[PATCH v2 05/10] KVM: arm: introduce kvm_arch_setup/clear_debug()

[Alex Bennée]

Andrew Jones <drjones at redhat.com> writes:

> On Wed, Apr 01, 2015 at 06:28:55PM +0200, David Hildenbrand wrote:
>> > This is a precursor for later patches which will need to do more to
>> > setup debug state before entering the hyp.S switch code. The existing
>> > functionality for setting mdcr_el2 has been moved out of hyp.S and now
>> > uses the value kept in vcpu->arch.mdcr_el2.
>> > 
>> > This also moves the conditional setting of the TDA bit from the hyp code
>> > into the C code.
>> > 
>> > Signed-off-by: Alex Bennée <alex.bennee at linaro.org>
>> > 
>> >  create mode 100644 arch/arm64/kvm/debug.c
>> > 
>> > diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
>> > index 41008cd..8c01c97 100644
>> > --- a/arch/arm/include/asm/kvm_host.h
>> > +++ b/arch/arm/include/asm/kvm_host.h
>> > @@ -242,5 +242,7 @@ static inline void kvm_arch_hardware_unsetup(void) {}
>> >  static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>> >  static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
>> >  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>> > +static inline void kvm_arch_setup_debug(struct kvm_vcpu *vcpu) {}
>> > +static inline void kvm_arch_clear_debug(struct kvm_vcpu *vcpu) {}
>> 
>> Do you really want to call these functions "kvm_arch.." although they are not
>> defined for other arch and not triggered by common code?
>>
>
> Agreed. If other arches want something similar we can rename/refactor
> later. If these are arm-only functions, then we don't need the generic
> prefix, which is actually even a bit confusing.

They are arm only but I was keeping in mind the need to add guest debug
to ARMv7 at some point.

>
> drew 

-- 
Alex Bennée