[PATCH 07/18] KVM: x86/mmu: Use leaf-only loop for walking TDP SPTEs when changing SPTE
From: Sean Christopherson <seanjc@google.com>
Date: 2021-03-26 02:21:25
Also in:
kvm, kvmarm, linux-mips, lkml
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Use the leaf-only TDP iterator when changing the SPTE in reaction to a MMU notifier. Practically speaking, this is a nop since the guts of the loop explicitly looks for 4k SPTEs, which are always leaf SPTEs. Switch the iterator to match age_gfn_range() and test_age_gfn() so that a future patch can consolidate the core iterating logic. No real functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/x86/kvm/mmu/tdp_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 7fe5004b1565..a2b3d9699320 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c@@ -1042,7 +1042,7 @@ static int set_tdp_spte(struct kvm *kvm, struct kvm_memory_slot *slot, new_pfn = pte_pfn(*ptep); - tdp_root_for_each_pte(iter, root, gfn, gfn + 1) { + tdp_root_for_each_leaf_pte(iter, root, gfn, gfn + 1) { if (iter.level != PG_LEVEL_4K) continue;
--
2.31.0.291.g576ba9dcdaf-goog
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