[COMMIT master] KVM: MMU: fix accessed bit set on prefault path

[Avi Kivity]

From: Xiao Guangrong <xiaoguangr...@cn.fujitsu.com>

Retry #PF is the speculative path, so don't set the accessed bit

Signed-off-by: Xiao Guangrong <xiaoguangr...@cn.fujitsu.com>
Signed-off-by: Avi Kivity <a...@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 4954de9..04f9033 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2214,7 +2214,8 @@ static void direct_pte_prefetch(struct kvm_vcpu *vcpu, 
u64 *sptep)
 }
 
 static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
-                       int map_writable, int level, gfn_t gfn, pfn_t pfn)
+                       int map_writable, int level, gfn_t gfn, pfn_t pfn,
+                       bool prefault)
 {
        struct kvm_shadow_walk_iterator iterator;
        struct kvm_mmu_page *sp;
@@ -2229,7 +2230,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, 
int write,
                                pte_access &= ~ACC_WRITE_MASK;
                        mmu_set_spte(vcpu, iterator.sptep, ACC_ALL, pte_access,
                                     0, write, 1, &pt_write,
-                                    level, gfn, pfn, false, map_writable);
+                                    level, gfn, pfn, prefault, map_writable);
                        direct_pte_prefetch(vcpu, iterator.sptep);
                        ++vcpu->stat.pf_fixed;
                        break;
@@ -2321,7 +2322,8 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, 
int write, gfn_t gfn,
        if (mmu_notifier_retry(vcpu, mmu_seq))
                goto out_unlock;
        kvm_mmu_free_some_pages(vcpu);
-       r = __direct_map(vcpu, v, write, map_writable, level, gfn, pfn);
+       r = __direct_map(vcpu, v, write, map_writable, level, gfn, pfn,
+                        prefault);
        spin_unlock(&vcpu->kvm->mmu_lock);
 
 
@@ -2684,7 +2686,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t 
gpa, u32 error_code,
                goto out_unlock;
        kvm_mmu_free_some_pages(vcpu);
        r = __direct_map(vcpu, gpa, write, map_writable,
-                        level, gfn, pfn);
+                        level, gfn, pfn, prefault);
        spin_unlock(&vcpu->kvm->mmu_lock);
 
        return r;
--
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