[PATCH v2] ARM/arm64: KVM: fix use of WnR bit in kvm_is_write_fault()

[Marc Zyngier]

On 11/09/14 04:12, Christoffer Dall wrote:
> On Tue, Sep 09, 2014 at 12:02:59PM +0100, Marc Zyngier wrote:
>> [resending, as ARM email server seems to be in some mood]
>>
>> On 09/09/14 11:27, Ard Biesheuvel wrote:
>>> The ISS encoding for an exception from a Data Abort has a WnR
>>> bit[6] that indicates whether the Data Abort was caused by a
>>> read or a write instruction. While there are several fields
>>> in the encoding that are only valid if the ISV bit[24] is set,
>>> WnR is not one of them, so we can read it unconditionally.
>>>
>>> Instead of fixing both implementations of kvm_is_write_fault()
>>> in place, reimplement it just once using kvm_vcpu_dabt_iswrite(),
>>> which already does the right thing with respect to the WnR bit.
>>> Also fix up the callers to pass 'vcpu'
>>>
>>> Acked-by: Laszlo Ersek <lersek at redhat.com>
>>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
>>
>> Because I like that kind of diffstat:
>> Acked-by: Marc Zyngier <marc.zyngier at arm.com>
>>
>> Christoffer, if you too are happy with that, I'll queue it right away.
>>
> Extremely happy:
> 
> Acked-by: Christoffer Dall <christoffer.dall at linaro.org>

Added to kvmarm/queue.

Thanks,

	M.
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