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authorXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>2012-08-03 15:37:54 +0800
committerAvi Kivity <avi@redhat.com>2012-08-06 16:04:50 +0300
commit6c8ee57be9350c5c2cafdd6a99d0462d528676e2 (patch)
treeb2ce398a6613895bc94b975ab00f787baf830b2d
parent16b854c889673d988285719bc020543a730f9ac6 (diff)
downloadvexpress-lsk-6c8ee57be9350c5c2cafdd6a99d0462d528676e2.tar.gz
KVM: introduce KVM_PFN_ERR_FAULT
After that, the exported and un-inline function, get_fault_pfn, can be removed Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/kvm/mmu.c2
-rw-r--r--include/linux/kvm_host.h3
-rw-r--r--virt/kvm/kvm_main.c12
3 files changed, 6 insertions, 11 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index aa9a987ddef..9cf90c8d584 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2512,7 +2512,7 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn,
slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log);
if (!slot)
- return get_fault_pfn();
+ return KVM_PFN_ERR_FAULT;
hva = gfn_to_hva_memslot(slot, gfn);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 3c16f0f1fe3..ef5554f4748 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -48,6 +48,8 @@
#define KVM_MAX_MMIO_FRAGMENTS \
(KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
+#define KVM_PFN_ERR_FAULT (-EFAULT)
+
/*
* vcpu->requests bit members
*/
@@ -443,7 +445,6 @@ void kvm_release_pfn_clean(pfn_t pfn);
void kvm_set_pfn_dirty(pfn_t pfn);
void kvm_set_pfn_accessed(pfn_t pfn);
void kvm_get_pfn(pfn_t pfn);
-pfn_t get_fault_pfn(void);
int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
int len);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 14ec567816a..ef0491645a1 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -939,12 +939,6 @@ static pfn_t get_bad_pfn(void)
return -ENOENT;
}
-pfn_t get_fault_pfn(void)
-{
- return -EFAULT;
-}
-EXPORT_SYMBOL_GPL(get_fault_pfn);
-
static pfn_t get_hwpoison_pfn(void)
{
return -EHWPOISON;
@@ -1115,7 +1109,7 @@ static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
struct vm_area_struct *vma;
if (atomic)
- return get_fault_pfn();
+ return KVM_PFN_ERR_FAULT;
down_read(&current->mm->mmap_sem);
if (npages == -EHWPOISON ||
@@ -1127,7 +1121,7 @@ static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
vma = find_vma_intersection(current->mm, addr, addr+1);
if (vma == NULL)
- pfn = get_fault_pfn();
+ pfn = KVM_PFN_ERR_FAULT;
else if ((vma->vm_flags & VM_PFNMAP)) {
pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) +
vma->vm_pgoff;
@@ -1135,7 +1129,7 @@ static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
} else {
if (async && (vma->vm_flags & VM_WRITE))
*async = true;
- pfn = get_fault_pfn();
+ pfn = KVM_PFN_ERR_FAULT;
}
up_read(&current->mm->mmap_sem);
} else