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xen-mca.h
/* SPDX-License-Identifier: MIT */ /****************************************************************************** * 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_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); /* * Fields are zero when not available. Also, this struct is shared with * userspace mcelog and thus must keep existing fields at current offsets. * Only add new fields to the end of the structure */ struct xen_mce { __u64 status; __u64 misc; __u64 addr; __u64 mcgstatus; __u64 ip; __u64 tsc; /* cpu time stamp counter */ __u64 time; /* wall time_t when error was detected */ __u8 cpuvendor; /* cpu vendor as encoded in system.h */ __u8 inject_flags; /* software inject flags */ __u16 pad; __u32 cpuid; /* CPUID 1 EAX */ __u8 cs; /* code segment */ __u8 bank; /* machine check bank */ __u8 cpu; /* cpu number; obsolete; use extcpu now */ __u8 finished; /* entry is valid */ __u32 extcpu; /* linux cpu number that detected the error */ __u32 socketid; /* CPU socket ID */ __u32 apicid; /* CPU initial apic ID */ __u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */ __u64 synd; /* MCA_SYND MSR: only valid on SMCA systems */ __u64 ipid; /* MCA_IPID MSR: only valid on SMCA systems */ __u64 ppin; /* Protected Processor Inventory Number */ }; /* * This structure contains all data related to the MCE log. Also * carries a signature to make it easier to find from external * debugging tools. Each entry is only valid when its finished flag * is set. */ #define XEN_MCE_LOG_LEN 32 struct xen_mce_log { char signature[12]; /* "MACHINECHECK" */ unsigned len; /* = XEN_MCE_LOG_LEN */ unsigned next; unsigned flags; unsigned recordlen; /* length of struct xen_mce */ struct xen_mce entry[XEN_MCE_LOG_LEN]; }; #define XEN_MCE_OVERFLOW 0 /* bit 0 in flags means overflow */ #define XEN_MCE_LOG_SIGNATURE "MACHINECHECK" #define MCE_GET_RECORD_LEN _IOR('M', 1, int) #define MCE_GET_LOG_LEN _IOR('M', 2, int) #define MCE_GETCLEAR_FLAGS _IOR('M', 3, int) #endif /* __ASSEMBLY__ */ #endif /* __XEN_PUBLIC_ARCH_X86_MCA_H__ */
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