^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-base.c - ACPI Platform Error Interface (APEI) supporting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * infrastructure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * APEI allows to report errors (for example from the chipset) to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * the operating system. This improves NMI handling especially. In
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * addition it supports error serialization and error injection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * For more information about APEI, please refer to ACPI Specification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * version 4.0, chapter 17.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This file has Common functions used by more than one APEI table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * including framework of interpreter for ERST and EINJ; resource
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * management for APEI registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Copyright (C) 2009, Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Author: Huang Ying <ying.huang@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/kref.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/rculist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "apei-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define APEI_PFX "APEI: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * APEI ERST (Error Record Serialization Table) and EINJ (Error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * INJection) interpreter framework.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define APEI_EXEC_PRESERVE_REGISTER 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) void apei_exec_ctx_init(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct apei_exec_ins_type *ins_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u32 instructions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct acpi_whea_header *action_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u32 entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) ctx->ins_table = ins_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ctx->instructions = instructions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ctx->action_table = action_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ctx->entries = entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) EXPORT_SYMBOL_GPL(apei_exec_ctx_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) rc = apei_read(val, &entry->register_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *val >>= entry->register_region.bit_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *val &= entry->mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int apei_exec_read_register(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct acpi_whea_header *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u64 val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) rc = __apei_exec_read_register(entry, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ctx->value = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) EXPORT_SYMBOL_GPL(apei_exec_read_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int apei_exec_read_register_value(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct acpi_whea_header *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) rc = apei_exec_read_register(ctx, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ctx->value = (ctx->value == entry->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) EXPORT_SYMBOL_GPL(apei_exec_read_register_value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) val &= entry->mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) val <<= entry->register_region.bit_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (entry->flags & APEI_EXEC_PRESERVE_REGISTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) u64 valr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) rc = apei_read(&valr, &entry->register_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) valr &= ~(entry->mask << entry->register_region.bit_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) val |= valr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rc = apei_write(val, &entry->register_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int apei_exec_write_register(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct acpi_whea_header *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return __apei_exec_write_register(entry, ctx->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) EXPORT_SYMBOL_GPL(apei_exec_write_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int apei_exec_write_register_value(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct acpi_whea_header *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ctx->value = entry->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) rc = apei_exec_write_register(ctx, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) EXPORT_SYMBOL_GPL(apei_exec_write_register_value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int apei_exec_noop(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct acpi_whea_header *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) EXPORT_SYMBOL_GPL(apei_exec_noop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * Interpret the specified action. Go through whole action table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * execute all instructions belong to the action.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int __apei_exec_run(struct apei_exec_context *ctx, u8 action,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) bool optional)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int rc = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) u32 i, ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct acpi_whea_header *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) apei_exec_ins_func_t run;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) ctx->ip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * "ip" is the instruction pointer of current instruction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * "ctx->ip" specifies the next instruction to executed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * instruction "run" function may change the "ctx->ip" to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * implement "goto" semantics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) rewind:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) for (i = 0; i < ctx->entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) entry = &ctx->action_table[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (entry->action != action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (ip == ctx->ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (entry->instruction >= ctx->instructions ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) !ctx->ins_table[entry->instruction].run) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) pr_warn(FW_WARN APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) "Invalid action table, unknown instruction type: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) entry->instruction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) run = ctx->ins_table[entry->instruction].run;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) rc = run(ctx, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) else if (rc != APEI_EXEC_SET_IP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ctx->ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (ctx->ip < ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) goto rewind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return !optional && rc < 0 ? rc : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) EXPORT_SYMBOL_GPL(__apei_exec_run);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) typedef int (*apei_exec_entry_func_t)(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct acpi_whea_header *entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) void *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static int apei_exec_for_each_entry(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) apei_exec_entry_func_t func,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int *end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) u8 ins;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct acpi_whea_header *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct apei_exec_ins_type *ins_table = ctx->ins_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) for (i = 0; i < ctx->entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) entry = ctx->action_table + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) ins = entry->instruction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) *end = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (ins >= ctx->instructions || !ins_table[ins].run) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) pr_warn(FW_WARN APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) "Invalid action table, unknown instruction type: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) rc = func(ctx, entry, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int pre_map_gar_callback(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct acpi_whea_header *entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) u8 ins = entry->instruction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return apei_map_generic_address(&entry->register_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * Pre-map all GARs in action table to make it possible to access them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * in NMI handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int apei_exec_pre_map_gars(struct apei_exec_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int rc, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) rc = apei_exec_for_each_entry(ctx, pre_map_gar_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) NULL, &end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct apei_exec_context ctx_unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) memcpy(&ctx_unmap, ctx, sizeof(*ctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ctx_unmap.entries = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) apei_exec_post_unmap_gars(&ctx_unmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) EXPORT_SYMBOL_GPL(apei_exec_pre_map_gars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int post_unmap_gar_callback(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct acpi_whea_header *entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) u8 ins = entry->instruction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) apei_unmap_generic_address(&entry->register_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* Post-unmap all GAR in action table. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) int apei_exec_post_unmap_gars(struct apei_exec_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return apei_exec_for_each_entry(ctx, post_unmap_gar_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) EXPORT_SYMBOL_GPL(apei_exec_post_unmap_gars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * Resource management for GARs in APEI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct apei_res {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) unsigned long start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) unsigned long end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /* Collect all resources requested, to avoid conflict */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct apei_resources apei_resources_all = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .iomem = LIST_HEAD_INIT(apei_resources_all.iomem),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .ioport = LIST_HEAD_INIT(apei_resources_all.ioport),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static int apei_res_add(struct list_head *res_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) unsigned long start, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct apei_res *res, *resn, *res_ins = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) unsigned long end = start + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (end <= start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) repeat:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) list_for_each_entry_safe(res, resn, res_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (res->start > end || res->end < start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) else if (end <= res->end && start >= res->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) kfree(res_ins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) list_del(&res->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) res->start = start = min(res->start, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) res->end = end = max(res->end, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) kfree(res_ins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) res_ins = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) goto repeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (res_ins)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) list_add(&res_ins->list, res_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) res_ins = kmalloc(sizeof(*res), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (!res_ins)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) res_ins->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) res_ins->end = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) list_add(&res_ins->list, res_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int apei_res_sub(struct list_head *res_list1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct list_head *res_list2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct apei_res *res1, *resn1, *res2, *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) res1 = list_entry(res_list1->next, struct apei_res, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) resn1 = list_entry(res1->list.next, struct apei_res, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) while (&res1->list != res_list1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) list_for_each_entry(res2, res_list2, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (res1->start >= res2->end ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) res1->end <= res2->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) else if (res1->end <= res2->end &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) res1->start >= res2->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) list_del(&res1->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) kfree(res1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) } else if (res1->end > res2->end &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) res1->start < res2->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) res = kmalloc(sizeof(*res), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) res->start = res2->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) res->end = res1->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) res1->end = res2->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) list_add(&res->list, &res1->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) resn1 = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (res1->start < res2->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) res1->end = res2->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) res1->start = res2->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) res1 = resn1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) resn1 = list_entry(resn1->list.next, struct apei_res, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static void apei_res_clean(struct list_head *res_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct apei_res *res, *resn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) list_for_each_entry_safe(res, resn, res_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) list_del(&res->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) kfree(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) void apei_resources_fini(struct apei_resources *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) apei_res_clean(&resources->iomem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) apei_res_clean(&resources->ioport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) EXPORT_SYMBOL_GPL(apei_resources_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int apei_resources_merge(struct apei_resources *resources1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct apei_resources *resources2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct apei_res *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) list_for_each_entry(res, &resources2->iomem, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) rc = apei_res_add(&resources1->iomem, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) list_for_each_entry(res, &resources2->ioport, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) rc = apei_res_add(&resources1->ioport, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) int apei_resources_add(struct apei_resources *resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) unsigned long start, unsigned long size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) bool iomem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (iomem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return