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Subject: Re: [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use
 fixmap
To: James Morse <james.morse@arm.com>, <linux-acpi@vger.kernel.org>
References: <20171031153832.17746-1-james.morse@arm.com>
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From: Zhengqiang <zhengqiang10@huawei.com>
Message-ID: <5A04489D.2040201@huawei.com>
Date: Thu, 9 Nov 2017 20:22:53 +0800
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On 2017/10/31 23:38, James Morse wrote:
> GHES is doing ioremap_page_range() in both NMI and irq context, neither
> are safe as it may sleep to allocate intermediate levels of page table.
> 
> Replace the NMI/irq GHES_IOREMAP_PAGES to use a fixmap entry each.
> 
> After this nothing uses ghes_ioremap_area or arch_apei_flush_tlb_one(),
> rip them out.
> 
> RFC as I've only build-tested this on x86. For arm64 I've tested it on a
> software model. Any more testing would be welcome. These patches are based
> on rc7.
> 


Tested-by:  Qiang Zheng <zhengqiang10@huawei.com>

Verified on our arm64, it work for me. Thanks.

Qiang