+++ /dev/null
-/******************************************************************************
- * mcelog.c
- * Driver for receiving and transferring machine check error infomation
- *
- * Copyright (c) 2012 Intel Corporation
- * Author: Liu, Jinsong <jinsong.liu@intel.com>
- * Author: Jiang, Yunhong <yunhong.jiang@intel.com>
- * Author: Ke, Liping <liping.ke@intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation; or, when distributed
- * separately from the Linux kernel or incorporated into other
- * software packages, subject to the following license:
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this source file (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy, modify,
- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <asm/mce.h>
-
-#include <xen/interface/xen.h>
-#include <xen/events.h>
-#include <xen/interface/vcpu.h>
-#include <xen/xen.h>
-#include <asm/xen/hypercall.h>
-#include <asm/xen/hypervisor.h>
-
-#define XEN_MCELOG "xen_mcelog: "
-
-static struct mc_info g_mi;
-static struct mcinfo_logical_cpu *g_physinfo;
-static uint32_t ncpus;
-
-static DEFINE_SPINLOCK(mcelog_lock);
-
-static int convert_log(struct mc_info *mi)
-{
- struct mcinfo_common *mic;
- struct mcinfo_global *mc_global;
- struct mcinfo_bank *mc_bank;
- struct mce m;
- uint32_t i;
-
- mic = NULL;
- x86_mcinfo_lookup(&mic, mi, MC_TYPE_GLOBAL);
- if (unlikely(!mic)) {
- pr_warning(XEN_MCELOG "Failed to find global error info\n");
- return -ENODEV;
- }
-
- mce_setup(&m);
- mc_global = (struct mcinfo_global *)mic;
- m.mcgstatus = mc_global->mc_gstatus;
- m.apicid = mc_global->mc_apicid;
-
- for (i = 0; i < ncpus; i++)
- if (g_physinfo[i].mc_apicid == m.apicid)
- break;
- if (unlikely(i == ncpus)) {
- pr_warning(XEN_MCELOG "Failed to match cpu with apicid %d\n",
- m.apicid);
- return -ENODEV;
- }
-
- m.socketid = g_physinfo[i].mc_chipid;
- m.cpu = m.extcpu = g_physinfo[i].mc_cpunr;
- m.cpuvendor = (__u8)g_physinfo[i].mc_vendor;
- m.mcgcap = g_physinfo[i].mc_msrvalues[__MC_MSR_MCGCAP].value;
-
- mic = NULL;
- x86_mcinfo_lookup(&mic, mi, MC_TYPE_BANK);
- if (unlikely(!mic)) {
- pr_warning(XEN_MCELOG "Fail to find bank error info\n");
- return -ENODEV;
- }
-
- do {
- if ((!mic) || (mic->size == 0) ||
- (mic->type != MC_TYPE_GLOBAL &&
- mic->type != MC_TYPE_BANK &&
- mic->type != MC_TYPE_EXTENDED &&
- mic->type != MC_TYPE_RECOVERY))
- break;
-
- if (mic->type == MC_TYPE_BANK) {
- mc_bank = (struct mcinfo_bank *)mic;
- m.misc = mc_bank->mc_misc;
- m.status = mc_bank->mc_status;
- m.addr = mc_bank->mc_addr;
- m.tsc = mc_bank->mc_tsc;
- m.bank = mc_bank->mc_bank;
- m.finished = 1;
- /*log this record*/
- mce_log(&m);
- }
- mic = x86_mcinfo_next(mic);
- } while (1);
-
- return 0;
-}
-
-static int mc_queue_handle(uint32_t flags)
-{
- struct xen_mc mc_op;
- int ret = 0;
- unsigned long tmp;
-
- spin_lock_irqsave(&mcelog_lock, tmp);
-
- mc_op.cmd = XEN_MC_fetch;
- mc_op.interface_version = XEN_MCA_INTERFACE_VERSION;
- set_xen_guest_handle(mc_op.u.mc_fetch.data, &g_mi);
- do {
- mc_op.u.mc_fetch.flags = flags;
- ret = HYPERVISOR_mca(&mc_op);
- if (ret) {
- pr_err(XEN_MCELOG "Failed to fetch %s error log\n",
- (flags == XEN_MC_URGENT) ?
