mirror of
https://github.com/hardkernel/linux.git
synced 2026-04-01 18:53:02 +09:00
fc4206adb0
commit 95c5824f75 upstream.
Add a kernel cmdline parameter "tsx" to control the Transactional
Synchronization Extensions (TSX) feature. On CPUs that support TSX
control, use "tsx=on|off" to enable or disable TSX. Not specifying this
option is equivalent to "tsx=off". This is because on certain processors
TSX may be used as a part of a speculative side channel attack.
Carve out the TSX controlling functionality into a separate compilation
unit because TSX is a CPU feature while the TSX async abort control
machinery will go to cpu/bugs.c.
[ bp: - Massage, shorten and clear the arg buffer.
- Clarifications of the tsx= possible options - Josh.
- Expand on TSX_CTRL availability - Pawan. ]
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
[bwh: Backported to 4.9: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
54 lines
1.5 KiB
Makefile
54 lines
1.5 KiB
Makefile
#
|
|
# Makefile for x86-compatible CPU details, features and quirks
|
|
#
|
|
|
|
# Don't trace early stages of a secondary CPU boot
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
CFLAGS_REMOVE_common.o = -pg
|
|
CFLAGS_REMOVE_perf_event.o = -pg
|
|
endif
|
|
|
|
# If these files are instrumented, boot hangs during the first second.
|
|
KCOV_INSTRUMENT_common.o := n
|
|
KCOV_INSTRUMENT_perf_event.o := n
|
|
|
|
# Make sure load_percpu_segment has no stackprotector
|
|
nostackp := $(call cc-option, -fno-stack-protector)
|
|
CFLAGS_common.o := $(nostackp)
|
|
|
|
obj-y := intel_cacheinfo.o scattered.o topology.o
|
|
obj-y += common.o
|
|
obj-y += rdrand.o
|
|
obj-y += match.o
|
|
obj-y += bugs.o
|
|
|
|
obj-$(CONFIG_PROC_FS) += proc.o
|
|
obj-$(CONFIG_X86_FEATURE_NAMES) += capflags.o powerflags.o
|
|
|
|
obj-$(CONFIG_CPU_SUP_INTEL) += intel.o tsx.o
|
|
obj-$(CONFIG_CPU_SUP_AMD) += amd.o
|
|
obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o
|
|
obj-$(CONFIG_CPU_SUP_CENTAUR) += centaur.o
|
|
obj-$(CONFIG_CPU_SUP_TRANSMETA_32) += transmeta.o
|
|
obj-$(CONFIG_CPU_SUP_UMC_32) += umc.o
|
|
|
|
obj-$(CONFIG_X86_MCE) += mcheck/
|
|
obj-$(CONFIG_MTRR) += mtrr/
|
|
obj-$(CONFIG_MICROCODE) += microcode/
|
|
|
|
obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o
|
|
|
|
obj-$(CONFIG_HYPERVISOR_GUEST) += vmware.o hypervisor.o mshyperv.o
|
|
|
|
ifdef CONFIG_X86_FEATURE_NAMES
|
|
quiet_cmd_mkcapflags = MKCAP $@
|
|
cmd_mkcapflags = $(CONFIG_SHELL) $(srctree)/$(src)/mkcapflags.sh $< $@
|
|
|
|
cpufeature = $(src)/../../include/asm/cpufeatures.h
|
|
|
|
targets += capflags.c
|
|
$(obj)/capflags.c: $(cpufeature) $(src)/mkcapflags.sh FORCE
|
|
$(call if_changed,mkcapflags)
|
|
endif
|
|
clean-files += capflags.c
|