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KVM: Integrate gfn_to_memslot_approx() into search_memslots()

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s390 arch has gfn_to_memslot_approx() which is almost identical to
search_memslots(), differing only in that in case the gfn falls in a hole
one of the memslots bordering the hole is returned.

Add this lookup mode as an option to search_memslots() so we don't have two
almost identical functions for looking up a memslot by its gfn.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
[sean: tweaked helper names to keep gfn_to_memslot_approx() in s390]
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <171cd89b52c718dbe180ecd909b4437a64a7e2ec.1638817640.git.maciej.szmigiero@oracle.com>
This commit is contained in:
Maciej S. Szmigiero
2021-12-06 20:54:25 +01:00
committed by Paolo Bonzini
parent f5756029ee
commit c928bfc263
3 changed files with 36 additions and 46 deletions
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2
virt/kvm/kvm_main.c
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@ -2141,7 +2141,7 @@ struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn
* search_memslots() instead of __gfn_to_memslot() to avoid
* thrashing the VM-wide last_used_index in kvm_memslots.
*/
slot = search_memslots(slots, gfn, &slot_index);
slot = search_memslots(slots, gfn, &slot_index, false);
if (slot) {
vcpu->last_used_slot = slot_index;
return slot;