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ARM: KVM: abstract SAS decoding away

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Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
This commit is contained in:
Marc Zyngier 2012-09-18 11:43:30 +01:00 committed by Christoffer Dall
parent b37670b0f3
commit a7123377e7
2 changed files with 19 additions and 14 deletions
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16
arch/arm/include/asm/kvm_emulate.h
View File

@ -120,4 +120,20 @@ static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
}
/* Get Access Size from a data abort */
static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
{
switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
case 0:
return 1;
case 1:
return 2;
case 2:
return 4;
default:
kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
return -EFAULT;
}
}
#endif /* __ARM_KVM_EMULATE_H__ */

17
arch/arm/kvm/mmio.c
View File

@ -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);