Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * APEI Hardware Error Souce Table support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * HEST describes error sources in detail; communicates operational
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * parameters (i.e. severity levels, masking bits, and threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * values) to Linux as necessary. It also allows the BIOS to report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * non-standard error sources to Linux (for example, chipset-specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * error registers).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * For more information about HEST, please refer to ACPI Specification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * version 4.0, section 17.3.2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * Copyright 2009 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *   Author: Huang Ying <ying.huang@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/kdebug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <acpi/apei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <acpi/ghes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include "apei-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define HEST_PFX "HEST: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) int hest_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) EXPORT_SYMBOL_GPL(hest_disable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) /* HEST table parsing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static struct acpi_table_hest *__read_mostly hest_tab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static const int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	[ACPI_HEST_TYPE_IA32_CHECK] = -1,	/* need further calculation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	[ACPI_HEST_TYPE_IA32_CORRECTED_CHECK] = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	[ACPI_HEST_TYPE_IA32_NMI] = sizeof(struct acpi_hest_ia_nmi),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	[ACPI_HEST_TYPE_AER_ROOT_PORT] = sizeof(struct acpi_hest_aer_root),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	[ACPI_HEST_TYPE_AER_ENDPOINT] = sizeof(struct acpi_hest_aer),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	[ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	[ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	[ACPI_HEST_TYPE_GENERIC_ERROR_V2] = sizeof(struct acpi_hest_generic_v2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	[ACPI_HEST_TYPE_IA32_DEFERRED_CHECK] = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	u16 hest_type = hest_hdr->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (hest_type >= ACPI_HEST_TYPE_RESERVED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	len = hest_esrc_len_tab[hest_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (hest_type == ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		struct acpi_hest_ia_corrected *cmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		len = sizeof(*cmc) + cmc->num_hardware_banks *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			sizeof(struct acpi_hest_ia_error_bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	} else if (hest_type == ACPI_HEST_TYPE_IA32_CHECK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		struct acpi_hest_ia_machine_check *mc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		mc = (struct acpi_hest_ia_machine_check *)hest_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		len = sizeof(*mc) + mc->num_hardware_banks *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			sizeof(struct acpi_hest_ia_error_bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	} else if (hest_type == ACPI_HEST_TYPE_IA32_DEFERRED_CHECK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		struct acpi_hest_ia_deferred_check *mc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		mc = (struct acpi_hest_ia_deferred_check *)hest_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		len = sizeof(*mc) + mc->num_hardware_banks *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			sizeof(struct acpi_hest_ia_error_bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	BUG_ON(len == -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) int apei_hest_parse(apei_hest_func_t func, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct acpi_hest_header *hest_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	int i, rc, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	if (hest_disable || !hest_tab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	for (i = 0; i < hest_tab->error_source_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		len = hest_esrc_len(hest_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (!len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			pr_warn(FW_WARN HEST_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				"Unknown or unused hardware error source "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				"type: %d for hardware error source: %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				hest_hdr->type, hest_hdr->source_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		if ((void *)hest_hdr + len >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		    (void *)hest_tab + hest_tab->header.length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			pr_warn(FW_BUG HEST_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		"Table contents overflow for hardware error source: %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 				hest_hdr->source_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		rc = func(hest_hdr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 			return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		hest_hdr = (void *)hest_hdr + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) EXPORT_SYMBOL_GPL(apei_hest_parse);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  * Check if firmware advertises firmware first mode. We need FF bit to be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * along with a set of MC banks which work in FF mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (!acpi_disable_cmcff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return !arch_apei_enable_cmcff(hest_hdr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct ghes_arr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct platform_device **ghes_devs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	unsigned int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int __init hest_parse_ghes_count(struct acpi_hest_header *hest_hdr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int *count = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	    hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR_V2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		(*count)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static int __init hest_parse_ghes(struct acpi_hest_header *hest_hdr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct platform_device *ghes_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct ghes_arr *ghes_arr = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	int rc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	    hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR_V2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (!((struct acpi_hest_generic *)hest_hdr)->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	for (i = 0; i < ghes_arr->count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		struct acpi_hest_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		ghes_dev = ghes_arr->ghes_devs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		hdr = *(struct acpi_hest_header **)ghes_dev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (hdr->source_id == hest_hdr->source_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			pr_warn(FW_WARN HEST_PFX "Duplicated hardware error source ID: %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				hdr->source_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	ghes_dev = platform_device_alloc("GHES", hest_hdr->source_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (!ghes_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	rc = platform_device_add_data(ghes_dev, &hest_hdr, sizeof(void *));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	rc = platform_device_add(ghes_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	ghes_arr->ghes_devs[ghes_arr->count++] = ghes_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	platform_device_put(ghes_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static int __init hest_ghes_dev_register(unsigned int ghes_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	int rc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	struct ghes_arr ghes_arr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	ghes_arr.count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	ghes_arr.ghes_devs = kmalloc_array(ghes_count, sizeof(void *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 					   GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (!ghes_arr.ghes_devs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	rc = apei_hest_parse(hest_parse_ghes, &ghes_arr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	rc = ghes_estatus_pool_init(ghes_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	kfree(ghes_arr.ghes_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	for (i = 0; i < ghes_arr.count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		platform_device_unregister(ghes_arr.ghes_devs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static int __init setup_hest_disable(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	hest_disable = HEST_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) __setup("hest_disable", setup_hest_disable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) void __init acpi_hest_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	unsigned int ghes_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (hest_disable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		pr_info(HEST_PFX "Table parsing disabled.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	status = acpi_get_table(ACPI_SIG_HEST, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 				(struct acpi_table_header **)&hest_tab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	if (status == AE_NOT_FOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		hest_disable = HEST_NOT_FOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	} else if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		const char *msg = acpi_format_exception(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		pr_err(HEST_PFX "Failed to get table, %s\n", msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		hest_disable = HEST_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	rc = apei_hest_parse(hest_parse_cmc, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if (!ghes_disable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		if (ghes_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 			rc = hest_ghes_dev_register(ghes_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	pr_info(HEST_PFX "Table parsing has been initialized.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	hest_disable = HEST_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	acpi_put_table((struct acpi_table_header *)hest_tab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }