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    SubjectRe: [Xen-devel] [PATCH 1/3] Add mcelog support for xen platform
    On Thu, Apr 19, 2012 at 01:29:06PM +0000, Liu, Jinsong wrote:
    > >From af4467b6cf0104ce98cc160438d865256c7d5561 Mon Sep 17 00:00:00 2001
    > From: Liu, Jinsong <jinsong.liu@intel.com>
    > Date: Fri, 20 Apr 2012 05:08:38 +0800
    > Subject: [PATCH 1/3] Add mcelog support for xen platform

    Tony and Borislav,

    Should this driver reside in arch/x86/kernel/cpu/mcheck?
    I can keep it in drivers/xen, but I realized that perhaps it
    should be in a different location?
    >
    > When MCA error occurs, it would be handled by xen hypervisor first,
    > and then the error information would be sent to dom0 for logging.
    >
    > This patch gets error information from xen hypervisor and convert
    > xen format error into linux format mcelog. This logic is basically
    > self-contained, not much touching other kernel components.
    >
    > So under xen platform when MCA error occurs, the error information
    > would be sent to dom0 and converted into native linux mcelog format.
    > By using tools like mcelog tool users could read specific error information,
    > like what they did under native linux.
    >
    > Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
    > Signed-off-by: Ke, Liping <liping.ke@intel.com>
    > Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
    > Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    > ---
    > arch/x86/include/asm/xen/hypercall.h | 8 +
    > arch/x86/xen/enlighten.c | 4 +-
    > drivers/xen/Kconfig | 8 +
    > drivers/xen/Makefile | 1 +
    > drivers/xen/mcelog.c | 240 ++++++++++++++++++++++++
    > include/xen/interface/xen-mca.h | 336 ++++++++++++++++++++++++++++++++++
    > 6 files changed, 594 insertions(+), 3 deletions(-)
    > create mode 100644 drivers/xen/mcelog.c
    > create mode 100644 include/xen/interface/xen-mca.h
    >
    > diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
    > index 5728852..59c226d 100644
    > --- a/arch/x86/include/asm/xen/hypercall.h
    > +++ b/arch/x86/include/asm/xen/hypercall.h
    > @@ -48,6 +48,7 @@
    > #include <xen/interface/sched.h>
    > #include <xen/interface/physdev.h>
    > #include <xen/interface/platform.h>
    > +#include <xen/interface/xen-mca.h>
    >
    > /*
    > * The hypercall asms have to meet several constraints:
    > @@ -302,6 +303,13 @@ HYPERVISOR_set_timer_op(u64 timeout)
    > }
    >
    > static inline int
    > +HYPERVISOR_mca(struct xen_mc *mc_op)
    > +{
    > + mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
    > + return _hypercall1(int, mca, mc_op);
    > +}
    > +
    > +static inline int
    > HYPERVISOR_dom0_op(struct xen_platform_op *platform_op)
    > {
    > platform_op->interface_version = XENPF_INTERFACE_VERSION;
    > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
    > index 4f51beb..15628d4 100644
    > --- a/arch/x86/xen/enlighten.c
    > +++ b/arch/x86/xen/enlighten.c
    > @@ -329,9 +329,7 @@ static void __init xen_init_cpuid_mask(void)
    > unsigned int xsave_mask;
    >
    > cpuid_leaf1_edx_mask =
    > - ~((1 << X86_FEATURE_MCE) | /* disable MCE */
    > - (1 << X86_FEATURE_MCA) | /* disable MCA */
    > - (1 << X86_FEATURE_MTRR) | /* disable MTRR */
    > + ~((1 << X86_FEATURE_MTRR) | /* disable MTRR */
    > (1 << X86_FEATURE_ACC)); /* thermal monitoring */
    >
    > if (!xen_initial_domain())
    > diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
    > index 9424313..0f54241 100644
    > --- a/drivers/xen/Kconfig
    > +++ b/drivers/xen/Kconfig
    > @@ -194,4 +194,12 @@ config XEN_ACPI_PROCESSOR
    > module will be called xen_acpi_processor If you do not know what to choose,
    > select M here. If the CPUFREQ drivers are built in, select Y here.
    >
    > +config XEN_MCE_LOG
    > + bool "Xen platform mcelog"
    > + depends on XEN_DOM0 && X86_64 && X86_MCE
    > + default n
    > + help
    > + Allow kernel fetching MCE error from Xen platform and
    > + converting it into Linux mcelog format for mcelog tools
    > +
    > endmenu
    > diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
    > index 9adc5be..1d3e763 100644
    > --- a/drivers/xen/Makefile
    > +++ b/drivers/xen/Makefile
    > @@ -14,6 +14,7 @@ obj-$(CONFIG_XEN_GNTDEV) += xen-gntdev.o
    > obj-$(CONFIG_XEN_GRANT_DEV_ALLOC) += xen-gntalloc.o
    > obj-$(CONFIG_XENFS) += xenfs/
    > obj-$(CONFIG_XEN_SYS_HYPERVISOR) += sys-hypervisor.o
    > +obj-$(CONFIG_XEN_MCE_LOG) += mcelog.o
    > obj-$(CONFIG_XEN_PVHVM) += platform-pci.o
    > obj-$(CONFIG_XEN_TMEM) += tmem.o
    > obj-$(CONFIG_SWIOTLB_XEN) += swiotlb-xen.o
    > diff --git a/drivers/xen/mcelog.c b/drivers/xen/mcelog.c
    > new file mode 100644
    > index 0000000..95ceb5e
    > --- /dev/null
    > +++ b/drivers/xen/mcelog.c
    > @@ -0,0 +1,240 @@
    > +/******************************************************************************
    > + * 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);
    > diff --git a/include/xen/interface/xen-mca.h b/include/xen/interface/xen-mca.h
    > new file mode 100644
    > index 0000000..f2561db
    > --- /dev/null
    > +++ b/include/xen/interface/xen-mca.h
    > @@ -0,0 +1,336 @@
    > +/******************************************************************************
    > + * 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__ */
    > --
    > 1.7.1

    > _______________________________________________
    > Xen-devel mailing list
    > Xen-devel@lists.xen.org
    > http://lists.xen.org/xen-devel



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