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KVM: x86: Fix host_mapping_level()

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When found a error hva, should not return PAGE_SIZE but the level...

Also clean up the coding style of the following loop.

Cc: stable@kernel.org
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Sheng Yang 2010-01-05 19:02:28 +08:00 committed by Marcelo Tosatti
parent e1f829b6f4
commit 82b7005f0e
1 changed files with 2 additions and 4 deletions
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6
arch/x86/kvm/mmu.c
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@ -477,7 +477,7 @@ static int host_mapping_level(struct kvm *kvm, gfn_t gfn)
addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr))
return page_size;
return PT_PAGE_TABLE_LEVEL;
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, addr);
@ -515,11 +515,9 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
if (host_level == PT_PAGE_TABLE_LEVEL)
return host_level;
for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level) {
for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level)
if (has_wrprotected_page(vcpu->kvm, large_gfn, level))
break;
}
return level - 1;
}