diff options
| author | Sean Christopherson <seanjc@google.com> | 2024-10-10 21:24:27 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-10-25 20:01:35 +0300 |
| commit | 8b15c3764c05ed8766709711d2054d96349dee8e (patch) | |
| tree | 2b28e7b160c28d374682ecf290d2a26796c05044 /include/linux | |
| parent | 93b7da404f5b0b02a4211bbb784889f001d27953 (diff) | |
| download | linux-8b15c3764c05ed8766709711d2054d96349dee8e.tar.xz | |
KVM: Don't grab reference on VM_MIXEDMAP pfns that have a "struct page"
Now that KVM no longer relies on an ugly heuristic to find its struct page
references, i.e. now that KVM can't get false positives on VM_MIXEDMAP
pfns, remove KVM's hack to elevate the refcount for pfns that happen to
have a valid struct page. In addition to removing a long-standing wart
in KVM, this allows KVM to map non-refcounted struct page memory into the
guest, e.g. for exposing GPU TTM buffers to KVM guests.
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: <20241010182427.1434605-86-seanjc@google.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kvm_host.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index d045f8310a48..02f0206fd2dc 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1730,9 +1730,6 @@ void kvm_arch_sync_events(struct kvm *kvm); int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); -struct page *kvm_pfn_to_refcounted_page(kvm_pfn_t pfn); -bool kvm_is_zone_device_page(struct page *page); - struct kvm_irq_ack_notifier { struct hlist_node link; unsigned gsi; |