linux-kernel - Re: [PATCH v4] ACPI / tables: Add IORT to injectable table list

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Date:   Thu, 08 Feb 2018 11:00:58 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Hanjun Guo <guohanjun@...wei.com>,
        Yang Shunyong <shunyong.yang@...-semitech.com>
Cc:     lenb@...nel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Joey Zheng <yu.zheng@...-semitech.com>,
        Wang Dongsheng <dongsheng.wang@...-semitech.com>,
        Jiang Yutang <yutang2.jiang@...-semitech.com>
Subject: Re: [PATCH v4] ACPI / tables: Add IORT to injectable table list

On Tuesday, February 6, 2018 8:18:02 AM CET Hanjun Guo wrote:
> On 2018/2/6 14:37, Yang Shunyong wrote:
> > Loading IORT table from initrd can be used to fix severe firmware
> > IORT defects temporarily before platform/BIOS vendor releases an
> > upgraded BIOS binary.
> > 
> > Moreover, it is very powerful to debug SMMU node/device probe, MSI
> > allocation, stream id translation and IORT table from firmware.
> > 
> > It is also very useful to enable SMMU and devices behind SMMU before
> > firmware is ready.
> > 
> > This patch adds ACPI_SIG_IORT to the table, which enables IORT
> > from initrd to override which from firmware.
> > 
> > Cc: Joey Zheng <yu.zheng@...-semitech.com>
> > Cc: Wang Dongsheng <dongsheng.wang@...-semitech.com>
> > Cc: Jiang Yutang <yutang2.jiang@...-semitech.com>
> > Cc: Hanjun Guo <guohanjun@...wei.com>
> > Signed-off-by: Yang Shunyong <shunyong.yang@...-semitech.com>
> 
> Acked-by: Hanjun Guo <hanjun.guo@...aro.org>

Patch applied, thanks!