[PATCH v2 00/15] Prepare GHES driver to support error injection

[PATCH v2 00/15] Prepare GHES driver to support error injection

[Mauro Carvalho Chehab]

During the development of a patch series meant to allow GHESv2 error injections,
it was requested a change on how CPER offsets are calculated, by adding a new
BIOS pointer and reworking the GHES logic. See:

https://lore.kernel.org/qemu-devel/cover.1726293808.git.mchehab+huawei@kernel.org/

Such change ended being a big patch, so several intermediate steps are needed,
together with several cleanups and renames.

As agreed duing v10 review, I'll be splitting the big patch series into separate pull 
requests, starting with the cleanup series. This is the first patch set, containing
only such preparation patches.

The next series will contain the shift to use offsets from the location of the
HEST table, together with a migration logic to make it compatible with 9.1.

---

v2: 
- some indentation fixes;
- some description improvements;
- fixed a badly-solved merge conflict that ended renaming a parameter.

Mauro Carvalho Chehab (15):
  acpi/ghes: get rid of ACPI_HEST_SRC_ID_RESERVED
  acpi/ghes: simplify acpi_ghes_record_errors() code
  acpi/ghes: simplify the per-arch caller to build HEST table
  acpi/ghes: better handle source_id and notification
  acpi/ghes: Fix acpi_ghes_record_errors() argument
  acpi/ghes: Remove a duplicated out of bounds check
  acpi/ghes: Change the type for source_id
  acpi/ghes: Prepare to support multiple sources on ghes
  acpi/ghes: make the GHES record generation more generic
  acpi/ghes: move offset calculus to a separate function
  acpi/ghes: better name GHES memory error function
  acpi/ghes: don't crash QEMU if ghes GED is not found
  acpi/ghes: rename etc/hardware_error file macros
  acpi/ghes: better name the offset of the hardware error firmware
  docs: acpi_hest_ghes: fix documentation for CPER size

 docs/specs/acpi_hest_ghes.rst  |   6 +-
 hw/acpi/generic_event_device.c |   4 +-
 hw/acpi/ghes-stub.c            |   2 +-
 hw/acpi/ghes.c                 | 279 ++++++++++++++++++++-------------
 hw/arm/virt-acpi-build.c       |  10 +-
 include/hw/acpi/ghes.h         |  34 ++--
 target/arm/kvm.c               |   3 +-
 7 files changed, 206 insertions(+), 132 deletions(-)

-- 
2.46.0

[PATCH v2 01/15] acpi/ghes: get rid of ACPI_HEST_SRC_ID_RESERVED

[Mauro Carvalho Chehab]

This is just duplicating ACPI_GHES_ERROR_SOURCE_COUNT, which
has a better name. So, drop the duplication.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c         | 7 ++-----
 include/hw/acpi/ghes.h | 3 ++-
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index e9511d9b8f71..dc217694deb9 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -34,9 +34,6 @@
 /* The max size in bytes for one error block */
 #define ACPI_GHES_MAX_RAW_DATA_LENGTH   (1 * KiB)
 
-/* Now only support ARMv8 SEA notification type error source */
-#define ACPI_GHES_ERROR_SOURCE_COUNT        1
-
 /* Generic Hardware Error Source version 2 */
 #define ACPI_GHES_SOURCE_GENERIC_ERROR_V2   10
 
@@ -396,7 +393,7 @@ int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
     AcpiGedState *acpi_ged_state;
     AcpiGhesState *ags;
 
-    assert(source_id < ACPI_HEST_SRC_ID_RESERVED);
+    assert(source_id < ACPI_GHES_ERROR_SOURCE_COUNT);
 
     acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
                                                        NULL));
@@ -407,7 +404,7 @@ int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
 
     if (physical_address) {
 
-        if (source_id < ACPI_HEST_SRC_ID_RESERVED) {
+        if (source_id < ACPI_GHES_ERROR_SOURCE_COUNT) {
             start_addr += source_id * sizeof(uint64_t);
         }
 
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 674f6958e905..59e3b8fb24b9 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -59,7 +59,8 @@ enum AcpiGhesNotifyType {
 enum {
     ACPI_HEST_SRC_ID_SEA = 0,
     /* future ids go here */
-    ACPI_HEST_SRC_ID_RESERVED,
+
+    ACPI_GHES_ERROR_SOURCE_COUNT
 };
 
 typedef struct AcpiGhesState {
-- 
2.46.0

[PATCH v2 02/15] acpi/ghes: simplify acpi_ghes_record_errors() code

[Mauro Carvalho Chehab]

Reduce the ident of the function and prepares it for
the next changes.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c | 56 ++++++++++++++++++++++++++------------------------
 1 file changed, 29 insertions(+), 27 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index dc217694deb9..e66f3be1502b 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -402,40 +402,42 @@ int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
 
     start_addr = le64_to_cpu(ags->ghes_addr_le);
 
-    if (physical_address) {
+    if (!physical_address) {
+        return -1;
+    }
 
-        if (source_id < ACPI_GHES_ERROR_SOURCE_COUNT) {
-            start_addr += source_id * sizeof(uint64_t);
-        }
+    if (source_id < ACPI_GHES_ERROR_SOURCE_COUNT) {
+        start_addr += source_id * sizeof(uint64_t);
+    }
 
-        cpu_physical_memory_read(start_addr, &error_block_addr,
-                                 sizeof(error_block_addr));
+    cpu_physical_memory_read(start_addr, &error_block_addr,
+                             sizeof(error_block_addr));
 
-        error_block_addr = le64_to_cpu(error_block_addr);
+    error_block_addr = le64_to_cpu(error_block_addr);
 
-        read_ack_register_addr = start_addr +
-            ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
+    read_ack_register_addr = start_addr +
+                             ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
 
-        cpu_physical_memory_read(read_ack_register_addr,
-                                 &read_ack_register, sizeof(read_ack_register));
+    cpu_physical_memory_read(read_ack_register_addr,
+                             &read_ack_register, sizeof(read_ack_register));
 
-        /* zero means OSPM does not acknowledge the error */
-        if (!read_ack_register) {
-            error_report("OSPM does not acknowledge previous error,"
-                " so can not record CPER for current error anymore");
-        } else if (error_block_addr) {
-            read_ack_register = cpu_to_le64(0);
-            /*
-             * Clear the Read Ack Register, OSPM will write it to 1 when
-             * it acknowledges this error.
-             */
-            cpu_physical_memory_write(read_ack_register_addr,
-                &read_ack_register, sizeof(uint64_t));
+    /* zero means OSPM does not acknowledge the error */
+    if (!read_ack_register) {
+        error_report("OSPM does not acknowledge previous error,"
+                     " so can not record CPER for current error anymore");
+    } else if (error_block_addr) {
+        read_ack_register = cpu_to_le64(0);
+        /*
+         * Clear the Read Ack Register, OSPM will write it to 1 when
+         * it acknowledges this error.
+         */
+        cpu_physical_memory_write(read_ack_register_addr,
+                                  &read_ack_register, sizeof(uint64_t));
 
-            ret = acpi_ghes_record_mem_error(error_block_addr,
-                                             physical_address);
-        } else
-            error_report("can not find Generic Error Status Block");
+        ret = acpi_ghes_record_mem_error(error_block_addr,
+                                         physical_address);
+    } else {
+        error_report("can not find Generic Error Status Block");
     }
 
     return ret;
-- 
2.46.0

[PATCH v2 03/15] acpi/ghes: simplify the per-arch caller to build HEST table

[Mauro Carvalho Chehab]

The GHES driver requires not only a HEST table, but also a
separate firmware file to store Error Structure records.
It can't do one without the other.

Simplify the caller logic for it to require one function.