- "urgnet" : "nonurgent");
- break;
- }
-
- if (mc_op.u.mc_fetch.flags & XEN_MC_NODATA ||
- mc_op.u.mc_fetch.flags & XEN_MC_FETCHFAILED)
- break;
- else {
- ret = convert_log(&g_mi);
- if (ret)
- pr_warning(XEN_MCELOG
- "Failed to convert this error log, "
- "continue acking it anyway\n");
-
- mc_op.u.mc_fetch.flags = flags | XEN_MC_ACK;
- ret = HYPERVISOR_mca(&mc_op);
- if (ret) {
- pr_err(XEN_MCELOG
- "Failed to ack previous error log\n");
- break;
- }
- }
- } while (1);
-
- spin_unlock_irqrestore(&mcelog_lock, tmp);
-
- return ret;
-}
-
-/* virq handler for machine check error info*/
-static irqreturn_t xen_mce_interrupt(int irq, void *dev_id)
-{
- int err;
-
- /* urgent mc_info */
- err = mc_queue_handle(XEN_MC_URGENT);
- if (err)
- pr_err(XEN_MCELOG
- "Failed to handle urgent mc_info queue, "
- "continue handling nonurgent mc_info queue anyway.\n");
-
- /* nonurgent mc_info */
- err = mc_queue_handle(XEN_MC_NONURGENT);
- if (err)
- pr_err(XEN_MCELOG
- "Failed to handle nonurgent mc_info queue.\n");
-
- return IRQ_HANDLED;
-}
-
-static int bind_virq_for_mce(void)
-{
- int ret;
- struct xen_mc mc_op;
-
- memset(&mc_op, 0, sizeof(struct xen_mc));
-
- /* Fetch physical CPU Numbers */
- mc_op.cmd = XEN_MC_physcpuinfo;
- mc_op.interface_version = XEN_MCA_INTERFACE_VERSION;
- set_xen_guest_handle(mc_op.u.mc_physcpuinfo.info, g_physinfo);
- ret = HYPERVISOR_mca(&mc_op);
- if (ret) {
- pr_err(XEN_MCELOG "Failed to get CPU numbers\n");
- return ret;
- }
-
- /* Fetch each CPU Physical Info for later reference*/
- ncpus = mc_op.u.mc_physcpuinfo.ncpus;
- g_physinfo = kcalloc(ncpus, sizeof(struct mcinfo_logical_cpu),
- GFP_KERNEL);
- if (!g_physinfo)
- return -ENOMEM;
- set_xen_guest_handle(mc_op.u.mc_physcpuinfo.info, g_physinfo);
- ret = HYPERVISOR_mca(&mc_op);
- if (ret) {
- pr_err(XEN_MCELOG "Failed to get CPU info\n");
- kfree(g_physinfo);
- return ret;
- }
-
- ret = bind_virq_to_irqhandler(VIRQ_MCA, 0,
- xen_mce_interrupt, 0, "mce", NULL);
- if (ret < 0) {
- pr_err(XEN_MCELOG "Failed to bind virq\n");
- kfree(g_physinfo);
- return ret;
- }
-
- return 0;
-}
-
-static int __init mcelog_init(void)
-{
- /* Only DOM0 is responsible for MCE logging */
- if (xen_initial_domain())
- return bind_virq_for_mce();
-
- return -ENODEV;
-}
-late_initcall(mcelog_init);
+++ /dev/null
-/******************************************************************************
- * arch-x86/mca.h
- * Guest OS machine check interface to x86 Xen.
- *
- * Contributed by Advanced Micro Devices, Inc.
