Messages in this thread Patch in this message | | | Date | Mon, 26 Jun 2023 18:20:15 +0000 | Subject | [PATCH v2 5/6] KVM: Documentation: Add the missing description for mmu_valid_gen into kvm_mmu_page | From | Mingwei Zhang <> |
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Add the description for mmu_valid_gen into kvm_mmu_page description. mmu_valid_gen is used in shadow MMU for fast zapping. Update the doc to reflect that.
Signed-off-by: Mingwei Zhang <mizhang@google.com> Reviewed-by: Kai Huang <kai.huang@intel.com> --- Documentation/virt/kvm/x86/mmu.rst | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/Documentation/virt/kvm/x86/mmu.rst b/Documentation/virt/kvm/x86/mmu.rst index 97d695207e11..cc4bd190c93d 100644 --- a/Documentation/virt/kvm/x86/mmu.rst +++ b/Documentation/virt/kvm/x86/mmu.rst @@ -208,6 +208,10 @@ Shadow pages contain the following information: The page is not backed by a guest page table, but its first entry points to one. This is set if NPT uses 5-level page tables (host CR4.LA57=1) and is shadowing L1's 4-level NPT (L1 CR4.LA57=1). + mmu_valid_gen: + Used by comparing against kvm->arch.mmu_valid_gen to check whether the + shadow page is obsolete thus a convenient variable for fast zapping. + Note that TDP MMU does not use mmu_valid_gen. gfn: Either the guest page table containing the translations shadowed by this page, or the base page frame for linear translations. See role.direct. -- 2.41.0.162.gfafddb0af9-goog
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