This prepares for further changes where the HEST table
generation will become more generic.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

---

Changes from v10:
- Removed the logic which associates notification and source
  ID. This will be placed on a separate 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@kernel.org>
---
 hw/acpi/ghes.c           | 7 +++++--
 hw/arm/virt-acpi-build.c | 5 ++---
 include/hw/acpi/ghes.h   | 4 ++--
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index e66f3be1502b..4a6c45bcb4be 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -233,7 +233,7 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address,
  * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
  * See docs/specs/acpi_hest_ghes.rst for blobs format.
  */
-void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
+static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
 {
     int i, error_status_block_offset;
 
@@ -356,12 +356,15 @@ static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
 }
 
 /* Build Hardware Error Source Table */
-void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
+void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
+                     BIOSLinker *linker,
                      const char *oem_id, const char *oem_table_id)
 {
     AcpiTable table = { .sig = "HEST", .rev = 1,
                         .oem_id = oem_id, .oem_table_id = oem_table_id };
 
+    build_ghes_error_table(hardware_errors, linker);
+
     acpi_table_begin(&table, table_data);
 
     /* Error Source Count */
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index f76fb117adff..bafd9a56c217 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -943,10 +943,9 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
     build_dbg2(tables_blob, tables->linker, vms);
 
     if (vms->ras) {
-        build_ghes_error_table(tables->hardware_errors, tables->linker);
         acpi_add_table(table_offsets, tables_blob);
-        acpi_build_hest(tables_blob, tables->linker, vms->oem_id,
-                        vms->oem_table_id);
+        acpi_build_hest(tables_blob, tables->hardware_errors, tables->linker,
+                        vms->oem_id, vms->oem_table_id);
     }
 
     if (ms->numa_state->num_nodes > 0) {
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 59e3b8fb24b9..20016c226d1f 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -68,8 +68,8 @@ typedef struct AcpiGhesState {
     bool present; /* True if GHES is present at all on this board */
 } AcpiGhesState;
 
-void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker);
-void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
+void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
+                     BIOSLinker *linker,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
-- 
2.46.0

Re: [PATCH v2 03/15] acpi/ghes: simplify the per-arch caller to build HEST table

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:40 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> The GHES driver requires not only a HEST table, but also a
> separate firmware file to store Error Structure records.
> It can't do one without the other.
> 
> Simplify the caller logic for it to require one function.

> This prepares for further changes where the HEST table
> generation will become more generic.

I'd drop this

> No functional changes.
> 
> 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>

> 
> ---
> 
> Changes from v10:
> - Removed the logic which associates notification and source
>   ID. This will be placed on a separate 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@kernel.org>
> ---
>  hw/acpi/ghes.c           | 7 +++++--
>  hw/arm/virt-acpi-build.c | 5 ++---
>  include/hw/acpi/ghes.h   | 4 ++--
>  3 files changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index e66f3be1502b..4a6c45bcb4be 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -233,7 +233,7 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address,
>   * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
>   * See docs/specs/acpi_hest_ghes.rst for blobs format.
>   */
> -void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
> +static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
>  {
>      int i, error_status_block_offset;
>  
> @@ -356,12 +356,15 @@ static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
>  }
>  
>  /* Build Hardware Error Source Table */
> -void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
> +void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
> +                     BIOSLinker *linker,
>                       const char *oem_id, const char *oem_table_id)
>  {
>      AcpiTable table = { .sig = "HEST", .rev = 1,
>                          .oem_id = oem_id, .oem_table_id = oem_table_id };
>  
> +    build_ghes_error_table(hardware_errors, linker);
> +
>      acpi_table_begin(&table, table_data);
>  
>      /* Error Source Count */
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index f76fb117adff..bafd9a56c217 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -943,10 +943,9 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
>      build_dbg2(tables_blob, tables->linker, vms);
>  
>      if (vms->ras) {
> -        build_ghes_error_table(tables->hardware_errors, tables->linker);
>          acpi_add_table(table_offsets, tables_blob);
> -        acpi_build_hest(tables_blob, tables->linker, vms->oem_id,
> -                        vms->oem_table_id);
> +        acpi_build_hest(tables_blob, tables->hardware_errors, tables->linker,
> +                        vms->oem_id, vms->oem_table_id);
>      }
>  
>      if (ms->numa_state->num_nodes > 0) {
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 59e3b8fb24b9..20016c226d1f 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -68,8 +68,8 @@ typedef struct AcpiGhesState {
>      bool present; /* True if GHES is present at all on this board */
>  } AcpiGhesState;
>  
> -void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker);
> -void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
> +void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
> +                     BIOSLinker *linker,
>                       const char *oem_id, const char *oem_table_id);
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
>                            GArray *hardware_errors);

[PATCH v2 04/15] acpi/ghes: better handle source_id and notification

[Mauro Carvalho Chehab]

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.

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

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

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.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@kernel.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);
 }
-- 
2.46.0

Re: [PATCH v2 04/15] acpi/ghes: better handle source_id and notification

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:41 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.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@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.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@kernel.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);
>  }

[PATCH v2 05/15] acpi/ghes: Fix acpi_ghes_record_errors() argument

[Mauro Carvalho Chehab]

Align the header file with the actual implementation of
this function, as the first argument is source ID and not
notification type.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

---

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@kernel.org>
---
 include/hw/acpi/ghes.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 20016c226d1f..50e3a25ea384 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -73,7 +73,7 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
-int acpi_ghes_record_errors(uint8_t notify, uint64_t error_physical_addr);
+int acpi_ghes_record_errors(uint8_t source_id, uint64_t error_physical_addr);
 
 /**
  * acpi_ghes_present: Report whether ACPI GHES table is present
-- 
2.46.0

Re: [PATCH v2 05/15] acpi/ghes: Fix acpi_ghes_record_errors() argument

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:42 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Align the header file with the actual implementation of
> this function, as the first argument is source ID and not
> notification type.
> 
> 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>

> 
> ---
> 
> 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@kernel.org>
> ---
>  include/hw/acpi/ghes.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 20016c226d1f..50e3a25ea384 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -73,7 +73,7 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                       const char *oem_id, const char *oem_table_id);
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
>                            GArray *hardware_errors);
> -int acpi_ghes_record_errors(uint8_t notify, uint64_t error_physical_addr);
> +int acpi_ghes_record_errors(uint8_t source_id, uint64_t error_physical_addr);
>  
>  /**
>   * acpi_ghes_present: Report whether ACPI GHES table is present

[PATCH v2 06/15] acpi/ghes: Remove a duplicated out of bounds check

[Mauro Carvalho Chehab]

acpi_ghes_record_errors() has an assert() at the beginning
to ensure that source_id will be lower than
ACPI_GHES_ERROR_SOURCE_COUNT. Remove a duplicated check.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 29cd7e4d8171..5f67322bf0f2 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -404,9 +404,7 @@ int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
         return -1;
     }
 
-    if (source_id < ACPI_GHES_ERROR_SOURCE_COUNT) {
-        start_addr += source_id * sizeof(uint64_t);
-    }
+    start_addr += source_id * sizeof(uint64_t);
 
     cpu_physical_memory_read(start_addr, &error_block_addr,
                              sizeof(error_block_addr));
-- 
2.46.0

[PATCH v2 07/15] acpi/ghes: Change the type for source_id

[Mauro Carvalho Chehab]

HEST source ID is actually a 16-bit value

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes-stub.c    | 2 +-
 hw/acpi/ghes.c         | 2 +-
 include/hw/acpi/ghes.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/acpi/ghes-stub.c b/hw/acpi/ghes-stub.c
index c315de1802d6..2b64cbd2819a 100644
--- a/hw/acpi/ghes-stub.c
+++ b/hw/acpi/ghes-stub.c
@@ -11,7 +11,7 @@
 #include "qemu/osdep.h"
 #include "hw/acpi/ghes.h"
 
-int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
+int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
 {
     return -1;
 }
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 5f67322bf0f2..edc74c38bf8a 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -383,7 +383,7 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
     ags->present = true;
 }
 
-int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
+int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
 {
     uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
     uint64_t start_addr;
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 50e3a25ea384..9295e46be25e 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -73,7 +73,7 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
-int acpi_ghes_record_errors(uint8_t source_id, uint64_t error_physical_addr);
+int acpi_ghes_record_errors(uint16_t source_id, uint64_t error_physical_addr);
 
 /**
  * acpi_ghes_present: Report whether ACPI GHES table is present
-- 
2.46.0

Re: [PATCH v2 07/15] acpi/ghes: Change the type for source_id

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:44 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> HEST source ID is actually a 16-bit value

add here spec/ver/chapter/table reference as a confirmation
of above statement.

> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  hw/acpi/ghes-stub.c    | 2 +-
>  hw/acpi/ghes.c         | 2 +-
>  include/hw/acpi/ghes.h | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/acpi/ghes-stub.c b/hw/acpi/ghes-stub.c
> index c315de1802d6..2b64cbd2819a 100644
> --- a/hw/acpi/ghes-stub.c
> +++ b/hw/acpi/ghes-stub.c
> @@ -11,7 +11,7 @@
>  #include "qemu/osdep.h"
>  #include "hw/acpi/ghes.h"
>  
> -int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
> +int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
>  {
>      return -1;
>  }
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 5f67322bf0f2..edc74c38bf8a 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -383,7 +383,7 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
>      ags->present = true;
>  }
>  
> -int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
> +int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
>  {
>      uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
>      uint64_t start_addr;
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 50e3a25ea384..9295e46be25e 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -73,7 +73,7 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                       const char *oem_id, const char *oem_table_id);
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
>                            GArray *hardware_errors);
> -int acpi_ghes_record_errors(uint8_t source_id, uint64_t error_physical_addr);
> +int acpi_ghes_record_errors(uint16_t source_id, uint64_t error_physical_addr);
>  
>  /**
>   * acpi_ghes_present: Report whether ACPI GHES table is present

[PATCH v2 08/15] acpi/ghes: Prepare to support multiple sources on ghes

[Mauro Carvalho Chehab]

The current code is actually dependent on having just one
error structure with a single source.

