Re: [RFC/RFT PATCH 2/6] x86/mm/fixmap: Add GHES fixmap entries

From: Ingo Molnar
Date: Tue Oct 31 2017 - 15:04:49 EST



* James Morse <james.morse@xxxxxxx> wrote:

> GHES is switching to use fixmap for its dynamic mapping of CPER records,
> to avoid using ioremap_page_range() in IRQ/NMI context.
>
> Signed-off-by: James Morse <james.morse@xxxxxxx>
> ---
> arch/x86/include/asm/fixmap.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
> index dcd9fb55e679..be3cc32db7f0 100644
> --- a/arch/x86/include/asm/fixmap.h
> +++ b/arch/x86/include/asm/fixmap.h
> @@ -104,6 +104,10 @@ enum fixed_addresses {
> FIX_GDT_REMAP_BEGIN,
> FIX_GDT_REMAP_END = FIX_GDT_REMAP_BEGIN + NR_CPUS - 1,
>
> + /* Used for GHES mapping from assorted contexts */
> + FIX_APEI_GHES_IRQ,
> + FIX_APEI_GHES_NMI,
> +

Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

Thanks,

Ingo