[PATCH v10 05/21] acpi/ghes: better handle source_id and notification

Mauro Carvalho Chehab
2024-09-14T06:13:54Z

GHES has two fields with somewhat meanings:
- 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.

The current logic is arm-specific, implementing a single source ID,
for an armv8-specific synchronous report mechanism (SEA).

Cleanup the code to make easier to add other types and make the
code portable to non-ARM.

As a collateral effect of such change, build_ghes_error_table()
function is now an internal function.

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

---

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 | 31 +++++++++++++++----------------
hw/arm/virt-acpi-build.c | 5 ++---
include/hw/acpi/ghes.h | 6 +++---
3 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 17b7d9e10f3e..939e89723a2f 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -234,7 +234,7 @@ 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;

@@ -285,9 +285,13 @@ 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)
@@ -317,18 +321,8 @@ 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);
@@ -357,19 +351,24 @@ 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);

+ /* Beginning at the HEST Error Source struct count and data */
int hest_offset = table_data->len;

/* 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);

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 5421ffcbb7fa..c9bbda4740e2 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -69,12 +69,12 @@ 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);
-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