1 /*- 2 * Copyright (c) 2019 Justin Hibbits 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/param.h> 27 #include <sys/types.h> 28 #include <sys/eventhandler.h> 29 #include <sys/kernel.h> 30 #include <sys/systm.h> 31 #include <sys/endian.h> 32 33 #include <vm/vm.h> 34 #include <vm/pmap.h> 35 36 #include <machine/spr.h> 37 #include <machine/trap.h> 38 #include "opal.h" 39 40 struct opal_hmi_event { 41 uint8_t version; 42 uint8_t severity; 43 uint8_t type; 44 uint8_t disposition; 45 uint8_t rsvd_1[4]; 46 uint64_t hmer; 47 uint64_t tfmr; 48 union { 49 struct { 50 uint8_t xstop_type; 51 uint8_t rsvd_2[3]; 52 uint32_t xstop_reason; 53 union { 54 uint32_t pir; 55 uint32_t chip_id; 56 }; 57 }; 58 }; 59 }; 60 61 #define HMI_DISP_RECOVERED 0 62 #define HMI_DISP_NOT_RECOVERED 1 63 64 static void 65 opal_hmi_event_handler(void *unused, struct opal_msg *msg) 66 { 67 struct opal_hmi_event evt; 68 69 memcpy(&evt, &msg->params, sizeof(evt)); 70 printf("Hypervisor Maintenance Event received" 71 "(Severity %d, type %d, HMER: %016lx).\n", 72 evt.severity, evt.type, evt.hmer); 73 74 if (evt.disposition == HMI_DISP_NOT_RECOVERED) 75 panic("Unrecoverable hypervisor maintenance exception on CPU %d", 76 evt.pir); 77 78 return; 79 } 80 81 static int 82 opal_hmi_handler2(struct trapframe *frame) 83 { 84 /* 85 * Use DMAP preallocated pcpu memory to handle 86 * the phys flags pointer. 87 */ 88 uint64_t *flags = PCPU_PTR(aim.opal_hmi_flags); 89 int err; 90 91 *flags = 0; 92 err = opal_call(OPAL_HANDLE_HMI2, DMAP_TO_PHYS((vm_offset_t)flags)); 93 94 if (be64toh(*flags) & OPAL_HMI_FLAGS_TOD_TB_FAIL) 95 panic("TOD/TB recovery failure"); 96 97 if (err == OPAL_SUCCESS) 98 return (0); 99 100 printf("HMI handler failed! OPAL error code: %d\n", err); 101 102 return (-1); 103 } 104 105 static int 106 opal_hmi_handler(struct trapframe *frame) 107 { 108 int err; 109 110 err = opal_call(OPAL_HANDLE_HMI); 111 112 if (err == OPAL_SUCCESS) 113 return (0); 114 115 printf("HMI handler failed! OPAL error code: %d\n", err); 116 117 return (-1); 118 } 119 120 static void 121 opal_setup_hmi(void *data) 122 { 123 /* This only works for OPAL, so first make sure we have it. */ 124 if (opal_check() != 0) 125 return; 126 127 if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI2) == OPAL_TOKEN_PRESENT) 128 hmi_handler = opal_hmi_handler2; 129 else if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT) 130 hmi_handler = opal_hmi_handler; 131 else { 132 printf("Warning: No OPAL HMI handler found.\n"); 133 return; 134 } 135 136 EVENTHANDLER_REGISTER(OPAL_HMI_EVT, opal_hmi_event_handler, NULL, 137 EVENTHANDLER_PRI_ANY); 138 139 if (bootverbose) 140 printf("Installed OPAL HMI handler.\n"); 141 } 142 143 SYSINIT(opal_setup_hmi, SI_SUB_CPU, SI_ORDER_ANY, opal_setup_hmi, NULL); 144