linux-kernel - Re: [PATCH v4 14/15] acpi/ghes: Change ghes fill logic to work with only one source

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Message-ID: <20241203125253.5a11194b@imammedo.users.ipa.redhat.com>
Date: Tue, 3 Dec 2024 12:52:53 +0100
From: Igor Mammedov <imammedo@...hat.com>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.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 v4 14/15] acpi/ghes: Change ghes fill logic to work with
 only one source

On Fri, 22 Nov 2024 10:11:31 +0100
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:

> Extending to multiple sources require a BIOS pointer to the
> beginning of the HEST table, which in turn requires a backward-compatible
> code.
> 
> So, the current code supports only one source. Ensure that and simplify
> the code.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

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

> ---
>  hw/acpi/ghes.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index d99697b20164..b0b1865dc8d3 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -387,15 +387,13 @@ static void get_hw_error_offsets(uint64_t ghes_addr,
>       * As the current version supports only one source, the ack offset is
>       * just sizeof(uint64_t).
>       */
> -    *read_ack_register_addr = ghes_addr +
> -			      ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
> +    *read_ack_register_addr = ghes_addr + sizeof(uint64_t);
>  }
>  
>  void ghes_record_cper_errors(const void *cper, size_t len,
>                               uint16_t source_id, Error **errp)
>  {
>      uint64_t cper_addr = 0, read_ack_register_addr = 0, read_ack_register;
> -    uint64_t start_addr;
>      AcpiGedState *acpi_ged_state;
>      AcpiGhesState *ags;
>  
> @@ -412,11 +410,9 @@ void ghes_record_cper_errors(const void *cper, size_t len,
>      }
>      ags = &acpi_ged_state->ghes_state;
>  
> -    start_addr = le64_to_cpu(ags->hw_error_le);
> -
> -    start_addr += source_id * sizeof(uint64_t);
> -
> -    get_hw_error_offsets(start_addr, &cper_addr, &read_ack_register_addr);
> +    assert(ACPI_GHES_ERROR_SOURCE_COUNT == 1);
> +    get_hw_error_offsets(le64_to_cpu(ags->hw_error_le),
> +                         &cper_addr, &read_ack_register_addr);
>  
>      cper_addr = le64_to_cpu(cper_addr);
>      if (!cper_addr) {