Re: [PATCH 02/11] acpi/ghes: add a firmware file with HEST address

[Jonathan Cameron <Jonathan.Cameron@huawei.com>]

On Wed, 22 Jan 2025 16:46:19 +0100
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Store HEST table address at GPA, placing its content at
> hest_addr_le variable.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
A few trivial things inline.

Jonathan

> ---
> 
> Change from v8:
> - hest_addr_lr is now pointing to the error source size and data.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Bonus.  I guess you really like this patch :)
> ---
>  hw/acpi/ghes.c         | 17 ++++++++++++++++-
>  include/hw/acpi/ghes.h |  1 +
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 3f519ccab90d..34e3364d3fd8 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -30,6 +30,7 @@
>  
>  #define ACPI_HW_ERROR_FW_CFG_FILE           "etc/hardware_errors"
>  #define ACPI_HW_ERROR_ADDR_FW_CFG_FILE      "etc/hardware_errors_addr"
> +#define ACPI_HEST_ADDR_FW_CFG_FILE          "etc/acpi_table_hest_addr"
>  
>  /* The max size in bytes for one error block */
>  #define ACPI_GHES_MAX_RAW_DATA_LENGTH   (1 * KiB)
> @@ -261,7 +262,7 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
>      }
>  
>      /*
> -     * tell firmware to write hardware_errors GPA into
> +     * Tell firmware to write hardware_errors GPA into

Sneaky tidy up.  No problem with it in general but adding noise here, so if there
are others in the series maybe gather them up in a cleanup patch.

>       * hardware_errors_addr fw_cfg, once the former has been initialized.
>       */
>      bios_linker_loader_write_pointer(linker, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, 0,
> @@ -355,6 +356,8 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>  
>      acpi_table_begin(&table, table_data);
>  
> +    int hest_offset = table_data->len;

Local style looks to be traditional C with definitions at top.  Maybe define
hest_offset up a few lines and just set it here?

> +
>      /* Error Source Count */
>      build_append_int_noprefix(table_data, num_sources, 4);
>      for (i = 0; i < num_sources; i++) {
> @@ -362,6 +365,15 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>      }
>  
>      acpi_table_end(linker, &table);
> +
> +    /*
> +     * tell firmware to write into GPA the address of HEST via fw_cfg,

Given the tidy up above, fix this one to have a capital T, or was this
where you meant to change it?

> +     * once initialized.
> +     */
> +    bios_linker_loader_write_pointer(linker,
> +                                     ACPI_HEST_ADDR_FW_CFG_FILE, 0,

Could wrap less and stay under 80 chars as both lines above add up to 70 something

> +                                     sizeof(uint64_t),
> +                                     ACPI_BUILD_TABLE_FILE, hest_offset);
>  }