/* * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License (not later!) * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program; if not, see * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include #include "event-parse.h" static void write_state(struct trace_seq *s, int val) { const char states[] = "SDTtZXxW"; int found = 0; int i; for (i = 0; i < (sizeof(states) - 1); i++) { if (!(val & (1 << i))) continue; if (found) trace_seq_putc(s, '|'); found = 1; trace_seq_putc(s, states[i]); } if (!found) trace_seq_putc(s, 'R'); } static void write_and_save_comm(struct format_field *field, struct pevent_record *record, struct trace_seq *s, int pid) { const char *comm; int len; comm = (char *)(record->data + field->offset); len = s->len; trace_seq_printf(s, "%.*s", field->size, comm); /* make sure the comm has a \0 at the end. */ trace_seq_terminate(s); comm = &s->buffer[len]; /* Help out the comm to ids. This will handle dups */ pevent_register_comm(field->event->pevent, comm, pid); } static int sched_wakeup_handler(struct trace_seq *s, struct pevent_record *record, struct event_format *event, void *context) { struct format_field *field; unsigned long long val; if (pevent_get_field_val(s, event, "pid", record, &val, 1)) return trace_seq_putc(s, '!'); field = pevent_find_any_field(event, "comm"); if (field) { write_and_save_comm(field, record, s, val); trace_seq_putc(s, ':'); } trace_seq_printf(s, "%lld", val); if (pevent_get_field_val(s, event, "prio", record, &val, 0) == 0) trace_seq_printf(s, " [%lld]", val); if (pevent_get_field_val(s, event, "success", record, &val, 1) == 0) trace_seq_printf(s, " success=%lld", val); if (pevent_get_field_val(s, event, "target_cpu", record, &val, 0) == 0) trace_seq_printf(s, " CPU:%03llu", val); return 0; } static int sched_switch_handler(struct trace_seq *s, struct pevent_record *record, struct event_format *event, void *context) { struct format_field *field; unsigned long long val; if (pevent_get_field_val(s, event, "prev_pid", record, &val, 1)) return trace_seq_putc(s, '!'); field = pevent_find_any_field(event, "prev_comm"); if (field) { write_and_save_comm(field, record, s, val); trace_seq_putc(s, ':'); } trace_seq_printf(s, "%lld ", val); if (pevent_get_field_val(s, event, "prev_prio", record, &val, 0) == 0) trace_seq_printf(s, "[%d] ", (int) val); if (pevent_get_field_val(s, event, "prev_state", record, &val, 0) == 0) write_state(s, val); trace_seq_puts(s, " ==> "); if (pevent_get_field_val(s, event, "next_pid", record, &val, 1)) return trace_seq_putc(s, '!'); field = pevent_find_any_field(event, "next_comm"); if (field) { write_and_save_comm(field, record, s, val); trace_seq_putc(s, ':'); } trace_seq_printf(s, "%lld", val); if (pevent_get_field_val(s, event, "next_prio", record, &val, 0) == 0) trace_seq_printf(s, " [%d]", (int) val); return 0; } int PEVENT_PLUGIN_LOADER(struct pevent *pevent) { pevent_register_event_handler(pevent, -1, "sched", "sched_switch", sched_switch_handler, NULL); pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup", sched_wakeup_handler, NULL); pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup_new", sched_wakeup_handler, NULL); return 0; } void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent) { pevent_unregister_event_handler(pevent, -1, "sched", "sched_switch", sched_switch_handler, NULL); pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup", sched_wakeup_handler, NULL); pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup_new", sched_wakeup_handler, NULL); }
authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /sound/soc/jz4740/Kconfig
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/soc/jz4740/Kconfig')