From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/ia64/kernel/err_inject.c | 273 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 273 insertions(+) create mode 100644 arch/ia64/kernel/err_inject.c (limited to 'arch/ia64/kernel/err_inject.c') diff --git a/arch/ia64/kernel/err_inject.c b/arch/ia64/kernel/err_inject.c new file mode 100644 index 000000000..dd5bfed52 --- /dev/null +++ b/arch/ia64/kernel/err_inject.c @@ -0,0 +1,273 @@ +/* + * err_inject.c - + * 1.) Inject errors to a processor. + * 2.) Query error injection capabilities. + * This driver along with user space code can be acting as an error + * injection tool. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Written by: Fenghua Yu , Intel Corporation + * Copyright (C) 2006, Intel Corp. All rights reserved. + * + */ +#include +#include +#include +#include +#include + +#define ERR_INJ_DEBUG + +#define ERR_DATA_BUFFER_SIZE 3 // Three 8-byte; + +#define define_one_ro(name) \ +static DEVICE_ATTR(name, 0444, show_##name, NULL) + +#define define_one_rw(name) \ +static DEVICE_ATTR(name, 0644, show_##name, store_##name) + +static u64 call_start[NR_CPUS]; +static u64 phys_addr[NR_CPUS]; +static u64 err_type_info[NR_CPUS]; +static u64 err_struct_info[NR_CPUS]; +static struct { + u64 data1; + u64 data2; + u64 data3; +} __attribute__((__aligned__(16))) err_data_buffer[NR_CPUS]; +static s64 status[NR_CPUS]; +static u64 capabilities[NR_CPUS]; +static u64 resources[NR_CPUS]; + +#define show(name) \ +static ssize_t \ +show_##name(struct device *dev, struct device_attribute *attr, \ + char *buf) \ +{ \ + u32 cpu=dev->id; \ + return sprintf(buf, "%llx\n", name[cpu]); \ +} + +#define store(name) \ +static ssize_t \ +store_##name(struct device *dev, struct device_attribute *attr, \ + const char *buf, size_t size) \ +{ \ + unsigned int cpu=dev->id; \ + name[cpu] = simple_strtoull(buf, NULL, 16); \ + return size; \ +} + +show(call_start) + +/* It's user's responsibility to call the PAL procedure on a specific + * processor. The cpu number in driver is only used for storing data. + */ +static ssize_t +store_call_start(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned int cpu=dev->id; + unsigned long call_start = simple_strtoull(buf, NULL, 16); + +#ifdef ERR_INJ_DEBUG + printk(KERN_DEBUG "pal_mc_err_inject for cpu%d:\n", cpu); + printk(KERN_DEBUG "err_type_info=%llx,\n", err_type_info[cpu]); + printk(KERN_DEBUG "err_struct_info=%llx,\n", err_struct_info[cpu]); + printk(KERN_DEBUG "err_data_buffer=%llx, %llx, %llx.\n", + err_data_buffer[cpu].data1, + err_data_buffer[cpu].data2, + err_data_buffer[cpu].data3); +#endif + switch (call_start) { + case 0: /* Do nothing. */ + break; + case 1: /* Call pal_mc_error_inject in physical mode. */ + status[cpu]=ia64_pal_mc_error_inject_phys(err_type_info[cpu], + err_struct_info[cpu], + ia64_tpa(&err_data_buffer[cpu]), + &capabilities[cpu], + &resources[cpu]); + break; + case 2: /* Call pal_mc_error_inject in virtual mode. */ + status[cpu]=ia64_pal_mc_error_inject_virt(err_type_info[cpu], + err_struct_info[cpu], + ia64_tpa(&err_data_buffer[cpu]), + &capabilities[cpu], + &resources[cpu]); + break; + default: + status[cpu] = -EINVAL; + break; + } + +#ifdef ERR_INJ_DEBUG + printk(KERN_DEBUG "Returns: status=%d,\n", (int)status[cpu]); + printk(KERN_DEBUG "capabilities=%llx,\n", capabilities[cpu]); + printk(KERN_DEBUG "resources=%llx\n", resources[cpu]); +#endif + return size; +} + +show(err_type_info) +store(err_type_info) + +static ssize_t +show_virtual_to_phys(struct device *dev, struct device_attribute *attr, + char *buf) +{ + unsigned int cpu=dev->id; + return sprintf(buf, "%llx\n", phys_addr[cpu]); +} + +static ssize_t +store_virtual_to_phys(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned int cpu=dev->id; + u64 virt_addr=simple_strtoull(buf, NULL, 16); + int ret; + + ret = get_user_pages_fast(virt_addr, 1, FOLL_WRITE, NULL); + if (ret<=0) { +#ifdef ERR_INJ_DEBUG + printk("Virtual address %llx is not existing.\n", virt_addr); +#endif + return -EINVAL; + } + + phys_addr[cpu] = ia64_tpa(virt_addr); + return size; +} + +show(err_struct_info) +store(err_struct_info) + +static ssize_t +show_err_data_buffer(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned int cpu=dev->id; + + return sprintf(buf, "%llx, %llx, %llx\n", + err_data_buffer[cpu].data1, + err_data_buffer[cpu].data2, + err_data_buffer[cpu].data3); +} + +static ssize_t +store_err_data_buffer(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned int cpu=dev->id; + int ret; + +#ifdef ERR_INJ_DEBUG + printk("write err_data_buffer=[%llx,%llx,%llx] on cpu%d\n", + err_data_buffer[cpu].data1, + err_data_buffer[cpu].data2, + err_data_buffer[cpu].data3, + cpu); +#endif + ret = sscanf(buf, "%llx, %llx, %llx", + &err_data_buffer[cpu].data1, + &err_data_buffer[cpu].data2, + &err_data_buffer[cpu].data3); + if (ret!=ERR_DATA_BUFFER_SIZE) + return -EINVAL; + + return size; +} + +show(status) +show(capabilities) +show(resources) + +define_one_rw(call_start); +define_one_rw(err_type_info); +define_one_rw(err_struct_info); +define_one_rw(err_data_buffer); +define_one_rw(virtual_to_phys); +define_one_ro(status); +define_one_ro(capabilities); +define_one_ro(resources); + +static struct attribute *default_attrs[] = { + &dev_attr_call_start.attr, + &dev_attr_virtual_to_phys.attr, + &dev_attr_err_type_info.attr, + &dev_attr_err_struct_info.attr, + &dev_attr_err_data_buffer.attr, + &dev_attr_status.attr, + &dev_attr_capabilities.attr, + &dev_attr_resources.attr, + NULL +}; + +static struct attribute_group err_inject_attr_group = { + .attrs = default_attrs, + .name = "err_inject" +}; +/* Add/Remove err_inject interface for CPU device */ +static int err_inject_add_dev(unsigned int cpu) +{ + struct device *sys_dev = get_cpu_device(cpu); + + return sysfs_create_group(&sys_dev->kobj, &err_inject_attr_group); +} + +static int err_inject_remove_dev(unsigned int cpu) +{ + struct device *sys_dev = get_cpu_device(cpu); + + sysfs_remove_group(&sys_dev->kobj, &err_inject_attr_group); + return 0; +} + +static enum cpuhp_state hp_online; + +static int __init err_inject_init(void) +{ + int ret; +#ifdef ERR_INJ_DEBUG + printk(KERN_INFO "Enter error injection driver.\n"); +#endif + + ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/err_inj:online", + err_inject_add_dev, err_inject_remove_dev); + if (ret >= 0) { + hp_online = ret; + ret = 0; + } + return ret; +} + +static void __exit err_inject_exit(void) +{ +#ifdef ERR_INJ_DEBUG + printk(KERN_INFO "Exit error injection driver.\n"); +#endif + cpuhp_remove_state(hp_online); +} + +module_init(err_inject_init); +module_exit(err_inject_exit); + +MODULE_AUTHOR("Fenghua Yu "); +MODULE_DESCRIPTION("MC error injection kernel sysfs interface"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3