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KVM: pass kvm_memory_slot to gfn_to_page_many_atomic

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The memory slot is already available from gfn_to_memslot_dirty_bitmap.
Isn't it a shame to look it up again?  Plus, it makes gfn_to_page_many_atomic
agnostic of multiple VCPU address spaces.

Reviewed-by: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-05-19 16:01:50 +02:00
parent f36f3f2846
commit d9ef13c2b3
3 changed files with 9 additions and 7 deletions
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6
arch/x86/kvm/mmu.c
View File

@ -2728,15 +2728,17 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu,
u64 *start, u64 *end)
{
struct page *pages[PTE_PREFETCH_NUM];
struct kvm_memory_slot *slot;
unsigned access = sp->role.access;
int i, ret;
gfn_t gfn;
gfn = kvm_mmu_page_get_gfn(sp, start - sp->spt);
if (!gfn_to_memslot_dirty_bitmap(vcpu, gfn, access & ACC_WRITE_MASK))
slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, access & ACC_WRITE_MASK);
if (!slot)
return -1;
ret = gfn_to_page_many_atomic(vcpu->kvm, gfn, pages, end - start);
ret = gfn_to_page_many_atomic(slot, gfn, pages, end - start);
if (ret <= 0)
return -1;

4
include/linux/kvm_host.h
View File

@ -526,8 +526,8 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm);
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot);
int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
int nr_pages);
int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
struct page **pages, int nr_pages);
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);

6
virt/kvm/kvm_main.c
View File

@ -1428,13 +1428,13 @@ pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic);
int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
int nr_pages)
int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
struct page **pages, int nr_pages)
{
unsigned long addr;
gfn_t entry;
addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry);
addr = gfn_to_hva_many(slot, gfn, &entry);
if (kvm_is_error_hva(addr))
return -1;