linux-kernel - Re: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption

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]

Date:	Thu, 25 Sep 2008 07:16:45 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Milton Miller <miltonm@....com>
Cc:	Sebastien Dugue <sebastien.dugue@...l.net>,
	Paul Mackerras <paulus@...ba.org>,
	linux-kernel@...r.kernel.org, Christoph Raisch <RAISCH@...ibm.com>,
	linuxppc-dev@...abs.org, Jan-Bernd Themann <ossthema@...ibm.com>
Subject: Re: [PATCH HACK] powerpc: quick hack to get a functional eHEA with
	hardirq preemption

On Wed, 2008-09-24 at 11:42 -0500, Milton Miller wrote:
> 
> I was trying to understand why the mask and early eoi, but I guess its 
> to handle other more limited interrupt controllers where the interrupts 
> stack in hardware instead of software.

No Milton, we must do it that way, because the EOI must be done on the
right CPU even on XICS, or we won't get the CPU priority back properly.

Ben.

--
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/