diff options
Diffstat (limited to 'sys/powerpc/powernv/opal_hmi.c')
| -rw-r--r-- | sys/powerpc/powernv/opal_hmi.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/sys/powerpc/powernv/opal_hmi.c b/sys/powerpc/powernv/opal_hmi.c new file mode 100644 index 000000000000..0dc179be3750 --- /dev/null +++ b/sys/powerpc/powernv/opal_hmi.c @@ -0,0 +1,143 @@ +/*- + * Copyright (c) 2019 Justin Hibbits + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/types.h> +#include <sys/eventhandler.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/endian.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/spr.h> +#include <machine/trap.h> +#include "opal.h" + +struct opal_hmi_event { + uint8_t version; + uint8_t severity; + uint8_t type; + uint8_t disposition; + uint8_t rsvd_1[4]; + uint64_t hmer; + uint64_t tfmr; + union { + struct { + uint8_t xstop_type; + uint8_t rsvd_2[3]; + uint32_t xstop_reason; + union { + uint32_t pir; + uint32_t chip_id; + }; + }; + }; +}; + +#define HMI_DISP_RECOVERED 0 +#define HMI_DISP_NOT_RECOVERED 1 + +static void +opal_hmi_event_handler(void *unused, struct opal_msg *msg) +{ + struct opal_hmi_event evt; + + memcpy(&evt, &msg->params, sizeof(evt)); + printf("Hypervisor Maintenance Event received" + "(Severity %d, type %d, HMER: %016lx).\n", + evt.severity, evt.type, evt.hmer); + + if (evt.disposition == HMI_DISP_NOT_RECOVERED) + panic("Unrecoverable hypervisor maintenance exception on CPU %d", + evt.pir); + + return; +} + +static int +opal_hmi_handler2(struct trapframe *frame) +{ + /* + * Use DMAP preallocated pcpu memory to handle + * the phys flags pointer. + */ + uint64_t *flags = PCPU_PTR(aim.opal_hmi_flags); + int err; + + *flags = 0; + err = opal_call(OPAL_HANDLE_HMI2, DMAP_TO_PHYS((vm_offset_t)flags)); + + if (be64toh(*flags) & OPAL_HMI_FLAGS_TOD_TB_FAIL) + panic("TOD/TB recovery failure"); + + if (err == OPAL_SUCCESS) + return (0); + + printf("HMI handler failed! OPAL error code: %d\n", err); + + return (-1); +} + +static int +opal_hmi_handler(struct trapframe *frame) +{ + int err; + + err = opal_call(OPAL_HANDLE_HMI); + + if (err == OPAL_SUCCESS) + return (0); + + printf("HMI handler failed! OPAL error code: %d\n", err); + + return (-1); +} + +static void +opal_setup_hmi(void *data) +{ + /* This only works for OPAL, so first make sure we have it. */ + if (opal_check() != 0) + return; + + if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI2) == OPAL_TOKEN_PRESENT) + hmi_handler = opal_hmi_handler2; + else if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT) + hmi_handler = opal_hmi_handler; + else { + printf("Warning: No OPAL HMI handler found.\n"); + return; + } + + EVENTHANDLER_REGISTER(OPAL_HMI_EVT, opal_hmi_event_handler, NULL, + EVENTHANDLER_PRI_ANY); + + if (bootverbose) + printf("Installed OPAL HMI handler.\n"); +} + +SYSINIT(opal_setup_hmi, SI_SUB_CPU, SI_ORDER_ANY, opal_setup_hmi, NULL); |