On 12/3/2015 11:24 AM, Marc Zyngier wrote: > On 03/12/15 19:21, Mario Smarduch wrote: >> >> >> On 12/3/2015 7:46 AM, Marc Zyngier wrote: >>> On 14/11/15 22:12, Mario Smarduch wrote: >>>> This patch adds vcpu fields to track lazy state, save host FPEXC, and >>>> offsets to fields. >>>> >>>> Signed-off-by: Mario Smarduch <m.smarduch@xxxxxxxxxxx> >>>> --- >>>> arch/arm/include/asm/kvm_host.h | 6 ++++++ >>>> arch/arm/kernel/asm-offsets.c | 2 ++ >>>> 2 files changed, 8 insertions(+) >>>> >>>> diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h >>>> index 3df1e97..f1bf551 100644 >>>> --- a/arch/arm/include/asm/kvm_host.h >>>> +++ b/arch/arm/include/asm/kvm_host.h >>>> @@ -107,6 +107,12 @@ struct kvm_vcpu_arch { >>>> /* Interrupt related fields */ >>>> u32 irq_lines; /* IRQ and FIQ levels */ >>>> >>>> + /* fp/simd dirty flag true if guest accessed register file */ >>>> + bool vfp_dirty; >>> >>> I think we do not need this bool, because it is already represented by >>> the state of the trapping bits. >> >> The trapping bit state is lost on exit since they're cleared, no? > > But that's what should actually be preserved, no? At the moment, you > maintain some side state to reflect what the trapping state is. You > might as well keep it around all the time. Ok I see, you should be able to preserve and use the trap registers. I'll rework it. > > Thanks, > > M. > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html