1 /******************************************************************************
3 * Guest OS machine check interface to x86 Xen.
5 * Contributed by Advanced Micro Devices, Inc.
6 * Author: Christoph Egger <Christoph.Egger@amd.com>
8 * Updated by Intel Corporation
9 * Author: Liu, Jinsong <jinsong.liu@intel.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to
13 * deal in the Software without restriction, including without limitation the
14 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
15 * sell copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 * DEALINGS IN THE SOFTWARE.
30 #ifndef __XEN_PUBLIC_ARCH_X86_MCA_H__
31 #define __XEN_PUBLIC_ARCH_X86_MCA_H__
34 #define __HYPERVISOR_mca __HYPERVISOR_arch_0
36 #define XEN_MCA_INTERFACE_VERSION 0x01ecc003
38 /* IN: Dom0 calls hypercall to retrieve nonurgent error log entry */
39 #define XEN_MC_NONURGENT 0x1
40 /* IN: Dom0 calls hypercall to retrieve urgent error log entry */
41 #define XEN_MC_URGENT 0x2
42 /* IN: Dom0 acknowledges previosly-fetched error log entry */
43 #define XEN_MC_ACK 0x4
47 /* OUT: Domain could not fetch data. */
48 #define XEN_MC_FETCHFAILED 0x1
49 /* OUT: There was no machine check data to fetch. */
50 #define XEN_MC_NODATA 0x2
53 /* vIRQ injected to Dom0 */
54 #define VIRQ_MCA VIRQ_ARCH_0
58 * mca machine check info are recorded in mc_info entries.
59 * when fetch mca info, it can use MC_TYPE_... to distinguish
62 #define MC_TYPE_GLOBAL 0
63 #define MC_TYPE_BANK 1
64 #define MC_TYPE_EXTENDED 2
65 #define MC_TYPE_RECOVERY 3
67 struct mcinfo_common {
68 uint16_t type; /* structure type */
69 uint16_t size; /* size of this struct in bytes */
72 #define MC_FLAG_CORRECTABLE (1 << 0)
73 #define MC_FLAG_UNCORRECTABLE (1 << 1)
74 #define MC_FLAG_RECOVERABLE (1 << 2)
75 #define MC_FLAG_POLLED (1 << 3)
76 #define MC_FLAG_RESET (1 << 4)
77 #define MC_FLAG_CMCI (1 << 5)
78 #define MC_FLAG_MCE (1 << 6)
80 /* contains x86 global mc information */
81 struct mcinfo_global {
82 struct mcinfo_common common;
84 uint16_t mc_domid; /* running domain at the time in error */
85 uint16_t mc_vcpuid; /* virtual cpu scheduled for mc_domid */
86 uint32_t mc_socketid; /* physical socket of the physical core */
87 uint16_t mc_coreid; /* physical impacted core */
88 uint16_t mc_core_threadid; /* core thread of physical core */
91 uint64_t mc_gstatus; /* global status */
94 /* contains x86 bank mc information */
96 struct mcinfo_common common;
98 uint16_t mc_bank; /* bank nr */
99 uint16_t mc_domid; /* domain referenced by mc_addr if valid */
100 uint64_t mc_status; /* bank status */
101 uint64_t mc_addr; /* bank address */
108 uint64_t reg; /* MSR */
109 uint64_t value; /* MSR value */
112 /* contains mc information from other or additional mc MSRs */
113 struct mcinfo_extended {
114 struct mcinfo_common common;
115 uint32_t mc_msrs; /* Number of msr with valid values. */
117 * Currently Intel extended MSR (32/64) include all gp registers
118 * and E(R)FLAGS, E(R)IP, E(R)MISC, up to 11/19 of them might be
119 * useful at present. So expand this array to 16/32 to leave room.
121 struct mcinfo_msr mc_msr[sizeof(void *) * 4];
124 /* Recovery Action flags. Giving recovery result information to DOM0 */
126 /* Xen takes successful recovery action, the error is recovered */
127 #define REC_ACTION_RECOVERED (0x1 << 0)
128 /* No action is performed by XEN */
129 #define REC_ACTION_NONE (0x1 << 1)
130 /* It's possible DOM0 might take action ownership in some case */
131 #define REC_ACTION_NEED_RESET (0x1 << 2)
134 * Different Recovery Action types, if the action is performed successfully,
135 * REC_ACTION_RECOVERED flag will be returned.
138 /* Page Offline Action */
139 #define MC_ACTION_PAGE_OFFLINE (0x1 << 0)
140 /* CPU offline Action */
141 #define MC_ACTION_CPU_OFFLINE (0x1 << 1)
142 /* L3 cache disable Action */
143 #define MC_ACTION_CACHE_SHRINK (0x1 << 2)
146 * Below interface used between XEN/DOM0 for passing XEN's recovery action
147 * information to DOM0.
149 struct page_offline_action {
150 /* Params for passing the offlined page number to DOM0 */
155 struct cpu_offline_action {
156 /* Params for passing the identity of the offlined CPU to DOM0 */
157 uint32_t mc_socketid;
159 uint16_t mc_core_threadid;
162 #define MAX_UNION_SIZE 16
163 struct mcinfo_recovery {
164 struct mcinfo_common common;
165 uint16_t mc_bank; /* bank nr */
166 uint8_t action_flags;
167 uint8_t action_types;
169 struct page_offline_action page_retire;
170 struct cpu_offline_action cpu_offline;
171 uint8_t pad[MAX_UNION_SIZE];
176 #define MCINFO_MAXSIZE 768
178 /* Number of mcinfo_* entries in mi_data */
179 uint32_t mi_nentries;
181 uint64_t mi_data[(MCINFO_MAXSIZE - 1) / 8];
183 DEFINE_GUEST_HANDLE_STRUCT(mc_info);
185 #define __MC_MSR_ARRAYSIZE 8
186 #define __MC_MSR_MCGCAP 0
189 struct mcinfo_logical_cpu {
193 uint16_t mc_threadid;
195 uint32_t mc_clusterid;
197 uint32_t mc_ncores_active;
198 uint32_t mc_nthreads;
199 uint32_t mc_cpuid_level;
204 char mc_vendorid[16];
206 uint32_t mc_cpu_caps[MC_NCAPS];
207 uint32_t mc_cache_size;
208 uint32_t mc_cache_alignment;
209 uint32_t mc_nmsrvals;
210 struct mcinfo_msr mc_msrvalues[__MC_MSR_ARRAYSIZE];
212 DEFINE_GUEST_HANDLE_STRUCT(mcinfo_logical_cpu);
216 * uint32_t x86_mcinfo_nentries(struct mc_info *mi);
218 #define x86_mcinfo_nentries(_mi) \
222 * struct mcinfo_common *x86_mcinfo_first(struct mc_info *mi);
224 #define x86_mcinfo_first(_mi) \
225 ((struct mcinfo_common *)(_mi)->mi_data)
228 * struct mcinfo_common *x86_mcinfo_next(struct mcinfo_common *mic);
230 #define x86_mcinfo_next(_mic) \
231 ((struct mcinfo_common *)((uint8_t *)(_mic) + (_mic)->size))
235 * void x86_mcinfo_lookup(void *ret, struct mc_info *mi, uint16_t type);
237 static inline void x86_mcinfo_lookup(struct mcinfo_common **ret,
238 struct mc_info *mi, uint16_t type)
241 struct mcinfo_common *mic;
247 mic = x86_mcinfo_first(mi);
248 for (i = 0; i < x86_mcinfo_nentries(mi); i++) {
249 if (mic->type == type) {
253 mic = x86_mcinfo_next(mic);
256 *ret = found ? mic : NULL;
260 * Fetch machine check data from hypervisor.
