all? -Dov > The certificate blob layout is defined in the GHCB specification. > The driver simply treats the blob as a opaque data and copies it to > userspace. > > Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx> > --- > Documentation/virt/coco/sevguest.rst | 22 +++++ > drivers/virt/coco/sevguest/sevguest.c | 126 ++++++++++++++++++++++++++ > include/uapi/linux/sev-guest.h | 13 +++ > 3 files changed, 161 insertions(+) > [...]
