From: Jan Kiszka <jan.kiszka@siemens.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
RT <linux-rt-users@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: arm64: kvm + RT
Date: Tue, 5 Oct 2021 12:01:02 +0200 [thread overview]
Message-ID: <4653e6b3-e038-6350-d07b-496ba53bc80b@siemens.com> (raw)
In-Reply-To: <87h7dvg5mz.ffs@tglx>
On 05.10.21 11:52, Thomas Gleixner wrote:
> Jan,
>
> On Mon, Oct 04 2021 at 19:54, Jan Kiszka wrote:
>> what's the state of getting kvm working (again?) along RT? Seems
>> HAVE_POSIX_CPU_TIMERS_TASK_WORK is in conflict with KVM but a
>> precondition for RT on recent kernels. What's the story behind that?
>
> the ARM64 KVM implementation is incorrect vs. TIF handling before
> VMENTER which breaks the posix cpu timers task work assumptions and also
> violates a few other expectations. AFAICT the arm64 folks are working on
> that, but you have to ask them directly what the state of this is.
>
Thanks, then let's try this: Marc, what is the status of this?
Jan
--
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2021-10-05 10:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 17:54 arm64: kvm + RT Jan Kiszka
2021-10-05 9:52 ` Thomas Gleixner
2021-10-05 10:01 ` Jan Kiszka [this message]
2021-10-05 10:54 ` Mark Rutland
2021-10-06 0:05 ` Thomas Gleixner
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