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Commit 6c8ee57b authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Avi Kivity
Browse files

KVM: introduce KVM_PFN_ERR_FAULT 



After that, the exported and un-inline function, get_fault_pfn,
can be removed

Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 16b854c8

arch/x86/kvm/mmu.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

include/linux/kvm_host.h

+2 −1
Original line number Diff line number Diff line
@@ -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);

virt/kvm/kvm_main.c

+3 −9
Original line number Diff line number Diff line
@@ -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