KVM: introduce KVM_PFN_ERR_HWPOISON
Xiao Guangrong [Fri, 3 Aug 2012 07:38:36 +0000 (15:38 +0800)]
Then, get_hwpoison_pfn and is_hwpoison_pfn can be removed

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/mmu.c
include/linux/kvm_host.h
virt/kvm/kvm_main.c

index 9cf90c8..d3cdf69 100644 (file)
@@ -2649,7 +2649,7 @@ static void kvm_send_hwpoison_signal(unsigned long address, struct task_struct *
 static int kvm_handle_bad_page(struct kvm_vcpu *vcpu, gfn_t gfn, pfn_t pfn)
 {
        kvm_release_pfn_clean(pfn);
-       if (is_hwpoison_pfn(pfn)) {
+       if (pfn == KVM_PFN_ERR_HWPOISON) {
                kvm_send_hwpoison_signal(gfn_to_hva(vcpu->kvm, gfn), current);
                return 0;
        }
index ef5554f..840f44a 100644 (file)
@@ -49,6 +49,7 @@
        (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
 
 #define KVM_PFN_ERR_FAULT      (-EFAULT)
+#define KVM_PFN_ERR_HWPOISON   (-EHWPOISON)
 
 /*
  * vcpu->requests bit members
@@ -395,7 +396,6 @@ extern struct page *bad_page;
 
 int is_error_page(struct page *page);
 int is_error_pfn(pfn_t pfn);
-int is_hwpoison_pfn(pfn_t pfn);
 int is_noslot_pfn(pfn_t pfn);
 int is_invalid_pfn(pfn_t pfn);
 int kvm_is_error_hva(unsigned long addr);
index ef04916..7fce2d5 100644 (file)
@@ -939,17 +939,6 @@ static pfn_t get_bad_pfn(void)
        return -ENOENT;
 }
 
-static pfn_t get_hwpoison_pfn(void)
-{
-       return -EHWPOISON;
-}
-
-int is_hwpoison_pfn(pfn_t pfn)
-{
-       return pfn == -EHWPOISON;
-}
-EXPORT_SYMBOL_GPL(is_hwpoison_pfn);
-
 int is_noslot_pfn(pfn_t pfn)
 {
        return pfn == -ENOENT;
@@ -1115,7 +1104,7 @@ static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
                if (npages == -EHWPOISON ||
                        (!async && check_user_page_hwpoison(addr))) {
                        up_read(&current->mm->mmap_sem);
-                       return get_hwpoison_pfn();
+                       return KVM_PFN_ERR_HWPOISON;
                }
 
                vma = find_vma_intersection(current->mm, addr, addr+1);