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![Tony Luck](/assets/img/avatar_default.png)
SGX EPC pages do not have a "struct page" associated with them so the pfn_valid() sanity check fails and results in a warning message to the console. Add an additional check to skip the warning if the address of the error is in an SGX EPC page. Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Tested-by: Reinette Chatre <reinette.chatre@intel.com> Link: https://lkml.kernel.org/r/20211026220050.697075-8-tony.luck@intel.com
1502 lines
39 KiB
C
1502 lines
39 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* APEI Generic Hardware Error Source support
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*
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* Generic Hardware Error Source provides a way to report platform
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* hardware errors (such as that from chipset). It works in so called
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* "Firmware First" mode, that is, hardware errors are reported to
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* firmware firstly, then reported to Linux by firmware. This way,
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* some non-standard hardware error registers or non-standard hardware
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* link can be checked by firmware to produce more hardware error
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* information for Linux.
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*
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* For more information about Generic Hardware Error Source, please
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* refer to ACPI Specification version 4.0, section 17.3.2.6
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*
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* Copyright 2010,2011 Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*/
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#include <linux/arm_sdei.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/acpi.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/cper.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/ratelimit.h>
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#include <linux/vmalloc.h>
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#include <linux/irq_work.h>
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#include <linux/llist.h>
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#include <linux/genalloc.h>
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#include <linux/pci.h>
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#include <linux/pfn.h>
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#include <linux/aer.h>
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#include <linux/nmi.h>
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#include <linux/sched/clock.h>
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#include <linux/uuid.h>
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#include <linux/ras.h>
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#include <linux/task_work.h>
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#include <acpi/actbl1.h>
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#include <acpi/ghes.h>
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#include <acpi/apei.h>
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#include <asm/fixmap.h>
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#include <asm/tlbflush.h>
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#include <ras/ras_event.h>
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#include "apei-internal.h"
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#define GHES_PFX "GHES: "
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#define GHES_ESTATUS_MAX_SIZE 65536
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#define GHES_ESOURCE_PREALLOC_MAX_SIZE 65536
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#define GHES_ESTATUS_POOL_MIN_ALLOC_ORDER 3
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/* This is just an estimation for memory pool allocation */
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#define GHES_ESTATUS_CACHE_AVG_SIZE 512
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#define GHES_ESTATUS_CACHES_SIZE 4
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#define GHES_ESTATUS_IN_CACHE_MAX_NSEC 10000000000ULL
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/* Prevent too many caches are allocated because of RCU */
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#define GHES_ESTATUS_CACHE_ALLOCED_MAX (GHES_ESTATUS_CACHES_SIZE * 3 / 2)
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#define GHES_ESTATUS_CACHE_LEN(estatus_len) \
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(sizeof(struct ghes_estatus_cache) + (estatus_len))
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#define GHES_ESTATUS_FROM_CACHE(estatus_cache) \
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((struct acpi_hest_generic_status *) \
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((struct ghes_estatus_cache *)(estatus_cache) + 1))
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#define GHES_ESTATUS_NODE_LEN(estatus_len) \
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(sizeof(struct ghes_estatus_node) + (estatus_len))
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#define GHES_ESTATUS_FROM_NODE(estatus_node) \
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((struct acpi_hest_generic_status *) \
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((struct ghes_estatus_node *)(estatus_node) + 1))
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#define GHES_VENDOR_ENTRY_LEN(gdata_len) \
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(sizeof(struct ghes_vendor_record_entry) + (gdata_len))
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#define GHES_GDATA_FROM_VENDOR_ENTRY(vendor_entry) \
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((struct acpi_hest_generic_data *) \
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((struct ghes_vendor_record_entry *)(vendor_entry) + 1))
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/*
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* NMI-like notifications vary by architecture, before the compiler can prune
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* unused static functions it needs a value for these enums.
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*/
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#ifndef CONFIG_ARM_SDE_INTERFACE
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#define FIX_APEI_GHES_SDEI_NORMAL __end_of_fixed_addresses
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#define FIX_APEI_GHES_SDEI_CRITICAL __end_of_fixed_addresses
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#endif
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static inline bool is_hest_type_generic_v2(struct ghes *ghes)
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{
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return ghes->generic->header.type == ACPI_HEST_TYPE_GENERIC_ERROR_V2;
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}
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/*
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* This driver isn't really modular, however for the time being,
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* continuing to use module_param is the easiest way to remain
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* compatible with existing boot arg use cases.
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*/
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bool ghes_disable;
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module_param_named(disable, ghes_disable, bool, 0);
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/*
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* All error sources notified with HED (Hardware Error Device) share a
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* single notifier callback, so they need to be linked and checked one
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* by one. This holds true for NMI too.
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*
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* RCU is used for these lists, so ghes_list_mutex is only used for
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* list changing, not for traversing.
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*/
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static LIST_HEAD(ghes_hed);
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static DEFINE_MUTEX(ghes_list_mutex);
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/*
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* Because the memory area used to transfer hardware error information
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* from BIOS to Linux can be determined only in NMI, IRQ or timer
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* handler, but general ioremap can not be used in atomic context, so
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* the fixmap is used instead.
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*
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* This spinlock is used to prevent the fixmap entry from being used
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* simultaneously.
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*/
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static DEFINE_SPINLOCK(ghes_notify_lock_irq);
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struct ghes_vendor_record_entry {
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struct work_struct work;
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int error_severity;
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char vendor_record[];
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};
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static struct gen_pool *ghes_estatus_pool;
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static unsigned long ghes_estatus_pool_size_request;
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static struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE];
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static atomic_t ghes_estatus_cache_alloced;
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static int ghes_panic_timeout __read_mostly = 30;
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static void __iomem *ghes_map(u64 pfn, enum fixed_addresses fixmap_idx)
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{
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phys_addr_t paddr;
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pgprot_t prot;
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paddr = PFN_PHYS(pfn);
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prot = arch_apei_get_mem_attribute(paddr);
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__set_fixmap(fixmap_idx, paddr, prot);
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return (void __iomem *) __fix_to_virt(fixmap_idx);
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}
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static void ghes_unmap(void __iomem *vaddr, enum fixed_addresses fixmap_idx)
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{
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int _idx = virt_to_fix((unsigned long)vaddr);
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WARN_ON_ONCE(fixmap_idx != _idx);
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clear_fixmap(fixmap_idx);
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}
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int ghes_estatus_pool_init(int num_ghes)
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{
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unsigned long addr, len;
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int rc;
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ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1);
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if (!ghes_estatus_pool)
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return -ENOMEM;
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len = GHES_ESTATUS_CACHE_AVG_SIZE * GHES_ESTATUS_CACHE_ALLOCED_MAX;
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len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE);
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ghes_estatus_pool_size_request = PAGE_ALIGN(len);
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addr = (unsigned long)vmalloc(PAGE_ALIGN(len));
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if (!addr)
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goto err_pool_alloc;
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rc = gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1);
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if (rc)
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goto err_pool_add;
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return 0;
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err_pool_add:
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vfree((void *)addr);
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err_pool_alloc:
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gen_pool_destroy(ghes_estatus_pool);
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return -ENOMEM;
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}
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static int map_gen_v2(struct ghes *ghes)
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{
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return apei_map_generic_address(&ghes->generic_v2->read_ack_register);
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}
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static void unmap_gen_v2(struct ghes *ghes)
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{
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apei_unmap_generic_address(&ghes->generic_v2->read_ack_register);
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}
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static void ghes_ack_error(struct acpi_hest_generic_v2 *gv2)
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{
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int rc;
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u64 val = 0;
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rc = apei_read(&val, &gv2->read_ack_register);
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if (rc)
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return;
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val &= gv2->read_ack_preserve << gv2->read_ack_register.bit_offset;
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val |= gv2->read_ack_write << gv2->read_ack_register.bit_offset;
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apei_write(val, &gv2->read_ack_register);
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}
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static struct ghes *ghes_new(struct acpi_hest_generic *generic)
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{
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struct ghes *ghes;
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unsigned int error_block_length;
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int rc;
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ghes = kzalloc(sizeof(*ghes), GFP_KERNEL);
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if (!ghes)
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return ERR_PTR(-ENOMEM);
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ghes->generic = generic;
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if (is_hest_type_generic_v2(ghes)) {
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rc = map_gen_v2(ghes);
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if (rc)
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goto err_free;
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}
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rc = apei_map_generic_address(&generic->error_status_address);
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if (rc)
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goto err_unmap_read_ack_addr;
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error_block_length = generic->error_block_length;
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if (error_block_length > GHES_ESTATUS_MAX_SIZE) {
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pr_warn(FW_WARN GHES_PFX
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"Error status block length is too long: %u for "
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"generic hardware error source: %d.\n",
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error_block_length, generic->header.source_id);
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error_block_length = GHES_ESTATUS_MAX_SIZE;
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}
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ghes->estatus = kmalloc(error_block_length, GFP_KERNEL);
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if (!ghes->estatus) {
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rc = -ENOMEM;
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goto err_unmap_status_addr;
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}
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return ghes;
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err_unmap_status_addr:
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apei_unmap_generic_address(&generic->error_status_address);
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err_unmap_read_ack_addr:
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if (is_hest_type_generic_v2(ghes))
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unmap_gen_v2(ghes);
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err_free:
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kfree(ghes);
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return ERR_PTR(rc);
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}
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static void ghes_fini(struct ghes *ghes)
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{
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kfree(ghes->estatus);
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apei_unmap_generic_address(&ghes->generic->error_status_address);
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if (is_hest_type_generic_v2(ghes))
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unmap_gen_v2(ghes);
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}
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static inline int ghes_severity(int severity)
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{
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switch (severity) {
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case CPER_SEV_INFORMATIONAL:
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return GHES_SEV_NO;
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case CPER_SEV_CORRECTED:
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return GHES_SEV_CORRECTED;
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case CPER_SEV_RECOVERABLE:
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return GHES_SEV_RECOVERABLE;
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case CPER_SEV_FATAL:
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return GHES_SEV_PANIC;
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default:
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/* Unknown, go panic */
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return GHES_SEV_PANIC;
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}
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}
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static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
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int from_phys,
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enum fixed_addresses fixmap_idx)
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{
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void __iomem *vaddr;
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u64 offset;
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u32 trunk;
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while (len > 0) {
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offset = paddr - (paddr & PAGE_MASK);
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vaddr = ghes_map(PHYS_PFN(paddr), fixmap_idx);
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trunk = PAGE_SIZE - offset;
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trunk = min(trunk, len);
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if (from_phys)
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memcpy_fromio(buffer, vaddr + offset, trunk);
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else
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memcpy_toio(vaddr + offset, buffer, trunk);
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len -= trunk;
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paddr += trunk;
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buffer += trunk;
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ghes_unmap(vaddr, fixmap_idx);
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}
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}
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/* Check the top-level record header has an appropriate size. */
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static int __ghes_check_estatus(struct ghes *ghes,
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struct acpi_hest_generic_status *estatus)
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{
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u32 len = cper_estatus_len(estatus);
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if (len < sizeof(*estatus)) {
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pr_warn_ratelimited(FW_WARN GHES_PFX "Truncated error status block!\n");
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return -EIO;
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}
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if (len > ghes->generic->error_block_length) {
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pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid error status block length!\n");
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return -EIO;
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}
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if (cper_estatus_check_header(estatus)) {
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pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid CPER header!\n");
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return -EIO;
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}
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return 0;
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}
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/* Read the CPER block, returning its address, and header in estatus. */
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static int __ghes_peek_estatus(struct ghes *ghes,
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struct acpi_hest_generic_status *estatus,
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u64 *buf_paddr, enum fixed_addresses fixmap_idx)
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{
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struct acpi_hest_generic *g = ghes->generic;
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int rc;
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rc = apei_read(buf_paddr, &g->error_status_address);
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if (rc) {
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*buf_paddr = 0;
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pr_warn_ratelimited(FW_WARN GHES_PFX
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"Failed to read error status block address for hardware error source: %d.\n",
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g->header.source_id);
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return -EIO;
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}
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if (!*buf_paddr)
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return -ENOENT;
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ghes_copy_tofrom_phys(estatus, *buf_paddr, sizeof(*estatus), 1,
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fixmap_idx);
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if (!estatus->block_status) {
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*buf_paddr = 0;
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return -ENOENT;
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}
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return 0;
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}
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static int __ghes_read_estatus(struct acpi_hest_generic_status *estatus,
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u64 buf_paddr, enum fixed_addresses fixmap_idx,
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size_t buf_len)
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{
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ghes_copy_tofrom_phys(estatus, buf_paddr, buf_len, 1, fixmap_idx);
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if (cper_estatus_check(estatus)) {
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pr_warn_ratelimited(FW_WARN GHES_PFX
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"Failed to read error status block!\n");
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return -EIO;
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}
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return 0;
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}
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static int ghes_read_estatus(struct ghes *ghes,
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struct acpi_hest_generic_status *estatus,
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u64 *buf_paddr, enum fixed_addresses fixmap_idx)
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{
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int rc;
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rc = __ghes_peek_estatus(ghes, estatus, buf_paddr, fixmap_idx);
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if (rc)
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return rc;
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rc = __ghes_check_estatus(ghes, estatus);
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if (rc)
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return rc;
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return __ghes_read_estatus(estatus, *buf_paddr, fixmap_idx,
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cper_estatus_len(estatus));
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}
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static void ghes_clear_estatus(struct ghes *ghes,
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struct acpi_hest_generic_status *estatus,
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u64 buf_paddr, enum fixed_addresses fixmap_idx)
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{
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estatus->block_status = 0;
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if (!buf_paddr)
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return;
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ghes_copy_tofrom_phys(estatus, buf_paddr,
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sizeof(estatus->block_status), 0,
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fixmap_idx);
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/*
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* GHESv2 type HEST entries introduce support for error acknowledgment,
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* so only acknowledge the error if this support is present.
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*/
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if (is_hest_type_generic_v2(ghes))
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ghes_ack_error(ghes->generic_v2);
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}
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/*
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* Called as task_work before returning to user-space.
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* Ensure any queued work has been done before we return to the context that
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* triggered the notification.
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*/
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static void ghes_kick_task_work(struct callback_head *head)
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{
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struct acpi_hest_generic_status *estatus;
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struct ghes_estatus_node *estatus_node;
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u32 node_len;
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estatus_node = container_of(head, struct ghes_estatus_node, task_work);
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if (IS_ENABLED(CONFIG_ACPI_APEI_MEMORY_FAILURE))
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memory_failure_queue_kick(estatus_node->task_work_cpu);
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estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
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node_len = GHES_ESTATUS_NODE_LEN(cper_estatus_len(estatus));
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gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node, node_len);
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}
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static bool ghes_do_memory_failure(u64 physical_addr, int flags)
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{
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unsigned long pfn;
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|
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if (!IS_ENABLED(CONFIG_ACPI_APEI_MEMORY_FAILURE))
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return false;
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pfn = PHYS_PFN(physical_addr);
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if (!pfn_valid(pfn) && !arch_is_platform_page(physical_addr)) {
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pr_warn_ratelimited(FW_WARN GHES_PFX
|
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"Invalid address in generic error data: %#llx\n",
|
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physical_addr);
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return false;
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}
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|
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memory_failure_queue(pfn, flags);
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return true;
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}
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static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata,
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int sev)
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{
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int flags = -1;
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int sec_sev = ghes_severity(gdata->error_severity);
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struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
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|
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if (!(mem_err->validation_bits & CPER_MEM_VALID_PA))
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return false;
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|
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/* iff following two events can be handled properly by now */
|
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if (sec_sev == GHES_SEV_CORRECTED &&
|
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(gdata->flags & CPER_SEC_ERROR_THRESHOLD_EXCEEDED))
|
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flags = MF_SOFT_OFFLINE;
|
|
if (sev == GHES_SEV_RECOVERABLE && sec_sev == GHES_SEV_RECOVERABLE)
|
|
flags = 0;
|
|
|
|
if (flags != -1)
|
|
return ghes_do_memory_failure(mem_err->physical_addr, flags);
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int sev)
|
|
{
|
|
struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
|
|
bool queued = false;
|
|
int sec_sev, i;
|
|
char *p;
|
|
|
|
log_arm_hw_error(err);
|
|
|
|
sec_sev = ghes_severity(gdata->error_severity);
|
|
if (sev != GHES_SEV_RECOVERABLE || sec_sev != GHES_SEV_RECOVERABLE)
|
|
return false;
|
|
|
|
p = (char *)(err + 1);
|
|
for (i = 0; i < err->err_info_num; i++) {
|
|
struct cper_arm_err_info *err_info = (struct cper_arm_err_info *)p;
|
|
bool is_cache = (err_info->type == CPER_ARM_CACHE_ERROR);
|
|
bool has_pa = (err_info->validation_bits & CPER_ARM_INFO_VALID_PHYSICAL_ADDR);
|
|
const char *error_type = "unknown error";
|
|
|
|
/*
|
|
* The field (err_info->error_info & BIT(26)) is fixed to set to
|
|
* 1 in some old firmware of HiSilicon Kunpeng920. We assume that
|
|
* firmware won't mix corrected errors in an uncorrected section,
|
|
* and don't filter out 'corrected' error here.
|
|
*/
|
|
if (is_cache && has_pa) {
|
|
queued = ghes_do_memory_failure(err_info->physical_fault_addr, 0);
|
|
p += err_info->length;
|
|
continue;
|
|
}
|
|
|
|
if (err_info->type < ARRAY_SIZE(cper_proc_error_type_strs))
|
|
error_type = cper_proc_error_type_strs[err_info->type];
|
|
|
|
pr_warn_ratelimited(FW_WARN GHES_PFX
|
|
"Unhandled processor error type: %s\n",
|
|
error_type);
|
|
p += err_info->length;
|
|
}
|
|
|
|
return queued;
|
|
}
|
|
|
|
/*
|
|
* PCIe AER errors need to be sent to the AER driver for reporting and
|
|
* recovery. The GHES severities map to the following AER severities and
|
|
* require the following handling:
|
|
*
|
|
* GHES_SEV_CORRECTABLE -> AER_CORRECTABLE
|
|
* These need to be reported by the AER driver but no recovery is
|
|
* necessary.
|
|
* GHES_SEV_RECOVERABLE -> AER_NONFATAL
|
|
* GHES_SEV_RECOVERABLE && CPER_SEC_RESET -> AER_FATAL
|
|
* These both need to be reported and recovered from by the AER driver.
|
|
* GHES_SEV_PANIC does not make it to this handling since the kernel must
|
|
* panic.
|
|
*/
|
|
static void ghes_handle_aer(struct acpi_hest_generic_data *gdata)
|
|
{
|
|
#ifdef CONFIG_ACPI_APEI_PCIEAER
|
|
struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata);
|
|
|
|
if (pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
|
|
pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) {
|
|
unsigned int devfn;
|
|
int aer_severity;
|
|
|
|
devfn = PCI_DEVFN(pcie_err->device_id.device,
|
|
pcie_err->device_id.function);
|
|
aer_severity = cper_severity_to_aer(gdata->error_severity);
|
|
|
|
/*
|
|
* If firmware reset the component to contain
|
|
* the error, we must reinitialize it before
|
|
* use, so treat it as a fatal AER error.
