fdb916d53e
When an HMI occurs a message event also gets created with the details of the exception. Hook into the messaging framework to retrieve the HMI message. Nothing is done with it yet, except to panic on unhandled exception.
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*-
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* Copyright (c) 2019 Justin Hibbits
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/eventhandler.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/endian.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/spr.h>
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#include <machine/trap.h>
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#include "opal.h"
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struct opal_hmi_event {
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uint8_t version;
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uint8_t severity;
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uint8_t type;
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uint8_t disposition;
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uint8_t rsvd_1[4];
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uint64_t hmer;
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uint64_t tfmr;
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union {
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struct {
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uint8_t xstop_type;
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uint8_t rsvd_2[3];
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uint32_t xstop_reason;
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union {
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uint32_t pir;
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uint32_t chip_id;
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};
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};
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};
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};
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#define HMI_DISP_RECOVERED 0
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#define HMI_DISP_NOT_RECOVERED 1
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static void
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opal_hmi_event_handler(void *unused, struct opal_msg *msg)
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{
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struct opal_hmi_event evt;
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memcpy(&evt, &msg->params, sizeof(evt));
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printf("Hypervisor Maintenance Event received"
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"(Severity %d, type %d, HMER: %016lx).\n",
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evt.severity, evt.type, evt.hmer);
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if (evt.disposition == HMI_DISP_NOT_RECOVERED)
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panic("Unrecoverable hypervisor maintenance exception on CPU %d",
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evt.pir);
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return;
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}
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static int
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opal_hmi_handler(struct trapframe *frame)
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{
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int err;
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err = opal_call(OPAL_HANDLE_HMI);
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if (err == OPAL_SUCCESS) {
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mtspr(SPR_HMER, 0);
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return (0);
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}
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printf("HMI handler failed! OPAL error code: %d\n", err);
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return (-1);
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}
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static void
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opal_setup_hmi(void *data)
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{
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/* This only works for OPAL, so first make sure we have it. */
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if (opal_check() != 0)
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return;
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if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT)
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hmi_handler = opal_hmi_handler;
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else {
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printf("Warning: No OPAL HMI handler found.\n");
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return;
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}
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EVENTHANDLER_REGISTER(OPAL_HMI_EVT, opal_hmi_event_handler, NULL,
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EVENTHANDLER_PRI_ANY);
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if (bootverbose)
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printf("Installed OPAL HMI handler.\n");
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}
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SYSINIT(opal_setup_hmi, SI_SUB_CPU, SI_ORDER_ANY, opal_setup_hmi, NULL);
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