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kernel_optimize_test/arch/arm64
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Marc Zyngier b138d65cce arm64: Add missing ISB after invalidating TLB in __primary_switch 
[ Upstream commit 9d41053e8dc115c92b8002c3db5f545d7602498b ]

Although there has been a bit of back and forth on the subject, it
appears that invalidating TLBs requires an ISB instruction when FEAT_ETS
is not implemented by the CPU.

From the bible:

  | In an implementation that does not implement FEAT_ETS, a TLB
  | maintenance instruction executed by a PE, PEx, can complete at any
  | time after it is issued, but is only guaranteed to be finished for a
  | PE, PEx, after the execution of DSB by the PEx followed by a Context
  | synchronization event

Add the missing ISB in __primary_switch, just in case.

Fixes: 3c5e9f238b ("arm64: head.S: move KASLR processing out of __enable_mmu()")
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20210224093738.3629662-3-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:20 +01:00
..
boot arm64: dts: qcom: qrb5165-rb5: fix pm8009 regulators 2021-03-04 11:37:53 +01:00
configs arm64: defconfig: Build in CONFIG_GPIO_MXC by default 2020-10-26 15:48:58 +08:00
crypto crypto: arm64/aes-ce - really hide slower algos when faster ones are enabled 2021-03-04 11:37:37 +01:00
include arm64: Do not pass tagged addresses to __is_lm_address() 2021-02-07 15:37:13 +01:00
kernel arm64: Add missing ISB after invalidating TLB in __primary_switch 2021-03-04 11:38:20 +01:00
kvm KVM: arm64: Filter out v8.1+ events on v8.0 HW 2021-02-03 23:28:41 +01:00
lib arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S 2020-10-30 08:32:31 +00:00
mm arm64: Do not pass tagged addresses to __is_lm_address() 2021-02-07 15:37:13 +01:00
net
xen
Kbuild
Kconfig kbuild: Hoist '--orphan-handling' into Kconfig 2020-12-01 22:45:36 +09:00
Kconfig.debug
Kconfig.platforms arm64: berlin: Select DW_APB_TIMER_OF 2020-10-26 10:45:03 +01:00
Makefile arm64: link with -z norelro for LLD or aarch64-elf 2021-01-12 20:18:24 +01:00