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KVM: Documentation: Add the missing description for ptep in kvm_mmu_page

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Add the missing description for ptep in kvm_mmu_page description. ptep is
used when TDP MMU is enabled and it shares the storage with parent_ptes.
Update the doc to help readers to get up-to-date info.

Signed-off-by: Mingwei Zhang <mizhang@google.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230912184553.1887764-4-mizhang@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Mingwei Zhang 2023-09-12 18:45:50 +00:00 committed by Sean Christopherson
parent fdaca560b6
commit b40a2455e9
1 changed files with 3 additions and 0 deletions
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Documentation/virt/kvm/x86/mmu.rst
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@ -239,6 +239,9 @@ Shadow pages contain the following information:
parent_ptes points at this single spte, otherwise, there exists multiple
sptes pointing at this page and (parent_ptes & ~0x1) points at a data
structure with a list of parent sptes.
ptep:
The kernel virtual address of the SPTE that points at this shadow page.
Used exclusively by the TDP MMU, this field is a union with parent_ptes.
unsync:
If true, then the translations in this page may not match the guest's
translation. This is equivalent to the state of the tlb when a pte is