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Date: Wed, 1 Nov 2017 14:34:30 +0100 From: Borislav Petkov <bp@...e.de> To: James Morse <james.morse@....com> Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, x86@...nel.org, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>, "Rafael J . Wysocki" <rjw@...ysocki.net>, Len Brown <lenb@...nel.org>, Tony Luck <tony.luck@...el.com>, Tyler Baicar <tbaicar@...eaurora.org>, Dongjiu Geng <gengdongjiu@...wei.com>, Xie XiuQi <xiexiuqi@...wei.com>, torvalds@...ux-foundation.org Subject: Re: [RFC/RFT PATCH 3/6] ACPI / APEI: Replace ioremap_page_range() with fixmap On Tue, Oct 31, 2017 at 03:38:29PM +0000, James Morse wrote: > Replace ghes_io{re,un}map_pfn_{nmi,irq}()s use of ioremap_page_range() > with __set_fixmap() as ioremap_page_range() may sleep to allocate a new > level of page-table, even if its passed an existing final-address to > use in the mapping. > > clear_fixmap() does the TLB invalidation in __set_fixmap() for arm64 > and __set_pte_vaddr() for x86. In each case its the same as the > respective arch_apei_flush_tlb_one(). > > Reported-by: Fengguang Wu <fengguang.wu@...el.com> > Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org> > Signed-off-by: James Morse <james.morse@....com> > CC: Tyler Baicar <tbaicar@...eaurora.org> > CC: Dongjiu Geng <gengdongjiu@...wei.com> > CC: Xie XiuQi <xiexiuqi@...wei.com> > > --- > CC'd people I've seen posting CPER log fragments, could you give this a > test on your platforms? > > drivers/acpi/apei/ghes.c | 45 +++++++++++++++------------------------------ > 1 file changed, 15 insertions(+), 30 deletions(-) Reviewed-by: Borislav Petkov <bp@...e.de> -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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