Commit 506f0d6f authored by Marcelo Tosatti's avatar Marcelo Tosatti

KVM: introduce gfn_to_pfn_memslot

Which takes a memslot pointer instead of using kvm->memslots.

To be used by SRCU convertion later.
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent f7784b8e
......@@ -273,6 +273,8 @@ void kvm_set_page_dirty(struct page *page);
void kvm_set_page_accessed(struct page *page);
pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn);
void kvm_release_pfn_dirty(pfn_t);
void kvm_release_pfn_clean(pfn_t pfn);
void kvm_set_pfn_dirty(pfn_t pfn);
......
......@@ -835,21 +835,14 @@ unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(gfn_to_hva);
pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr)
{
struct page *page[1];
unsigned long addr;
int npages;
pfn_t pfn;
might_sleep();
addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr)) {
get_page(bad_page);
return page_to_pfn(bad_page);
}
npages = get_user_pages_fast(addr, 1, 1, page);
if (unlikely(npages != 1)) {
......@@ -874,8 +867,32 @@ pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
return pfn;
}
pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
{
unsigned long addr;
addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr)) {
get_page(bad_page);
return page_to_pfn(bad_page);
}
return hva_to_pfn(kvm, addr);
}
EXPORT_SYMBOL_GPL(gfn_to_pfn);
static unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
{
return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
}
pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn)
{
unsigned long addr = gfn_to_hva_memslot(slot, gfn);
return hva_to_pfn(kvm, addr);
}
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
pfn_t pfn;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment