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Date: Thu, 9 Nov 2017 20:22:53 +0800 From: Zhengqiang <zhengqiang10@...wei.com> To: James Morse <james.morse@....com>, <linux-acpi@...r.kernel.org> CC: "Rafael J . Wysocki" <rjw@...ysocki.net>, Tony Luck <tony.luck@...el.com>, Xie XiuQi <xiexiuqi@...wei.com>, Tyler Baicar <tbaicar@...eaurora.org>, Catalin Marinas <catalin.marinas@....com>, <x86@...nel.org>, Will Deacon <will.deacon@....com>, <linux-kernel@...r.kernel.org>, Dongjiu Geng <gengdongjiu@...wei.com>, Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...e.de>, <torvalds@...ux-foundation.org>, <linux-arm-kernel@...ts.infradead.org>, Len Brown <lenb@...nel.org> Subject: Re: [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use fixmap 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@...wei.com> Verified on our arm64, it work for me. Thanks. Qiang
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