On Thu, Nov 22, 2018 at 11:25:48AM +0000, Andrew Murray wrote: > In order to effeciently enable/disable guest/host only perf counters > at guest entry/exit we add bitfields to kvm_cpu_context for guest and > host only events as well as accessors for updating them. > > Signed-off-by: Andrew Murray <[email protected]> > --- > arch/arm64/include/asm/kvm_host.h | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_host.h > b/arch/arm64/include/asm/kvm_host.h > index 1550192..4a828eb 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -203,6 +203,8 @@ struct kvm_cpu_context { > }; > > struct kvm_vcpu *__hyp_running_vcpu; > + u32 events_host_only; > + u32 events_guest_only; > }; > > typedef struct kvm_cpu_context kvm_cpu_context_t; > @@ -472,6 +474,24 @@ static inline int kvm_arch_vcpu_run_pid_change(struct > kvm_vcpu *vcpu) > { > return kvm_arch_vcpu_run_map_fp(vcpu); > } > +static inline void kvm_clr_set_host_pmu_events(u32 clr, u32 set) > +{ > + kvm_cpu_context_t *ctx = this_cpu_ptr(&kvm_host_cpu_state); > + > + ctx->events_host_only &= ~clr; > + ctx->events_host_only |= set; > +}
Do you actually need this clr/set function, or can you just use the facilities provided by bitfield.h at the callsites? Will _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
