Messages in this thread | | | Date | Wed, 22 Apr 2015 11:35:43 +0200 | From | Radim Krčmář <> | Subject | Re: [PATCH] KVM: x86: tweak types of fields in kvm_lapic_irq |
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2015-04-21 19:01+0200, Paolo Bonzini: > Change to u16 if they only contain data in the low 16 bits. > > Change the level field to bool, since we assign 1 sometimes, but > just mask icr_low with APIC_INT_ASSERT in apic_send_ipi.
Would be more consistent to change that assignment instead ... If we dropped the idea that struct kvm_lapic_irq fields can be bitORed to get the ICR, we could also easily change trig_mode/dest_mode to bool level_trig/logical_dest. (I can do a followup patch.)
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > arch/x86/include/asm/kvm_host.h | 8 ++++---- > arch/x86/kvm/lapic.c | 2 +- > 2 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index 3a19e30f0be0..dc83b43d0850 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -689,10 +689,10 @@ struct msr_data { > > struct kvm_lapic_irq { > u32 vector;
Vector can be u8.
> - u32 delivery_mode; > - u32 dest_mode; > - u32 level; > - u32 trig_mode; > + u16 delivery_mode; > + u16 dest_mode; > + bool level; > + u16 trig_mode;
I'd prefer to have the u8 vector as well, but it works, Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
> u32 shorthand; > u32 dest_id; > }; > diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c > index abf165330881..ba585d0c42c5 100644 > --- a/arch/x86/kvm/lapic.c > +++ b/arch/x86/kvm/lapic.c > @@ -914,7 +914,7 @@ static void apic_send_ipi(struct kvm_lapic *apic) > irq.vector = icr_low & APIC_VECTOR_MASK; > irq.delivery_mode = icr_low & APIC_MODE_MASK; > irq.dest_mode = icr_low & APIC_DEST_MASK; > - irq.level = icr_low & APIC_INT_ASSERT; > + irq.level = (icr_low & APIC_INT_ASSERT) != 0; > irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; > irq.shorthand = icr_low & APIC_SHORT_MASK; > if (apic_x2apic_mode(apic)) > -- > 1.8.3.1 >
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