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f39650de68
kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out panic and oops helpers. There are several purposes of doing this: - dropping dependency in bug.h - dropping a loop by moving out panic_notifier.h - unload kernel.h from something which has its own domain At the same time convert users tree-wide to use new headers, although for the time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [akpm@linux-foundation.org: thread_info.h needs limits.h] [andriy.shevchenko@linux.intel.com: ia64 fix] Link: https://lkml.kernel.org/r/20210520130557.55277-1-andriy.shevchenko@linux.intel.com Link: https://lkml.kernel.org/r/20210511074137.33666-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Co-developed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Corey Minyard <cminyard@mvista.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Wei Liu <wei.liu@kernel.org> Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Sebastian Reichel <sre@kernel.org> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* sstate.c: System soft state support.
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*
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* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/panic_notifier.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <asm/hypervisor.h>
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#include <asm/spitfire.h>
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#include <asm/oplib.h>
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#include <asm/head.h>
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#include <asm/io.h>
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#include "kernel.h"
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static int hv_supports_soft_state;
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static void do_set_sstate(unsigned long state, const char *msg)
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{
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unsigned long err;
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if (!hv_supports_soft_state)
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return;
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err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
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if (err) {
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printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
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"state[%lx] msg[%s], err=%lu\n",
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state, msg, err);
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}
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}
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static const char booting_msg[32] __attribute__((aligned(32))) =
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"Linux booting";
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static const char running_msg[32] __attribute__((aligned(32))) =
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"Linux running";
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static const char halting_msg[32] __attribute__((aligned(32))) =
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"Linux halting";
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static const char poweroff_msg[32] __attribute__((aligned(32))) =
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"Linux powering off";
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static const char rebooting_msg[32] __attribute__((aligned(32))) =
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"Linux rebooting";
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static const char panicking_msg[32] __attribute__((aligned(32))) =
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"Linux panicking";
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static int sstate_reboot_call(struct notifier_block *np, unsigned long type, void *_unused)
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{
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const char *msg;
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switch (type) {
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case SYS_DOWN:
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default:
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msg = rebooting_msg;
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break;
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case SYS_HALT:
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msg = halting_msg;
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break;
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case SYS_POWER_OFF:
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msg = poweroff_msg;
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break;
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}
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do_set_sstate(HV_SOFT_STATE_TRANSITION, msg);
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return NOTIFY_OK;
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}
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static struct notifier_block sstate_reboot_notifier = {
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.notifier_call = sstate_reboot_call,
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};
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static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
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{
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do_set_sstate(HV_SOFT_STATE_TRANSITION, panicking_msg);
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return NOTIFY_DONE;
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}
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static struct notifier_block sstate_panic_block = {
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.notifier_call = sstate_panic_event,
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.priority = INT_MAX,
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};
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static int __init sstate_init(void)
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{
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unsigned long major, minor;
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if (tlb_type != hypervisor)
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return 0;
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major = 1;
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minor = 0;
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if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
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return 0;
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hv_supports_soft_state = 1;
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prom_sun4v_guest_soft_state();
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do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
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atomic_notifier_chain_register(&panic_notifier_list,
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&sstate_panic_block);
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register_reboot_notifier(&sstate_reboot_notifier);
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return 0;
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}
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core_initcall(sstate_init);
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static int __init sstate_running(void)
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{
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do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
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return 0;
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}
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late_initcall(sstate_running);
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