[PATCH 01/21] KVM: x86/mmu: Track the associated kmem_cache in the MMU caches
From: Sean Christopherson <hidden>
Date: 2020-06-05 21:39:10
Also in:
kvm, kvmarm, linux-mips, lkml
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Track the kmem_cache used for non-page KVM MMU memory caches instead of passing in the associated kmem_cache when filling the cache. This will allow consolidating code and other cleanups. No functional change intended. Signed-off-by: Sean Christopherson <redacted> --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/mmu/mmu.c | 24 +++++++++++------------- 2 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 1da5858501ca..16347b050754 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h@@ -251,6 +251,7 @@ struct kvm_kernel_irq_routing_entry; */ struct kvm_mmu_memory_cache { int nobjs; + struct kmem_cache *kmem_cache; void *objects[KVM_NR_MEM_OBJS]; };
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index fdd05c233308..0830c195c9ed 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c@@ -1060,15 +1060,14 @@ static void walk_shadow_page_lockless_end(struct kvm_vcpu *vcpu) local_irq_enable(); } -static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, - struct kmem_cache *base_cache, int min) +static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min) { void *obj; if (cache->nobjs >= min) return 0; while (cache->nobjs < ARRAY_SIZE(cache->objects)) { - obj = kmem_cache_zalloc(base_cache, GFP_KERNEL_ACCOUNT); + obj = kmem_cache_zalloc(cache->kmem_cache, GFP_KERNEL_ACCOUNT); if (!obj) return cache->nobjs >= min ? 0 : -ENOMEM; cache->objects[cache->nobjs++] = obj;
@@ -1081,11 +1080,10 @@ static int mmu_memory_cache_free_objects(struct kvm_mmu_memory_cache *cache) return cache->nobjs; } -static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc, - struct kmem_cache *cache) +static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc) { while (mc->nobjs) - kmem_cache_free(cache, mc->objects[--mc->nobjs]); + kmem_cache_free(mc->kmem_cache, mc->objects[--mc->nobjs]); } static int mmu_topup_memory_cache_page(struct kvm_mmu_memory_cache *cache,
@@ -1115,25 +1113,22 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) int r; r = mmu_topup_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache, - pte_list_desc_cache, 8 + PTE_PREFETCH_NUM); + 8 + PTE_PREFETCH_NUM); if (r) goto out; r = mmu_topup_memory_cache_page(&vcpu->arch.mmu_page_cache, 8); if (r) goto out; - r = mmu_topup_memory_cache(&vcpu->arch.mmu_page_header_cache, - mmu_page_header_cache, 4); + r = mmu_topup_memory_cache(&vcpu->arch.mmu_page_header_cache, 4); out: return r; } static void mmu_free_memory_caches(struct kvm_vcpu *vcpu) { - mmu_free_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache, - pte_list_desc_cache); + mmu_free_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache); mmu_free_memory_cache_page(&vcpu->arch.mmu_page_cache); - mmu_free_memory_cache(&vcpu->arch.mmu_page_header_cache, - mmu_page_header_cache); + mmu_free_memory_cache(&vcpu->arch.mmu_page_header_cache); } static void *mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc)
@@ -5684,6 +5679,9 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu) uint i; int ret; + vcpu->arch.mmu_pte_list_desc_cache.kmem_cache = pte_list_desc_cache; + vcpu->arch.mmu_page_header_cache.kmem_cache = mmu_page_header_cache; + vcpu->arch.mmu = &vcpu->arch.root_mmu; vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
--
2.26.0
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