From: Sean Christopherson seanjc@google.com
[ Upstream commit c060c72ffeb448fbb5864faa1f672ebfe14dd25f ]
Zap SPTEs that are backed by ZONE_DEVICE pages when zappings SPTEs to rebuild them as huge pages in the TDP MMU. ZONE_DEVICE huge pages are managed differently than "regular" pages and are not compound pages. Likewise, PageTransCompoundMap() will not detect HugeTLB, so switch to PageCompound().
This matches the similar check in kvm_mmu_zap_collapsible_spte.
Cc: Ben Gardon bgardon@google.com Fixes: 14881998566d ("kvm: x86/mmu: Support disabling dirty logging for the tdp MMU") Signed-off-by: Sean Christopherson seanjc@google.com Message-Id: 20210213005015.1651772-2-seanjc@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kvm/mmu/tdp_mmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index b56d604809b8a..17976998bffbc 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1067,7 +1067,8 @@ static void zap_collapsible_spte_range(struct kvm *kvm,
pfn = spte_to_pfn(iter.old_spte); if (kvm_is_reserved_pfn(pfn) || - !PageTransCompoundMap(pfn_to_page(pfn))) + (!PageCompound(pfn_to_page(pfn)) && + !kvm_is_zone_device_pfn(pfn))) continue;
tdp_mmu_set_spte(kvm, &iter, 0);