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Commit fbf8e13d authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: [kbuild] Allow platforms to disable LLSC for !SMP as well 



Currently ARC_HAS_LLSC can be influenced by platform for SMP only using
ARC_HAS_COH_LLSC. For !SMP it defaults to "y".

It turns out that some customers can't support it all, even in UP.
So we change the semantics, and use a negative dependency ARC_CANT_LLSC.
Any platform (independent of SMP or !SMP) can select it to disable LLSC.

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 30ecee8c

arch/arc/Kconfig

+4 −6
Original line number Diff line number Diff line
@@ -134,9 +134,6 @@ if SMP 
config ARC_HAS_COH_CACHES

	def_bool n



config ARC_HAS_COH_LLSC

	def_bool n



config ARC_HAS_COH_RTSC

	def_bool n
@@ -304,6 +301,9 @@ config ARC_FPU_SAVE_RESTORE 
	  based on actual usage of FPU by a task. Thus our implemn does

	  this for all tasks in system.



config ARC_CANT_LLSC

	def_bool n



menuconfig ARC_CPU_REL_4_10

	bool "Enable support for Rel 4.10 features"

	default n
@@ -314,9 +314,7 @@ menuconfig ARC_CPU_REL_4_10 
config ARC_HAS_LLSC

	bool "Insn: LLOCK/SCOND (efficient atomic ops)"

	default y

	depends on ARC_CPU_770

	# if SMP, enable LLSC ONLY if ARC implementation has coherent atomics

	depends on !SMP || ARC_HAS_COH_LLSC

	depends on ARC_CPU_770 && !ARC_CANT_LLSC



config ARC_HAS_SWAPE

	bool "Insn: SWAPE (endian-swap)"