hest.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <soc/acpi.h>
#include <acpi/acpi_gnvs.h>
#include <cbmem.h>
#include <console/console.h>
#include <soc/hest.h>
#include <intelblocks/nvs.h>
 
static u64 hest_get_elog_addr(void)
{
        /* The elog address comes from reserved memory */
        struct global_nvs *gnvs;
        gnvs = acpi_get_gnvs();
        if (!gnvs) {
                printk(BIOS_ERR, "Unable to get gnvs\n");
                return 0;
        }
 
        /* Runtime logging address */
        printk(BIOS_DEBUG, "\t status blk start addr = %llx\n", gnvs->hest_log_addr);
        printk(BIOS_DEBUG, "\t size = %x\n", CONFIG_ERROR_LOG_BUFFER_SIZE);
        return gnvs->hest_log_addr;
}
 
static u32 acpi_hest_add_ghes(void *current)
{
        ghes_record_t *rec = (ghes_record_t *)current;
        u32 size = sizeof(ghes_record_t);
 
        /* Fill GHES error source descriptor  */
        memset(rec, 0, size);
        rec->esd.type = HEST_GHES_DESC_TYPE;
        rec->esd.source_id = 0; /* 0 for MCE check exception source */
        rec->esd.enabled = 1;
        rec->esd.related_src_id = 0xffff;
        rec->esd.prealloc_erecords = 1;
        rec->esd.max_section_per_record = 0xf;
        rec->max_raw_data_length = GHES_MAX_RAW_DATA_LENGTH;
 
        /* Add error_status_address */
        rec->sts_addr.space_id = 0;
        rec->sts_addr.bit_width = 0x40;
        rec->sts_addr.bit_offset = 0;
        rec->sts_addr.access_size = QWORD_ACCESS;
 
        /* Add notification structure */
        rec->notify.type = NOTIFY_TYPE_SCI;
        rec->notify.length = sizeof(acpi_hest_hen_t);
        rec->err_sts_blk_len = GHEST_ERROR_STATUS_BLOCK_LENGTH;
 
        /* error status block entries start address */
        if (CONFIG(SOC_ACPI_HEST))
                rec->sts_addr.addr = hest_get_elog_addr();
 
        return size;
}
 
static unsigned long acpi_fill_hest(acpi_hest_t *hest)
{
        acpi_header_t *header = &(hest->header);
        void *current;
        current = (void *)(hest);
        void *next = current;
        next = hest + 1;
        next += acpi_hest_add_ghes(next);
        hest->error_source_count += 1;
        header->length += next - current;
        return header->length;
}
 
unsigned long hest_create(unsigned long current, struct acpi_rsdp *rsdp)
{
        struct global_nvs *gnvs;
        acpi_hest_t *hest;
 
        /* Reserve memory for Enhanced error logging */
        void *mem = cbmem_add(CBMEM_ID_ACPI_HEST, CONFIG_ERROR_LOG_BUFFER_SIZE);
        if (!mem) {
                printk(BIOS_ERR, "Unable to allocate HEST memory\n");
                return current;
        }
 
        printk(BIOS_DEBUG, "HEST memory created: %p\n", mem);
        gnvs = acpi_get_gnvs();
        if (!gnvs) {
                printk(BIOS_ERR, "Unable to get gnvs\n");
                return current;
        }
        gnvs->hest_log_addr = (uintptr_t)mem;
        printk(BIOS_DEBUG, "elog_addr: %llx, size:%x\n", gnvs->hest_log_addr,
                CONFIG_ERROR_LOG_BUFFER_SIZE);
 
        current = ALIGN(current, 8);
        hest = (acpi_hest_t *)current;
        acpi_write_hest(hest, acpi_fill_hest);
        acpi_add_table(rsdp, (void *)current);
        current += hest->header.length;
        return current;
}