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From: Shlomo Pongratz <shlomo.pongratz@huawei.com>
Date: Wed, 13 May 2015 10:34:31 +0000
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Subject: Re: [Qemu-devel] [PATCH v2] Add virt-v3 machine that uses GIC-500
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To: Pavel Fedin <p.fedin@samsung.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

> -----Original Message-----
> From: Pavel Fedin [mailto:p.fedin@samsung.com]
> Sent: Tuesday, 12 May, 2015 3:33 PM
> To: Shlomo Pongratz; qemu-devel@nongnu.org
> Subject: RE: [PATCH v2] Add virt-v3 machine that uses GIC-500
>=20
>  Hello!
>=20
> > BTW did you try going beyond 16 cores I had problems with 32 and 64 cor=
es.
>=20
>  Just tried it. Works fine, except qemu takes incredibly long time to sta=
rt up
> with so many cores. 64 cores took something like 2 minutes. Indeed, looks
> like freeze, but if you're patient enough, you'll see it running. I belie=
ve it's
> interpretation mode flaw.
>=20
> Kind regards,
> Pavel Fedin
> Expert Engineer
> Samsung Electronics Research center Russia
>=20


Hi Pavel,

With your patch I can work up to 16 cores it gets stuck at 24 cores.

I have two questions regarding your changes.
1. In fdt_add_timer why you didn't used the 24 bit limit I posed on the irq=
flags? Please note that the argument is 32 bits wide an 8 bits are for flag=
s.
2. In machvirt_init, I used TYPE_AARCH64_CPU while you reverted it to TYPE_=
ARM_CPU, I assume this is because you want to support cortex-a15. Don't you=
 think It should be according to the cortex type? (BTW you removed cortex-a=
53).

Best regards,

S.P.