linux-kernel - Re: [PATCH 0/2] irqchip/gic-v3-its: Use CMA for its table allocation

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: <20181128144712.GI4262@rric.localdomain>
Date:   Wed, 28 Nov 2018 14:47:19 +0000
From:   "Richter, Robert" <Robert.Richter@...ium.com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
CC:     Will Deacon <will.deacon@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Julien Thierry <julien.thierry@....com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
        John Garry <john.garry@...wei.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] irqchip/gic-v3-its: Use CMA for its table allocation

On 15.11.18 22:50:57, Richter, Robert wrote:
> The gicv3-its device table may have a size of up to 16MB (Cavium
> ThunderX). With 4k pagesize the maximum size of memory allocation is
> 4MB. This series implements the use of CMA for allocation of large its
> tables. To achieve this we need to make an its node a kernel device
> (patch #1) and rework the its table allocation code (patch #2). Both
> can only be done after the arch_initcall and thus this patch series
> bases on my previous series that implements late its initialization:
> 
>       https://patchwork.kernel.org/cover/10673117/

I just sent out v2 of that series:

 https://patchwork.kernel.org/cover/10702781/

This series should be still compatible.

Any comments to this series?

Thanks,

-Robert

> 
> Using its nodes as kernel devices has the side effect to ease the
> release of resources (devres used) and device based messages (dev_*
> printk variants used).
> 
> The new its table allocator still uses the old scheme for small tables
> to allow a further rework that supports NUMA-aware its tables.
> 
> Robert Richter (2):
>   irqchip/gic-v3-its: Handle its nodes as kernel devices
>   irqchip/gic-v3-its: Use CMA for allocation of large device tables
> 
>  drivers/irqchip/irq-gic-v3-its.c | 224 +++++++++++++++++++++++----------------
>  1 file changed, 135 insertions(+), 89 deletions(-)
> 
> -- 
> 2.11.0
>