linux-kernel - Re: [PATCH 2/2] MIPS: Loongson64: Move loongson_system

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Date:   Fri, 5 Mar 2021 11:01:49 +0100
From:   Philippe Mathieu-Daudé <f4bug@...at.org>
To:     Qing Zhang <zhangqing@...ngson.cn>
Cc:     Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] MIPS: Loongson64: Move loongson_system_configuration
 to loongson.h

Hi,

On Thu, Mar 4, 2021 at 5:35 PM Qing Zhang <zhangqing@...ngson.cn> wrote:
>
> The purpose of separating loongson_system_configuration from boot_param.h
> is to keep the other structure consistent with the firmware.

This is supposed to be a trivial patch, but the description actually
confuses me.

Why is the move out of "boot_param.h" keeping it consistent with fw?

> Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
> Signed-off-by: Qing Zhang <zhangqing@...ngson.cn>
> ---
>  .../include/asm/mach-loongson64/boot_param.h   | 18 ------------------
>  .../include/asm/mach-loongson64/loongson.h     | 18 ++++++++++++++++++
>  drivers/irqchip/irq-loongson-liointc.c         |  2 +-
>  3 files changed, 19 insertions(+), 19 deletions(-)
>
> diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
> index 1c1cdf57137e..035b1a69e2d0 100644
> --- a/arch/mips/include/asm/mach-loongson64/boot_param.h
> +++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
> @@ -198,24 +198,6 @@ enum loongson_bridge_type {
>         VIRTUAL = 3
>  };
>
> -struct loongson_system_configuration {
> -       u32 nr_cpus;
> -       u32 nr_nodes;
> -       int cores_per_node;
> -       int cores_per_package;
> -       u16 boot_cpu_id;
> -       u16 reserved_cpus_mask;
> -       enum loongson_cpu_type cputype;
> -       enum loongson_bridge_type bridgetype;
> -       u64 restart_addr;
> -       u64 poweroff_addr;
> -       u64 suspend_addr;
> -       u64 vgabios_addr;
> -       u32 dma_mask_bits;
> -       u64 workarounds;
> -       void (*early_config)(void);
> -};
> -
>  extern struct efi_memory_map_loongson *loongson_memmap;
>  extern struct loongson_system_configuration loongson_sysconf;
>
> diff --git a/arch/mips/include/asm/mach-loongson64/loongson.h b/arch/mips/include/asm/mach-loongson64/loongson.h
> index ac1c20e172a2..6189deb188cf 100644
> --- a/arch/mips/include/asm/mach-loongson64/loongson.h
> +++ b/arch/mips/include/asm/mach-loongson64/loongson.h
> @@ -12,6 +12,24 @@
>  #include <linux/irq.h>
>  #include <boot_param.h>
>
> +/* machine-specific boot configuration */
> +struct loongson_system_configuration {
> +       u32 nr_cpus;
> +       u32 nr_nodes;
> +       int cores_per_node;
> +       int cores_per_package;
> +       u16 boot_cpu_id;
> +       u16 reserved_cpus_mask;
> +       enum loongson_cpu_type cputype;
> +       enum loongson_bridge_type bridgetype;
> +       u64 restart_addr;
> +       u64 poweroff_addr;
> +       u64 suspend_addr;
> +       u64 vgabios_addr;
> +       u32 dma_mask_bits;
> +       u64 workarounds;
> +       void (*early_config)(void);
> +};
>
>  /* machine-specific reboot/halt operation */
>  extern void mach_prepare_reboot(void);
> diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
> index 09b91b81851c..249566a23cc4 100644
> --- a/drivers/irqchip/irq-loongson-liointc.c
> +++ b/drivers/irqchip/irq-loongson-liointc.c
> @@ -16,7 +16,7 @@
>  #include <linux/smp.h>
>  #include <linux/irqchip/chained_irq.h>
>
> -#include <boot_param.h>
> +#include <loongson.h>
>
>  #define LIOINTC_CHIP_IRQ       32
>  #define LIOINTC_NUM_PARENT 4
> --
> 2.20.1
>