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nEPT: Redefine EPT-specific link_shadow_page()

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Since nEPT doesn't support A/D bit, so we should not set those bit
when build shadow page table.

Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Yang Zhang
2013-08-05 11:07:13 +03:00
committed by Paolo Bonzini
parent 37406aaaee
commit 7a1638ce42
2 changed files with 11 additions and 5 deletions
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12
arch/x86/kvm/mmu.c
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@@ -2047,12 +2047,18 @@ static void shadow_walk_next(struct kvm_shadow_walk_iterator *iterator)
return __shadow_walk_next(iterator, *iterator->sptep);
}
static void link_shadow_page(u64 *sptep, struct kvm_mmu_page *sp)
static void link_shadow_page(u64 *sptep, struct kvm_mmu_page *sp, bool accessed)
{
u64 spte;
BUILD_BUG_ON(VMX_EPT_READABLE_MASK != PT_PRESENT_MASK ||
VMX_EPT_WRITABLE_MASK != PT_WRITABLE_MASK);
spte = __pa(sp->spt) | PT_PRESENT_MASK | PT_WRITABLE_MASK |
shadow_user_mask | shadow_x_mask | shadow_accessed_mask;
shadow_user_mask | shadow_x_mask;
if (accessed)
spte |= shadow_accessed_mask;
mmu_spte_set(sptep, spte);
}
@@ -2677,7 +2683,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
iterator.level - 1,
1, ACC_ALL, iterator.sptep);
link_shadow_page(iterator.sptep, sp);
link_shadow_page(iterator.sptep, sp, true);
}
}
return emulate;