From: Zenghui Yu <yuzenghui@huawei.com>
To: Andrey Shinkevich <andrey.shinkevich@huawei.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Cc: "peter.maydell@linaro.org" <peter.maydell@linaro.org>,
"drjones@redhat.com" <drjones@redhat.com>,
shashi.mallela@linaro.org,
"richard.henderson@linaro.org" <richard.henderson@linaro.org>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"Chengen \(William, FixNet\)" <chengen@huawei.com>,
wanghaibin.wang@huawei.com
Subject: Re: GICv3 for MTTCG
Date: Wed, 12 May 2021 09:44:03 +0800 [thread overview]
Message-ID: <4aa792d6-96d5-45db-39eb-08885323a80e@huawei.com> (raw)
In-Reply-To: <1f157423cc544731beb743287a4be5cb@huawei.com>
[+Shashi]
On 2021/5/12 1:51, Andrey Shinkevich wrote:
> Dear colleagues,
>
> I am looking for ways to accelerate the MTTCG for ARM guest on x86-64 host.
> The maximum number of CPUs for MTTCG that uses GICv2 is limited by 8:
>
> include/hw/intc/arm_gic_common.h:#define GIC_NCPU 8
>
> The version 3 of the Generic Interrupt Controller (GICv3) is not
> supported in QEMU for some reason unknown to me. It would allow to
> increase the limit of CPUs and accelerate the MTTCG performance on a
> multiple core hypervisor.
> I have got an idea to implement the Interrupt Translation Service (ITS)
> for using by MTTCG for ARM architecture.
>
> Do you find that idea useful and feasible?
> If yes, how much time do you estimate for such a project to complete by
> one developer?
> If no, what are reasons for not implementing GICv3 for MTTCG in QEMU?
Are you looking for something like that [*]? I think it has been on the
list for a while.
[*] https://lists.gnu.org/archive/html/qemu-arm/2021-04/msg00944.html
Zenghui
next prev parent reply other threads:[~2021-05-12 1:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 17:51 GICv3 for MTTCG Andrey Shinkevich
2021-05-11 19:53 ` Richard Henderson
2021-05-12 1:44 ` Zenghui Yu [this message]
2021-05-12 15:26 ` Alex Bennée
2021-05-13 16:35 ` Andrey Shinkevich
2021-05-13 16:45 ` Shashi Mallela
2021-05-13 18:29 ` Andrey Shinkevich
2021-06-17 16:43 ` Andrey Shinkevich
2021-06-17 17:44 ` shashi.mallela
2021-06-17 18:55 ` Andrey Shinkevich
2021-06-18 13:15 ` Alex Bennée
2021-06-18 15:18 ` Andrey Shinkevich
2021-05-13 17:19 ` Alex Bennée
2021-05-13 18:33 ` Andrey Shinkevich
2021-05-14 5:21 ` Andrey Shinkevich
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