On Thu, Aug 12, 2021 at 12:33:11PM -0700, Andi Kleen wrote: > > On 8/12/2021 3:10 AM, Kirill A. Shutemov wrote: > > On Thu, Aug 12, 2021 at 10:23:24AM +0200, Joerg Roedel wrote: > > > Hi Kirill, > > > > > > On Tue, Aug 10, 2021 at 09:26:21AM +0300, Kirill A. Shutemov wrote: > > > > Accepting happens via a protocol specific for the Virtrual Machine > > > > platform. > > > That sentence bothers me a bit. Can you explain what it VMM specific in > > > the acceptance protocol? > > For TDX we have a signle MapGPA hypercall to VMM plus TDAcceptPage for > > every accepted page to TDX Module. SEV-SNP has to something similar. > > > I think Joerg's question was if TDX has a single ABI for all hypervisors. > The GHCI specification supports both hypervisor specific and hypervisor > agnostic calls. But these basic operations like MapGPA are all hypervisor > agnostic. The only differences would be in the existing hypervisor specific > PV code. My point was that TDX and SEV-SNP going to be different and we need a way to hook the right protocol for each. -- Kirill A. Shutemov
