linux-kernel - Re: [PATCH v7 07/10] arm64: define TIF_POLLING

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240903081040.GA12270@willie-the-truck>
Date: Tue, 3 Sep 2024 09:10:40 +0100
From: Will Deacon <will@...nel.org>
To: Ankur Arora <ankur.a.arora@...cle.com>
Cc: linux-pm@...r.kernel.org, kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	catalin.marinas@....com, tglx@...utronix.de, mingo@...hat.com,
	bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
	hpa@...or.com, pbonzini@...hat.com, wanpengli@...cent.com,
	vkuznets@...hat.com, rafael@...nel.org, daniel.lezcano@...aro.org,
	peterz@...radead.org, arnd@...db.de, lenb@...nel.org,
	mark.rutland@....com, harisokn@...zon.com, mtosatti@...hat.com,
	sudeep.holla@....com, cl@...two.org, misono.tomohiro@...itsu.com,
	maobibo@...ngson.cn, joao.m.martins@...cle.com,
	boris.ostrovsky@...cle.com, konrad.wilk@...cle.com
Subject: Re: [PATCH v7 07/10] arm64: define TIF_POLLING_NRFLAG

On Fri, Aug 30, 2024 at 03:28:41PM -0700, Ankur Arora wrote:
> From: Joao Martins <joao.m.martins@...cle.com>
> 
> Commit 842514849a61 ("arm64: Remove TIF_POLLING_NRFLAG") had removed
> TIF_POLLING_NRFLAG because arm64 only supported non-polled idling via
> cpu_do_idle().
> 
> To add support for polling via cpuidle-haltpoll, we want to use the
> standard poll_idle() interface, which sets TIF_POLLING_NRFLAG while
> polling.
> 
> Reuse the same bit to define TIF_POLLING_NRFLAG.
> 
> Signed-off-by: Joao Martins <joao.m.martins@...cle.com>
> Signed-off-by: Mihai Carabas <mihai.carabas@...cle.com>
> Reviewed-by: Christoph Lameter <cl@...ux.com>
> Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>
> ---
>  arch/arm64/include/asm/thread_info.h | 2 ++
>  1 file changed, 2 insertions(+)

Acked-by: Will Deacon <will@...nel.org>

Will