As the number of sources should be arch-dependent, as it
will depend on what kind of synchronous/assynchronous
notifications will exist, change the logic to dynamically
build the table.

Yet, for a proper support, we need to get the number of
sources by reading the number from the HEST table. However,
bios currently doesn't store a pointer to it.

For now just change the logic at table build time, while
enforcing that it will behave like before with a single
source ID.

A future patch will add a HEST table bios pointer and
change the logic at acpi_ghes_record_errors() to
dynamically use the new size.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c           | 65 ++++++++++++++++++++++++----------------
 hw/arm/virt-acpi-build.c |  5 ++++
 include/hw/acpi/ghes.h   | 21 ++++++++-----
 3 files changed, 59 insertions(+), 32 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index edc74c38bf8a..f3d0283beb3b 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -233,17 +233,26 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address,
  * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
  * See docs/specs/acpi_hest_ghes.rst for blobs format.
  */
-static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
+static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
+                                   int num_sources)
 {
     int i, error_status_block_offset;
 
+    /*
+     * TODO: Current version supports only one source.
+     * A further patch will drop this check, after adding a proper migration
+     * code, as, for the code to work, we need to store a bios pointer to the
+     * HEST table.
+     */
+    assert(num_sources == 1);
+
     /* Build error_block_address */
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
     }
 
     /* Build read_ack_register */
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         /*
          * Initialize the value of read_ack_register to 1, so GHES can be
          * writable after (re)boot.
@@ -258,13 +267,13 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
 
     /* Reserve space for Error Status Data Block */
     acpi_data_push(hardware_errors,
-        ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
+        ACPI_GHES_MAX_RAW_DATA_LENGTH * num_sources);
 
     /* Tell guest firmware to place hardware_errors blob into RAM */
     bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
                              hardware_errors, sizeof(uint64_t), false);
 
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         /*
          * Tell firmware to patch error_block_address entries to point to
          * corresponding "Generic Error Status Block"
@@ -286,10 +295,12 @@ 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,
                           BIOSLinker *linker,
-                          enum AcpiGhesNotifyType notify,
-                          uint16_t source_id)
+                          const AcpiNotificationSourceId *notif_src,
+                          uint16_t index, int num_sources)
 {
     uint64_t address_offset;
+    const uint16_t notify = notif_src->notify;
+    const uint16_t source_id = notif_src->source_id;
 
     /*
      * Type:
@@ -318,7 +329,7 @@ static void build_ghes_v2(GArray *table_data,
                      4 /* QWord access */, 0);
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
         address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
-        ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
+        ACPI_GHES_ERRORS_FW_CFG_FILE, index * sizeof(uint64_t));
 
     /* Notification Structure */
     build_ghes_hw_error_notification(table_data, notify);
@@ -335,9 +346,10 @@ static void build_ghes_v2(GArray *table_data,
     build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
                      4 /* QWord access */, 0);
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
-        address_offset + GAS_ADDR_OFFSET,
-        sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
-        (ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t));
+                                   address_offset + GAS_ADDR_OFFSET,
+                                   sizeof(uint64_t),
+                                   ACPI_GHES_ERRORS_FW_CFG_FILE,
+                                   (num_sources + index) * sizeof(uint64_t));
 
     /*
      * Read Ack Preserve field
@@ -352,19 +364,23 @@ static void build_ghes_v2(GArray *table_data,
 /* Build Hardware Error Source Table */
 void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      BIOSLinker *linker,
+                     const AcpiNotificationSourceId * const notif_source,
+                     int num_sources,
                      const char *oem_id, const char *oem_table_id)
 {
     AcpiTable table = { .sig = "HEST", .rev = 1,
                         .oem_id = oem_id, .oem_table_id = oem_table_id };
+    int i;
 
-    build_ghes_error_table(hardware_errors, linker);
+    build_ghes_error_table(hardware_errors, linker, num_sources);
 
     acpi_table_begin(&table, table_data);
 
     /* Error Source Count */
-    build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
-    build_ghes_v2(table_data, linker,
-                  ACPI_GHES_NOTIFY_SEA, ACPI_HEST_SRC_ID_SEA);
+    build_append_int_noprefix(table_data, num_sources, 4);
+    for (i = 0; i < num_sources; i++) {
+        build_ghes_v2(table_data, linker, &notif_source[i], i, num_sources);
+    }
 
     acpi_table_end(linker, &table);
 }
@@ -391,28 +407,27 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
     AcpiGedState *acpi_ged_state;
     AcpiGhesState *ags;
 
-    assert(source_id < ACPI_GHES_ERROR_SOURCE_COUNT);
-
     acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
                                                        NULL));
     g_assert(acpi_ged_state);
     ags = &acpi_ged_state->ghes_state;
 
+    /*
+     * Current version supports only one source, as assured during table build,
+     * so no need to change the start offset based on the source ID.
+     */
     start_addr = le64_to_cpu(ags->ghes_addr_le);
 
-    if (!physical_address) {
-        return -1;
-    }
-
-    start_addr += source_id * sizeof(uint64_t);
-
     cpu_physical_memory_read(start_addr, &error_block_addr,
                              sizeof(error_block_addr));
 
     error_block_addr = le64_to_cpu(error_block_addr);
 
-    read_ack_register_addr = start_addr +
-                             ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
+    /*
+     * As the current version supports only one source, the ack offset is
+     * just sizeof(uint64_t).
+     */
+    read_ack_register_addr = start_addr + sizeof(uint64_t);
 
     cpu_physical_memory_read(read_ack_register_addr,
                              &read_ack_register, sizeof(read_ack_register));
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index bafd9a56c217..476c365851c4 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -890,6 +890,10 @@ static void acpi_align_size(GArray *blob, unsigned align)
     g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
 }
 
+static const AcpiNotificationSourceId hest_ghes_notify[] = {
+    {ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA},
+};
+
 static
 void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
 {
@@ -945,6 +949,7 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
     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);
     }
 
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 9295e46be25e..d6e2801d9cd9 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -56,20 +56,27 @@ enum AcpiGhesNotifyType {
     ACPI_GHES_NOTIFY_RESERVED = 12
 };
 
-enum {
-    ACPI_HEST_SRC_ID_SEA = 0,
-    /* future ids go here */
-
-    ACPI_GHES_ERROR_SOURCE_COUNT
-};
-
 typedef struct AcpiGhesState {
     uint64_t ghes_addr_le;
     bool present; /* True if GHES is present at all on this board */
 } AcpiGhesState;
 
+/*
+ * ID numbers used to fill HEST source ID field
+ */
+enum AcpiGhesSourceID {
+    ACPI_HEST_SRC_ID_SYNC,
+};
+
+typedef struct AcpiNotificationSourceId {
+    enum AcpiGhesSourceID source_id;
+    enum AcpiGhesNotifyType notify;
+} AcpiNotificationSourceId;
+
 void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      BIOSLinker *linker,
+                     const AcpiNotificationSourceId * const notif_source,
+                     int num_sources,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
-- 
2.46.0

Re: [PATCH v2 08/15] acpi/ghes: Prepare to support multiple sources on ghes

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:45 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> The current code is actually dependent on having just one
> error structure with a single source.
> 
> As the number of sources should be arch-dependent, as it
> will depend on what kind of synchronous/assynchronous
> notifications will exist, change the logic to dynamically
> build the table.
> 
> Yet, for a proper support, we need to get the number of
> sources by reading the number from the HEST table. However,
> bios currently doesn't store a pointer to it.
> 
> For now just change the logic at table build time, while
> enforcing that it will behave like before with a single
> source ID.
> 
> A future patch will add a HEST table bios pointer and
> change the logic at acpi_ghes_record_errors() to
> dynamically use the new size.


above description strongly hints that patch does not belong to cleanups,
I suggest to move it to HEST series.

