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KVM: MMU: rename has_wrprotected_page to mmu_gfn_lpage_is_disallowed

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kvm_lpage_info->write_count is used to detect if the large page mapping
for the gfn on the specified level is allowed, rename it to disallow_lpage
to reflect its purpose, also we rename has_wrprotected_page() to
mmu_gfn_lpage_is_disallowed() to make the code more clearer

Later we will extend this mechanism for page tracking: if the gfn is
tracked then large mapping for that gfn on any level is not allowed.
The new name is more straightforward

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiao Guangrong
2016-02-24 17:51:06 +08:00
zatwierdzone przez Paolo Bonzini
rodzic 4d99ba898d
commit 92f94f1e9e
4 zmienionych plików z 25 dodań i 22 usunięć
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14
arch/x86/kvm/x86.c
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@@ -7879,6 +7879,7 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
int i;
for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
struct kvm_lpage_info *linfo;
unsigned long ugfn;
int lpages;
int level = i + 1;
@@ -7893,15 +7894,16 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
if (i == 0)
continue;
slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages *
sizeof(*slot->arch.lpage_info[i - 1]));
if (!slot->arch.lpage_info[i - 1])
linfo = kvm_kvzalloc(lpages * sizeof(*linfo));
if (!linfo)
goto out_free;
slot->arch.lpage_info[i - 1] = linfo;
if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
slot->arch.lpage_info[i - 1][0].write_count = 1;
linfo[0].disallow_lpage = 1;
if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1;
linfo[lpages - 1].disallow_lpage = 1;
ugfn = slot->userspace_addr >> PAGE_SHIFT;
/*
* If the gfn and userspace address are not aligned wrt each
@@ -7913,7 +7915,7 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
unsigned long j;
for (j = 0; j < lpages; ++j)
slot->arch.lpage_info[i - 1][j].write_count = 1;
linfo[j].disallow_lpage = 1;
}
}