|
|
*/
|
|
if (gdata->flags & CPER_SEC_RESET)
|
|
aer_severity = AER_FATAL;
|
|
|
|
aer_recover_queue(pcie_err->device_id.segment,
|
|
pcie_err->device_id.bus,
|
|
devfn, aer_severity,
|
|
(struct aer_capability_regs *)
|
|
pcie_err->aer_info);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static BLOCKING_NOTIFIER_HEAD(vendor_record_notify_list);
|
|
|
|
int ghes_register_vendor_record_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&vendor_record_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ghes_register_vendor_record_notifier);
|
|
|
|
void ghes_unregister_vendor_record_notifier(struct notifier_block *nb)
|
|
{
|
|
blocking_notifier_chain_unregister(&vendor_record_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ghes_unregister_vendor_record_notifier);
|
|
|
|
static void ghes_vendor_record_work_func(struct work_struct *work)
|
|
{
|
|
struct ghes_vendor_record_entry *entry;
|
|
struct acpi_hest_generic_data *gdata;
|
|
u32 len;
|
|
|
|
entry = container_of(work, struct ghes_vendor_record_entry, work);
|
|
gdata = GHES_GDATA_FROM_VENDOR_ENTRY(entry);
|
|
|
|
blocking_notifier_call_chain(&vendor_record_notify_list,
|
|
entry->error_severity, gdata);
|
|
|
|
len = GHES_VENDOR_ENTRY_LEN(acpi_hest_get_record_size(gdata));
|
|
gen_pool_free(ghes_estatus_pool, (unsigned long)entry, len);
|
|
}
|
|
|
|
static void ghes_defer_non_standard_event(struct acpi_hest_generic_data *gdata,
|
|
int sev)
|
|
{
|
|
struct acpi_hest_generic_data *copied_gdata;
|
|
struct ghes_vendor_record_entry *entry;
|
|
u32 len;
|
|
|
|
len = GHES_VENDOR_ENTRY_LEN(acpi_hest_get_record_size(gdata));
|
|
entry = (void *)gen_pool_alloc(ghes_estatus_pool, len);
|
|
if (!entry)
|
|
return;
|
|
|
|
copied_gdata = GHES_GDATA_FROM_VENDOR_ENTRY(entry);
|
|
memcpy(copied_gdata, gdata, acpi_hest_get_record_size(gdata));
|
|
entry->error_severity = sev;
|
|
|
|
INIT_WORK(&entry->work, ghes_vendor_record_work_func);
|
|
schedule_work(&entry->work);
|
|
}
|
|
|
|
static bool ghes_do_proc(struct ghes *ghes,
|
|
const struct acpi_hest_generic_status *estatus)
|
|
{
|
|
int sev, sec_sev;
|
|
struct acpi_hest_generic_data *gdata;
|
|
guid_t *sec_type;
|
|
const guid_t *fru_id = &guid_null;
|
|
char *fru_text = "";
|
|
bool queued = false;
|
|
|
|
sev = ghes_severity(estatus->error_severity);
|
|
apei_estatus_for_each_section(estatus, gdata) {
|
|
sec_type = (guid_t *)gdata->section_type;
|
|
sec_sev = ghes_severity(gdata->error_severity);
|
|
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
|
|
fru_id = (guid_t *)gdata->fru_id;
|
|
|
|
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
|
|
fru_text = gdata->fru_text;
|
|
|
|
if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
|
|
struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
|
|
|
|
ghes_edac_report_mem_error(sev, mem_err);
|
|
|
|
arch_apei_report_mem_error(sev, mem_err);
|
|
queued = ghes_handle_memory_failure(gdata, sev);
|
|
}
|
|
else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
|
|
ghes_handle_aer(gdata);
|
|
}
|
|
else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
|
|
queued = ghes_handle_arm_hw_error(gdata, sev);
|
|
} else {
|
|
void *err = acpi_hest_get_payload(gdata);
|
|
|
|
ghes_defer_non_standard_event(gdata, sev);
|
|
log_non_standard_event(sec_type, fru_id, fru_text,
|
|
sec_sev, err,
|
|
gdata->error_data_length);
|
|
}
|
|
}
|
|
|
|
return queued;
|
|
}
|
|
|
|
static void __ghes_print_estatus(const char *pfx,
|
|
const struct acpi_hest_generic *generic,
|
|
const struct acpi_hest_generic_status *estatus)
|
|
{
|
|
static atomic_t seqno;
|
|
unsigned int curr_seqno;
|
|
char pfx_seq[64];
|
|
|
|
if (pfx == NULL) {
|
|
if (ghes_severity(estatus->error_severity) <=
|
|
GHES_SEV_CORRECTED)
|
|
pfx = KERN_WARNING;
|
|
else
|
|
pfx = KERN_ERR;
|
|
}
|
|
curr_seqno = atomic_inc_return(&seqno);
|
|
snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}" HW_ERR, pfx, curr_seqno);
|
|
printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
|
|
pfx_seq, generic->header.source_id);
|
|
cper_estatus_print(pfx_seq, estatus);
|
|
}
|
|
|
|
static int ghes_print_estatus(const char *pfx,
|
|
const struct acpi_hest_generic *generic,
|
|
const struct acpi_hest_generic_status *estatus)
|
|
{
|
|
/* Not more than 2 messages every 5 seconds */
|
|
static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2);
|
|
static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2);
|
|
struct ratelimit_state *ratelimit;
|
|
|
|
if (ghes_severity(estatus->error_severity) <= GHES_SEV_CORRECTED)
|
|
ratelimit = &ratelimit_corrected;
|
|
else
|
|
ratelimit = &ratelimit_uncorrected;
|
|
if (__ratelimit(ratelimit)) {
|
|
__ghes_print_estatus(pfx, generic, estatus);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* GHES error status reporting throttle, to report more kinds of
|
|
* errors, instead of just most frequently occurred errors.
