linux-kernel - Re: [PATCH 2/6] acpi/ghes: add a firmware file with HEST address

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Message-ID: <20241120143214.00003570@huawei.com>
Date: Wed, 20 Nov 2024 14:32:14 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
CC: Igor Mammedov <imammedo@...hat.com>, Shiju Jose <shiju.jose@...wei.com>,
	"Michael S. Tsirkin" <mst@...hat.com>, Ani Sinha <anisinha@...hat.com>,
	Dongjiu Geng <gengdongjiu1@...il.com>, <linux-kernel@...r.kernel.org>,
	<qemu-arm@...gnu.org>, <qemu-devel@...gnu.org>
Subject: Re: [PATCH 2/6] acpi/ghes: add a firmware file with HEST address

On Wed, 13 Nov 2024 09:36:59 +0100
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:

> Store HEST table address at GPA, placing its content at
> hest_addr_le variable.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> 
> ---
> 
> Change from v8:
> - hest_addr_lr is now pointing to the error source size and data.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Drop the extra SoB. Doesn't matter really but looks strange in the
patch.

One trivial inline.

This stuff always gives me a headache, so with that in mind, looks
fine to me.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>


> ---
>  hw/acpi/ghes.c         | 15 +++++++++++++++
>  include/hw/acpi/ghes.h |  1 +
>  2 files changed, 16 insertions(+)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index a590b0f6f85f..4cd79d42cd04 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)
> @@ -361,6 +362,8 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>  
>      acpi_table_begin(&table, table_data);
>  
> +    int hest_offset = table_data->len;
> +
>      /* Error Source Count */
>      build_append_int_noprefix(table_data, num_sources, 4);
>      for (i = 0; i < num_sources; i++) {
> @@ -368,6 +371,15 @@ 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,
Tell

File is inconsistent but mostly uses a capital to start.
> +     * once initialized.
> +     */
> +    bios_linker_loader_write_pointer(linker,
> +                                     ACPI_HEST_ADDR_FW_CFG_FILE, 0,
> +                                     sizeof(uint64_t),
> +                                     ACPI_BUILD_TABLE_FILE, hest_offset);
>  }
esState;