linux-kernel - Re: [PATCH v2 04/15] acpi/ghes: better handle source

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Message-ID: <20241002152809.0dcc4013@imammedo.users.ipa.redhat.com>
Date: Wed, 2 Oct 2024 15:28:09 +0200
From: Igor Mammedov <imammedo@...hat.com>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc: "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, Jonathan Cameron
 <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v2 04/15] acpi/ghes: better handle source_id and
 notification

On Tue,  1 Oct 2024 09:03:41 +0200
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:

> GHES has two fields that are stored on HEST error source
> blocks:
> 
> - notification type, which is a number defined at the ACPI spec
>   containing several arch-specific synchronous and assynchronous
>   types;
> - source id, which is a HW/FW defined number, used to distinguish
>   between different implemented hardware report mechanisms.
there could be several sources with the same
hardware report mechanisms /aka notification type/

s/between different implemented hardware report mechanisms/
  different implemented sources.




> Cleanup the logic to fill those, as they should be handled
> independently.

above doesn't really say/describe the patch's intent

> This is a preparation for a future patch that will shift
> those fields to the HEST init function call.

not relevant in this series

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> 
> ---
> 
> Chenges from v10:
> 
> - Some changes got moved to the previous patch.
> 
> Changes from v8:
> - Non-rename/cleanup changes merged altogether;
> - source ID is now more generic, defined per guest target.
>   That should make easier to add support for 86.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  hw/acpi/ghes.c | 23 +++++++++--------------
>  1 file changed, 9 insertions(+), 14 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 4a6c45bcb4be..29cd7e4d8171 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -284,9 +284,13 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
>  }
>  
>  /* Build Generic Hardware Error Source version 2 (GHESv2) */
> -static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
> +static void build_ghes_v2(GArray *table_data,
> +                          BIOSLinker *linker,
> +                          enum AcpiGhesNotifyType notify,
> +                          uint16_t source_id)
>  {
>      uint64_t address_offset;
> +
>      /*
>       * Type:
>       * Generic Hardware Error Source version 2(GHESv2 - Type 10)
> @@ -316,18 +320,8 @@ static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
>          address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
>          ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
>  
> -    switch (source_id) {
> -    case ACPI_HEST_SRC_ID_SEA:
> -        /*
> -         * Notification Structure
> -         * Now only enable ARMv8 SEA notification type
> -         */
> -        build_ghes_hw_error_notification(table_data, ACPI_GHES_NOTIFY_SEA);
> -        break;
> -    default:
> -        error_report("Not support this error source");
> -        abort();
> -    }
> +    /* Notification Structure */
> +    build_ghes_hw_error_notification(table_data, notify);
>  
>      /* Error Status Block Length */
>      build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
> @@ -369,7 +363,8 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>  
>      /* Error Source Count */
>      build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
> -    build_ghes_v2(table_data, ACPI_HEST_SRC_ID_SEA, linker);
> +    build_ghes_v2(table_data, linker,
> +                  ACPI_GHES_NOTIFY_SEA, ACPI_HEST_SRC_ID_SEA);
>  
>      acpi_table_end(linker, &table);
>  }