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KVM: Remove unused kvm_vcpu_gfn_to_pfn_atomic

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The last use of kvm_vcpu_gfn_to_pfn_atomic was removed by commit
1bbc60d0c7 ("KVM: x86/mmu: Remove MMU auditing")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Message-ID: <20241001141354.18009-3-linux@treblig.org>
[Adjust Documentation/virt/kvm/locking.rst. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2024-10-01 15:13:54 +01:00 committed by Paolo Bonzini
parent 88a387cf9e
commit bc07eea2f3
3 changed files with 1 additions and 8 deletions
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2
Documentation/virt/kvm/locking.rst
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@ -136,7 +136,7 @@ For direct sp, we can easily avoid it since the spte of direct sp is fixed
to gfn. For indirect sp, we disabled fast page fault for simplicity. to gfn. For indirect sp, we disabled fast page fault for simplicity.
A solution for indirect sp could be to pin the gfn, for example via A solution for indirect sp could be to pin the gfn, for example via
kvm_vcpu_gfn_to_pfn_atomic, before the cmpxchg. After the pinning: gfn_to_pfn_memslot_atomic, before the cmpxchg. After the pinning:
- We have held the refcount of pfn; that means the pfn can not be freed and - We have held the refcount of pfn; that means the pfn can not be freed and
be reused for another gfn. be reused for another gfn.

1
include/linux/kvm_host.h
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@ -1313,7 +1313,6 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu); struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn); struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map); int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map);
void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty); void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty);
unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn); unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);

6
virt/kvm/kvm_main.c
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@ -3035,12 +3035,6 @@ kvm_pfn_t gfn_to_pfn_memslot_atomic(const struct kvm_memory_slot *slot, gfn_t gf
} }
EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic); EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic);
kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn)
{
return gfn_to_pfn_memslot_atomic(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_pfn_atomic);
kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
{ {
return gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn); return gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn);