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/cdefs.h> 27 #include <sys/param.h> 28 #include <sys/types.h> 29 #include <sys/eventhandler.h> 30 #include <sys/kernel.h> 31 #include <sys/systm.h> 32 #include <sys/endian.h> 33 34 #include <vm/vm.h> 35 #include <vm/pmap.h> 36 37 #include <machine/spr.h> 38 #include <machine/trap.h> 39 #include "opal.h" 40 41 struct opal_hmi_event { 42 uint8_t version; 43 uint8_t severity; 44 uint8_t type; 45 uint8_t disposition; 46 uint8_t rsvd_1[4]; 47 uint64_t hmer; 48 uint64_t tfmr; 49 union { 50 struct { 51 uint8_t xstop_type; 52 uint8_t rsvd_2[3]; 53 uint32_t xstop_reason; 54 union { 55 uint32_t pir; 56 uint32_t chip_id; 57 }; 58 }; 59 }; 60 }; 61 62 #define HMI_DISP_RECOVERED 0 63 #define HMI_DISP_NOT_RECOVERED 1 64 65 static void 66 opal_hmi_event_handler(void *unused, struct opal_msg *msg) 67 { 68 struct opal_hmi_event evt; 69 70 memcpy(&evt, &msg->params, sizeof(evt)); 71 printf("Hypervisor Maintenance Event received" 72 "(Severity %d, type %d, HMER: %016lx).\n", 73 evt.severity, evt.type, evt.hmer); 74 75 if (evt.disposition == HMI_DISP_NOT_RECOVERED) 76 panic("Unrecoverable hypervisor maintenance exception on CPU %d", 77 evt.pir); 78 79 return; 80 } 81 82 static int 83 opal_hmi_handler2(struct trapframe *frame) 84 { 85 /* 86 * Use DMAP preallocated pcpu memory to handle 87 * the phys flags pointer. 88 */ 89 uint64_t *flags = PCPU_PTR(aim.opal_hmi_flags); 90 int err; 91 92 *flags = 0; 93 err = opal_call(OPAL_HANDLE_HMI2, DMAP_TO_PHYS((vm_offset_t)flags)); 94 95 if (be64toh(*flags) & OPAL_HMI_FLAGS_TOD_TB_FAIL) 96 panic("TOD/TB recovery failure"); 97 98 if (err == OPAL_SUCCESS) 99 return (0); 100 101 printf("HMI handler failed! OPAL error code: %d\n", err); 102 103 return (-1); 104 } 105 106 static int 107 opal_hmi_handler(struct trapframe *frame) 108 { 109 int err; 110 111 err = opal_call(OPAL_HANDLE_HMI); 112 113 if (err == OPAL_SUCCESS) 114 return (0); 115 116 printf("HMI handler failed! OPAL error code: %d\n", err); 117 118 return (-1); 119 } 120 121 static void 122 opal_setup_hmi(void *data) 123 { 124 /* This only works for OPAL, so first make sure we have it. */ 125 if (opal_check() != 0) 126 return; 127 128 if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI2) == OPAL_TOKEN_PRESENT) 129 hmi_handler = opal_hmi_handler2; 130 else if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT) 131 hmi_handler = opal_hmi_handler; 132 else { 133 printf("Warning: No OPAL HMI handler found.\n"); 134 return; 135 } 136 137 EVENTHANDLER_REGISTER(OPAL_HMI_EVT, opal_hmi_event_handler, NULL, 138 EVENTHANDLER_PRI_ANY); 139 140 if (bootverbose) 141 printf("Installed OPAL HMI handler.\n"); 142 } 143 144 SYSINIT(opal_setup_hmi, SI_SUB_CPU, SI_ORDER_ANY, opal_setup_hmi, NULL); 145