diff options
| author | Sean Christopherson <seanjc@google.com> | 2024-10-10 20:23:48 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-10-25 19:00:47 +0200 |
| commit | 1fbee5b01a0fd27db571eed757682a7c20045107 (patch) | |
| tree | d50a2e371ec480cfb4a69c6a995205db3dd738a7 /virt/kvm | |
| parent | KVM: guest_memfd: Pass index, not gfn, to __kvm_gmem_get_pfn() (diff) | |
| download | linux-1fbee5b01a0fd27db571eed757682a7c20045107.tar.xz linux-1fbee5b01a0fd27db571eed757682a7c20045107.zip | |
KVM: guest_memfd: Provide "struct page" as output from kvm_gmem_get_pfn()
Provide the "struct page" associated with a guest_memfd pfn as an output
from __kvm_gmem_get_pfn() so that KVM guest page fault handlers can
directly put the page instead of having to rely on
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: <20241010182427.1434605-47-seanjc@google.com>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/guest_memfd.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 8a878e57c5d4..47a9f68f7b24 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -594,7 +594,8 @@ static struct folio *__kvm_gmem_get_pfn(struct file *file, } int kvm_gmem_get_pfn(struct kvm *kvm, struct kvm_memory_slot *slot, - gfn_t gfn, kvm_pfn_t *pfn, int *max_order) + gfn_t gfn, kvm_pfn_t *pfn, struct page **page, + int *max_order) { pgoff_t index = kvm_gmem_get_index(slot, gfn); struct file *file = kvm_gmem_get_file(slot); @@ -615,7 +616,10 @@ int kvm_gmem_get_pfn(struct kvm *kvm, struct kvm_memory_slot *slot, r = kvm_gmem_prepare_folio(kvm, slot, gfn, folio); folio_unlock(folio); - if (r < 0) + + if (!r) + *page = folio_file_page(folio, index); + else folio_put(folio); out: |