static int erst_exec_move_data(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 offset; void *src, *dst; /* ioremap does not work in interrupt context */ if (in_interrupt()) { pr_warn("MOVE_DATA can not be used in interrupt context.\n"); return -EBUSY; } rc = __apei_exec_read_register(entry, &offset); if (rc) return rc; src = ioremap(ctx->src_base + offset, ctx->var2); if (!src) return -ENOMEM; dst = ioremap(ctx->dst_base + offset, ctx->var2); if (!dst) { iounmap(src); return -ENOMEM; } memmove(dst, src, ctx->var2); iounmap(src); iounmap(dst); return 0; }
static int erst_exec_stall_while_true(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 val; u64 timeout = FIRMWARE_TIMEOUT; u64 stall_time; if (ctx->var1 > FIRMWARE_MAX_STALL) { if (!in_nmi()) pr_warn(FW_WARN "Too long stall time for stall while true instruction: 0x%llx.\n", ctx->var1); stall_time = FIRMWARE_MAX_STALL; } else stall_time = ctx->var1; for (;;) { rc = __apei_exec_read_register(entry, &val); if (rc) return rc; if (val != ctx->value) break; if (erst_timedout(&timeout, stall_time * NSEC_PER_USEC)) return -EIO; } return 0; }
static int erst_exec_subtract_value(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 val; rc = __apei_exec_read_register(entry, &val); if (rc) return rc; val -= ctx->value; rc = __apei_exec_write_register(entry, val); return rc; }
int apei_exec_read_register(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 val = 0; rc = __apei_exec_read_register(entry, &val); if (rc) return rc; ctx->value = val; return 0; }
static int erst_exec_skip_next_instruction_if_true( struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 val; rc = __apei_exec_read_register(entry, &val); if (rc) return rc; if (val == ctx->value) { ctx->ip += 2; return APEI_EXEC_SET_IP; } return 0; }
static int erst_exec_stall_while_true(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { int rc; u64 val; u64 timeout = FIRMWARE_TIMEOUT; u64 stall_time = (ctx->var1 > FIRMWARE_MAX_STALL) ? FIRMWARE_MAX_STALL : ctx->var1; for (;;) { rc = __apei_exec_read_register(entry, &val); if (rc) return rc; if (val != ctx->value) break; if (erst_timedout(&timeout, stall_time)) return -EIO; } return 0; }
static int erst_exec_set_dst_address_base(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { return __apei_exec_read_register(entry, &ctx->dst_base); }
static int erst_exec_load_var2(struct apei_exec_context *ctx, struct acpi_whea_header *entry) { return __apei_exec_read_register(entry, &ctx->var2); }