On Wed, Jun 25, 2025 at 05:28:22PM +0800, Yan Zhao wrote: > Write down my understanding to check if it's correct: > > - when a TD is NOT configured to support KVM_LPAGE_GUEST_INHIBIT TDVMCALL, KVM > always maps at 4KB > > - When a TD is configured to support KVM_LPAGE_GUEST_INHIBIT TDVMCALL, Sorry, the two conditions are stale ones. No need any more. So it's always (a) 1. guest accepts at 4KB 2. TDX sets KVM_LPAGE_GUEST_INHIBIT and try splitting.(with write mmu_lock) 3. KVM maps at 4KB (with read mmu_lock) 4. guest's 4KB accept succeeds. (b) 1. guest accepts at 2MB. 2. KVM maps at 4KB due to a certain reason. 3. guest's accept 2MB fails with TDACCEPT_SIZE_MISMATCH. 4. guest accepts at 4KB 5. guest's 4KB accept succeeds.
