Re: [PATCH 5/7] KVM: Extract generic irqchip logic into irqchip.c

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On 17.04.2013, at 13:50, Paolo Bonzini wrote:

> Il 16/04/2013 19:26, Alexander Graf ha scritto:
>> The current irq_comm.c file contains pieces of code that are generic
>> across different irqchip implementations, as well as code that is
>> fully IOAPIC specific.
>> 
>> Split the generic bits out into irqchip.c.
>> 
>> Signed-off-by: Alexander Graf <agraf@xxxxxxx>
>> ---
>> arch/x86/kvm/Makefile      |    2 +-
>> include/trace/events/kvm.h |   12 +++-
>> virt/kvm/irq_comm.c        |  117 ----------------------------------
>> virt/kvm/irqchip.c         |  152 ++++++++++++++++++++++++++++++++++++++++++++
>> 4 files changed, 163 insertions(+), 120 deletions(-)
>> create mode 100644 virt/kvm/irqchip.c
>> 
>> diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
>> index 04d3040..a797b8e 100644
>> --- a/arch/x86/kvm/Makefile
>> +++ b/arch/x86/kvm/Makefile
>> @@ -7,7 +7,7 @@ CFLAGS_vmx.o := -I.
>> 
>> kvm-y			+= $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
>> 				coalesced_mmio.o irq_comm.o eventfd.o \
>> -				assigned-dev.o)
>> +				assigned-dev.o irqchip.o)
>> kvm-$(CONFIG_IOMMU_API)	+= $(addprefix ../../../virt/kvm/, iommu.o)
>> kvm-$(CONFIG_KVM_ASYNC_PF)	+= $(addprefix ../../../virt/kvm/, async_pf.o)
>> 
>> diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
>> index 19911dd..2fe2d53 100644
>> --- a/include/trace/events/kvm.h
>> +++ b/include/trace/events/kvm.h
>> @@ -37,7 +37,7 @@ TRACE_EVENT(kvm_userspace_exit,
>> 		  __entry->errno < 0 ? -__entry->errno : __entry->reason)
>> );
>> 
>> -#if defined(__KVM_HAVE_IRQ_LINE)
>> +#if defined(__KVM_HAVE_IRQ_LINE) || defined(__KVM_HAVE_IRQCHIP)
> 
> I think it makes more sense to replace the #if altogether with
> __KVM_HAVE_IRQCHIP.  The only arches that have __KVM_HAVE_IRQ_LINE
> already have __KVM_HAVE_IOAPIC, so it is ok to do that.

I'm actually reworking this bit right now. Every time we use __KVM in non-uapi headers or C files we're basically doing something seriously wrong. KVM code should only depend on CONFIG_HAVE_KVM_....


Alex

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