|
|
*/
|
|
static int ghes_estatus_cached(struct acpi_hest_generic_status *estatus)
|
|
{
|
|
u32 len;
|
|
int i, cached = 0;
|
|
unsigned long long now;
|
|
struct ghes_estatus_cache *cache;
|
|
struct acpi_hest_generic_status *cache_estatus;
|
|
|
|
len = cper_estatus_len(estatus);
|
|
rcu_read_lock();
|
|
for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) {
|
|
cache = rcu_dereference(ghes_estatus_caches[i]);
|
|
if (cache == NULL)
|
|
continue;
|
|
if (len != cache->estatus_len)
|
|
continue;
|
|
cache_estatus = GHES_ESTATUS_FROM_CACHE(cache);
|
|
if (memcmp(estatus, cache_estatus, len))
|
|
continue;
|
|
atomic_inc(&cache->count);
|
|
now = sched_clock();
|
|
if (now - cache->time_in < GHES_ESTATUS_IN_CACHE_MAX_NSEC)
|
|
cached = 1;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
return cached;
|
|
}
|
|
|
|
static struct ghes_estatus_cache *ghes_estatus_cache_alloc(
|
|
struct acpi_hest_generic *generic,
|
|
struct acpi_hest_generic_status *estatus)
|
|
{
|
|
int alloced;
|
|
u32 len, cache_len;
|
|
struct ghes_estatus_cache *cache;
|
|
struct acpi_hest_generic_status *cache_estatus;
|
|
|
|
alloced = atomic_add_return(1, &ghes_estatus_cache_alloced);
|
|
if (alloced > GHES_ESTATUS_CACHE_ALLOCED_MAX) {
|
|
atomic_dec(&ghes_estatus_cache_alloced);
|
|
return NULL;
|
|
}
|
|
len = cper_estatus_len(estatus);
|
|
cache_len = GHES_ESTATUS_CACHE_LEN(len);
|
|
cache = (void *)gen_pool_alloc(ghes_estatus_pool, cache_len);
|
|
if (!cache) {
|
|
atomic_dec(&ghes_estatus_cache_alloced);
|
|
return NULL;
|
|
}
|
|
cache_estatus = GHES_ESTATUS_FROM_CACHE(cache);
|
|
memcpy(cache_estatus, estatus, len);
|
|
cache->estatus_len = len;
|
|
atomic_set(&cache->count, 0);
|
|
cache->generic = generic;
|
|
cache->time_in = sched_clock();
|
|
return cache;
|
|
}
|
|
|
|
static void ghes_estatus_cache_free(struct ghes_estatus_cache *cache)
|
|
{
|
|
u32 len;
|
|
|
|
len = cper_estatus_len(GHES_ESTATUS_FROM_CACHE(cache));
|
|
len = GHES_ESTATUS_CACHE_LEN(len);
|
|
gen_pool_free(ghes_estatus_pool, (unsigned long)cache, len);
|
|
atomic_dec(&ghes_estatus_cache_alloced);
|
|
}
|
|
|
|
static void ghes_estatus_cache_rcu_free(struct rcu_head *head)
|
|
{
|
|
struct ghes_estatus_cache *cache;
|
|
|
|
cache = container_of(head, struct ghes_estatus_cache, rcu);
|
|
ghes_estatus_cache_free(cache);
|
|
}
|
|
|
|
static void ghes_estatus_cache_add(
|
|
struct acpi_hest_generic *generic,
|
|
struct acpi_hest_generic_status *estatus)
|
|
{
|
|
int i, slot = -1, count;
|
|
unsigned long long now, duration, period, max_period = 0;
|
|
struct ghes_estatus_cache *cache, *slot_cache = NULL, *new_cache;
|
|
|
|
new_cache = ghes_estatus_cache_alloc(generic, estatus);
|
|
if (new_cache == NULL)
|
|
return;
|
|
rcu_read_lock();
|
|
now = sched_clock();
|
|
for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) {
|
|
cache = rcu_dereference(ghes_estatus_caches[i]);
|
|
if (cache == NULL) {
|
|
slot = i;
|
|
slot_cache = NULL;
|
|
break;
|
|
}
|
|
duration = now - cache->time_in;
|
|
if (duration >= GHES_ESTATUS_IN_CACHE_MAX_NSEC) {
|
|
slot = i;
|
|
slot_cache = cache;
|
|
break;
|
|
}
|
|
count = atomic_read(&cache->count);
|
|
period = duration;
|
|
do_div(period, (count + 1));
|
|
if (period > max_period) {
|
|
max_period = period;
|
|
slot = i;
|
|
slot_cache = cache;
|
|
}
|
|
}
|
|
/* new_cache must be put into array after its contents are written */
|
|
smp_wmb();
|
|
if (slot != -1 && cmpxchg(ghes_estatus_caches + slot,
|
|
slot_cache, new_cache) == slot_cache) {
|
|
if (slot_cache)
|
|
call_rcu(&slot_cache->rcu, ghes_estatus_cache_rcu_free);
|
|
} else
|
|
ghes_estatus_cache_free(new_cache);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void __ghes_panic(struct ghes *ghes,
|
|
struct acpi_hest_generic_status *estatus,
|
|
u64 buf_paddr, enum fixed_addresses fixmap_idx)
|
|
{
|
|
__ghes_print_estatus(KERN_EMERG, ghes->generic, estatus);
|
|
|
|
ghes_clear_estatus(ghes, estatus, buf_paddr, fixmap_idx);
|
|
|
|
/* reboot to log the error! */
|
|
if (!panic_timeout)
|
|
panic_timeout = ghes_panic_timeout;
|
|
panic("Fatal hardware error!");
|
|
}
|
|
|
|
static int ghes_proc(struct ghes *ghes)
|
|
{
|
|
struct acpi_hest_generic_status *estatus = ghes->estatus;
|
|
u64 buf_paddr;
|
|
int rc;
|
|
|
|
rc = ghes_read_estatus(ghes, estatus, &buf_paddr, FIX_APEI_GHES_IRQ);
|
|
if (rc)
|
|
goto out;
|
|
|
|
if (ghes_severity(estatus->error_severity) >= GHES_SEV_PANIC)
|
|
__ghes_panic(ghes, estatus, buf_paddr, FIX_APEI_GHES_IRQ);
|
|
|
|
if (!ghes_estatus_cached(estatus)) {
|
|
if (ghes_print_estatus(NULL, ghes->generic, estatus))
|
|
ghes_estatus_cache_add(ghes->generic, estatus);
|
|
}
|
|
ghes_do_proc(ghes, estatus);
|
|
|
|
out:
|
|
ghes_clear_estatus(ghes, estatus, buf_paddr, FIX_APEI_GHES_IRQ);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void ghes_add_timer(struct ghes *ghes)
|
|
{
|
|
struct acpi_hest_generic *g = ghes->generic;
|
|
unsigned long expire;
|
|
|
|
if (!g->notify.poll_interval) {
|
|
pr_warn(FW_WARN GHES_PFX "Poll interval is 0 for generic hardware error source: %d, disabled.\n",
|
|
g->header.source_id);
|
|
return;
|
|
}
|
|
expire = jiffies + msecs_to_jiffies(g->notify.poll_interval);
|
|
ghes->timer.expires = round_jiffies_relative(expire);
|
|
add_timer(&ghes->timer);
|
|
}
|
|
|
|
static void ghes_poll_func(struct timer_list *t)
|
|
{
|
|
struct ghes *ghes = from_timer(ghes, t, timer);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ghes_notify_lock_irq, flags);
|
|
ghes_proc(ghes);
|
|
spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
|
|
if (!(ghes->flags & GHES_EXITING))
|
|
ghes_add_timer(ghes);
|
|
}
|
|
|
|
static irqreturn_t ghes_irq_func(int irq, void *data)
|
|
{
|
|
struct ghes *ghes = data;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
spin_lock_irqsave(&ghes_notify_lock_irq, flags);
|
|
rc = ghes_proc(ghes);
|
|
spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
|
|
if (rc)
|
|
return IRQ_NONE;
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int ghes_notify_hed(struct notifier_block *this, unsigned long event,
|
|
void *data)
|
|
{
|
|
struct ghes *ghes;
|
|
unsigned long flags;
|
|
int ret = NOTIFY_DONE;
|
|
|
|
spin_lock_irqsave(&ghes_notify_lock_irq, flags);
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(ghes, &ghes_hed, list) {
|
|
if (!ghes_proc(ghes))
|
|
ret = NOTIFY_OK;
|
|
}
|
|
rcu_read_unlock();
|
|
spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct notifier_block ghes_notifier_hed = {
|
|
.notifier_call = ghes_notify_hed,
|
|
};
|
|
|
|
/*
|
|
* Handlers for CPER records may not be NMI safe. For example,
|
|
* memory_failure_queue() takes spinlocks and calls schedule_work_on().
