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 ++ arch/x86/include/asm/fixmap.h | 4 ++ arch/x86/kernel/acpi/apei.c | 5 --- drivers/acpi/apei/ghes.c | 84 +++++++++-------------------------------- include/acpi/apei.h | 1 - 7 files changed, 30 insertions(+), 85 deletions(-) -- 2.15.0.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
