From: Marc Zyngier <maz@kernel.org>
To: Yejune Deng <yejune.deng@gmail.com>
Cc: james.morse@arm.com, julien.thierry.kdev@gmail.com,
suzuki.poulose@arm.com, catalin.marinas@arm.com, will@kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] KVM: arm64: Add big.LITTLE architecture support for vcpu
Date: Fri, 05 Mar 2021 12:02:20 +0000 [thread overview]
Message-ID: <87h7lpzu43.wl-maz@kernel.org> (raw)
In-Reply-To: <20210305103425.73380-1-yejune.deng@gmail.com>
On Fri, 05 Mar 2021 10:34:25 +0000,
Yejune Deng <yejune.deng@gmail.com> wrote:
>
> In big.LITTLE architecture,the application layer calls KVM_ARM_VCPU_INIT
> several times.Sometimes the thread will run on the big core, sometimes
> will run on the little core.The big core and the little core has always
> different cpuid, but the init target is fixed. and that leads to
> init->target != phys_target. So modify phys target from the current core
> to all cpu online.
This is done on purpose, and it is userspace's responsibility to pin
its vcpu threads to a certain type of CPUs if it cares at all.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
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prev parent reply other threads:[~2021-03-05 12:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 10:34 [PATCH] KVM: arm64: Add big.LITTLE architecture support for vcpu Yejune Deng
2021-03-05 12:02 ` Marc Zyngier [this message]
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