From: "Alex Bennée" <alex.bennee@linaro.org>
To: Christoffer Dall <cdall@kernel.org>,
Peter Maydell <peter.maydell@linaro.org>,
shashi.mallela@linaro.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Marc Zyngier <maz@kernel.org>
Cc: Arnd Bergmann <arnd.bergmann@linaro.org>,
kvmarm@lists.cs.columbia.edu, stratos-dev@op-lists.linaro.org
Subject: Configuring the host GIC for guest to guest IPI
Date: Mon, 13 Dec 2021 11:40:41 +0000 [thread overview]
Message-ID: <87fsqwn2sd.fsf@linaro.org> (raw)
Hi GIC experts,
This came up last week in the Stratos sync call when we were discussing
Vincent's SCMI setup:
https://linaro.atlassian.net/wiki/spaces/STR/pages/28665741503/2021-12-09+Project+Stratos+Meeting+Notes
with the shared memory between the two guests the only reason we
currently exit to the guest userspace (QEMU) is to forward notifications
of virtqueue kicks from one guest to the other. I'm vaguely aware from
my time looking at GIC code that it can be configured for IPI IRQs
between two cores. Do we have that ability between two vCPUs from
different guests?
If not what would it take to enable such a feature?
--
Alex Bennée
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next reply other threads:[~2021-12-13 11:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 11:40 Alex Bennée [this message]
2021-12-13 12:10 ` Configuring the host GIC for guest to guest IPI Marc Zyngier
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