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  hw/acpi/ghes.c           | 65 ++++++++++++++++++++++++----------------
>  hw/arm/virt-acpi-build.c |  5 ++++
>  include/hw/acpi/ghes.h   | 21 ++++++++-----
>  3 files changed, 59 insertions(+), 32 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index edc74c38bf8a..f3d0283beb3b 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -233,17 +233,26 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address,
>   * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
>   * See docs/specs/acpi_hest_ghes.rst for blobs format.
>   */
> -static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
> +static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
> +                                   int num_sources)
>  {
>      int i, error_status_block_offset;
>  
> +    /*
> +     * TODO: Current version supports only one source.
> +     * A further patch will drop this check, after adding a proper migration
> +     * code, as, for the code to work, we need to store a bios pointer to the
> +     * HEST table.
> +     */
> +    assert(num_sources == 1);
> +
>      /* Build error_block_address */
> -    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
> +    for (i = 0; i < num_sources; i++) {
>          build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
>      }
>  
>      /* Build read_ack_register */
> -    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
> +    for (i = 0; i < num_sources; i++) {
>          /*
>           * Initialize the value of read_ack_register to 1, so GHES can be
>           * writable after (re)boot.
> @@ -258,13 +267,13 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
>  
>      /* Reserve space for Error Status Data Block */
>      acpi_data_push(hardware_errors,
> -        ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
> +        ACPI_GHES_MAX_RAW_DATA_LENGTH * num_sources);
>  
>      /* Tell guest firmware to place hardware_errors blob into RAM */
>      bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
>                               hardware_errors, sizeof(uint64_t), false);
>  
> -    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
> +    for (i = 0; i < num_sources; i++) {
>          /*
>           * Tell firmware to patch error_block_address entries to point to
>           * corresponding "Generic Error Status Block"
> @@ -286,10 +295,12 @@ 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,
>                            BIOSLinker *linker,
> -                          enum AcpiGhesNotifyType notify,
> -                          uint16_t source_id)
> +                          const AcpiNotificationSourceId *notif_src,
> +                          uint16_t index, int num_sources)
>  {
>      uint64_t address_offset;
> +    const uint16_t notify = notif_src->notify;
> +    const uint16_t source_id = notif_src->source_id;
>  
>      /*
>       * Type:
> @@ -318,7 +329,7 @@ static void build_ghes_v2(GArray *table_data,
>                       4 /* QWord access */, 0);
>      bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
>          address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
> -        ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
> +        ACPI_GHES_ERRORS_FW_CFG_FILE, index * sizeof(uint64_t));
>  
>      /* Notification Structure */
>      build_ghes_hw_error_notification(table_data, notify);
> @@ -335,9 +346,10 @@ static void build_ghes_v2(GArray *table_data,
>      build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
>                       4 /* QWord access */, 0);
>      bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
> -        address_offset + GAS_ADDR_OFFSET,
> -        sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
> -        (ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t));
> +                                   address_offset + GAS_ADDR_OFFSET,
> +                                   sizeof(uint64_t),
> +                                   ACPI_GHES_ERRORS_FW_CFG_FILE,
> +                                   (num_sources + index) * sizeof(uint64_t));
>  
>      /*
>       * Read Ack Preserve field
> @@ -352,19 +364,23 @@ static void build_ghes_v2(GArray *table_data,
>  /* Build Hardware Error Source Table */
>  void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                       BIOSLinker *linker,
> +                     const AcpiNotificationSourceId * const notif_source,
> +                     int num_sources,
>                       const char *oem_id, const char *oem_table_id)
>  {
>      AcpiTable table = { .sig = "HEST", .rev = 1,
>                          .oem_id = oem_id, .oem_table_id = oem_table_id };
> +    int i;
>  
> -    build_ghes_error_table(hardware_errors, linker);
> +    build_ghes_error_table(hardware_errors, linker, num_sources);
>  
>      acpi_table_begin(&table, table_data);
>  
>      /* Error Source Count */
> -    build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
> -    build_ghes_v2(table_data, linker,
> -                  ACPI_GHES_NOTIFY_SEA, ACPI_HEST_SRC_ID_SEA);
> +    build_append_int_noprefix(table_data, num_sources, 4);
> +    for (i = 0; i < num_sources; i++) {
> +        build_ghes_v2(table_data, linker, &notif_source[i], i, num_sources);
> +    }
>  
>      acpi_table_end(linker, &table);
>  }


> @@ -391,28 +407,27 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
>      AcpiGedState *acpi_ged_state;
>      AcpiGhesState *ags;
>  
> -    assert(source_id < ACPI_GHES_ERROR_SOURCE_COUNT);
> -
>      acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
>                                                         NULL));
>      g_assert(acpi_ged_state);
>      ags = &acpi_ged_state->ghes_state;
>  
> +    /*
> +     * Current version supports only one source, as assured during table build,
> +     * so no need to change the start offset based on the source ID.
> +     */
>      start_addr = le64_to_cpu(ags->ghes_addr_le);
>  
> -    if (!physical_address) {
> -        return -1;
> -    }
> -
> -    start_addr += source_id * sizeof(uint64_t);
> -
>      cpu_physical_memory_read(start_addr, &error_block_addr,
>                               sizeof(error_block_addr));
>  
>      error_block_addr = le64_to_cpu(error_block_addr);
>  
> -    read_ack_register_addr = start_addr +
> -                             ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
> +    /*
> +     * As the current version supports only one source, the ack offset is
> +     * just sizeof(uint64_t).
> +     */
> +    read_ack_register_addr = start_addr + sizeof(uint64_t);
>  
>      cpu_physical_memory_read(read_ack_register_addr,
>                               &read_ack_register, sizeof(read_ack_register));

above hunk looks like a separate change.
Namely dumb-ing down current impl. to fit reality.
(which I would keep in cleanups series)

> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index bafd9a56c217..476c365851c4 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -890,6 +890,10 @@ static void acpi_align_size(GArray *blob, unsigned align)
>      g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
>  }
>  
> +static const AcpiNotificationSourceId hest_ghes_notify[] = {
> +    {ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA},
> +};
> +
>  static
>  void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
>  {
> @@ -945,6 +949,7 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
>      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);
>      }
>  
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 9295e46be25e..d6e2801d9cd9 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -56,20 +56,27 @@ enum AcpiGhesNotifyType {
>      ACPI_GHES_NOTIFY_RESERVED = 12
>  };
>  
> -enum {
> -    ACPI_HEST_SRC_ID_SEA = 0,
> -    /* future ids go here */
> -
> -    ACPI_GHES_ERROR_SOURCE_COUNT
> -};
> -
>  typedef struct AcpiGhesState {
>      uint64_t ghes_addr_le;
>      bool present; /* True if GHES is present at all on this board */
>  } AcpiGhesState;
>  
> +/*
> + * ID numbers used to fill HEST source ID field
> + */
> +enum AcpiGhesSourceID {
> +    ACPI_HEST_SRC_ID_SYNC,
> +};
> +
> +typedef struct AcpiNotificationSourceId {

maybe s/AcpiNotification/AcpiHESTNotification

> +    enum AcpiGhesSourceID source_id;
> +    enum AcpiGhesNotifyType notify;
are above really only GHES specific?


> +} AcpiNotificationSourceId;
> +
>  void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                       BIOSLinker *linker,
> +                     const AcpiNotificationSourceId * const notif_source,
> +                     int num_sources,
>                       const char *oem_id, const char *oem_table_id);
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
>                            GArray *hardware_errors);

[PATCH v2 09/15] acpi/ghes: make the GHES record generation more generic

[Mauro Carvalho Chehab]

Split the code into separate functions to allow using the
common CPER filling code by different error sources.

The generic code was moved to ghes_record_cper_errors(),
and ghes_gen_err_data_uncorrectable_recoverable() now contains
only a logic to fill GEGB part of the record.

The remaining code to generate a memory error now belongs to
acpi_ghes_record_errors() function.

