On Mon, Apr 08, 2013 at 05:17:26PM +0100, Marc Zyngier wrote:
> static inline bool kvm_vcpu_reg_is_pc(const struct kvm_vcpu *vcpu, int reg)
> {
> - return false;
> + return (vcpu_mode_is_32bit(vcpu)) && reg == 15;
> }
On AArch64, would ESR_EL2 have SRT == 15 when the source/destination
register is PC? The mapping between AArch32 and AArch64 registers
suggests R13_hyp. Maybe 15 is correct but it's not clear to me from the
spec.
BTW, on arch/arm it looks like this is used when you get a data abort
with PC as the destination register and you inject a prefetch abort in
this case. Why isn't this a normal data abort? Once you get the
information, you load it into PC but first you need to sort out the data
abort (unless I don't understand how the kvm_inject_pabt works).
--
Catalin
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