TARGETS = bpf TARGETS += breakpoints TARGETS += capabilities TARGETS += cpu-hotplug TARGETS += efivarfs TARGETS += exec TARGETS += firmware TARGETS += ftrace TARGETS += futex TARGETS += gpio TARGETS += ipc TARGETS += kcmp TARGETS += lib TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug TARGETS += mount TARGETS += mqueue TARGETS += net TARGETS += nsfs TARGETS += powerpc TARGETS += pstore TARGETS += ptrace TARGETS += seccomp TARGETS += sigaltstack TARGETS += size TARGETS += static_keys TARGETS += sync TARGETS += sysctl ifneq (1, $(quicktest)) TARGETS += timers endif TARGETS += user TARGETS += vm TARGETS += x86 TARGETS += zram #Please keep the TARGETS list alphabetically sorted # Run "make quicktest=1 run_tests" or # "make quicktest=1 kselftest from top level Makefile TARGETS_HOTPLUG = cpu-hotplug TARGETS_HOTPLUG += memory-hotplug # Clear LDFLAGS and MAKEFLAGS if called from main # Makefile to avoid test build failures when test # Makefile doesn't have explicit build rules. ifeq (1,$(MAKELEVEL)) override LDFLAGS = override MAKEFLAGS = endif all: for TARGET in $(TARGETS); do \ make -C $$TARGET; \ done; run_tests: all for TARGET in $(TARGETS); do \ make -C $$TARGET run_tests; \ done; hotplug: for TARGET in $(TARGETS_HOTPLUG); do \ make -C $$TARGET; \ done; run_hotplug: hotplug for TARGET in $(TARGETS_HOTPLUG); do \ make -C $$TARGET run_full_test; \ done; clean_hotplug: for TARGET in $(TARGETS_HOTPLUG); do \ make -C $$TARGET clean; \ done; run_pstore_crash: make -C pstore run_crash INSTALL_PATH ?= install INSTALL_PATH := $(abspath $(INSTALL_PATH)) ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh install: ifdef INSTALL_PATH @# Ask all targets to install their files mkdir -p $(INSTALL_PATH) for TARGET in $(TARGETS); do \ make -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \ done; @# Ask all targets to emit their test scripts echo "#!/bin/sh" > $(ALL_SCRIPT) echo "cd \$$(dirname \$$0)" >> $(ALL_SCRIPT) echo "ROOT=\$$PWD" >> $(ALL_SCRIPT) for TARGET in $(TARGETS); do \ echo "echo ; echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \ echo "echo ========================================" >> $(ALL_SCRIPT); \ echo "cd $$TARGET" >> $(ALL_SCRIPT); \ make -s --no-print-directory -C $$TARGET emit_tests >> $(ALL_SCRIPT); \ echo "cd \$$ROOT" >> $(ALL_SCRIPT); \ done; chmod u+x $(ALL_SCRIPT) else $(error Error: set INSTALL_PATH to use install) endif clean: for TARGET in $(TARGETS); do \ make -C $$TARGET clean; \ done; .PHONY: install type='hidden' name='id' value='bf29bddf0417a4783da3b24e8c9e017ac649326f'/>
path: root/kernel/trace/trace_functions.c
diff options
context:
space:
mode:
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 /kernel/trace/trace_functions.c
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 'kernel/trace/trace_functions.c')