Messages in this thread | | | Subject | Re: [PATCH v2] KVM: x86: use CPUID to locate host page table reserved bits | From | Paolo Bonzini <> | Date | Tue, 10 Dec 2019 10:18:51 +0100 |
| |
On 10/12/19 04:53, Huang, Kai wrote: > Right. Alghouth both MKTME and SME/SEV reduce physical bits, but they treat > those reduced bits differently: MKTME treats those as keyID thus they can be > set, but SME/SEV treats those as reserved bits so you cannot set any of them. > > Maybe the naming of shadow_phys_bits is a little bit confusing here. The purpose > of it was to determine first reserved bits, but not actual physical address bits > . Therefore for MKTME it should include the keyID bits, but for SME/SEV it > should not.
Not just the first reserved bit, but _some_ reserved bit such that all consecutive bits up to bit 51 are reserved.
Paolo
| |