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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-07-02 19:35:33 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-09 13:29:40 -0400 |
| commit | 171a90d70f25c2501162aef5f42eba5fc91c054a (patch) | |
| tree | 2e05af6939274d065f77f4adeae8147736686d46 /arch/x86/kvm/mmu/mmu.c | |
| parent | 531281ad98ba7e681e0f8fa3c6d216032a08a123 (diff) | |
| download | lwn-171a90d70f25c2501162aef5f42eba5fc91c054a.tar.gz lwn-171a90d70f25c2501162aef5f42eba5fc91c054a.zip | |
KVM: x86/mmu: Separate the memory caches for shadow pages and gfn arrays
Use separate caches for allocating shadow pages versus gfn arrays. This
sets the stage for specifying __GFP_ZERO when allocating shadow pages
without incurring extra cost for gfn arrays.
No functional change intended.
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703023545.8771-10-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index be6ca862531f..a8fc17ac7ed0 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -1109,8 +1109,12 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) 1 + PT64_ROOT_MAX_LEVEL + PTE_PREFETCH_NUM); if (r) return r; - r = mmu_topup_memory_cache(&vcpu->arch.mmu_page_cache, - 2 * PT64_ROOT_MAX_LEVEL); + r = mmu_topup_memory_cache(&vcpu->arch.mmu_shadow_page_cache, + PT64_ROOT_MAX_LEVEL); + if (r) + return r; + r = mmu_topup_memory_cache(&vcpu->arch.mmu_gfn_array_cache, + PT64_ROOT_MAX_LEVEL); if (r) return r; return mmu_topup_memory_cache(&vcpu->arch.mmu_page_header_cache, @@ -1120,7 +1124,8 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) static void mmu_free_memory_caches(struct kvm_vcpu *vcpu) { mmu_free_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache); - mmu_free_memory_cache(&vcpu->arch.mmu_page_cache); + mmu_free_memory_cache(&vcpu->arch.mmu_shadow_page_cache); + mmu_free_memory_cache(&vcpu->arch.mmu_gfn_array_cache); mmu_free_memory_cache(&vcpu->arch.mmu_page_header_cache); } @@ -2082,9 +2087,9 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, int direct struct kvm_mmu_page *sp; sp = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache); - sp->spt = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_cache); + sp->spt = mmu_memory_cache_alloc(&vcpu->arch.mmu_shadow_page_cache); if (!direct) - sp->gfns = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_cache); + sp->gfns = mmu_memory_cache_alloc(&vcpu->arch.mmu_gfn_array_cache); set_page_private(virt_to_page(sp->spt), (unsigned long)sp); /* |