[PATCH 09/31] acpi/ghes: make the GHES record generation more generic

Mauro Carvalho Chehab
2024-12-06T17:21:28Z

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 the Generic Error Data part of the record,
as described at:

ACPI 6.2: 18.3.2.7.1 Generic Error Data

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>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
hw/acpi/ghes.c | 121 ++++++++++++++++++++++++-----------------
include/hw/acpi/ghes.h | 3 +
2 files changed, 73 insertions(+), 51 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index a3dffd78b012..4b5332f8c667 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -181,51 +181,24 @@ 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
- */
- assert((data_length + ACPI_GHES_GESB_SIZE) <=
- ACPI_GHES_MAX_RAW_DATA_LENGTH);

/* 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;
}

/*
@@ -383,15 +356,18 @@ 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;

- assert(source_id < ACPI_GHES_ERROR_SOURCE_COUNT);
+ 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));
@@ -406,6 +382,10 @@ 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;
+ }

read_ack_register_addr = start_addr +
ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
@@ -415,24 +395,63 @@ 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 1 to this register when
+ * it acknowledges the 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;
+ int data_length;
+ GArray *block;
+
+ block = g_array_new(false, true /* clear */, 1);
+
+ 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
+ */
+ assert((data_length + ACPI_GHES_GESB_SIZE) <=
+ ACPI_GHES_MAX_RAW_DATA_LENGTH);
+
+ ghes_gen_err_data_uncorrectable_recoverable(block, guid,
+ 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 9295e46be25e..8859346af51a 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
@@ -73,6 +74,8 @@ 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);

/**
--
2.47.1