RE: [RFC PATCH v9 7/8] ptp: arm64: Enable ptp_kvm for arm64

[Jianyong Wu]

Hi Marc,

> -----Original Message-----
> From: Marc Zyngier <maz@xxxxxxxxxx>
> Sent: Thursday, January 9, 2020 5:46 PM
> To: Jianyong Wu <Jianyong.Wu@xxxxxxx>
> Cc: netdev@xxxxxxxxxxxxxxx; yangbo.lu@xxxxxxx; john.stultz@xxxxxxxxxx;
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> richardcochran@xxxxxxxxx; Mark Rutland <Mark.Rutland@xxxxxxx>;
> will@xxxxxxxxxx; Suzuki Poulose <Suzuki.Poulose@xxxxxxx>; Steven Price
> <Steven.Price@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx; kvmarm@xxxxxxxxxxxxxxxxxxxxx;
> kvm@xxxxxxxxxxxxxxx; Steve Capper <Steve.Capper@xxxxxxx>; Kaly Xin
> <Kaly.Xin@xxxxxxx>; Justin He <Justin.He@xxxxxxx>; nd <nd@xxxxxxx>;
> kvm-owner@xxxxxxxxxxxxxxx
> Subject: Re: [RFC PATCH v9 7/8] ptp: arm64: Enable ptp_kvm for arm64
> 
> On 2020-01-09 09:24, Marc Zyngier wrote:
> > On 2020-01-09 05:59, Jianyong Wu wrote:
> 
> [...]
> 
> >> So we focus it on arm64. Also I have never tested it on arm32 machine
> >> ( we lack of arm32 machine)
> >
> > I'm sure your employer can provide you with such a box. I can probably
> > even tell you which cupboard they are stored in... ;-)
> >
> >> Do you think it's necessary to enable ptp_kvm on arm32? If so, I can
> >> do that.
> >
> > I can't see why we wouldn't, given that it should be a zero effort
> > task (none of the code here is arch specific).
> 
> To be clear, what I'm after is support for 32bit *guests*. I don't expect any
> issue with a 32bit host (it's all common code), but you should be able to test
> 32bit guests pretty easily (most ARMv8.0 CPUs support 32bit EL1).
> 
Get it

Thanks
Jianyong 

>          M.
> --
> Jazz is not dead. It just smells funny...