From: Will Deacon <will.deacon@arm.com>
To: James Morse <james.morse@arm.com>
Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Borislav Petkov <bp@suse.de>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>, Tony Luck <tony.luck@intel.com>,
Tyler Baicar <tbaicar@codeaurora.org>,
Dongjiu Geng <gengdongjiu@huawei.com>,
Xie XiuQi <xiexiuqi@huawei.com>,
torvalds@linux-foundation.org
Subject: Re: [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use fixmap
Date: Thu, 2 Nov 2017 10:19:33 +0000 [thread overview]
Message-ID: <20171102101933.GC11881@arm.com> (raw)
In-Reply-To: <20171031153832.17746-1-james.morse@arm.com>
On Tue, Oct 31, 2017 at 03:38:26PM +0000, 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.
>
> Thanks,
>
> James Morse (6):
> arm64: fixmap: Add GHES fixmap entries
> x86/mm/fixmap: Add GHES fixmap entries
> ACPI / APEI: Replace ioremap_page_range() with fixmap
> ACPI / APEI: Remove ghes_ioremap_area
> arm64: mm: Remove arch_apei_flush_tlb_one()
> ACPI / APEI: Remove arch_apei_flush_tlb_one()
>
> arch/arm64/include/asm/acpi.h | 12 ------
> arch/arm64/include/asm/fixmap.h | 5 +++
> arch/arm64/mm/mmu.c | 4 ++
If you need it:
Acked-by: Will Deacon <will.deacon@arm.com>
for the arm64 bits.
Will
next prev parent reply other threads:[~2017-11-02 10:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-31 15:38 [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use fixmap James Morse
2017-10-31 15:38 ` [RFC/RFT PATCH 1/6] arm64: fixmap: Add GHES fixmap entries James Morse
2017-10-31 15:38 ` [RFC/RFT PATCH 2/6] x86/mm/fixmap: " James Morse
2017-10-31 19:04 ` Ingo Molnar
2017-10-31 19:09 ` Borislav Petkov
2017-10-31 15:38 ` [RFC/RFT PATCH 3/6] ACPI / APEI: Replace ioremap_page_range() with fixmap James Morse
2017-11-01 4:13 ` gengdongjiu
2017-11-01 14:57 ` James Morse
2017-11-02 12:01 ` gengdongjiu
2017-11-06 18:41 ` James Morse
2017-11-01 13:34 ` Borislav Petkov
2017-10-31 15:38 ` [RFC/RFT PATCH 4/6] ACPI / APEI: Remove ghes_ioremap_area James Morse
2017-11-01 13:47 ` Borislav Petkov
2017-10-31 15:38 ` [RFC/RFT PATCH 5/6] arm64: mm: Remove arch_apei_flush_tlb_one() James Morse
2017-10-31 15:38 ` [RFC/RFT PATCH 6/6] ACPI / APEI: " James Morse
2017-11-01 13:50 ` Borislav Petkov
2017-10-31 15:52 ` [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use fixmap Linus Torvalds
2017-10-31 16:05 ` Linus Torvalds
2017-11-01 14:58 ` James Morse
2017-10-31 18:46 ` Tyler Baicar
2017-11-01 14:58 ` James Morse
2017-11-01 15:30 ` Borislav Petkov
2017-11-01 18:20 ` Kani, Toshimitsu
2017-11-06 18:43 ` James Morse
2017-11-02 10:19 ` Will Deacon [this message]
2017-11-09 12:22 ` Zhengqiang
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