src/intel/xeon_sp: add hardware error support (HEST)

This patch adds the ACPI hardware error source table (HEST) support.
This involves a few different parts: (1) The ACPI HEST table which is filled
with the appropriate fields (2) Reserved memory which is used by runtime
SW to provide error information. OS will not accept a HEST table with
this memory set to 0.

The ASL code to enable APEI bit will be submitted in a separate patch.

Tested on DeltaLake mainboard with following options enabled
SOC_INTEL_XEON_RAS

After boot to Linux, the following will show in dmesg:
HEST: Table parsing has been initialized

Change-Id: If76b2af153616182cc053ca878f30fe056e9c8bd
Signed-off-by: Rocky Phagura <rphagura@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52090
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/soc/intel/xeon_sp/include/soc/hest.h b/src/soc/intel/xeon_sp/include/soc/hest.h
new file mode 100644
index 0000000000..ad79d45fdf
--- /dev/null
+++ b/src/soc/intel/xeon_sp/include/soc/hest.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _HEST_H_
+#define _HEST_H_
+#include <acpi/acpi.h>
+
+#define MCE_ERR_POLL_MS_INTERVAL	1000
+#define HEST_PCIE_RP_AER_DESC_TYPE	6
+#define HEST_GHES_DESC_TYPE		9
+#define GHES_MAX_RAW_DATA_LENGTH	(((CONFIG_ERROR_LOG_BUFFER_SIZE) >> 1) - 8)
+#define GHEST_ERROR_STATUS_BLOCK_LENGTH	((CONFIG_ERROR_LOG_BUFFER_SIZE) >> 1)
+#define GHEST_ASSIST			(1 << 2)
+#define FIRMWARE_FIRST			(1 << 0)
+#define MEM_VALID_BITS			0x66ff
+#define PCIE_VALID_BITS			0xef
+#define QWORD_ACCESS			4
+#define NOTIFY_TYPE_SCI			3
+
+/* Generic Error Source Descriptor */
+typedef struct acpi_ghes_esd {
+	u16 type;
+	u16 source_id;
+	u16 related_src_id;
+	u8 flags;
+	u8 enabled;
+	u32 prealloc_erecords;
+	u32 max_section_per_record;
+} __packed acpi_ghes_esd_t;
+
+typedef struct ghes_record {
+	acpi_ghes_esd_t esd;
+	u32 max_raw_data_length;
+	acpi_addr64_t sts_addr;
+	acpi_hest_hen_t notify;
+	u32 err_sts_blk_len;
+} __packed ghes_record_t;
+
+unsigned long hest_create(unsigned long current, struct acpi_rsdp *rsdp);
+
+#endif