On Sat, Jul 23, 2022, Sean Christopherson wrote: > Patch 6 from Mingwei is the end goal of the series. KVM incorrectly > assumes that the NX huge page mitigation is the only scenario where KVM > will create a non-leaf page instead of a huge page. Precisely track > (via kvm_mmu_page) if a non-huge page is being forced and use that info > to avoid unnecessarily forcing smaller page sizes in > disallowed_hugepage_adjust(). > > v2: Rebase, tweak a changelog accordingly. hmm, I applied this patch set (v2) on top of kvm/queue (HEAD: 1a4d88a361af) and it seems kvm-unit-tests/vmx failed on both ept=1 and ept=0. And it did not work on our internel kernel either (kernel crashed). Maybe there is still minor issues? > > v1: https://lore.kernel.org/all/20220409003847.819686-1-seanjc@xxxxxxxxxx > > Mingwei Zhang (1): > KVM: x86/mmu: explicitly check nx_hugepage in > disallowed_hugepage_adjust() > > Sean Christopherson (5): > KVM: x86/mmu: Tag disallowed NX huge pages even if they're not tracked > KVM: x86/mmu: Properly account NX huge page workaround for nonpaging > MMUs > KVM: x86/mmu: Set disallowed_nx_huge_page in TDP MMU before setting > SPTE > KVM: x86/mmu: Track the number of TDP MMU pages, but not the actual > pages > KVM: x86/mmu: Add helper to convert SPTE value to its shadow page > > arch/x86/include/asm/kvm_host.h | 17 ++--- > arch/x86/kvm/mmu/mmu.c | 107 ++++++++++++++++++++++---------- > arch/x86/kvm/mmu/mmu_internal.h | 41 +++++++----- > arch/x86/kvm/mmu/paging_tmpl.h | 6 +- > arch/x86/kvm/mmu/spte.c | 11 ++++ > arch/x86/kvm/mmu/spte.h | 17 +++++ > arch/x86/kvm/mmu/tdp_mmu.c | 49 +++++++++------ > arch/x86/kvm/mmu/tdp_mmu.h | 2 + > 8 files changed, 167 insertions(+), 83 deletions(-) > > > base-commit: 1a4d88a361af4f2e91861d632c6a1fe87a9665c2 > -- > 2.37.1.359.gd136c6c3e2-goog >
