[PATCH v10 10/21] acpi/ghes: make the GHES record generation more generic

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

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 | 101 ++++++++++++++++++++++++++++++-------------------
1 file changed, 63 insertions(+), 38 deletions(-)

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index c88717fb1bef..f54865423f69 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -199,51 +199,30 @@ 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;
}

/*
@@ -424,16 +403,22 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
ags->present = true;
}

-int acpi_ghes_record_errors(int 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 hest_read_ack_start_addr, read_ack_start_addr;
uint64_t hest_addr, cper_addr, err_source_struct;
uint64_t hest_err_block_addr, error_block_addr;
- uint32_t num_sources, i, ret;
+ uint32_t num_sources, i;
AcpiGedState *acpi_ged_state;
AcpiGhesState *ags;
uint64_t read_ack;

+ 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);
@@ -442,9 +427,6 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
hest_addr = le64_to_cpu(ags->hest_addr_le);

cpu_physical_memory_read(hest_addr, &num_sources, sizeof(num_sources));
- if (!physical_address) {
- return -1;
- }

err_source_struct = hest_addr + sizeof(num_sources);

@@ -472,8 +454,8 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
err_source_struct += HEST_GHES_V2_TABLE_SIZE;
}
if (i == num_sources) {
- error_report("HEST: Source %d not found.", source_id);
- return -1;
+ error_setg(errp, "HEST: Source %d not found.", source_id);
+ return;
}

/* Navigate though table address pointers */
@@ -495,12 +477,55 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
cpu_physical_memory_read(read_ack_start_addr,
&read_ack, sizeof(read_ack));

+ /* zero means OSPM does not acknowledge the error */
+ if (!read_ack) {
+ error_setg(errp,
+ "Last CPER record was not acknowledged yet");
+ return;
+ }
+
read_ack = cpu_to_le64(0);
cpu_physical_memory_write(read_ack_start_addr,
&read_ack, sizeof(read_ack));

- ret = acpi_ghes_record_mem_error(error_block_addr, physical_address);
- return ret;
+ /* Write the generic error data entry into guest memory */
+ cpu_physical_memory_write(cper_addr, cper, len);
+}
+
+int acpi_ghes_record_errors(int 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)
--
2.46.0