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.dea...@arm.com> for the arm64 bits. Will
