• Sean Christopherson's avatar
    KVM: arm64: Use common code's approach for __GFP_ZERO with memory caches · e539451b
    Sean Christopherson authored
    Add a "gfp_zero" member to arm64's 'struct kvm_mmu_memory_cache' to make
    the struct and its usage compatible with the common 'struct
    kvm_mmu_memory_cache' in linux/kvm_host.h.  This will minimize code
    churn when arm64 moves to the common implementation in a future patch, at
    the cost of temporarily having somewhat silly code.
    
    Note, GFP_PGTABLE_USER is equivalent to GFP_KERNEL_ACCOUNT | GFP_ZERO:
    
      #define GFP_PGTABLE_USER  (GFP_PGTABLE_KERNEL | __GFP_ACCOUNT)
      |
      -> #define GFP_PGTABLE_KERNEL        (GFP_KERNEL | __GFP_ZERO)
    
      == GFP_KERNEL | __GFP_ACCOUNT | __GFP_ZERO
    
    versus
    
      #define GFP_KERNEL_ACCOUNT (GFP_KERNEL | __GFP_ACCOUNT)
    
        with __GFP_ZERO explicitly OR'd in
    
      == GFP_KERNEL | __GFP_ACCOUNT | __GFP_ZERO
    
    No functional change intended.
    Tested-by: default avatarMarc Zyngier <maz@kernel.org>
    Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
    Message-Id: <20200703023545.8771-18-sean.j.christopherson@intel.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    e539451b
kvm_host.h 19.9 KB