Re: [PATCH] arm64: dts: Fix GIC reg sizes for APM X-Gene

[Pranavkumar Sawargaonkar <psawargaonkar@apm.com>]

Hi,

On Tue, Jan 27, 2015 at 3:02 PM, Jon Masters <jcm@redhat.com> wrote:
> On 01/27/2015 02:03 AM, Pranavkumar Sawargaonkar wrote:
>> In APM X-Gene, GIC register space is 64K aligned while the sizes mentioned
>> in the dt are 4K aligned. This breaks KVM when kernel is built with 64K page
>> size due to size alignment checking in vgic driver for VCPU Control and
>> VCPU register.
>>
>> This patch corrects the sizes to be inline with the hardware spec.
>>
>> CC: linux-arm-kernel@lists.infradead.org
>> CC: kvmarm@lists.cs.columbia.edu
>> CC: arnd@arndb.de
>> CC: marc.zyngier@arm.com
>> CC: christoffer.dall@linaro.org
>> CC: jcm@redhat.com
>> Signed-off-by: Pranavkumar Sawargaonkar <psawargaonkar@apm.com>
>> Signed-off-by: Tushar Jagad <tjagad@apm.com>
>> Signed-off-by: Feng Kan <fkan@apm.com>
>> ---
>>  arch/arm64/boot/dts/apm/apm-storm.dtsi |    8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi
>> index f1ad9c2..65f0e6d 100644
>> --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi
>> +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi
>> @@ -81,10 +81,10 @@
>>               compatible = "arm,cortex-a15-gic";
>>               #interrupt-cells = <3>;
>>               interrupt-controller;
>> -             reg = <0x0 0x78010000 0x0 0x1000>,      /* GIC Dist */
>> -                   <0x0 0x78020000 0x0 0x1000>,      /* GIC CPU */
>> -                   <0x0 0x78040000 0x0 0x2000>,      /* GIC VCPU Control */
>> -                   <0x0 0x78060000 0x0 0x2000>;      /* GIC VCPU */
>> +             reg = <0x0 0x78010000 0x0 0x10000>,     /* GIC Dist */
>> +                   <0x0 0x78020000 0x0 0x20000>,     /* GIC CPU */
>> +                   <0x0 0x78040000 0x0 0x10000>,     /* GIC VCPU Control */
>> +                   <0x0 0x78060000 0x0 0x20000>;     /* GIC VCPU */
>>               interrupts = <1 9 0xf04>;       /* GIC Maintenence IRQ */
>>       };

Any comments on this patch ?

>
> Thanks. I confirm that we have tested this.
>
> Jon.
>
>

Thanks,
Pranav