linux-kernel - Re: [PATCH 2/3] ARM: msm: Re-organize platsmp to make it extensible

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] [day] [month] [year] [list]

Message-ID: <51AE6FA0.4030104@codeaurora.org>
Date:	Tue, 04 Jun 2013 15:52:16 -0700
From:	Rohit Vaswani <rvaswani@...eaurora.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 2/3] ARM: msm: Re-organize platsmp to make it extensible

On 6/4/2013 2:32 AM, Russell King - ARM Linux wrote:
> On Mon, Jun 03, 2013 at 05:19:44PM -0700, Rohit Vaswani wrote:
>> +	sc1_base_ptr = of_iomap(dn, 0);
>> +	if (sc1_base_ptr) {
>> +		writel_relaxed(0, sc1_base_ptr + VDD_SC1_ARRAY_CLAMP_GFS_CTL);
>> +		writel_relaxed(0, sc1_base_ptr + SCSS_CPU1CORE_RESET);
>> +		writel_relaxed(3, sc1_base_ptr + SCSS_DBG_STATUS_CORE_PWRDUP);
>> +		mb();
>> +		iounmap(sc1_base_ptr);
> If you need to fiddle with power rails and resets for your secondary
> core, you don't need any of the pen_release stuff, and you really
> should get rid of it.  The pen_release stuff is only there for
> platforms where there's no proper way of controlling the secondary
> CPUs except by using a software method.

We currently don't have hotplug support as that also needs pen_release. 
We still need to do this.
We could change that behavior, but we would need more time for that. 
Please could we let this go through and cleanup the pen_release once we 
have hotplug working.

Thanks,
Rohit Vaswani

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/