KVM: MMU: Rename kvm_mmu_free_some_pages() to make_mmu_pages_available()

The current name "kvm_mmu_free_some_pages" should be used for something
that actually frees some shadow pages, as we expect from the name, but
what the function is doing is to make some, KVM_MIN_FREE_MMU_PAGES,
shadow pages available: it does nothing when there are enough.

This patch changes the name to reflect this meaning better; while doing
this renaming, the code in the wrapper function is inlined into the main
body since the whole function will be inlined into the only caller now.

Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 38f34c5..633e30c 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1501,12 +1501,14 @@ static void drop_parent_pte(struct kvm_mmu_page *sp,
        mmu_spte_clear_no_track(parent_pte);
 }
 
+static void make_mmu_pages_available(struct kvm_vcpu *vcpu);
+
 static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
                                               u64 *parent_pte, int direct)
 {
        struct kvm_mmu_page *sp;
 
-       kvm_mmu_free_some_pages(vcpu);
+       make_mmu_pages_available(vcpu);
 
        sp = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache);
        sp->spt = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_cache);
@@ -4010,10 +4012,13 @@ int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page_virt);
 
-void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
+static void make_mmu_pages_available(struct kvm_vcpu *vcpu)
 {
        LIST_HEAD(invalid_list);
 
+       if (likely(kvm_mmu_available_pages(vcpu->kvm) >= KVM_MIN_FREE_MMU_PAGES))
+               return;
+
        while (kvm_mmu_available_pages(vcpu->kvm) < KVM_REFILL_PAGES) {
                if (!prepare_zap_oldest_mmu_page(vcpu->kvm, &invalid_list))
                        break;

diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 3b1ad00..2adcbc2 100644 (file)
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -64,12 +64,6 @@ static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm)
        return 0;
 }
 
-static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
-{
-       if (unlikely(kvm_mmu_available_pages(vcpu->kvm)< KVM_MIN_FREE_MMU_PAGES))
-               __kvm_mmu_free_some_pages(vcpu);
-}
-
 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
 {
        if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))