Add a gfp_zero flag to 'struct kvm_mmu_memory_cache' and use it to
control __GFP_ZERO instead of hardcoding a call to kmem_cache_zalloc().
A future patch needs such a flag for the __get_free_page() path, as
gfn arrays do not need/want the allocator to zero the memory. Convert
the kmem_cache paths to __GFP_ZERO now so as to avoid a weird and
inconsistent API in the future.
No functional change intended.
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <
20200703023545.8771-11-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
*/
struct kvm_mmu_memory_cache {
int nobjs;
+ gfp_t gfp_zero;
struct kmem_cache *kmem_cache;
void *objects[KVM_NR_MEM_OBJS];
};
static inline void *mmu_memory_cache_alloc_obj(struct kvm_mmu_memory_cache *mc,
gfp_t gfp_flags)
{
+ gfp_flags |= mc->gfp_zero;
+
if (mc->kmem_cache)
- return kmem_cache_zalloc(mc->kmem_cache, gfp_flags);
+ return kmem_cache_alloc(mc->kmem_cache, gfp_flags);
else
return (void *)__get_free_page(gfp_flags);
}
int ret;
vcpu->arch.mmu_pte_list_desc_cache.kmem_cache = pte_list_desc_cache;
+ vcpu->arch.mmu_pte_list_desc_cache.gfp_zero = __GFP_ZERO;
+
vcpu->arch.mmu_page_header_cache.kmem_cache = mmu_page_header_cache;
+ vcpu->arch.mmu_page_header_cache.gfp_zero = __GFP_ZERO;
vcpu->arch.mmu = &vcpu->arch.root_mmu;
vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;