linux-kernel - Re: [PATCH v2 2/6] KVM: x86: decouple irqchip_in_kernel() and pic

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Message-ID: <20170110050958.GI4135@pxdev.xzpeter.org>
Date:   Tue, 10 Jan 2017 13:09:58 +0800
From:   Peter Xu <peterx@...hat.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Radim Krčmář <rkrcmar@...hat.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v2 2/6] KVM: x86: decouple irqchip_in_kernel() and
 pic_irqchip()

On Tue, Jan 03, 2017 at 01:56:23PM +0100, David Hildenbrand wrote:
> Am 16.12.2016 um 16:10 schrieb Radim Krčmář:
> >irqchip_in_kernel() tried to save a bit by reusing pic_irqchip(), but it
> >just complicated the code.
> >Add a separate state for the irqchip mode.
> >
> >Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
> >---
> > v2: change two bools into one enum and rename everything [Paolo]
> >---
> > arch/x86/include/asm/kvm_host.h |  8 +++++++-
> > arch/x86/kvm/irq.h              | 15 ++++++++-------
> > arch/x86/kvm/x86.c              |  5 +++--
> > 3 files changed, 18 insertions(+), 10 deletions(-)
> >
> >diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> >index 7892530cbacf..d3acd295446d 100644
> >--- a/arch/x86/include/asm/kvm_host.h
> >+++ b/arch/x86/include/asm/kvm_host.h
> >@@ -715,6 +715,12 @@ struct kvm_hv {
> > 	HV_REFERENCE_TSC_PAGE tsc_ref;
> > };
> >
> >+enum kvm_irqchip_mode {
> >+	KVM_IRQCHIP_NONE,
> >+	KVM_IRQCHIP_KERNEL,       /* created with KVM_CREATE_IRQCHIP */
> >+	KVM_IRQCHIP_SPLIT,        /* created with KVM_CAP_SPLIT_IRQCHIP */
> 
> Was wondering if FULL/SPLIT would be a better naming. However I also
> find irqchip_kernel() vs irqchip_in_kernel() slightly confusing.

Me too. Since we have kvm_irqchip_mode enum above, how about renaming
irqchip_{kernel|split}() into irqchip_mode_{kernel|split}()?

Sorry for such a late comment...

-- peterx