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| author | Mingwei Zhang <mizhang@google.com> | 2023-09-12 18:45:49 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-09-27 13:29:31 -0700 |
| commit | fdaca560b6c4c011d76d24e8a16cb43eae63b25f (patch) | |
| tree | 0c27e74e56c5c0a81c225890c4fe86453e76a499 /Documentation/virt | |
| parent | b207cfbc8c1d04a32d19919a0df9920e909f82a5 (diff) | |
| download | linux-fdaca560b6c4c011d76d24e8a16cb43eae63b25f.tar.gz | |
KVM: Documentation: Update the field name gfns and its description in kvm_mmu_page
Update the field 'gfns' in kvm_mmu_page to 'shadowed_translation' to be
consistent with the code. Also update the corresponding 'gfns' in the
comments. The more detailed description of 'shadowed_translation' is
already inlined in the data structure definition, so no need to duplicate
the text but simply just update the names.
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230912184553.1887764-3-mizhang@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/x86/mmu.rst | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/Documentation/virt/kvm/x86/mmu.rst b/Documentation/virt/kvm/x86/mmu.rst index 47392c5d0a4a3..eb632a24fda1c 100644 --- a/Documentation/virt/kvm/x86/mmu.rst +++ b/Documentation/virt/kvm/x86/mmu.rst @@ -221,11 +221,14 @@ Shadow pages contain the following information: at __pa(sp2->spt). sp2 will point back at sp1 through parent_pte. The spt array forms a DAG structure with the shadow page as a node, and guest pages as leaves. - gfns: - An array of 512 guest frame numbers, one for each present pte. Used to - perform a reverse map from a pte to a gfn. When role.direct is set, any - element of this array can be calculated from the gfn field when used, in - this case, the array of gfns is not allocated. See role.direct and gfn. + shadowed_translation: + An array of 512 shadow translation entries, one for each present pte. Used + to perform a reverse map from a pte to a gfn as well as its access + permission. When role.direct is set, the shadow_translation array is not + allocated. This is because the gfn contained in any element of this array + can be calculated from the gfn field when used. In addition, when + role.direct is set, KVM does not track access permission for each of the + gfn. See role.direct and gfn. root_count: A counter keeping track of how many hardware registers (guest cr3 or pdptrs) are now pointing at the page. While this counter is nonzero, the |