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Commit 903816fa authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Marcelo Tosatti
Browse files

KVM: using get_fault_pfn to get the fault pfn 



Using get_fault_pfn to cleanup the code

Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 86fde74c

arch/x86/kvm/mmu.c

+2 −4
Original line number Diff line number Diff line
@@ -2513,10 +2513,8 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, 
	unsigned long hva;



	slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log);

	if (!slot) {

		get_page(fault_page);

		return page_to_pfn(fault_page);

	}

	if (!slot)

		return get_fault_pfn();



	hva = gfn_to_hva_memslot(slot, gfn);

include/linux/kvm_host.h

+1 −4
Original line number Diff line number Diff line
@@ -383,15 +383,11 @@ id_to_memslot(struct kvm_memslots *slots, int id) 
static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }



extern struct page *bad_page;

extern struct page *fault_page;



extern pfn_t bad_pfn;

extern pfn_t fault_pfn;



int is_error_page(struct page *page);

int is_error_pfn(pfn_t pfn);

int is_hwpoison_pfn(pfn_t pfn);

int is_fault_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);
@@ -441,6 +437,7 @@ 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

+4 −9
Original line number Diff line number Diff line
@@ -103,8 +103,8 @@ static bool largepages_enabled = true; 
static struct page *hwpoison_page;

static pfn_t hwpoison_pfn;



struct page *fault_page;

pfn_t fault_pfn;

static struct page *fault_page;

static pfn_t fault_pfn;



inline int kvm_is_mmio_pfn(pfn_t pfn)

{
@@ -949,12 +949,6 @@ int is_hwpoison_pfn(pfn_t pfn) 
}

EXPORT_SYMBOL_GPL(is_hwpoison_pfn);



int is_fault_pfn(pfn_t pfn)

{

	return pfn == fault_pfn;

}

EXPORT_SYMBOL_GPL(is_fault_pfn);



int is_noslot_pfn(pfn_t pfn)

{

	return pfn == bad_pfn;
@@ -1038,11 +1032,12 @@ unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) 
}

EXPORT_SYMBOL_GPL(gfn_to_hva);



static pfn_t get_fault_pfn(void)

pfn_t get_fault_pfn(void)

{

	get_page(fault_page);

	return fault_pfn;

}

EXPORT_SYMBOL_GPL(get_fault_pfn);



int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm,

	unsigned long start, int write, struct page **page)