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ARM: KVM: abstract (and fix) external abort detection away 

Bit 8 is cache maintenance, bit 9 is external abort.

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 11:36:16 +01:00 committed by Christoffer Dall
parent d0adf747c9
commit 78abfcde49
3 changed files with 9 additions and 1 deletions
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3
arch/arm/include/asm/kvm_arm.h
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@ -211,4 +211,7 @@
#define HSR_HVC_IMM_MASK ((1UL << 16) - 1)
#define HSR_DABT_CM (1U << 8)
#define HSR_DABT_EA (1U << 9)
#endif /* __ARM_KVM_ARM_H__ */

5
arch/arm/include/asm/kvm_emulate.h
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@ -110,4 +110,9 @@ static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
}
static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
{
return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
}
#endif /* __ARM_KVM_EMULATE_H__ */

2
arch/arm/kvm/mmio.c
View File

@ -65,7 +65,7 @@ static int decode_hsr(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
unsigned long rt, len;
bool is_write, sign_extend;
if ((kvm_vcpu_get_hsr(vcpu) >> 8) & 1) {
if (kvm_vcpu_dabt_isextabt(vcpu)) {
/* cache operation on I/O addr, tell guest unsupported */
kvm_inject_dabt(vcpu, kvm_vcpu_get_hfar(vcpu));
return 1;