apei_res_add(&resources->iomem, start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return apei_res_add(&resources->ioport, start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) EXPORT_SYMBOL_GPL(apei_resources_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * EINJ has two groups of GARs (EINJ table entry and trigger table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * entry), so common resources are subtracted from the trigger table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * resources before the second requesting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) int apei_resources_sub(struct apei_resources *resources1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct apei_resources *resources2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) rc = apei_res_sub(&resources1->iomem, &resources2->iomem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return apei_res_sub(&resources1->ioport, &resources2->ioport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) EXPORT_SYMBOL_GPL(apei_resources_sub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) static int apei_get_res_callback(__u64 start, __u64 size, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct apei_resources *resources = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) return apei_res_add(&resources->iomem, start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static int apei_get_nvs_resources(struct apei_resources *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return acpi_nvs_for_each_region(apei_get_res_callback, resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) int (*arch_apei_filter_addr)(int (*func)(__u64 start, __u64 size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) void *data), void *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) static int apei_get_arch_resources(struct apei_resources *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return arch_apei_filter_addr(apei_get_res_callback, resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * IO memory/port resource management mechanism is used to check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) * whether memory/port area used by GARs conflicts with normal memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) * or IO memory/port of devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int apei_resources_request(struct apei_resources *resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) const char *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct apei_res *res, *res_bak = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct resource *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) struct apei_resources nvs_resources, arch_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) rc = apei_resources_sub(resources, &apei_resources_all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * Some firmware uses ACPI NVS region, that has been marked as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * busy, so exclude it from APEI resources to avoid false
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * conflict.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) apei_resources_init(&nvs_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) rc = apei_get_nvs_resources(&nvs_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) goto nvs_res_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) rc = apei_resources_sub(resources, &nvs_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) goto nvs_res_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) if (arch_apei_filter_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) apei_resources_init(&arch_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) rc = apei_get_arch_resources(&arch_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) goto arch_res_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) rc = apei_resources_sub(resources, &arch_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto arch_res_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) list_for_each_entry(res, &resources->iomem, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) r = request_mem_region(res->start, res->end - res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) pr_err(APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) "Can not request [mem %#010llx-%#010llx] for %s registers\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) (unsigned long long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) (unsigned long long)res->end - 1, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) res_bak = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) goto err_unmap_iomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) list_for_each_entry(res, &resources->ioport, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) r = request_region(res->start, res->end - res->start, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) pr_err(APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) "Can not request [io %#06llx-%#06llx] for %s registers\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) (unsigned long long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) (unsigned long long)res->end - 1, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) res_bak = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) goto err_unmap_ioport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) rc = apei_resources_merge(&apei_resources_all, resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) pr_err(APEI_PFX "Fail to merge resources!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) goto err_unmap_ioport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) goto arch_res_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) err_unmap_ioport:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) list_for_each_entry(res, &resources->ioport, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (res == res_bak)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) release_region(res->start, res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) res_bak = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) err_unmap_iomem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) list_for_each_entry(res, &resources->iomem, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (res == res_bak)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) release_mem_region(res->start, res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) arch_res_fini:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (arch_apei_filter_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) apei_resources_fini(&arch_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) nvs_res_fini:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) apei_resources_fini(&nvs_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) EXPORT_SYMBOL_GPL(apei_resources_request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) void apei_resources_release(struct apei_resources *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) struct apei_res *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) list_for_each_entry(res, &resources->iomem, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) release_mem_region(res->start, res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) list_for_each_entry(res, &resources->ioport, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) release_region(res->start, res->end - res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) rc = apei_resources_sub(&apei_resources_all, resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) pr_err(APEI_PFX "Fail to sub resources!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) EXPORT_SYMBOL_GPL(apei_resources_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static int apei_check_gar(struct acpi_generic_address *reg, u64 *paddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) u32 *access_bit_width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) u32 bit_width, bit_offset, access_size_code, space_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) bit_width = reg->bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) bit_offset = reg->bit_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) access_size_code = reg->access_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) space_id = reg->space_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) *paddr = get_unaligned(®->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (!*paddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) pr_warn(FW_BUG APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) "Invalid physical address in GAR [0x%llx/%u/%u/%u/%u]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) *paddr, bit_width, bit_offset, access_size_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) space_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (access_size_code < 1 || access_size_code > 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) pr_warn(FW_BUG APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) "Invalid access size code in GAR [0x%llx/%u/%u/%u/%u]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *paddr, bit_width, bit_offset, access_size_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) space_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) *access_bit_width = 1UL << (access_size_code + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /* Fixup common BIOS bug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (bit_width == 32 && bit_offset == 0 && (*paddr & 0x03) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) *access_bit_width < 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) *access_bit_width = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) else if (bit_width == 64 && bit_offset == 0 && (*paddr & 0x07) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) *access_bit_width < 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) *access_bit_width = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) if ((bit_width + bit_offset) > *access_bit_width) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) pr_warn(FW_BUG APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) "Invalid bit width + offset in GAR [0x%llx/%u/%u/%u/%u]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) *paddr, bit_width, bit_offset, access_size_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) space_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) space_id != ACPI_ADR_SPACE_SYSTEM_IO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) pr_warn(FW_BUG APEI_PFX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) "Invalid address space type in GAR [0x%llx/%u/%u/%u/%u]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) *paddr, bit_width, bit_offset, access_size_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) space_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) int apei_map_generic_address(struct acpi_generic_address *reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) u32 access_bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) u64 address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) rc = apei_check_gar(reg, &address, &access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) /* IO space doesn't need mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (!acpi_os_map_generic_address(reg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) EXPORT_SYMBOL_GPL(apei_map_generic_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /* read GAR in interrupt (including NMI) or process context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) int apei_read(u64 *val, struct acpi_generic_address *reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) u32 access_bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) u64 address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) rc = apei_check_gar(reg, &address, &access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) *val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) switch(reg->space_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) case ACPI_ADR_SPACE_SYSTEM_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) status = acpi_os_read_memory((acpi_physical_address) address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) val, access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) case ACPI_ADR_SPACE_SYSTEM_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) status = acpi_os_read_port(address, (u32 *)val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) EXPORT_SYMBOL_GPL(apei_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) /* write GAR in interrupt (including NMI) or process context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) int apei_write(u64 val, struct acpi_generic_address *reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) u32 access_bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) u64 address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) rc = apei_check_gar(reg, &address, &access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) switch (reg->space_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) case ACPI_ADR_SPACE_SYSTEM_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) status = acpi_os_write_memory((acpi_physical_address) address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) val, access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) case ACPI_ADR_SPACE_SYSTEM_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) status = acpi_os_write_port(address, val, access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) EXPORT_SYMBOL_GPL(apei_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) static int collect_res_callback(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct acpi_whea_header *entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct apei_resources *resources = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct acpi_generic_address *reg = &entry->register_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) u8 ins = entry->instruction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) u32 access_bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) u64 paddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) if (!(ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) rc = apei_check_gar(reg, &paddr, &access_bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) switch (reg->space_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) case ACPI_ADR_SPACE_SYSTEM_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) return apei_res_add(&resources->iomem, paddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) access_bit_width / 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) case ACPI_ADR_SPACE_SYSTEM_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return apei_res_add(&resources->ioport, paddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) access_bit_width / 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * Same register may be used by multiple instructions in GARs, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) * resources are collected before requesting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) int apei_exec_collect_resources(struct apei_exec_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) struct apei_resources *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return apei_exec_for_each_entry(ctx, collect_res_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) resources, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) EXPORT_SYMBOL_GPL(apei_exec_collect_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) struct dentry *apei_get_debugfs_dir(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) static struct dentry *dapei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (!dapei)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) dapei = debugfs_create_dir("apei", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) return dapei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) EXPORT_SYMBOL_GPL(apei_get_debugfs_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) int __weak arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) EXPORT_SYMBOL_GPL(arch_apei_enable_cmcff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) void __weak arch_apei_report_mem_error(int sev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) struct cper_sec_mem_err *mem_err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) EXPORT_SYMBOL_GPL(arch_apei_report_mem_error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) int apei_osc_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) acpi_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) u32 capbuf[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) struct acpi_osc_context context = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) .uuid_str = whea_uuid_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) .rev = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) .cap.length = sizeof(capbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) .cap.pointer = capbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) capbuf[OSC_SUPPORT_DWORD] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) capbuf[OSC_CONTROL_DWORD] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) || ACPI_FAILURE(acpi_run_osc(handle, &context)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) kfree(context.ret.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) EXPORT_SYMBOL_GPL(apei_osc_setup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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