^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* sstate.c: System soft state support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/hypervisor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/spitfire.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int hv_supports_soft_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static void do_set_sstate(unsigned long state, const char *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned long err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (!hv_supports_soft_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) "state[%lx] msg[%s], err=%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) state, msg, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static const char booting_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) "Linux booting";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static const char running_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) "Linux running";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static const char halting_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) "Linux halting";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static const char poweroff_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) "Linux powering off";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static const char rebooting_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) "Linux rebooting";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static const char panicking_msg[32] __attribute__((aligned(32))) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) "Linux panicking";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int sstate_reboot_call(struct notifier_block *np, unsigned long type, void *_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) const char *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case SYS_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) msg = rebooting_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) case SYS_HALT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) msg = halting_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) case SYS_POWER_OFF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) msg = poweroff_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) do_set_sstate(HV_SOFT_STATE_TRANSITION, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct notifier_block sstate_reboot_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .notifier_call = sstate_reboot_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) do_set_sstate(HV_SOFT_STATE_TRANSITION, panicking_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static struct notifier_block sstate_panic_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .notifier_call = sstate_panic_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .priority = INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static int __init sstate_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned long major, minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (tlb_type != hypervisor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) major = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) minor = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) hv_supports_soft_state = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) prom_sun4v_guest_soft_state();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) atomic_notifier_chain_register(&panic_notifier_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) &sstate_panic_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) register_reboot_notifier(&sstate_reboot_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) core_initcall(sstate_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int __init sstate_running(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) late_initcall(sstate_running);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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