Re: [PATCH v3 05/14] acpi/generic_event_device: add logic to detect if HEST addr is available

[Igor Mammedov <imammedo@redhat.com>]

On Fri, 31 Jan 2025 18:42:46 +0100
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Create a new property (x-has-hest-addr) and use it to detect if
> the GHES table offsets can be calculated from the HEST address
> (qemu 10.0 and upper) or via the legacy way via an offset obtained
> from the hardware_errors firmware file.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  hw/acpi/generic_event_device.c |  1 +
>  hw/acpi/ghes.c                 | 17 ++++++-----------
>  hw/arm/virt-acpi-build.c       | 32 ++++++++++++++++++++++++++++----
>  hw/core/machine.c              |  2 ++
>  include/hw/acpi/ghes.h         |  3 ++-
>  5 files changed, 39 insertions(+), 16 deletions(-)
> 
> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index 5346cae573b7..14d8513a5440 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -318,6 +318,7 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
>  
>  static const Property acpi_ged_properties[] = {
>      DEFINE_PROP_UINT32("ged-event", AcpiGedState, ged_event_bitmap, 0),
> +    DEFINE_PROP_BOOL("x-has-hest-addr", AcpiGedState, ghes_state.use_hest_addr, false),
>  };
>  
>  static const VMStateDescription vmstate_memhp_state = {
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 8f284fd191a6..a91dcd777433 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -359,7 +359,8 @@ static void build_ghes_v2_entry(GArray *table_data,
>  }
>  
>  /* Build Hardware Error Source Table */
> -void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
> +void acpi_build_hest(AcpiGhesState *ags, GArray *table_data,
> +                     GArray *hardware_errors,
>                       BIOSLinker *linker,
>                       const AcpiNotificationSourceId *notif_source,
>                       int num_sources,
> @@ -369,14 +370,6 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                          .oem_id = oem_id, .oem_table_id = oem_table_id };
>      uint32_t hest_offset;
>      int i;
> -    AcpiGedState *acpi_ged_state;
> -    AcpiGhesState *ags = NULL;
> -
> -    acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
> -                                                       NULL));
> -    if (acpi_ged_state) {
> -        ags = &acpi_ged_state->ghes_state;
> -    }

hmh, can we move this once within series to the place where it should end up at,
instead of rewriting just added code over again,
somewhere at the being of series (maybe as separate patch)?


>      hest_offset = table_data->len;
>  
> @@ -415,8 +408,10 @@ 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);
> +    if (ags->use_hest_addr) {
> +        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);
> +    }

the same as comment in 3/14, please no flipping back and forth which might
break bisection. Also this hunk looks misplaced and should be a part of 3/14

and do not forget about ACPI_HW_ERROR_ADDR_FW_CFG_FILE, that should be excluded
when use_hest_addr == TRUE

I see that 6/14 does that, but order makes it 
 
>  
>      ags->present = true;
>  }
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 3d411787fc37..9de51105a513 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -897,6 +897,10 @@ static const AcpiNotificationSourceId hest_ghes_notify[] = {
>      { ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA },
>  };
>  
> +static const AcpiNotificationSourceId hest_ghes_notify_9_2[] = {
> +    { ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA },
> +};
> +
>  static
>  void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
>  {
> @@ -950,10 +954,30 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
>      build_dbg2(tables_blob, tables->linker, vms);
>  
>      if (vms->ras) {
> -        acpi_add_table(table_offsets, tables_blob);
> -        acpi_build_hest(tables_blob, tables->hardware_errors, tables->linker,
> -                        hest_ghes_notify, ARRAY_SIZE(hest_ghes_notify),
> -                        vms->oem_id, vms->oem_table_id);
> +        static const AcpiNotificationSourceId *notify;
> +        AcpiGedState *acpi_ged_state;
> +        unsigned int notify_sz;
> +        AcpiGhesState *ags;
> +
> +        acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
> +                                                       NULL));
> +        if (acpi_ged_state) {
> +            ags = &acpi_ged_state->ghes_state;
> +
> +            acpi_add_table(table_offsets, tables_blob);
> +
> +            if (!ags->use_hest_addr) {
> +                notify = hest_ghes_notify_9_2;
> +                notify_sz = ARRAY_SIZE(hest_ghes_notify_9_2);

all 9.2 compat hunks look misplaced,
they have no relation to using HEST addr at all,
they belong to the patches that introduce new error type
i.e. where hest_ghes_notify mutates to 2 entry array.

> +            } else {
> +                notify = hest_ghes_notify;
> +                notify_sz = ARRAY_SIZE(hest_ghes_notify);
> +            }
> +
> +            acpi_build_hest(ags, tables_blob, tables->hardware_errors,
> +                            tables->linker, notify, notify_sz,
> +                            vms->oem_id, vms->oem_table_id);
> +        }
>      }
>  
>      if (ms->numa_state->num_nodes > 0) {
> diff --git a/hw/core/machine.c b/hw/core/machine.c
> index c23b39949649..0d0cde481954 100644
> --- a/hw/core/machine.c
> +++ b/hw/core/machine.c
> @@ -34,10 +34,12 @@
>  #include "hw/virtio/virtio-pci.h"
>  #include "hw/virtio/virtio-net.h"
>  #include "hw/virtio/virtio-iommu.h"
> +#include "hw/acpi/generic_event_device.h"
>  #include "audio/audio.h"
>  
>  GlobalProperty hw_compat_9_2[] = {
>      {"arm-cpu", "backcompat-pauth-default-use-qarma5", "true"},
> +    { TYPE_ACPI_GED, "x-has-hest-addr", "false" },
>  };
>  const size_t hw_compat_9_2_len = G_N_ELEMENTS(hw_compat_9_2);
>  
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 6c2e57af0456..bfc8fd851648 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -76,7 +76,8 @@ typedef struct AcpiNotificationSourceId {
>      enum AcpiGhesNotifyType notify;
>  } AcpiNotificationSourceId;
>  
> -void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
> +void acpi_build_hest(AcpiGhesState *ags, GArray *table_data,
> +                     GArray *hardware_errors,
>                       BIOSLinker *linker,
>                       const AcpiNotificationSourceId * const notif_source,
>                       int num_sources,