|
|
* In any NMI-like handler, memory from ghes_estatus_pool is used to save
|
|
* estatus, and added to the ghes_estatus_llist. irq_work_queue() causes
|
|
* ghes_proc_in_irq() to run in IRQ context where each estatus in
|
|
* ghes_estatus_llist is processed.
|
|
*
|
|
* Memory from the ghes_estatus_pool is also used with the ghes_estatus_cache
|
|
* to suppress frequent messages.
|
|
*/
|
|
static struct llist_head ghes_estatus_llist;
|
|
static struct irq_work ghes_proc_irq_work;
|
|
|
|
static void ghes_proc_in_irq(struct irq_work *irq_work)
|
|
{
|
|
struct llist_node *llnode, *next;
|
|
struct ghes_estatus_node *estatus_node;
|
|
struct acpi_hest_generic *generic;
|
|
struct acpi_hest_generic_status *estatus;
|
|
bool task_work_pending;
|
|
u32 len, node_len;
|
|
int ret;
|
|
|
|
llnode = llist_del_all(&ghes_estatus_llist);
|
|
/*
|
|
* Because the time order of estatus in list is reversed,
|
|
* revert it back to proper order.
|
|
*/
|
|
llnode = llist_reverse_order(llnode);
|
|
while (llnode) {
|
|
next = llnode->next;
|
|
estatus_node = llist_entry(llnode, struct ghes_estatus_node,
|
|
llnode);
|
|
estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
|
|
len = cper_estatus_len(estatus);
|
|
node_len = GHES_ESTATUS_NODE_LEN(len);
|
|
task_work_pending = ghes_do_proc(estatus_node->ghes, estatus);
|
|
if (!ghes_estatus_cached(estatus)) {
|
|
generic = estatus_node->generic;
|
|
if (ghes_print_estatus(NULL, generic, estatus))
|
|
ghes_estatus_cache_add(generic, estatus);
|
|
}
|
|
|
|
if (task_work_pending && current->mm != &init_mm) {
|
|
estatus_node->task_work.func = ghes_kick_task_work;
|
|
estatus_node->task_work_cpu = smp_processor_id();
|
|
ret = task_work_add(current, &estatus_node->task_work,
|
|
TWA_RESUME);
|
|
if (ret)
|
|
estatus_node->task_work.func = NULL;
|
|
}
|
|
|
|
if (!estatus_node->task_work.func)
|
|
gen_pool_free(ghes_estatus_pool,
|
|
(unsigned long)estatus_node, node_len);
|
|
|
|
llnode = next;
|
|
}
|
|
}
|
|
|
|
static void ghes_print_queued_estatus(void)
|
|
{
|
|
struct llist_node *llnode;
|
|
struct ghes_estatus_node *estatus_node;
|
|
struct acpi_hest_generic *generic;
|
|
struct acpi_hest_generic_status *estatus;
|
|
|
|
llnode = llist_del_all(&ghes_estatus_llist);
|
|
/*
|
|
* Because the time order of estatus in list is reversed,
|
|
* revert it back to proper order.
|
|
*/
|
|
llnode = llist_reverse_order(llnode);
|
|
while (llnode) {
|
|
estatus_node = llist_entry(llnode, struct ghes_estatus_node,
|
|
llnode);
|
|
estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
|
|
generic = estatus_node->generic;
|
|
ghes_print_estatus(NULL, generic, estatus);
|
|
llnode = llnode->next;
|
|
}
|
|
}
|
|
|
|
static int ghes_in_nmi_queue_one_entry(struct ghes *ghes,
|
|
enum fixed_addresses fixmap_idx)
|
|
{
|
|
struct acpi_hest_generic_status *estatus, tmp_header;
|
|
struct ghes_estatus_node *estatus_node;
|
|
u32 len, node_len;
|
|
u64 buf_paddr;
|
|
int sev, rc;
|
|
|
|
if (!IS_ENABLED(CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG))
|
|
return -EOPNOTSUPP;
|
|
|
|
rc = __ghes_peek_estatus(ghes, &tmp_header, &buf_paddr, fixmap_idx);
|
|
if (rc) {
|
|
ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
|
|
return rc;
|
|
}
|
|
|
|
rc = __ghes_check_estatus(ghes, &tmp_header);
|
|
if (rc) {
|
|
ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
|
|
return rc;
|
|
}
|
|
|
|
len = cper_estatus_len(&tmp_header);
|
|
node_len = GHES_ESTATUS_NODE_LEN(len);
|
|
estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool, node_len);
|
|
if (!estatus_node)
|
|
return -ENOMEM;
|
|
|
|
estatus_node->ghes = ghes;
|
|
estatus_node->generic = ghes->generic;
|
|
estatus_node->task_work.func = NULL;
|
|
estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
|
|
|
|
if (__ghes_read_estatus(estatus, buf_paddr, fixmap_idx, len)) {
|
|
ghes_clear_estatus(ghes, estatus, buf_paddr, fixmap_idx);
|
|
rc = -ENOENT;
|
|
goto no_work;
|
|
}
|
|
|
|
sev = ghes_severity(estatus->error_severity);
|
|
if (sev >= GHES_SEV_PANIC) {
|
|
ghes_print_queued_estatus();
|
|
__ghes_panic(ghes, estatus, buf_paddr, fixmap_idx);
|
|
}
|
|
|
|
ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
|
|
|
|
/* This error has been reported before, don't process it again. */
|
|
if (ghes_estatus_cached(estatus))
|
|
goto no_work;
|
|
|
|
llist_add(&estatus_node->llnode, &ghes_estatus_llist);
|
|
|
|
return rc;
|
|
|
|
no_work:
|
|
gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node,
|
|
node_len);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ghes_in_nmi_spool_from_list(struct list_head *rcu_list,
|
|
enum fixed_addresses fixmap_idx)
|
|
{
|
|
int ret = -ENOENT;
|
|
struct ghes *ghes;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(ghes, rcu_list, list) {
|
|
if (!ghes_in_nmi_queue_one_entry(ghes, fixmap_idx))
|
|
ret = 0;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (IS_ENABLED(CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG) && !ret)
|
|
irq_work_queue(&ghes_proc_irq_work);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_APEI_SEA
|
|
static LIST_HEAD(ghes_sea);
|
|
|
|
/*
|
|
* Return 0 only if one of the SEA error sources successfully reported an error
|
|
* record sent from the firmware.