- * Author: Christoph Egger <Christoph.Egger@amd.com>
- *
- * Updated by Intel Corporation
- * Author: Liu, Jinsong <jinsong.liu@intel.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#ifndef __XEN_PUBLIC_ARCH_X86_MCA_H__
-#define __XEN_PUBLIC_ARCH_X86_MCA_H__
-
-/* Hypercall */
-#define __HYPERVISOR_mca __HYPERVISOR_arch_0
-
-#define XEN_MCA_INTERFACE_VERSION 0x01ecc003
-
-/* IN: Dom0 calls hypercall to retrieve nonurgent error log entry */
-#define XEN_MC_NONURGENT 0x1
-/* IN: Dom0 calls hypercall to retrieve urgent error log entry */
-#define XEN_MC_URGENT 0x2
-/* IN: Dom0 acknowledges previosly-fetched error log entry */
-#define XEN_MC_ACK 0x4
-
-/* OUT: All is ok */
-#define XEN_MC_OK 0x0
-/* OUT: Domain could not fetch data. */
-#define XEN_MC_FETCHFAILED 0x1
-/* OUT: There was no machine check data to fetch. */
-#define XEN_MC_NODATA 0x2
-
-#ifndef __ASSEMBLY__
-/* vIRQ injected to Dom0 */
-#define VIRQ_MCA VIRQ_ARCH_0
-
-/*
- * mc_info entry types
- * mca machine check info are recorded in mc_info entries.
- * when fetch mca info, it can use MC_TYPE_... to distinguish
- * different mca info.
- */
-#define MC_TYPE_GLOBAL 0
-#define MC_TYPE_BANK 1
-#define MC_TYPE_EXTENDED 2
-#define MC_TYPE_RECOVERY 3
-
-struct mcinfo_common {
- uint16_t type; /* structure type */
- uint16_t size; /* size of this struct in bytes */
-};
-
-#define MC_FLAG_CORRECTABLE (1 << 0)
-#define MC_FLAG_UNCORRECTABLE (1 << 1)
-#define MC_FLAG_RECOVERABLE (1 << 2)
-#define MC_FLAG_POLLED (1 << 3)
-#define MC_FLAG_RESET (1 << 4)
-#define MC_FLAG_CMCI (1 << 5)
-#define MC_FLAG_MCE (1 << 6)
-
-/* contains x86 global mc information */
-struct mcinfo_global {
- struct mcinfo_common common;
-
- uint16_t mc_domid; /* running domain at the time in error */
- uint16_t mc_vcpuid; /* virtual cpu scheduled for mc_domid */
- uint32_t mc_socketid; /* physical socket of the physical core */
- uint16_t mc_coreid; /* physical impacted core */
- uint16_t mc_core_threadid; /* core thread of physical core */
- uint32_t mc_apicid;
- uint32_t mc_flags;
- uint64_t mc_gstatus; /* global status */
-};
-
-/* contains x86 bank mc information */
-struct mcinfo_bank {
- struct mcinfo_common common;
-
- uint16_t mc_bank; /* bank nr */
- uint16_t mc_domid; /* domain referenced by mc_addr if valid */
- uint64_t mc_status; /* bank status */
- uint64_t mc_addr; /* bank address */
- uint64_t mc_misc;
- uint64_t mc_ctrl2;
- uint64_t mc_tsc;
-};
-
-struct mcinfo_msr {
- uint64_t reg; /* MSR */
- uint64_t value; /* MSR value */
-};
-
-/* contains mc information from other or additional mc MSRs */
-struct mcinfo_extended {
- struct mcinfo_common common;
- uint32_t mc_msrs; /* Number of msr with valid values. */
- /*
- * Currently Intel extended MSR (32/64) include all gp registers
- * and E(R)FLAGS, E(R)IP, E(R)MISC, up to 11/19 of them might be
- * useful at present. So expand this array to 16/32 to leave room.
- */
- struct mcinfo_msr mc_msr[sizeof(void *) * 4];
-};
-
-/* Recovery Action flags. Giving recovery result information to DOM0 */
-
-/* Xen takes successful recovery action, the error is recovered */
-#define REC_ACTION_RECOVERED (0x1 << 0)
-/* No action is performed by XEN */
-#define REC_ACTION_NONE (0x1 << 1)
-/* It's possible DOM0 might take action ownership in some case */
-#define REC_ACTION_NEED_RESET (0x1 << 2)
-
-/*
- * Different Recovery Action types, if the action is performed successfully,
- * REC_ACTION_RECOVERED flag will be returned.
- */
-
-/* Page Offline Action */
-#define MC_ACTION_PAGE_OFFLINE (0x1 << 0)
-/* CPU offline Action */
-#define MC_ACTION_CPU_OFFLINE (0x1 << 1)
-/* L3 cache disable Action */
-#define MC_ACTION_CACHE_SHRINK (0x1 << 2)
-
-/*
- * Below interface used between XEN/DOM0 for passing XEN's recovery action
- * information to DOM0.
- */
-struct page_offline_action {
- /* Params for passing the offlined page number to DOM0 */
- uint64_t mfn;
- uint64_t status;
-};
-
-struct cpu_offline_action {
- /* Params for passing the identity of the offlined CPU to DOM0 */
- uint32_t mc_socketid;
- uint16_t mc_coreid;
- uint16_t mc_core_threadid;
-};
-
-#define MAX_UNION_SIZE 16
-struct mcinfo_recovery {
- struct mcinfo_common common;
- uint16_t mc_bank; /* bank nr */
- uint8_t action_flags;
- uint8_t action_types;
- union {
- struct page_offline_action page_retire;
- struct cpu_offline_action cpu_offline;
- uint8_t pad[MAX_UNION_SIZE];
- } action_info;
-};
-
-
-#define MCINFO_MAXSIZE 768
-struct mc_info {
- /* Number of mcinfo_* entries in mi_data */
- uint32_t mi_nentries;
- uint32_t flags;
- uint64_t mi_data[(MCINFO_MAXSIZE - 1) / 8];
-};
-DEFINE_GUEST_HANDLE_STRUCT(mc_info);
-
-#define __MC_MSR_ARRAYSIZE 8
-#define __MC_MSR_MCGCAP 0
-#define __MC_NMSRS 1
-#define MC_NCAPS 7
-struct mcinfo_logical_cpu {
- uint32_t mc_cpunr;
- uint32_t mc_chipid;
- uint16_t mc_coreid;
- uint16_t mc_threadid;
- uint32_t mc_apicid;
- uint32_t mc_clusterid;
- uint32_t mc_ncores;
- uint32_t mc_ncores_active;
- uint32_t mc_nthreads;
- uint32_t mc_cpuid_level;
- uint32_t mc_family;
- uint32_t mc_vendor;
- uint32_t mc_model;
- uint32_t mc_step;
- char mc_vendorid[16];
- char mc_brandid[64];
- uint32_t mc_cpu_caps[MC_NCAPS];
- uint32_t mc_cache_size;
- uint32_t mc_cache_alignment;
- uint32_t mc_nmsrvals;
- struct mcinfo_msr mc_msrvalues[__MC_MSR_ARRAYSIZE];
-};
-DEFINE_GUEST_HANDLE_STRUCT(mcinfo_logical_cpu);
-
-/*
- * Prototype:
- * uint32_t x86_mcinfo_nentries(struct mc_info *mi);
- */
-#define x86_mcinfo_nentries(_mi) \
- ((_mi)->mi_nentries)
-/*
- * Prototype:
- * struct mcinfo_common *x86_mcinfo_first(struct mc_info *mi);
- */
-#define x86_mcinfo_first(_mi) \
- ((struct mcinfo_common *)(_mi)->mi_data)
-/*
- * Prototype:
- * struct mcinfo_common *x86_mcinfo_next(struct mcinfo_common *mic);
- */
-#define x86_mcinfo_next(_mic) \
- ((struct mcinfo_common *)((uint8_t *)(_mic) + (_mic)->size))
-
-/*
- * Prototype:
- * void x86_mcinfo_lookup(void *ret, struct mc_info *mi, uint16_t type);
- */
-static inline void x86_mcinfo_lookup(struct mcinfo_common **ret,
- struct mc_info *mi, uint16_t type)
-{
- uint32_t i;
- struct mcinfo_common *mic;
- bool found = 0;
-
- if (!ret || !mi)
- return;
-
- mic = x86_mcinfo_first(mi);
- for (i = 0; i < x86_mcinfo_nentries(mi); i++) {
- if (mic->type == type) {
- found = 1;
- break;
- }
- mic = x86_mcinfo_next(mic);
- }
-
- *ret = found ? mic : NULL;
-}
-
-/*
- * Fetch machine check data from hypervisor.
