Re: [PATCH v3 02/14] acpi/ghes: add a firmware file with HEST address

[Igor Mammedov <imammedo@redhat.com>]

On Fri, 31 Jan 2025 18:42:43 +0100
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Store HEST table address at GPA, placing its the start of the table at
> hest_addr_le variable.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/acpi/ghes.c         | 16 ++++++++++++++++
>  include/hw/acpi/ghes.h |  1 +
>  2 files changed, 17 insertions(+)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 4cabb177ad47..27478f2d5674 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)
> @@ -349,8 +350,11 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>  {
>      AcpiTable table = { .sig = "HEST", .rev = 1,
>                          .oem_id = oem_id, .oem_table_id = oem_table_id };
> +    uint32_t hest_offset;
>      int i;
>  
> +    hest_offset = table_data->len;
> +
>      build_ghes_error_table(hardware_errors, linker, num_sources);
>  
>      acpi_table_begin(&table, table_data);
> @@ -362,6 +366,15 @@ 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,
> +     * once initialized.
> +     */
> +    bios_linker_loader_write_pointer(linker,
> +                                     ACPI_HEST_ADDR_FW_CFG_FILE, 0,
> +                                     sizeof(uint64_t),
> +                                     ACPI_BUILD_TABLE_FILE, hest_offset);
>  }
>  
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
> @@ -375,6 +388,9 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
>      fw_cfg_add_file_callback(s, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, NULL, NULL,
>          NULL, &(ags->hw_error_le), sizeof(ags->hw_error_le), false);
>  
> +    fw_cfg_add_file_callback(s, ACPI_HEST_ADDR_FW_CFG_FILE, NULL, NULL,
> +        NULL, &(ags->hest_addr_le), sizeof(ags->hest_addr_le), false);
> +
>      ags->present = true;
>  }
>  
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 9f0120d0d596..237721fec0a2 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -58,6 +58,7 @@ enum AcpiGhesNotifyType {
>  };
>  
>  typedef struct AcpiGhesState {
> +    uint64_t hest_addr_le;
>      uint64_t hw_error_le;
>      bool present; /* True if GHES is present at all on this board */
>  } AcpiGhesState;