On Wed, May 11, 2022 at 03:21:13PM +0900, Hitomi Hasegawa wrote:
> Enable diagnostic interrupts for the Fujitsu A64FX.
> 
> Register the NMI/IRQ corresponding to the A64FX's device definition
> dedicated to diagnostic interrupts, so that when this interrupt is
> sent using the BMC, it causes a panic. This can be used to obtain
> a kernel dump.
> 
> Signed-off-by: Hitomi Hasegawa <hasegawa-hit...@fujitsu.com>
> ---
>  MAINTAINERS                      |   5 +
>  drivers/soc/Kconfig              |   1 +
>  drivers/soc/Makefile             |   1 +
>  drivers/soc/fujitsu/Kconfig      |  13 +++
>  drivers/soc/fujitsu/Makefile     |   3 +
>  drivers/soc/fujitsu/a64fx-diag.c | 155 +++++++++++++++++++++++++++++++
>  6 files changed, 178 insertions(+)
>  create mode 100644 drivers/soc/fujitsu/Kconfig
>  create mode 100644 drivers/soc/fujitsu/Makefile
>  create mode 100644 drivers/soc/fujitsu/a64fx-diag.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index cd0f68d4a34a..dc35c81ba917 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -241,6 +241,11 @@ F:       include/trace/events/9p.h
>  F:   include/uapi/linux/virtio_9p.h
>  F:   net/9p/
>  
> +A64FX DIAG DRIVER
> +M:   Hitomi Hasegawa <hasegawa-hit...@fujitsu.com>
> +S:   Supported
> +F:   drivers/soc/fujitsu/a64fx-diag.c
> +
>  A8293 MEDIA DRIVER
>  M:   Antti Palosaari <cr...@iki.fi>
>  L:   linux-me...@vger.kernel.org
> diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
> index a8562678c437..e10eb27e1e7e 100644
> --- a/drivers/soc/Kconfig
> +++ b/drivers/soc/Kconfig
> @@ -9,6 +9,7 @@ source "drivers/soc/atmel/Kconfig"
>  source "drivers/soc/bcm/Kconfig"
>  source "drivers/soc/canaan/Kconfig"
>  source "drivers/soc/fsl/Kconfig"
> +source "drivers/soc/fujitsu/Kconfig"
>  source "drivers/soc/imx/Kconfig"
>  source "drivers/soc/ixp4xx/Kconfig"
>  source "drivers/soc/litex/Kconfig"
> diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
> index adb30c2d4fea..b12b0b03ad47 100644
> --- a/drivers/soc/Makefile
> +++ b/drivers/soc/Makefile
> @@ -12,6 +12,7 @@ obj-$(CONFIG_SOC_CANAAN)    += canaan/
>  obj-$(CONFIG_ARCH_DOVE)              += dove/
>  obj-$(CONFIG_MACH_DOVE)              += dove/
>  obj-y                                += fsl/
> +obj-y                                += fujitsu/

Why a sub directory for just one .c file?

>  obj-$(CONFIG_ARCH_GEMINI)    += gemini/
>  obj-y                                += imx/
>  obj-y                                += ixp4xx/
> diff --git a/drivers/soc/fujitsu/Kconfig b/drivers/soc/fujitsu/Kconfig
> new file mode 100644
> index 000000000000..e05c40725922
> --- /dev/null
> +++ b/drivers/soc/fujitsu/Kconfig
> @@ -0,0 +1,13 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +menu "fujitsu SoC drivers"
> +
> +config A64FX_DIAG
> +     tristate "A64FX diag driver"
> +     depends on ARM64
> +     depends on ACPI
> +     help
> +       Say Y here if you want to enable diag interrupt on Fujitsu A64FX.
> +
> +       If unsure, say N.

You need to provide more information about what this driver does and
what it is here.

thanks,

greg k-h


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