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Wed, 28 Jul 2021 06:11:07 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8cmV-00HEF6-6s for linux-arm-kernel@lists.infradead.org; Wed, 28 Jul 2021 06:11:04 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 42BC660295; Wed, 28 Jul 2021 06:11:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1627452662; bh=fcM+N8t5rWhUOVkUfGpA9xFKuYSy4o3D2WgRulV7BPE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Jz6AZ8JnzMPXMv4vbMVVLRdGCGEh3ZMUEUpDqB0elqrVscVWGa9CLliWcq/A3NoyN Bw7LAquNoDZ77bRpuKH6anO6QoNqMRPBCTHSKN3bYizHz4350z2lI9Uy6scPPKPWno D3mgIF97HQ8xk2tmG3eWfCdWOFCsMxykDPXjE2tA= Date: Wed, 28 Jul 2021 08:11:00 +0200 From: Greg Kroah-Hartman To: Peter Collingbourne Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Evgenii Stepanov , Szabolcs Nagy , Tejas Belagod , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v11 5/5] Documentation: document the preferred tag checking mode feature Message-ID: References: <20210727205300.2554659-1-pcc@google.com> <20210727205300.2554659-6-pcc@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210727205300.2554659-6-pcc@google.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210727_231103_314732_F111527B X-CRM114-Status: GOOD ( 17.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jul 27, 2021 at 01:52:59PM -0700, Peter Collingbourne wrote: > Document the functionality added in the previous patches. > > Link: https://linux-review.googlesource.com/id/I48217cc3e8b8da33abc08cbaddc11cf4360a1b86 > Signed-off-by: Peter Collingbourne > Reviewed-by: Catalin Marinas > Acked-by: Will Deacon > --- > v10: > - document that setting the sysfs node may not take effect > immediately > - unabbreviate month name > > v9: > - add documentation for sysfs node under Documentation/ABI > > .../ABI/testing/sysfs-devices-system-cpu | 18 +++++++ > .../arm64/memory-tagging-extension.rst | 48 ++++++++++++++++--- > 2 files changed, 59 insertions(+), 7 deletions(-) > > diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu > index 160b10c029c0..5f87b146deb9 100644 > --- a/Documentation/ABI/testing/sysfs-devices-system-cpu > +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu > @@ -640,3 +640,21 @@ Description: SPURR ticks for cpuX when it was idle. > > This sysfs interface exposes the number of SPURR ticks > for cpuX when it was idle. > + > +What: /sys/devices/system/cpu/cpuX/mte_tcf_preferred > +Date: July 2021 > +Contact: Linux ARM Kernel Mailing list > +Description: Preferred MTE tag checking mode > + > + When a user program specifies more than one MTE tag checking > + mode, this sysfs node is used to specify which mode should > + be preferred when running on that CPU. Possible values: > + > + ================ ============================================== > + "sync" Prefer synchronous mode > + "async" Prefer asynchronous mode > + ================ ============================================== > + > + Changes to this sysfs node may not take effect immediately. Ok, so when do they take effect? A hint would be nice :) thanks, greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel