[PATCH RFC] apei: xgene: Add ACPI APEI support for X-Gene

[bp@alien8.de (Borislav Petkov)]

On Thu, Oct 01, 2015 at 06:51:52PM -0600, Loc Ho wrote:
> Add ACPI APEI support for X-Gene platform. This patch requires [1] to 
> configiure and build.
> 
> [1] http://marc.info/?l=linux-kernel&m=143955588312730&w=2 
> 
> Signed-off-by: Tuan Phan <tphan@apm.com>
> Signed-off-by: Loc Ho <lho@apm.com>
> ---
>  drivers/edac/Kconfig      |    7 +++
>  drivers/edac/Makefile     |    2 +
>  drivers/edac/xgene_apei.c |  120 +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 129 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/edac/xgene_apei.c
> 
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index ef25000..f489852 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -390,4 +390,11 @@ config EDAC_XGENE
>  	  Support for error detection and correction on the
>  	  APM X-Gene family of SOCs.
>  
> +config EDAC_XGENE_APEI
> +	tristate "APM X-Gene SoC APEI"
> +	depends on ACPI_APEI && (ARM64 || COMPILE_TEST)
> +	help
> +	  APEI interface support for error detection and correction on the
> +	  APM X-Gene family of SOCs.
> +
>  endif # EDAC
> diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
> index dbf53e0..27dbae1 100644
> --- a/drivers/edac/Makefile
> +++ b/drivers/edac/Makefile
> @@ -70,3 +70,5 @@ obj-$(CONFIG_EDAC_OCTEON_PCI)		+= octeon_edac-pci.o
>  obj-$(CONFIG_EDAC_ALTERA_MC)		+= altera_edac.o
>  obj-$(CONFIG_EDAC_SYNOPSYS)		+= synopsys_edac.o
>  obj-$(CONFIG_EDAC_XGENE)		+= xgene_edac.o
> +obj-$(CONFIG_EDAC_XGENE_APEI)		+= xgene_apei.o
> +
> diff --git a/drivers/edac/xgene_apei.c b/drivers/edac/xgene_apei.c
> new file mode 100644
> index 0000000..6ec416f
> --- /dev/null
> +++ b/drivers/edac/xgene_apei.c
> @@ -0,0 +1,120 @@
> +/*
> + * AppliedMicro X-Gene APEI Driver
> + *
> + * Copyright (c) 2015, Applied Micro Circuits Corporation
> + * Author: Tuan Phan <tphan@apm.com>
> + *
> + * This program is free software; you can redistribute  it and/or modify it
> + * under  the terms of  the GNU General  Public License as published by the
> + * Free Software Foundation;  either version 2 of the  License, or (at your
> + * option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <http://www.gnu.org/licenses/>.
> + *
> + * This driver provides the interrupt hook up with the UEFI FW for the X-Gene
> + * SoC processor under the following conditions:
> + *
> + * 1. No interrupt GPIO available or don't want to use one and no EL3 support
> + * 2. With EL3 support, but no mean to interrupt the Linux OS that an event
> + *    has occurred.

Why is this an x-gene-specific driver and not a generic, APEI one, like
ghes_edac? I'd like to see a single ARM64 APEI/GHES/whatever driver
which is programmed against the spec - no vendor-specific stuff. And I
don't see anything vendor-specific below except xgene_apei_acpi_match
which can be part of the generic driver.

-- 
Regards/Gruss,
    Boris.

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