提交 32cad84f 编写于 作者: X Xiao Guangrong 提交者: Avi Kivity

KVM: do not release the error page

After commit a2766325, the error page is replaced by the
error code, it need not be released anymore

[ The patch has been compiling tested for powerpc ]
Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
上级 cb9aaa30
......@@ -319,7 +319,6 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
if (is_error_page(new_page)) {
printk(KERN_ERR "Couldn't get guest page for gfn %llx!\n",
(unsigned long long)gfn);
kvm_release_page_clean(new_page);
return;
}
hpaddr = page_to_phys(new_page);
......
......@@ -242,10 +242,8 @@ static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
int i;
hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
if (is_error_page(hpage)) {
kvm_release_page_clean(hpage);
if (is_error_page(hpage))
return;
}
hpage_offset = pte->raddr & ~PAGE_MASK;
hpage_offset &= ~0xFFFULL;
......
......@@ -2105,7 +2105,6 @@ static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
return kmap(page);
error:
kvm_release_page_clean(page);
kvm_inject_gp(&svm->vcpu, 0);
return NULL;
......
......@@ -596,10 +596,9 @@ static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu)
static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr)
{
struct page *page = gfn_to_page(vcpu->kvm, addr >> PAGE_SHIFT);
if (is_error_page(page)) {
kvm_release_page_clean(page);
if (is_error_page(page))
return NULL;
}
return page;
}
......
......@@ -1639,10 +1639,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
vcpu->arch.time_page =
gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
if (is_error_page(vcpu->arch.time_page)) {
kvm_release_page_clean(vcpu->arch.time_page);
if (is_error_page(vcpu->arch.time_page))
vcpu->arch.time_page = NULL;
}
break;
}
case MSR_KVM_ASYNC_PF_EN:
......@@ -3945,10 +3944,8 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
goto emul_write;
page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
if (is_error_page(page)) {
kvm_release_page_clean(page);
if (is_error_page(page))
goto emul_write;
}
kaddr = kmap_atomic(page);
kaddr += offset_in_page(gpa);
......
......@@ -457,7 +457,7 @@ pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
bool *writable);
pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
void kvm_release_pfn_dirty(pfn_t);
void kvm_release_pfn_dirty(pfn_t pfn);
void kvm_release_pfn_clean(pfn_t pfn);
void kvm_set_pfn_dirty(pfn_t pfn);
void kvm_set_pfn_accessed(pfn_t pfn);
......
......@@ -111,7 +111,7 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu)
list_entry(vcpu->async_pf.done.next,
typeof(*work), link);
list_del(&work->link);
if (work->page)
if (!is_error_page(work->page))
kvm_release_page_clean(work->page);
kmem_cache_free(async_pf_cache, work);
}
......@@ -138,7 +138,7 @@ void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
list_del(&work->queue);
vcpu->async_pf.queued--;
if (work->page)
if (!is_error_page(work->page))
kvm_release_page_clean(work->page);
kmem_cache_free(async_pf_cache, work);
}
......
......@@ -1186,8 +1186,9 @@ EXPORT_SYMBOL_GPL(gfn_to_page);
void kvm_release_page_clean(struct page *page)
{
if (!is_error_page(page))
kvm_release_pfn_clean(page_to_pfn(page));
WARN_ON(is_error_page(page));
kvm_release_pfn_clean(page_to_pfn(page));
}
EXPORT_SYMBOL_GPL(kvm_release_page_clean);
......
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