A further patch will give it a better name.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 hw/acpi/ghes.c         | 118 +++++++++++++++++++++++++----------------
 include/hw/acpi/ghes.h |   3 ++
 2 files changed, 74 insertions(+), 47 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index f3d0283beb3b..628fa9b22f4b 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -181,51 +181,30 @@ static void acpi_ghes_build_append_mem_cper(GArray *table,
     build_append_int_noprefix(table, 0, 7);
 }
 
-static int acpi_ghes_record_mem_error(uint64_t error_block_address,
-                                      uint64_t error_physical_addr)
+static void
+ghes_gen_err_data_uncorrectable_recoverable(GArray *block,
+                                            const uint8_t *section_type,
+                                            int data_length)
 {
-    GArray *block;
-
-    /* Memory Error Section Type */
-    const uint8_t uefi_cper_mem_sec[] =
-          UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
-                  0xED, 0x7C, 0x83, 0xB1);
-
     /* invalid fru id: ACPI 4.0: 17.3.2.6.1 Generic Error Data,
      * Table 17-13 Generic Error Data Entry
      */
     QemuUUID fru_id = {};
-    uint32_t data_length;
 
-    block = g_array_new(false, true /* clear */, 1);
-
-    /* This is the length if adding a new generic error data entry*/
-    data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH;
     /*
-     * It should not run out of the preallocated memory if adding a new generic
-     * error data entry
+     * Calculate the size with this block. No need to check for
+     * too big CPER, as CPER size is checked at ghes_record_cper_errors()
      */
-    assert((data_length + ACPI_GHES_GESB_SIZE) <=
-            ACPI_GHES_MAX_RAW_DATA_LENGTH);
+    data_length += ACPI_GHES_GESB_SIZE;
 
     /* Build the new generic error status block header */
     acpi_ghes_generic_error_status(block, ACPI_GEBS_UNCORRECTABLE,
         0, 0, data_length, ACPI_CPER_SEV_RECOVERABLE);
 
     /* Build this new generic error data entry header */
-    acpi_ghes_generic_error_data(block, uefi_cper_mem_sec,
+    acpi_ghes_generic_error_data(block, section_type,
         ACPI_CPER_SEV_RECOVERABLE, 0, 0,
         ACPI_GHES_MEM_CPER_LENGTH, fru_id, 0);
-
-    /* Build the memory section CPER for above new generic error data entry */
-    acpi_ghes_build_append_mem_cper(block, error_physical_addr);
-
-    /* Write the generic error data entry into guest memory */
-    cpu_physical_memory_write(error_block_address, block->data, block->len);
-
-    g_array_free(block, true);
-
-    return 0;
 }
 
 /*
@@ -399,14 +378,19 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
     ags->present = true;
 }
 
-int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
+void ghes_record_cper_errors(const void *cper, size_t len,
+                             uint16_t source_id, Error **errp)
 {
     uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
     uint64_t start_addr;
-    bool ret = -1;
     AcpiGedState *acpi_ged_state;
     AcpiGhesState *ags;
 
+    if (len > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
+        error_setg(errp, "GHES CPER record is too big: %ld", len);
+        return;
+    }
+
     acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
                                                        NULL));
     g_assert(acpi_ged_state);
@@ -422,6 +406,10 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
                              sizeof(error_block_addr));
 
     error_block_addr = le64_to_cpu(error_block_addr);
+    if (!error_block_addr) {
+        error_setg(errp, "can not find Generic Error Status Block");
+        return;
+    }
 
     /*
      * As the current version supports only one source, the ack offset is
@@ -434,24 +422,60 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
 
     /* zero means OSPM does not acknowledge the error */
     if (!read_ack_register) {
-        error_report("OSPM does not acknowledge previous error,"
-                     " so can not record CPER for current error anymore");
-    } else if (error_block_addr) {
-        read_ack_register = cpu_to_le64(0);
-        /*
-         * Clear the Read Ack Register, OSPM will write it to 1 when
-         * it acknowledges this error.
-         */
-        cpu_physical_memory_write(read_ack_register_addr,
-                                  &read_ack_register, sizeof(uint64_t));
-
-        ret = acpi_ghes_record_mem_error(error_block_addr,
-                                         physical_address);
-    } else {
-        error_report("can not find Generic Error Status Block");
+        error_setg(errp,
+                   "OSPM does not acknowledge previous error,"
+                   " so can not record CPER for current error anymore");
+        return;
     }
 
-    return ret;
+    read_ack_register = cpu_to_le64(0);
+    /*
+        * Clear the Read Ack Register, OSPM will write it to 1 when
+        * it acknowledges this error.
+        */
+    cpu_physical_memory_write(read_ack_register_addr,
+        &read_ack_register, sizeof(uint64_t));
+
+    /* Write the generic error data entry into guest memory */
+    cpu_physical_memory_write(error_block_addr, cper, len);
+
+    return;
+}
+
+int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
+{
+    /* Memory Error Section Type */
+    const uint8_t guid[] =
+          UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
+                  0xED, 0x7C, 0x83, 0xB1);
+    Error *errp = NULL;
+    GArray *block;
+
+    if (!physical_address) {
+        error_report("can not find Generic Error Status Block for source id %d",
+                     source_id);
+        return -1;
+    }
+
+    block = g_array_new(false, true /* clear */, 1);
+
+    ghes_gen_err_data_uncorrectable_recoverable(block, guid,
+                                                ACPI_GHES_MAX_RAW_DATA_LENGTH);
+
+    /* Build the memory section CPER for above new generic error data entry */
+    acpi_ghes_build_append_mem_cper(block, physical_address);
+
+    /* Report the error */
+    ghes_record_cper_errors(block->data, block->len, source_id, &errp);
+
+    g_array_free(block, true);
+
+    if (errp) {
+        error_report_err(errp);
+        return -1;
+    }
+
+    return 0;
 }
 
 bool acpi_ghes_present(void)
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index d6e2801d9cd9..1b988ac1e2f2 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -23,6 +23,7 @@
 #define ACPI_GHES_H
 
 #include "hw/acpi/bios-linker-loader.h"
+#include "qapi/error.h"
 
 /*
  * Values for Hardware Error Notification Type field
@@ -80,6 +81,8 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
+void ghes_record_cper_errors(const void *cper, size_t len,
+                             uint16_t source_id, Error **errp);
 int acpi_ghes_record_errors(uint16_t source_id, uint64_t error_physical_addr);
 
 /**
-- 
2.46.0

Re: [PATCH v2 09/15] acpi/ghes: make the GHES record generation more generic

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:46 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Split the code into separate functions to allow using the
> common CPER filling code by different error sources.
> 
> The generic code was moved to ghes_record_cper_errors(),
> and ghes_gen_err_data_uncorrectable_recoverable() now contains
> only a logic to fill GEGB part of the record.
> 
> The remaining code to generate a memory error now belongs to
> acpi_ghes_record_errors() function.
> 
> A further patch will give it a better name.

checkpatch is not happy with you.

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  hw/acpi/ghes.c         | 118 +++++++++++++++++++++++++----------------
>  include/hw/acpi/ghes.h |   3 ++
>  2 files changed, 74 insertions(+), 47 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index f3d0283beb3b..628fa9b22f4b 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -181,51 +181,30 @@ static void acpi_ghes_build_append_mem_cper(GArray *table,
>      build_append_int_noprefix(table, 0, 7);
>  }
>  
> -static int acpi_ghes_record_mem_error(uint64_t error_block_address,
> -                                      uint64_t error_physical_addr)
> +static void
> +ghes_gen_err_data_uncorrectable_recoverable(GArray *block,
> +                                            const uint8_t *section_type,
> +                                            int data_length)
>  {
> -    GArray *block;
> -
> -    /* Memory Error Section Type */
> -    const uint8_t uefi_cper_mem_sec[] =
> -          UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
> -                  0xED, 0x7C, 0x83, 0xB1);
> -
>      /* invalid fru id: ACPI 4.0: 17.3.2.6.1 Generic Error Data,
>       * Table 17-13 Generic Error Data Entry
>       */
>      QemuUUID fru_id = {};
> -    uint32_t data_length;
>  
> -    block = g_array_new(false, true /* clear */, 1);
> -
> -    /* This is the length if adding a new generic error data entry*/
> -    data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH;
>      /*
> -     * It should not run out of the preallocated memory if adding a new generic
> -     * error data entry
> +     * Calculate the size with this block. No need to check for
> +     * too big CPER, as CPER size is checked at ghes_record_cper_errors()
>       */
> -    assert((data_length + ACPI_GHES_GESB_SIZE) <=
> -            ACPI_GHES_MAX_RAW_DATA_LENGTH);
> +    data_length += ACPI_GHES_GESB_SIZE;
>  
>      /* Build the new generic error status block header */
>      acpi_ghes_generic_error_status(block, ACPI_GEBS_UNCORRECTABLE,
>          0, 0, data_length, ACPI_CPER_SEV_RECOVERABLE);
>  
>      /* Build this new generic error data entry header */
> -    acpi_ghes_generic_error_data(block, uefi_cper_mem_sec,
> +    acpi_ghes_generic_error_data(block, section_type,
>          ACPI_CPER_SEV_RECOVERABLE, 0, 0,
>          ACPI_GHES_MEM_CPER_LENGTH, fru_id, 0);
> -
> -    /* Build the memory section CPER for above new generic error data entry */
> -    acpi_ghes_build_append_mem_cper(block, error_physical_addr);
> -
> -    /* Write the generic error data entry into guest memory */
> -    cpu_physical_memory_write(error_block_address, block->data, block->len);
> -
> -    g_array_free(block, true);
> -
> -    return 0;
>  }
>  
>  /*
> @@ -399,14 +378,19 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
>      ags->present = true;
>  }
>  
> -int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
> +void ghes_record_cper_errors(const void *cper, size_t len,
> +                             uint16_t source_id, Error **errp)
>  {
>      uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
>      uint64_t start_addr;
> -    bool ret = -1;
>      AcpiGedState *acpi_ged_state;
>      AcpiGhesState *ags;
>  
> +    if (len > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
> +        error_setg(errp, "GHES CPER record is too big: %ld", len);
> +        return;
> +    }
> +
>      acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
>                                                         NULL));
>      g_assert(acpi_ged_state);
> @@ -422,6 +406,10 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
>                               sizeof(error_block_addr));
>  
>      error_block_addr = le64_to_cpu(error_block_addr);
> +    if (!error_block_addr) {
> +        error_setg(errp, "can not find Generic Error Status Block");
> +        return;
> +    }
>  
>      /*
>       * As the current version supports only one source, the ack offset is


