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KVM: Convert gfn_to_page() to use kvm_follow_pfn()

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Convert gfn_to_page() to the new kvm_follow_pfn() internal API, which will
eventually allow removing gfn_to_pfn() and kvm_pfn_to_refcounted_page().

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241010182427.1434605-76-seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-10-10 11:24:17 -07:00 committed by Paolo Bonzini
parent ee0fa69354
commit ce6bf70346
1 changed files with 9 additions and 7 deletions
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16
virt/kvm/kvm_main.c
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@ -3139,14 +3139,16 @@ EXPORT_SYMBOL_GPL(kvm_prefetch_pages);
*/
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
kvm_pfn_t pfn;
struct page *refcounted_page = NULL;
struct kvm_follow_pfn kfp = {
.slot = gfn_to_memslot(kvm, gfn),
.gfn = gfn,
.flags = FOLL_WRITE,
.refcounted_page = &refcounted_page,
};
pfn = gfn_to_pfn(kvm, gfn);
if (is_error_noslot_pfn(pfn))
return NULL;
return kvm_pfn_to_refcounted_page(pfn);
(void)kvm_follow_pfn(&kfp);
return refcounted_page;
}
EXPORT_SYMBOL_GPL(gfn_to_page);