262 #define XEN_MC_fetch 1
263 struct xen_mc_fetch {
265 * IN: XEN_MC_NONURGENT, XEN_MC_URGENT,
266 * XEN_MC_ACK if ack'king an earlier fetch
267 * OUT: XEN_MC_OK, XEN_MC_FETCHAILED, XEN_MC_NODATA
271 /* OUT: id for ack, IN: id we are ack'ing */
275 GUEST_HANDLE(mc_info) data;
277 DEFINE_GUEST_HANDLE_STRUCT(xen_mc_fetch);
281 * This tells the hypervisor to notify a DomU about the machine check error
283 #define XEN_MC_notifydomain 2
284 struct xen_mc_notifydomain {
286 uint16_t mc_domid; /* The unprivileged domain to notify */
287 uint16_t mc_vcpuid; /* The vcpu in mc_domid to notify */
289 /* IN/OUT variables */
292 DEFINE_GUEST_HANDLE_STRUCT(xen_mc_notifydomain);
294 #define XEN_MC_physcpuinfo 3
295 struct xen_mc_physcpuinfo {
300 GUEST_HANDLE(mcinfo_logical_cpu) info;
303 #define XEN_MC_msrinject 4
304 #define MC_MSRINJ_MAXMSRS 8
305 struct xen_mc_msrinject {
307 uint32_t mcinj_cpunr; /* target processor id */
308 uint32_t mcinj_flags; /* see MC_MSRINJ_F_* below */
309 uint32_t mcinj_count; /* 0 .. count-1 in array are valid */
311 struct mcinfo_msr mcinj_msr[MC_MSRINJ_MAXMSRS];
314 /* Flags for mcinj_flags above; bits 16-31 are reserved */
315 #define MC_MSRINJ_F_INTERPOSE 0x1
317 #define XEN_MC_mceinject 5
318 struct xen_mc_mceinject {
319 unsigned int mceinj_cpunr; /* target processor id */
324 uint32_t interface_version; /* XEN_MCA_INTERFACE_VERSION */
326 struct xen_mc_fetch mc_fetch;
327 struct xen_mc_notifydomain mc_notifydomain;
328 struct xen_mc_physcpuinfo mc_physcpuinfo;
329 struct xen_mc_msrinject mc_msrinject;
330 struct xen_mc_mceinject mc_mceinject;
333 DEFINE_GUEST_HANDLE_STRUCT(xen_mc);
335 /* Fields are zero when not available */
342 __u64 tsc; /* cpu time stamp counter */
343 __u64 time; /* wall time_t when error was detected */
344 __u8 cpuvendor; /* cpu vendor as encoded in system.h */
345 __u8 inject_flags; /* software inject flags */
347 __u32 cpuid; /* CPUID 1 EAX */
348 __u8 cs; /* code segment */
349 __u8 bank; /* machine check bank */
350 __u8 cpu; /* cpu number; obsolete; use extcpu now */
351 __u8 finished; /* entry is valid */
352 __u32 extcpu; /* linux cpu number that detected the error */
353 __u32 socketid; /* CPU socket ID */
354 __u32 apicid; /* CPU initial apic ID */
355 __u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */
359 * This structure contains all data related to the MCE log. Also
360 * carries a signature to make it easier to find from external
361 * debugging tools. Each entry is only valid when its finished flag
365 #define XEN_MCE_LOG_LEN 32
368 char signature[12]; /* "MACHINECHECK" */
369 unsigned len; /* = XEN_MCE_LOG_LEN */
372 unsigned recordlen; /* length of struct xen_mce */
373 struct xen_mce entry[XEN_MCE_LOG_LEN];
376 #define XEN_MCE_OVERFLOW 0 /* bit 0 in flags means overflow */
378 #define XEN_MCE_LOG_SIGNATURE "MACHINECHECK"
380 #define MCE_GET_RECORD_LEN _IOR('M', 1, int)
381 #define MCE_GET_LOG_LEN _IOR('M', 2, int)
382 #define MCE_GETCLEAR_FLAGS _IOR('M', 3, int)
384 #endif /* __ASSEMBLY__ */
385 #endif /* __XEN_PUBLIC_ARCH_X86_MCA_H__ */