Merge "arm64: entry: add support for CONFIG_ARM64_REG_REBALANCE_ON_CTX_SW" (b07845a9) · Commits · e / devices / android_kernel_xiaomi_markw

arch/arm64/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -630,6 +630,13 @@ config PERF_EVENTS_RESET_PMU_DEBUGFS
		If you want to reset PMU and PMU related internal Perf variables
		via debugfs then say Y.

		config ARM64_REG_REBALANCE_ON_CTX_SW
		bool "Rebalance registers during context switches."
		def_bool ARCH_MSM8996
		help
		Forcefully re-balance register rename pools on context switches for
		improved performance on some devices.

		config SYS_SUPPORTS_HUGETLBFS
		def_bool y

+27 −0

Original line number	Diff line number	Diff line
		@@ -600,6 +600,33 @@ ENTRY(cpu_switch_to)
		ldp x27, x28, [x8], #16
		ldp x29, x9, [x8], #16
		ldr lr, [x8]
		#ifdef CONFIG_ARM64_REG_REBALANCE_ON_CTX_SW
		ORR x13, x13, x13
		ORR x14, x14, x14
		ORR x15, x15, x15
		ORR x16, x16, x16
		ORR x17, x17, x17
		ORR x18, x18, x18
		ORR x19, x19, x19
		ORR x20, x20, x20
		ORR x21, x21, x21
		MOV V0.16B, V0.16B
		MOV V1.16B, V1.16B
		MOV V2.16B, V2.16B
		MOV V3.16B, V3.16B
		MOV V4.16B, V4.16B
		MOV V5.16B, V5.16B
		MOV V6.16B, V6.16B
		MOV V7.16B, V7.16B
		MOV V8.16B, V8.16B
		MOV V9.16B, V9.16B
		MOV V10.16B, V10.16B
		MOV V11.16B, V11.16B
		MOV V12.16B, V12.16B
		MOV V13.16B, V13.16B
		MOV V14.16B, V14.16B
		MOV V15.16B, V15.16B
		#endif
		mov sp, x9
		ret
		ENDPROC(cpu_switch_to)