Re: [PATCH 0/4 V3] irqchip: gic: Introduce ARM GICv2m MSI(-X) support

[Suravee Suthikulanit]

On 7/17/2014 8:55 AM, Mark Rutland wrote:
> Hi Jason,
>
> On Thu, Jul 17, 2014 at 02:18:54PM +0100, Jason Cooper wrote:
> > On Wed, Jul 09, 2014 at 06:05:00PM -0500, suravee.suthikulpanit@xxxxxxx wrote:
> > > From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> > >
> > > This patch set introduces support for MSI(-X) in GICv2m specification,
> > > which is implemented in some variation of GIC400.
> > >
> > > This depends on and has been tested with the V7 of"Add support for PCI in AArch64"
> > > (https://lkml.org/lkml/2014/3/14/320).
> > >
> > > Changes in V3:
> > >      * Rebase to git://git.infradead.org/users/jcooper/linux.git irqchip/gic
> > >        (per Jason Cooper request)
> > >      * Misc fix/clean up per Mark Rutland comments
> > >      * Minor Clean up in the driver/irqchip/irq-gic-v2m.c: alloc_msi_irqs()
> > >      * Patch 4 is new to the series:
> > >          * Add ARM64-specific version arch_setup_msi_irqs() to allow support
> > >            for Multiple MSI.
> > >          * Add support for Multiple MSI for GICv2m.
> > >
> > > Suravee Suthikulpanit (4):
> > >    irqchip: gic: Add binding probe for ARM GIC400
> > >    irqchip: gic: Restructuring ARM GIC code
> > >    irqchip: gic: Add supports for ARM GICv2m MSI(-X)
> > >    irqchip: gicv2m: Add support for multiple MSI for ARM64 GICv2m
> >
> > Ok, patch #1 applied to irqchip/urgent.  Patches 2 and 3 applied to
> > irqchip/gic with irqchip/urgent merged in.  To facilitate
> > testing/merging, I've prepared an unsigned tag for you on the
> > irqchip/gic branch:
>
> I'm a little concerned that this is all going through for v3.17 without
> a {Reviewed,Acked}-by from Marc or anyone working with GIC{,v2m}.

> While his comments on v1 have been addressed, he has not had a chance to
> acknowledge the solutions. I appreciate Marc's holiday is unfortunately
> timed.
>
> I also have an open concern with the binding with regard to the
> orthogonality of GICV GICH and the MSI registers.

The MSI part is normally enabled from the optional "msi-controller" 
keyword. It should not really matter which compatible ID it uses.

Ooops. I noticed that was accidentally dropped the check for 
"msi-controller" in the gicv2m_of_init() function.  I'll send a follow 
up patch to fix this.

> Suravee, do you need this urgently for v3.17? I was under the impression
> that we wouldn't have full PCIe support by then.

PCI is the dependency for this patch to function.  So, it should be 
aligned with upstreaming of PCI patches.

Suravee

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/