|
|
*/
|
|
int ghes_notify_sea(void)
|
|
{
|
|
static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sea);
|
|
int rv;
|
|
|
|
raw_spin_lock(&ghes_notify_lock_sea);
|
|
rv = ghes_in_nmi_spool_from_list(&ghes_sea, FIX_APEI_GHES_SEA);
|
|
raw_spin_unlock(&ghes_notify_lock_sea);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void ghes_sea_add(struct ghes *ghes)
|
|
{
|
|
mutex_lock(&ghes_list_mutex);
|
|
list_add_rcu(&ghes->list, &ghes_sea);
|
|
mutex_unlock(&ghes_list_mutex);
|
|
}
|
|
|
|
static void ghes_sea_remove(struct ghes *ghes)
|
|
{
|
|
mutex_lock(&ghes_list_mutex);
|
|
list_del_rcu(&ghes->list);
|
|
mutex_unlock(&ghes_list_mutex);
|
|
synchronize_rcu();
|
|
}
|
|
#else /* CONFIG_ACPI_APEI_SEA */
|
|
static inline void ghes_sea_add(struct ghes *ghes) { }
|
|
static inline void ghes_sea_remove(struct ghes *ghes) { }
|
|
#endif /* CONFIG_ACPI_APEI_SEA */
|
|
|
|
#ifdef CONFIG_HAVE_ACPI_APEI_NMI
|
|
/*
|
|
* NMI may be triggered on any CPU, so ghes_in_nmi is used for
|
|
* having only one concurrent reader.
|
|
*/
|
|
static atomic_t ghes_in_nmi = ATOMIC_INIT(0);
|
|
|
|
static LIST_HEAD(ghes_nmi);
|
|
|
|
static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
|
|
{
|
|
static DEFINE_RAW_SPINLOCK(ghes_notify_lock_nmi);
|
|
int ret = NMI_DONE;
|
|
|
|
if (!atomic_add_unless(&ghes_in_nmi, 1, 1))
|
|
return ret;
|
|
|
|
raw_spin_lock(&ghes_notify_lock_nmi);
|
|
if (!ghes_in_nmi_spool_from_list(&ghes_nmi, FIX_APEI_GHES_NMI))
|
|
ret = NMI_HANDLED;
|
|
raw_spin_unlock(&ghes_notify_lock_nmi);
|
|
|
|
atomic_dec(&ghes_in_nmi);
|
|
return ret;
|
|
}
|
|
|
|
static void ghes_nmi_add(struct ghes *ghes)
|
|
{
|
|
mutex_lock(&ghes_list_mutex);
|
|
if (list_empty(&ghes_nmi))
|
|
register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0, "ghes");
|
|
list_add_rcu(&ghes->list, &ghes_nmi);
|
|
mutex_unlock(&ghes_list_mutex);
|
|
}
|
|
|
|
static void ghes_nmi_remove(struct ghes *ghes)
|
|
{
|
|
mutex_lock(&ghes_list_mutex);
|
|
list_del_rcu(&ghes->list);
|
|
if (list_empty(&ghes_nmi))
|
|
unregister_nmi_handler(NMI_LOCAL, "ghes");
|
|
mutex_unlock(&ghes_list_mutex);
|
|
/*
|
|
* To synchronize with NMI handler, ghes can only be
|
|
* freed after NMI handler finishes.
|
|
*/
|
|
synchronize_rcu();
|
|
}
|
|
#else /* CONFIG_HAVE_ACPI_APEI_NMI */
|
|
static inline void ghes_nmi_add(struct ghes *ghes) { }
|
|
static inline void ghes_nmi_remove(struct ghes *ghes) { }
|
|
#endif /* CONFIG_HAVE_ACPI_APEI_NMI */
|
|
|
|
static void ghes_nmi_init_cxt(void)
|
|
{
|
|
init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
|
|
}
|
|
|
|
static int __ghes_sdei_callback(struct ghes *ghes,
|
|
enum fixed_addresses fixmap_idx)
|
|
{
|
|
if (!ghes_in_nmi_queue_one_entry(ghes, fixmap_idx)) {
|
|
irq_work_queue(&ghes_proc_irq_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int ghes_sdei_normal_callback(u32 event_num, struct pt_regs *regs,
|
|
void *arg)
|
|
{
|
|
static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sdei_normal);
|
|
struct ghes *ghes = arg;
|
|
int err;
|
|
|
|
raw_spin_lock(&ghes_notify_lock_sdei_normal);
|
|
err = __ghes_sdei_callback(ghes, FIX_APEI_GHES_SDEI_NORMAL);
|
|
raw_spin_unlock(&ghes_notify_lock_sdei_normal);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ghes_sdei_critical_callback(u32 event_num, struct pt_regs *regs,
|
|
void *arg)
|
|
{
|
|
static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sdei_critical);
|
|
struct ghes *ghes = arg;
|
|
int err;
|
|
|
|
raw_spin_lock(&ghes_notify_lock_sdei_critical);
|
|
err = __ghes_sdei_callback(ghes, FIX_APEI_GHES_SDEI_CRITICAL);
|
|
raw_spin_unlock(&ghes_notify_lock_sdei_critical);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int apei_sdei_register_ghes(struct ghes *ghes)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
|
|
return -EOPNOTSUPP;
|
|
|
|
return sdei_register_ghes(ghes, ghes_sdei_normal_callback,
|
|
ghes_sdei_critical_callback);
|
|
}
|
|
|
|
static int apei_sdei_unregister_ghes(struct ghes *ghes)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
|
|
return -EOPNOTSUPP;
|
|
|
|
return sdei_unregister_ghes(ghes);
|
|
}
|
|
|
|
static int ghes_probe(struct platform_device *ghes_dev)
|
|
{
|
|
struct acpi_hest_generic *generic;
|
|
struct ghes *ghes = NULL;
|
|
unsigned long flags;
|
|
|
|
int rc = -EINVAL;
|
|
|
|
generic = *(struct acpi_hest_generic **)ghes_dev->dev.platform_data;
|
|
if (!generic->enabled)
|
|
return -ENODEV;
|
|
|
|
switch (generic->notify.type) {
|
|
case ACPI_HEST_NOTIFY_POLLED:
|
|
case ACPI_HEST_NOTIFY_EXTERNAL:
|
|
case ACPI_HEST_NOTIFY_SCI:
|
|
case ACPI_HEST_NOTIFY_GSIV:
|
|
case ACPI_HEST_NOTIFY_GPIO:
|
|
break;
|
|
|
|
case ACPI_HEST_NOTIFY_SEA:
|
|
if (!IS_ENABLED(CONFIG_ACPI_APEI_SEA)) {
|
|
pr_warn(GHES_PFX "Generic hardware error source: %d notified via SEA is not supported\n",
|
|
generic->header.source_id);
|
|
rc = -ENOTSUPP;
|
|
goto err;
|
|
}
|
|
break;
|
|
case ACPI_HEST_NOTIFY_NMI:
|
|
if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) {
|
|
pr_warn(GHES_PFX "Generic hardware error source: %d notified via NMI interrupt is not supported!\n",
|
|
generic->header.source_id);
|
|
goto err;
|
|
}
|
|
break;