- */
-#define XEN_MC_fetch 1
-struct xen_mc_fetch {
- /*
- * IN: XEN_MC_NONURGENT, XEN_MC_URGENT,
- * XEN_MC_ACK if ack'king an earlier fetch
- * OUT: XEN_MC_OK, XEN_MC_FETCHAILED, XEN_MC_NODATA
- */
- uint32_t flags;
- uint32_t _pad0;
- /* OUT: id for ack, IN: id we are ack'ing */
- uint64_t fetch_id;
-
- /* OUT variables. */
- GUEST_HANDLE(mc_info) data;
-};
-DEFINE_GUEST_HANDLE_STRUCT(xen_mc_fetch);
-
-
-/*
- * This tells the hypervisor to notify a DomU about the machine check error
- */
-#define XEN_MC_notifydomain 2
-struct xen_mc_notifydomain {
- /* IN variables */
- uint16_t mc_domid; /* The unprivileged domain to notify */
- uint16_t mc_vcpuid; /* The vcpu in mc_domid to notify */
-
- /* IN/OUT variables */
- uint32_t flags;
-};
-DEFINE_GUEST_HANDLE_STRUCT(xen_mc_notifydomain);
-
-#define XEN_MC_physcpuinfo 3
-struct xen_mc_physcpuinfo {
- /* IN/OUT */
- uint32_t ncpus;
- uint32_t _pad0;
- /* OUT */
- GUEST_HANDLE(mcinfo_logical_cpu) info;
-};
-
-#define XEN_MC_msrinject 4
-#define MC_MSRINJ_MAXMSRS 8
-struct xen_mc_msrinject {
- /* IN */
- uint32_t mcinj_cpunr; /* target processor id */
- uint32_t mcinj_flags; /* see MC_MSRINJ_F_* below */
- uint32_t mcinj_count; /* 0 .. count-1 in array are valid */
- uint32_t _pad0;
- struct mcinfo_msr mcinj_msr[MC_MSRINJ_MAXMSRS];
-};
-
-/* Flags for mcinj_flags above; bits 16-31 are reserved */
-#define MC_MSRINJ_F_INTERPOSE 0x1
-
-#define XEN_MC_mceinject 5
-struct xen_mc_mceinject {
- unsigned int mceinj_cpunr; /* target processor id */
-};
-
-struct xen_mc {
- uint32_t cmd;
- uint32_t interface_version; /* XEN_MCA_INTERFACE_VERSION */
- union {
- struct xen_mc_fetch mc_fetch;
- struct xen_mc_notifydomain mc_notifydomain;
- struct xen_mc_physcpuinfo mc_physcpuinfo;
- struct xen_mc_msrinject mc_msrinject;
- struct xen_mc_mceinject mc_mceinject;
- } u;
-};
-DEFINE_GUEST_HANDLE_STRUCT(xen_mc);
-
-#endif /* __ASSEMBLY__ */
-#endif /* __XEN_PUBLIC_ARCH_X86_MCA_H__ */
projects / users / jedix / linux-maple.git / commitdiff