ARM: KVM: abstract SAS decoding away

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>

1 files changed, 3 insertions, 14 deletions

diff --git a/arch/arm/kvm/mmio.c b/arch/arm/kvm/mmio.c
index 6495c1ca7bfa..0b8f49985b70 100644
--- a/arch/arm/kvm/mmio.c
+++ b/arch/arm/kvm/mmio.c
@@ -77,20 +77,9 @@ static int decode_hsr(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
                 return 1;
         }
 
-        switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
-        case 0:
-                len = 1;
-                break;
-        case 1:
-                len = 2;
-                break;
-        case 2:
-                len = 4;
-                break;
-        default:
-                kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
-                return -EFAULT;
-        }
+        len = kvm_vcpu_dabt_get_as(vcpu);
+        if (unlikely(len < 0))
+                return len;
 
         is_write = kvm_vcpu_dabt_iswrite(vcpu);
         sign_extend = kvm_vcpu_dabt_issext(vcpu);