@@ -26,6 +26,7 @@
#include "qemu/error-report.h"
#include "hw/acpi/generic_event_device.h"
#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"
@@ -43,6 +44,40 @@
#define GAS_ADDR_OFFSET 4
/*
+ * The total size of Generic Error Data Entry
+ * ACPI 6.1/6.2: 18.3.2.7.1 Generic Error Data,
+ * Table 18-343 Generic Error Data Entry
+ */
+#define ACPI_GHES_DATA_LENGTH 72
+
+/* The memory section CPER size, UEFI 2.6: N.2.5 Memory Error Section */
+#define ACPI_GHES_MEM_CPER_LENGTH 80
+
+/* Masks for block_status flags */
+#define ACPI_GEBS_UNCORRECTABLE 1
+
+#define UEFI_CPER_SEC_PLATFORM_MEM \
+ UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
+ 0xED, 0x7C, 0x83, 0xB1)
+
+/*
+ * Total size for Generic Error Status Block except Generic Error Data Entries
+ * ACPI 6.2: 18.3.2.7.1 Generic Error Data,
+ * Table 18-380 Generic Error Status Block
+ */
+#define ACPI_GHES_GESB_SIZE 20
+
+/*
+ * Values for error_severity field
+ */
+enum AcpiGenericErrorSeverity {
+ ACPI_CPER_SEV_RECOVERABLE = 0,
+ ACPI_CPER_SEV_FATAL = 1,
+ ACPI_CPER_SEV_CORRECTED = 2,
+ ACPI_CPER_SEV_NONE = 3,
+};
+
+/*
* Hardware Error Notification
* ACPI 4.0: 17.3.2.7 Hardware Error Notification
* Composes dummy Hardware Error Notification descriptor of specified type
@@ -73,6 +108,131 @@ static void build_ghes_hw_error_notification(GArray *table, const uint8_t type)
}
/*
+ * Generic Error Data Entry
+ * ACPI 6.1: 18.3.2.7.1 Generic Error Data
+ */
+static void acpi_ghes_generic_error_data(GArray *table, QemuUUID section_type,
+ uint32_t error_severity, uint8_t validation_bits, uint8_t flags,
+ uint32_t error_data_length, QemuUUID fru_id,
+ uint64_t time_stamp)
+{
+ /* Section Type */
+ g_array_append_vals(table, section_type.data,
+ ARRAY_SIZE(section_type.data));
+
+ /* Error Severity */
+ build_append_int_noprefix(table, error_severity, 4);
+ /* Revision */
+ build_append_int_noprefix(table, 0x300, 2);
+ /* Validation Bits */
+ build_append_int_noprefix(table, validation_bits, 1);
+ /* Flags */
+ build_append_int_noprefix(table, flags, 1);
+ /* Error Data Length */
+ build_append_int_noprefix(table, error_data_length, 4);
+
+ /* FRU Id */
+ g_array_append_vals(table, fru_id.data, ARRAY_SIZE(fru_id.data));
+
+ /* FRU Text */
+ build_append_int_noprefix(table, 0, 20);
+ /* Timestamp */
+ build_append_int_noprefix(table, time_stamp, 8);
+}
+
+/*
+ * Generic Error Status Block
+ * ACPI 6.1: 18.3.2.7.1 Generic Error Data
+ */
+static void acpi_ghes_generic_error_status(GArray *table, uint32_t block_status,
+ uint32_t raw_data_offset, uint32_t raw_data_length,
+ uint32_t data_length, uint32_t error_severity)
+{
+ /* Block Status */
+ build_append_int_noprefix(table, block_status, 4);
+ /* Raw Data Offset */
+ build_append_int_noprefix(table, raw_data_offset, 4);
+ /* Raw Data Length */
+ build_append_int_noprefix(table, raw_data_length, 4);
+ /* Data Length */
+ build_append_int_noprefix(table, data_length, 4);
+ /* Error Severity */
+ build_append_int_noprefix(table, error_severity, 4);
+}
+
+/* UEFI 2.6: N.2.5 Memory Error Section */
+static void acpi_ghes_build_append_mem_cper(GArray *table,
+ uint64_t error_physical_addr)
+{
+ /*
+ * Memory Error Record
+ */
+
+ /* Validation Bits */
+ build_append_int_noprefix(table,
+ (1ULL << 14) | /* Type Valid */
+ (1ULL << 1) /* Physical Address Valid */,
+ 8);
+ /* Error Status */
+ build_append_int_noprefix(table, 0, 8);
+ /* Physical Address */
+ build_append_int_noprefix(table, error_physical_addr, 8);
+ /* Skip all the detailed information normally found in such a record */
+ build_append_int_noprefix(table, 0, 48);
+ /* Memory Error Type */
+ build_append_int_noprefix(table, 0 /* Unknown error */, 1);
+ /* Skip all the detailed information normally found in such a record */
+ build_append_int_noprefix(table, 0, 7);
+}
+
+static int acpi_ghes_record_mem_error(uint64_t error_block_address,
+ uint64_t error_physical_addr)
+{
+ GArray *block;
+ /* Memory Error Section Type */
+ QemuUUID mem_section_id_le = UEFI_CPER_SEC_PLATFORM_MEM;
+ /* 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;
+
+ /*
+ * Check whether it will run out of the preallocated memory if adding a new
+ * generic error data entry
+ */
+ if ((data_length + ACPI_GHES_GESB_SIZE) > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
+ error_report("Not enough memory to record new CPER!!!");
+ g_array_free(block, true);
+ return -1;
+ }
+
+ /* 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, mem_section_id_le,
+ 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;
+}
+
+/*
* Build table for the hardware error fw_cfg blob.
* Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
* See docs/specs/acpi_hest_ghes.rst for blobs format.
@@ -230,3 +390,61 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
fw_cfg_add_file_callback(s, ACPI_GHES_DATA_ADDR_FW_CFG_FILE, NULL, NULL,
NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false);
}
+
+int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
+{
+ 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_HEST_SRC_ID_RESERVED);
+
+ acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
+ NULL));
+ if (acpi_ged_state) {
+ ags = &acpi_ged_state->ghes_state;
+ } else {
+ error_report("ACPI GED device not found");
+ return -1;
+ }
+
+ start_addr = le64_to_cpu(ags->ghes_addr_le);
+
+ if (physical_address) {
+
+ if (source_id < ACPI_HEST_SRC_ID_RESERVED) {
+ start_addr += source_id * sizeof(uint64_t);
+ }
+
+ cpu_physical_memory_read(start_addr, &error_block_addr,
+ sizeof(error_block_addr));
+
+ 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));
+
+ /* 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");
+ }
+
+ return ret;
+}
@@ -70,4 +70,5 @@ void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker);
void acpi_build_hest(GArray *table_data, BIOSLinker *linker);
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);
#endif