Commit 3af91068 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: Add kvm_release_page_unused() API to put pages that KVM never consumes 



Add an API to release an unused page, i.e. to put a page without marking
it accessed or dirty.  The API will be used when KVM faults-in a page but
bails before installing the guest mapping (and other similar flows).

Reviewed-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Tested-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Tested-by: default avatarDmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241010182427.1434605-4-seanjc@google.com>
parent 85e88b2b

include/linux/kvm_host.h

+9 −0
Original line number Diff line number Diff line
@@ -1216,6 +1216,15 @@ unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable); 
unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);

unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,

				      bool *writable);



static inline void kvm_release_page_unused(struct page *page)

{

	if (!page)

		return;



	put_page(page);

}



void kvm_release_page_clean(struct page *page);

void kvm_release_page_dirty(struct page *page);