> @@ -434,24 +422,60 @@ int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
>  
>      /* zero means OSPM does not acknowledge the error */
>      if (!read_ack_register) {
> -        error_report("OSPM does not acknowledge previous error,"
> -                     " so can not record CPER for current error anymore");
> -    } else if (error_block_addr) {
> -        read_ack_register = cpu_to_le64(0);
> -        /*
> -         * Clear the Read Ack Register, OSPM will write it to 1 when
> -         * it acknowledges this error.
> -         */
> -        cpu_physical_memory_write(read_ack_register_addr,
> -                                  &read_ack_register, sizeof(uint64_t));
> -
> -        ret = acpi_ghes_record_mem_error(error_block_addr,
> -                                         physical_address);
> -    } else {
> -        error_report("can not find Generic Error Status Block");
> +        error_setg(errp,
> +                   "OSPM does not acknowledge previous error,"
> +                   " so can not record CPER for current error anymore");
> +        return;
>      }
>  
> -    return ret;
> +    read_ack_register = cpu_to_le64(0);
> +    /*
> +        * Clear the Read Ack Register, OSPM will write it to 1 when
> +        * it acknowledges this error.
> +        */
> +    cpu_physical_memory_write(read_ack_register_addr,
> +        &read_ack_register, sizeof(uint64_t));
> +
> +    /* Write the generic error data entry into guest memory */
> +    cpu_physical_memory_write(error_block_addr, cper, len);
> +
> +    return;
> +}

this hunk is 'reduce indent' mostly, so do that in separate patch 1st.


> +
> +int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
> +{
> +    /* Memory Error Section Type */
> +    const uint8_t guid[] =
> +          UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
> +                  0xED, 0x7C, 0x83, 0xB1);
> +    Error *errp = NULL;
> +    GArray *block;
> +
> +    if (!physical_address) {
> +        error_report("can not find Generic Error Status Block for source id %d",
> +                     source_id);
> +        return -1;
> +    }
> +
> +    block = g_array_new(false, true /* clear */, 1);
> +
> +    ghes_gen_err_data_uncorrectable_recoverable(block, guid,
> +                                                ACPI_GHES_MAX_RAW_DATA_LENGTH);
> +
> +    /* Build the memory section CPER for above new generic error data entry */
> +    acpi_ghes_build_append_mem_cper(block, physical_address);
> +
> +    /* Report the error */
> +    ghes_record_cper_errors(block->data, block->len, source_id, &errp);
> +
> +    g_array_free(block, true);
> +
> +    if (errp) {
> +        error_report_err(errp);
> +        return -1;
> +    }
> +
> +    return 0;
>  }
>  
>  bool acpi_ghes_present(void)
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index d6e2801d9cd9..1b988ac1e2f2 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -23,6 +23,7 @@
>  #define ACPI_GHES_H
>  
>  #include "hw/acpi/bios-linker-loader.h"
> +#include "qapi/error.h"
>  
>  /*
>   * Values for Hardware Error Notification Type field
> @@ -80,6 +81,8 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
>                       const char *oem_id, const char *oem_table_id);
>  void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
>                            GArray *hardware_errors);
> +void ghes_record_cper_errors(const void *cper, size_t len,
> +                             uint16_t source_id, Error **errp);
>  int acpi_ghes_record_errors(uint16_t source_id, uint64_t error_physical_addr);
>  
>  /**

[PATCH v2 10/15] acpi/ghes: move offset calculus to a separate function

[Mauro Carvalho Chehab]

Currently, CPER address location is calculated as an offset of
the hardware_errors table. It is also badly named, as the
offset actually used is the address where the CPER data starts,
and not the beginning of the error source.

Move the logic which calculates such offset to a separate
function, in preparation for a patch that will be changing the
logic to calculate it from the HEST table.

While here, properly name the variable which stores the cper
address.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c | 50 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 31 insertions(+), 19 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 628fa9b22f4b..900f1571bc97 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -378,11 +378,36 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
     ags->present = true;
 }
 
+static void get_ghes_offsets(uint64_t ghes_addr,
+                             uint64_t *cper_addr,
+                             uint64_t *read_ack_register_addr)
+{
+    if (!ghes_addr) {
+        return;
+    }
+
+    /*
+     * non-HEST version supports only one source, so no need to change
+     * the start offset based on the source ID. Also, we can't validate
+     * the source ID, as it is stored inside the HEST table.
+     */
+
+    cpu_physical_memory_read(ghes_addr, cper_addr,
+                             sizeof(*cper_addr));
+
+    *cper_addr = le64_to_cpu(*cper_addr);
+
+    /*
+     * As the current version supports only one source, the ack offset is
+     * just 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 error_block_addr, read_ack_register_addr, read_ack_register = 0;
-    uint64_t start_addr;
+    uint64_t cper_addr = 0, read_ack_register_addr = 0, read_ack_register;
     AcpiGedState *acpi_ged_state;
     AcpiGhesState *ags;
 
@@ -396,27 +421,14 @@ void ghes_record_cper_errors(const void *cper, size_t len,
     g_assert(acpi_ged_state);
     ags = &acpi_ged_state->ghes_state;
 
-    /*
-     * Current version supports only one source, as assured during table build,
-     * so no need to change the start offset based on the source ID.
-     */
-    start_addr = le64_to_cpu(ags->ghes_addr_le);
+    get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),
+                     &cper_addr, &read_ack_register_addr);
 
-    cpu_physical_memory_read(start_addr, &error_block_addr,
-                             sizeof(error_block_addr));
-
-    error_block_addr = le64_to_cpu(error_block_addr);
-    if (!error_block_addr) {
+    if (!cper_addr) {
         error_setg(errp, "can not find Generic Error Status Block");
         return;
     }
 
-    /*
-     * As the current version supports only one source, the ack offset is
-     * just sizeof(uint64_t).
-     */
-    read_ack_register_addr = start_addr + sizeof(uint64_t);
-
     cpu_physical_memory_read(read_ack_register_addr,
                              &read_ack_register, sizeof(read_ack_register));
 
@@ -437,7 +449,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
         &read_ack_register, sizeof(uint64_t));
 
     /* Write the generic error data entry into guest memory */
-    cpu_physical_memory_write(error_block_addr, cper, len);
+    cpu_physical_memory_write(cper_addr, cper, len);
 
     return;
 }
-- 
2.46.0

Re: [PATCH v2 10/15] acpi/ghes: move offset calculus to a separate function

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:47 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Currently, CPER address location is calculated as an offset of
> the hardware_errors table. It is also badly named, as the
> offset actually used is the address where the CPER data starts,
> and not the beginning of the error source.
> 
> Move the logic which calculates such offset to a separate
> function, in preparation for a patch that will be changing the
> logic to calculate it from the HEST table.
> 
> While here, properly name the variable which stores the cper
> address.

I'd move 14/15 into the beginning of the series,
so this patch would look a bit more sensible.

