KVM: x86/mmu: Rename rmap_write_protect() to kvm_vcpu_write_protect_gfn()

rmap_write_protect() is a poor name because it also write-protects SPTEs
in the TDP MMU, not just SPTEs in the rmap. It is also confusing that
rmap_write_protect() is not a simple wrapper around
__rmap_write_protect(), since that is the common pattern for functions
with double-underscore names.

Rename rmap_write_protect() to kvm_vcpu_write_protect_gfn() to convey
that KVM is write-protecting a specific gfn in the context of a vCPU.

No functional change intended.

Reviewed-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220119230739.2234394-2-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index f45ddae..4f0443a 100644 (file)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1419,7 +1419,7 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
        return write_protected;
 }
 
-static bool rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn)
+static bool kvm_vcpu_write_protect_gfn(struct kvm_vcpu *vcpu, u64 gfn)
 {
        struct kvm_memory_slot *slot;
 
@@ -2022,7 +2022,7 @@ static int mmu_sync_children(struct kvm_vcpu *vcpu,
                bool protected = false;
 
                for_each_sp(pages, sp, parents, i)
-                       protected |= rmap_write_protect(vcpu, sp->gfn);
+                       protected |= kvm_vcpu_write_protect_gfn(vcpu, sp->gfn);
 
                if (protected) {
                        kvm_mmu_remote_flush_or_zap(vcpu->kvm, &invalid_list, true);
@@ -2147,7 +2147,7 @@ trace_get_page:
        hlist_add_head(&sp->hash_link, sp_list);
        if (!direct) {
                account_shadowed(vcpu->kvm, sp);
-               if (level == PG_LEVEL_4K && rmap_write_protect(vcpu, gfn))
+               if (level == PG_LEVEL_4K && kvm_vcpu_write_protect_gfn(vcpu, gfn))
                        kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn, 1);
        }
        trace_kvm_mmu_get_page(sp, true);