|
|
case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
|
|
if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE)) {
|
|
pr_warn(GHES_PFX "Generic hardware error source: %d notified via SDE Interface is not supported!\n",
|
|
generic->header.source_id);
|
|
goto err;
|
|
}
|
|
break;
|
|
case ACPI_HEST_NOTIFY_LOCAL:
|
|
pr_warn(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n",
|
|
generic->header.source_id);
|
|
goto err;
|
|
default:
|
|
pr_warn(FW_WARN GHES_PFX "Unknown notification type: %u for generic hardware error source: %d\n",
|
|
generic->notify.type, generic->header.source_id);
|
|
goto err;
|
|
}
|
|
|
|
rc = -EIO;
|
|
if (generic->error_block_length <
|
|
sizeof(struct acpi_hest_generic_status)) {
|
|
pr_warn(FW_BUG GHES_PFX "Invalid error block length: %u for generic hardware error source: %d\n",
|
|
generic->error_block_length, generic->header.source_id);
|
|
goto err;
|
|
}
|
|
ghes = ghes_new(generic);
|
|
if (IS_ERR(ghes)) {
|
|
rc = PTR_ERR(ghes);
|
|
ghes = NULL;
|
|
goto err;
|
|
}
|
|
|
|
switch (generic->notify.type) {
|
|
case ACPI_HEST_NOTIFY_POLLED:
|
|
timer_setup(&ghes->timer, ghes_poll_func, 0);
|
|
ghes_add_timer(ghes);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_EXTERNAL:
|
|
/* External interrupt vector is GSI */
|
|
rc = acpi_gsi_to_irq(generic->notify.vector, &ghes->irq);
|
|
if (rc) {
|
|
pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n",
|
|
generic->header.source_id);
|
|
goto err;
|
|
}
|
|
rc = request_irq(ghes->irq, ghes_irq_func, IRQF_SHARED,
|
|
"GHES IRQ", ghes);
|
|
if (rc) {
|
|
pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n",
|
|
generic->header.source_id);
|
|
goto err;
|
|
}
|
|
break;
|
|
|
|
case ACPI_HEST_NOTIFY_SCI:
|
|
case ACPI_HEST_NOTIFY_GSIV:
|
|
case ACPI_HEST_NOTIFY_GPIO:
|
|
mutex_lock(&ghes_list_mutex);
|
|
if (list_empty(&ghes_hed))
|
|
register_acpi_hed_notifier(&ghes_notifier_hed);
|
|
list_add_rcu(&ghes->list, &ghes_hed);
|
|
mutex_unlock(&ghes_list_mutex);
|
|
break;
|
|
|
|
case ACPI_HEST_NOTIFY_SEA:
|
|
ghes_sea_add(ghes);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_NMI:
|
|
ghes_nmi_add(ghes);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
|
|
rc = apei_sdei_register_ghes(ghes);
|
|
if (rc)
|
|
goto err;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
platform_set_drvdata(ghes_dev, ghes);
|
|
|
|
ghes_edac_register(ghes, &ghes_dev->dev);
|
|
|
|
/* Handle any pending errors right away */
|
|
spin_lock_irqsave(&ghes_notify_lock_irq, flags);
|
|
ghes_proc(ghes);
|
|
spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
if (ghes) {
|
|
ghes_fini(ghes);
|
|
kfree(ghes);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int ghes_remove(struct platform_device *ghes_dev)
|
|
{
|
|
int rc;
|
|
struct ghes *ghes;
|
|
struct acpi_hest_generic *generic;
|
|
|
|
ghes = platform_get_drvdata(ghes_dev);
|
|
generic = ghes->generic;
|
|
|
|
ghes->flags |= GHES_EXITING;
|
|
switch (generic->notify.type) {
|
|
case ACPI_HEST_NOTIFY_POLLED:
|
|
del_timer_sync(&ghes->timer);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_EXTERNAL:
|
|
free_irq(ghes->irq, ghes);
|
|
break;
|
|
|
|
case ACPI_HEST_NOTIFY_SCI:
|
|
case ACPI_HEST_NOTIFY_GSIV:
|
|
case ACPI_HEST_NOTIFY_GPIO:
|
|
mutex_lock(&ghes_list_mutex);
|
|
list_del_rcu(&ghes->list);
|
|
if (list_empty(&ghes_hed))
|
|
unregister_acpi_hed_notifier(&ghes_notifier_hed);
|
|
mutex_unlock(&ghes_list_mutex);
|
|
synchronize_rcu();
|
|
break;
|
|
|
|
case ACPI_HEST_NOTIFY_SEA:
|
|
ghes_sea_remove(ghes);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_NMI:
|
|
ghes_nmi_remove(ghes);
|
|
break;
|
|
case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
|
|
rc = apei_sdei_unregister_ghes(ghes);
|
|
if (rc)
|
|
return rc;
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
ghes_fini(ghes);
|
|
|
|
ghes_edac_unregister(ghes);
|
|
|
|
kfree(ghes);
|
|
|
|
platform_set_drvdata(ghes_dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ghes_platform_driver = {
|
|
.driver = {
|
|
.name = "GHES",
|
|
},
|
|
.probe = ghes_probe,
|
|
.remove = ghes_remove,
|
|
};
|
|
|
|
static int __init ghes_init(void)
|
|
{
|
|
int rc;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
switch (hest_disable) {
|
|
case HEST_NOT_FOUND:
|
|
return -ENODEV;
|
|
case HEST_DISABLED:
|
|
pr_info(GHES_PFX "HEST is not enabled!\n");
|
|
return -EINVAL;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (ghes_disable) {
|
|
pr_info(GHES_PFX "GHES is not enabled!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ghes_nmi_init_cxt();
|
|
|
|
rc = platform_driver_register(&ghes_platform_driver);
|
|
if (rc)
|
|
goto err;
|
|
|
|
rc = apei_osc_setup();
|
|
if (rc == 0 && osc_sb_apei_support_acked)
|
|
pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n");
|
|
else if (rc == 0 && !osc_sb_apei_support_acked)
|
|
pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n");
|
|
else if (rc && osc_sb_apei_support_acked)
|
|
pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n");
|
|
else
|
|
pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
|
|
|
|
return 0;
|
|
err:
|
|
return rc;
|
|
}
|
|
device_initcall(ghes_init);
|