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  hw/acpi/ghes.c | 50 +++++++++++++++++++++++++++++++-------------------
>  1 file changed, 31 insertions(+), 19 deletions(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 628fa9b22f4b..900f1571bc97 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -378,11 +378,36 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
>      ags->present = true;
>  }
>  
> +static void get_ghes_offsets(uint64_t ghes_addr,
> +                             uint64_t *cper_addr,
> +                             uint64_t *read_ack_register_addr)
> +{
> +    if (!ghes_addr) {
> +        return;
> +    }
> +
> +    /*
> +     * non-HEST version supports only one source, so no need to change
> +     * the start offset based on the source ID. Also, we can't validate
> +     * the source ID, as it is stored inside the HEST table.
> +     */
> +
> +    cpu_physical_memory_read(ghes_addr, cper_addr,
> +                             sizeof(*cper_addr));
> +
> +    *cper_addr = le64_to_cpu(*cper_addr);
> +
> +    /*
> +     * As the current version supports only one source, the ack offset is
> +     * just 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 error_block_addr, read_ack_register_addr, read_ack_register = 0;
> -    uint64_t start_addr;
> +    uint64_t cper_addr = 0, read_ack_register_addr = 0, read_ack_register;
>      AcpiGedState *acpi_ged_state;
>      AcpiGhesState *ags;
>  
> @@ -396,27 +421,14 @@ void ghes_record_cper_errors(const void *cper, size_t len,
>      g_assert(acpi_ged_state);
>      ags = &acpi_ged_state->ghes_state;
>  
> -    /*
> -     * Current version supports only one source, as assured during table build,
> -     * so no need to change the start offset based on the source ID.
> -     */
> -    start_addr = le64_to_cpu(ags->ghes_addr_le);
> +    get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),
> +                     &cper_addr, &read_ack_register_addr);
>  
> -    cpu_physical_memory_read(start_addr, &error_block_addr,
> -                             sizeof(error_block_addr));
> -
> -    error_block_addr = le64_to_cpu(error_block_addr);
> -    if (!error_block_addr) {
> +    if (!cper_addr) {
>          error_setg(errp, "can not find Generic Error Status Block");
>          return;
>      }
>  
> -    /*
> -     * As the current version supports only one source, the ack offset is
> -     * just sizeof(uint64_t).
> -     */
> -    read_ack_register_addr = start_addr + sizeof(uint64_t);
> -
>      cpu_physical_memory_read(read_ack_register_addr,
>                               &read_ack_register, sizeof(read_ack_register));
>  
> @@ -437,7 +449,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
>          &read_ack_register, sizeof(uint64_t));
>  
>      /* Write the generic error data entry into guest memory */
> -    cpu_physical_memory_write(error_block_addr, cper, len);
> +    cpu_physical_memory_write(cper_addr, cper, len);
>  
>      return;
>  }

[PATCH v2 11/15] acpi/ghes: better name GHES memory error function

[Mauro Carvalho Chehab]

The current function used to generate GHES data is specific for
memory errors. Give a better name for it, as we now have a generic
function as well.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 hw/acpi/ghes-stub.c    | 2 +-
 hw/acpi/ghes.c         | 2 +-
 include/hw/acpi/ghes.h | 5 +++--
 target/arm/kvm.c       | 3 ++-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/hw/acpi/ghes-stub.c b/hw/acpi/ghes-stub.c
index 2b64cbd2819a..7cec1812dad9 100644
--- a/hw/acpi/ghes-stub.c
+++ b/hw/acpi/ghes-stub.c
@@ -11,7 +11,7 @@
 #include "qemu/osdep.h"
 #include "hw/acpi/ghes.h"
 
-int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
+int acpi_ghes_memory_errors(uint16_t source_id, uint64_t physical_address)
 {
     return -1;
 }
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 900f1571bc97..3af1cd16d4d7 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -454,7 +454,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
     return;
 }
 
-int acpi_ghes_record_errors(uint16_t source_id, uint64_t physical_address)
+int acpi_ghes_memory_errors(uint16_t source_id, uint64_t physical_address)
 {
     /* Memory Error Section Type */
     const uint8_t guid[] =
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 1b988ac1e2f2..051a9322141f 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -81,15 +81,16 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
+int acpi_ghes_memory_errors(uint16_t source_id,
+                            uint64_t error_physical_addr);
 void ghes_record_cper_errors(const void *cper, size_t len,
                              uint16_t source_id, Error **errp);
-int acpi_ghes_record_errors(uint16_t source_id, uint64_t error_physical_addr);
 
 /**
  * acpi_ghes_present: Report whether ACPI GHES table is present
  *
  * Returns: true if the system has an ACPI GHES table and it is
- * safe to call acpi_ghes_record_errors() to record a memory error.
+ * safe to call acpi_ghes_memory_errors() to record a memory error.
  */
 bool acpi_ghes_present(void);
 #endif
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 849e2e21b304..63419b87e8c6 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -2373,7 +2373,8 @@ void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
              */
             if (code == BUS_MCEERR_AR) {
                 kvm_cpu_synchronize_state(c);
-                if (!acpi_ghes_record_errors(ACPI_HEST_SRC_ID_SEA, paddr)) {
+                if (!acpi_ghes_memory_errors(ACPI_HEST_SRC_ID_SEA,
+                                             paddr)) {
                     kvm_inject_arm_sea(c);
                 } else {
                     error_report("failed to record the error");
-- 
2.46.0

[PATCH v2 12/15] acpi/ghes: don't crash QEMU if ghes GED is not found

[Mauro Carvalho Chehab]

Instead, produce an error and continue working

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 hw/acpi/ghes.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 3af1cd16d4d7..209095f67e9a 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -418,7 +418,10 @@ void ghes_record_cper_errors(const void *cper, size_t len,
 
     acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
                                                        NULL));
-    g_assert(acpi_ged_state);
+    if (!acpi_ged_state) {
+        error_setg(errp, "Can't find ACPI_GED object");
+        return;
+    }
     ags = &acpi_ged_state->ghes_state;
 
     get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),
-- 
2.46.0

Re: [PATCH v2 12/15] acpi/ghes: don't crash QEMU if ghes GED is not found

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:49 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Instead, produce an error and continue working

s/^^^^/make error handling within ... consistent, i.e. instead abort just print a error in case ... /


> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  hw/acpi/ghes.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 3af1cd16d4d7..209095f67e9a 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -418,7 +418,10 @@ void ghes_record_cper_errors(const void *cper, size_t len,
>  
>      acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
>                                                         NULL));
> -    g_assert(acpi_ged_state);
> +    if (!acpi_ged_state) {
> +        error_setg(errp, "Can't find ACPI_GED object");
> +        return;
> +    }
>      ags = &acpi_ged_state->ghes_state;
>  
>      get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),

[PATCH v2 13/15] acpi/ghes: rename etc/hardware_error file macros

[Mauro Carvalho Chehab]

Now that we have also have a file to store HEST data location,
which is part of GHES, better name the file where CPER records
are stored.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/ghes.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 209095f67e9a..3d03506fdaf8 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -28,8 +28,8 @@
 #include "hw/nvram/fw_cfg.h"
 #include "qemu/uuid.h"
 
-#define ACPI_GHES_ERRORS_FW_CFG_FILE        "etc/hardware_errors"
-#define ACPI_GHES_DATA_ADDR_FW_CFG_FILE     "etc/hardware_errors_addr"
+#define ACPI_HW_ERROR_FW_CFG_FILE           "etc/hardware_errors"
+#define ACPI_HW_ERROR_ADDR_FW_CFG_FILE      "etc/hardware_errors_addr"
 
 /* The max size in bytes for one error block */
 #define ACPI_GHES_MAX_RAW_DATA_LENGTH   (1 * KiB)
@@ -249,7 +249,7 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
         ACPI_GHES_MAX_RAW_DATA_LENGTH * num_sources);
 
     /* Tell guest firmware to place hardware_errors blob into RAM */
-    bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
+    bios_linker_loader_alloc(linker, ACPI_HW_ERROR_FW_CFG_FILE,
                              hardware_errors, sizeof(uint64_t), false);
 
     for (i = 0; i < num_sources; i++) {
@@ -258,17 +258,21 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
          * corresponding "Generic Error Status Block"
          */
         bios_linker_loader_add_pointer(linker,
-            ACPI_GHES_ERRORS_FW_CFG_FILE, sizeof(uint64_t) * i,
-            sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
-            error_status_block_offset + i * ACPI_GHES_MAX_RAW_DATA_LENGTH);
+                                       ACPI_HW_ERROR_FW_CFG_FILE,
+                                       sizeof(uint64_t) * i,
+                                       sizeof(uint64_t),
+                                       ACPI_HW_ERROR_FW_CFG_FILE,
+                                       error_status_block_offset +
+                                       i * ACPI_GHES_MAX_RAW_DATA_LENGTH);
     }
 
