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Subject[RFC V2 9/9] Handle certain mmu exposed functions properly while turn on direct build EPT mode
Date
From: Yulei Zhang <yulei.kernel@gmail.com>

Signed-off-by: Yulei Zhang <yuleixzhang@tencent.com>
---
arch/x86/kvm/mmu/mmu.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 6639d9c7012e..35bd87bf965f 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1719,6 +1719,9 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
int i;
bool write_protected = false;

+ if (kvm->arch.global_root_hpa)
+ return write_protected;
+
for (i = PG_LEVEL_4K; i <= KVM_MAX_HUGEPAGE_LEVEL; ++i) {
rmap_head = __gfn_to_rmap(gfn, i, slot);
write_protected |= __rmap_write_protect(kvm, rmap_head, true);
@@ -5862,6 +5865,9 @@ static void kvm_zap_obsolete_pages(struct kvm *kvm)
*/
static void kvm_mmu_zap_all_fast(struct kvm *kvm)
{
+ if (kvm->arch.global_root_hpa)
+ return;
+
lockdep_assert_held(&kvm->slots_lock);

spin_lock(&kvm->mmu_lock);
@@ -5924,6 +5930,9 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end)
struct kvm_memory_slot *memslot;
int i;

+ if (kvm->arch.global_root_hpa)
+ return;
+
spin_lock(&kvm->mmu_lock);
for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
slots = __kvm_memslots(kvm, i);
--
2.17.1
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