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From: Marc Zyngier <maz@kernel.org>
To: Jingyi Wang <wangjingyi11@huawei.com>
Cc: drjones@redhat.com, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, eric.auger@redhat.com,
	wanghaibin.wang@huawei.com, yuzenghui@huawei.com
Subject: Re: [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test
Date: Wed, 05 Aug 2020 13:13:36 +0100
Message-ID: <0bd81d1da9040fce660af46763507ac2@kernel.org> (raw)
In-Reply-To: <957a4657-7e17-b173-ea4d-10c29ab9e3cd@huawei.com>

On 2020-08-05 12:54, Jingyi Wang wrote:
> Hi all,
> 
> Currently, kvm-unit-tests only support GICv3 vLPI injection. May I ask
> is there any plan or suggestion on constructing irq bypass mechanism
> to test vLPI direct injection in kvm-unit-tests?

I'm not sure what you are asking for here. VLPIs are only delivered
from a HW device, and the offloading mechanism isn't visible from
userspace (you either have an enabled GICv4 implementation, or
you don't).

There are ways to *trigger* device MSIs from userspace and inject
them in a guest, but that's only a debug feature, which shouldn't
be enabled on a production system.

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

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  7:42 Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 01/10] arm64: microbench: get correct ipi received num Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 02/10] arm64: microbench: Generalize ipi test names Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 03/10] arm64: microbench: gic: Add ipi latency test for gicv4.1 support kvm Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 04/10] arm64: its: Handle its command queue wrapping Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 05/10] arm64: microbench: its: Add LPI latency test Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 06/10] arm64: microbench: Allow each test to specify its running times Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 07/10] arm64: microbench: Add time limit for each individual test Jingyi Wang
2020-08-01 16:13   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 08/10] arm64: microbench: Add vtimer latency test Jingyi Wang
2020-08-01 16:22   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 09/10] arm64: microbench: Add test->post() to further process test results Jingyi Wang
2020-08-01 17:03   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 10/10] arm64: microbench: Add timer_post() to get actual PPI latency Jingyi Wang
2020-07-31 12:01 ` [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test Andrew Jones
2020-08-03  2:15   ` Jingyi Wang
2020-08-01 17:40 ` Andrew Jones
2020-08-05 11:54 ` Jingyi Wang
2020-08-05 12:13   ` Marc Zyngier [this message]
2020-08-11  1:48     ` Jingyi Wang
2020-08-11  7:49       ` Marc Zyngier
2020-08-17  1:46         ` Jingyi Wang
2020-08-17  8:26           ` Marc Zyngier

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