     /*
      * tell firmware to write hardware_errors GPA into
      * hardware_errors_addr fw_cfg, once the former has been initialized.
      */
-    bios_linker_loader_write_pointer(linker, ACPI_GHES_DATA_ADDR_FW_CFG_FILE,
-        0, sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE, 0);
+    bios_linker_loader_write_pointer(linker, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, 0,
+                                     sizeof(uint64_t),
+                                     ACPI_HW_ERROR_FW_CFG_FILE, 0);
 }
 
 /* Build Generic Hardware Error Source version 2 (GHESv2) */
@@ -307,8 +311,10 @@ static void build_ghes_v2(GArray *table_data,
     build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
                      4 /* QWord access */, 0);
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
-        address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
-        ACPI_GHES_ERRORS_FW_CFG_FILE, index * sizeof(uint64_t));
+                                   address_offset + GAS_ADDR_OFFSET,
+                                   sizeof(uint64_t),
+                                   ACPI_HW_ERROR_FW_CFG_FILE,
+                                   index * sizeof(uint64_t));
 
     /* Notification Structure */
     build_ghes_hw_error_notification(table_data, notify);
@@ -327,7 +333,7 @@ static void build_ghes_v2(GArray *table_data,
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
                                    address_offset + GAS_ADDR_OFFSET,
                                    sizeof(uint64_t),
-                                   ACPI_GHES_ERRORS_FW_CFG_FILE,
+                                   ACPI_HW_ERROR_FW_CFG_FILE,
                                    (num_sources + index) * sizeof(uint64_t));
 
     /*
@@ -368,11 +374,11 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
                           GArray *hardware_error)
 {
     /* Create a read-only fw_cfg file for GHES */
-    fw_cfg_add_file(s, ACPI_GHES_ERRORS_FW_CFG_FILE, hardware_error->data,
+    fw_cfg_add_file(s, ACPI_HW_ERROR_FW_CFG_FILE, hardware_error->data,
                     hardware_error->len);
 
     /* Create a read-write fw_cfg file for Address */
-    fw_cfg_add_file_callback(s, ACPI_GHES_DATA_ADDR_FW_CFG_FILE, NULL, NULL,
+    fw_cfg_add_file_callback(s, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, NULL, NULL,
         NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false);
 
     ags->present = true;
-- 
2.46.0

[PATCH v2 14/15] acpi/ghes: better name the offset of the hardware error firmware

[Mauro Carvalho Chehab]

The hardware error firmware is where HEST error structures are
stored. Those can be GHESv2, but they can also be other types.

Better name the location of the hardware error.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 hw/acpi/generic_event_device.c | 4 ++--
 hw/acpi/ghes.c                 | 4 ++--
 include/hw/acpi/ghes.h         | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 15b4c3ebbf24..d4dbfb45e181 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -346,7 +346,7 @@ static const VMStateDescription vmstate_ghes = {
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (const VMStateField[]) {
-        VMSTATE_UINT64(ghes_addr_le, AcpiGhesState),
+        VMSTATE_UINT64(hw_error_le, AcpiGhesState),
         VMSTATE_END_OF_LIST()
     },
 };
@@ -354,7 +354,7 @@ static const VMStateDescription vmstate_ghes = {
 static bool ghes_needed(void *opaque)
 {
     AcpiGedState *s = opaque;
-    return s->ghes_state.ghes_addr_le;
+    return s->ghes_state.hw_error_le;
 }
 
 static const VMStateDescription vmstate_ghes_state = {
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 3d03506fdaf8..8b3292be07e7 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -379,7 +379,7 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
 
     /* Create a read-write fw_cfg file for Address */
     fw_cfg_add_file_callback(s, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, NULL, NULL,
-        NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false);
+        NULL, &(ags->hw_error_le), sizeof(ags->hw_error_le), false);
 
     ags->present = true;
 }
@@ -430,7 +430,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
     }
     ags = &acpi_ged_state->ghes_state;
 
-    get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),
+    get_ghes_offsets(le64_to_cpu(ags->hw_error_le),
                      &cper_addr, &read_ack_register_addr);
 
     if (!cper_addr) {
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 051a9322141f..e47ffacbb5c9 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -58,7 +58,7 @@ enum AcpiGhesNotifyType {
 };
 
 typedef struct AcpiGhesState {
-    uint64_t ghes_addr_le;
+    uint64_t hw_error_le;
     bool present; /* True if GHES is present at all on this board */
 } AcpiGhesState;
 
-- 
2.46.0

Re: [PATCH v2 14/15] acpi/ghes: better name the offset of the hardware error firmware

[Igor Mammedov]

On Tue,  1 Oct 2024 09:03:51 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> The hardware error firmware is where HEST error structures are
> stored. Those can be GHESv2, but they can also be other types.
> 
> Better name the location of the hardware error.
> 
> No functional changes.
> 
> 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/generic_event_device.c | 4 ++--
>  hw/acpi/ghes.c                 | 4 ++--
>  include/hw/acpi/ghes.h         | 2 +-
>  3 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index 15b4c3ebbf24..d4dbfb45e181 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -346,7 +346,7 @@ static const VMStateDescription vmstate_ghes = {
>      .version_id = 1,
>      .minimum_version_id = 1,
>      .fields = (const VMStateField[]) {
> -        VMSTATE_UINT64(ghes_addr_le, AcpiGhesState),
> +        VMSTATE_UINT64(hw_error_le, AcpiGhesState),
>          VMSTATE_END_OF_LIST()
>      },
>  };
> @@ -354,7 +354,7 @@ static const VMStateDescription vmstate_ghes = {
>  static bool ghes_needed(void *opaque)
>  {
>      AcpiGedState *s = opaque;
> -    return s->ghes_state.ghes_addr_le;
> +    return s->ghes_state.hw_error_le;
>  }
>  
>  static const VMStateDescription vmstate_ghes_state = {
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 3d03506fdaf8..8b3292be07e7 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -379,7 +379,7 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
>  
>      /* Create a read-write fw_cfg file for Address */
>      fw_cfg_add_file_callback(s, ACPI_HW_ERROR_ADDR_FW_CFG_FILE, NULL, NULL,
> -        NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false);
> +        NULL, &(ags->hw_error_le), sizeof(ags->hw_error_le), false);
>  
>      ags->present = true;
>  }
> @@ -430,7 +430,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
>      }
>      ags = &acpi_ged_state->ghes_state;
>  
> -    get_ghes_offsets(le64_to_cpu(ags->ghes_addr_le),
> +    get_ghes_offsets(le64_to_cpu(ags->hw_error_le),
>                       &cper_addr, &read_ack_register_addr);
>  
>      if (!cper_addr) {
> diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
> index 051a9322141f..e47ffacbb5c9 100644
> --- a/include/hw/acpi/ghes.h
> +++ b/include/hw/acpi/ghes.h
> @@ -58,7 +58,7 @@ enum AcpiGhesNotifyType {
>  };
>  
>  typedef struct AcpiGhesState {
> -    uint64_t ghes_addr_le;
> +    uint64_t hw_error_le;
>      bool present; /* True if GHES is present at all on this board */
>  } AcpiGhesState;
>  

[PATCH v2 15/15] docs: acpi_hest_ghes: fix documentation for CPER size

[Mauro Carvalho Chehab]

While the spec defines a CPER size of 4KiB for each record,
currently it is set to 1KiB. Fix the documentation and add
a pointer to the macro name there, as this may help to keep
it updated.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 docs/specs/acpi_hest_ghes.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/specs/acpi_hest_ghes.rst b/docs/specs/acpi_hest_ghes.rst
index 68f1fbe0a4af..c3e9f8d9a702 100644
--- a/docs/specs/acpi_hest_ghes.rst
+++ b/docs/specs/acpi_hest_ghes.rst
@@ -67,8 +67,10 @@ Design Details
 (3) The address registers table contains N Error Block Address entries
     and N Read Ack Register entries. The size for each entry is 8-byte.
     The Error Status Data Block table contains N Error Status Data Block
-    entries. The size for each entry is 4096(0x1000) bytes. The total size
-    for the "etc/hardware_errors" fw_cfg blob is (N * 8 * 2 + N * 4096) bytes.
+    entries. The size for each entry is defined at the source code as
+    ACPI_GHES_MAX_RAW_DATA_LENGTH (currently 1024 bytes). The total size
+    for the "etc/hardware_errors" fw_cfg blob is
+    (N * 8 * 2 + N * ACPI_GHES_MAX_RAW_DATA_LENGTH) bytes.
     N is the number of the kinds of hardware error sources.
 
 (4) QEMU generates the ACPI linker/loader script for the firmware. The
-- 
2.46.0