Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM udpates from Russell King:

 - Improve Kconfig help text for Cortex A8 and Cortex A9 errata

 - Kconfig spelling and grammar fixes

 - Allow kernel-mode VFP/Neon in softirq context

 - Use Neon in softirq context

 - Implement AES-CTR/GHASH version of GCM

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9289/1: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer
  ARM: 9288/1: Kconfigs: fix spelling & grammar
  ARM: 9286/1: crypto: Implement fused AES-CTR/GHASH version of GCM
  ARM: 9285/1: remove meaningless arch/arm/mach-rda/Makefile
  ARM: 9283/1: permit non-nested kernel mode NEON in softirq context
  ARM: 9282/1: vfp: Manipulate task VFP state with softirqs disabled
  ARM: 9281/1: improve Cortex A8/A9 errata help text

Author: torvalds

arch/arm/Kconfig

@@ -344,14 +344,16 @@ comment "CPU Core family selection"
 config ARCH_MULTI_V4
 	bool "ARMv4 based platforms (FA526, StrongARM)"
 	depends on !ARCH_MULTI_V6_V7
-	depends on !LD_IS_LLD
+	# https://github.com/llvm/llvm-project/issues/50764
+	depends on !LD_IS_LLD || LLD_VERSION >= 160000
 	select ARCH_MULTI_V4_V5
 	select CPU_FA526 if !(CPU_SA110 || CPU_SA1100)
 
 config ARCH_MULTI_V4T
 	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
 	depends on !ARCH_MULTI_V6_V7
-	depends on !LD_IS_LLD
+	# https://github.com/llvm/llvm-project/issues/50764
+	depends on !LD_IS_LLD || LLD_VERSION >= 160000
 	select ARCH_MULTI_V4_V5
 	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
 		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
@@ -656,7 +658,9 @@ config ARM_ERRATA_458693
 	  hazard might then cause a processor deadlock. The workaround enables
 	  the L1 caching of the NEON accesses and disables the PLD instruction
 	  in the ACTLR register. Note that setting specific bits in the ACTLR
-	  register may not be available in non-secure mode.
+	  register may not be available in non-secure mode and thus is not
+	  available on a multiplatform kernel. This should be applied by the
+	  bootloader instead.
 
 config ARM_ERRATA_460075
 	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
@@ -669,7 +673,9 @@ config ARM_ERRATA_460075
 	  and overwritten with stale memory contents from external memory. The
 	  workaround disables the write-allocate mode for the L2 cache via the
 	  ACTLR register. Note that setting specific bits in the ACTLR register
-	  may not be available in non-secure mode.
+	  may not be available in non-secure mode and thus is not available on
+	  a multiplatform kernel. This should be applied by the bootloader
+	  instead.
 
 config ARM_ERRATA_742230
 	bool "ARM errata: DMB operation may be faulty"
@@ -682,7 +688,10 @@ config ARM_ERRATA_742230
 	  ordering of the two writes. This workaround sets a specific bit in
 	  the diagnostic register of the Cortex-A9 which causes the DMB
 	  instruction to behave as a DSB, ensuring the correct behaviour of
-	  the two writes.
+	  the two writes. Note that setting specific bits in the diagnostics
+	  register may not be available in non-secure mode and thus is not
+	  available on a multiplatform kernel. This should be applied by the
+	  bootloader instead.
 
 config ARM_ERRATA_742231
 	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
@@ -697,7 +706,10 @@ config ARM_ERRATA_742231
 	  replaced from one of the CPUs at the same time as another CPU is
 	  accessing it. This workaround sets specific bits in the diagnostic
 	  register of the Cortex-A9 which reduces the linefill issuing
-	  capabilities of the processor.
+	  capabilities of the processor. Note that setting specific bits in the
+	  diagnostics register may not be available in non-secure mode and thus
+	  is not available on a multiplatform kernel. This should be applied by
+	  the bootloader instead.
 
 config ARM_ERRATA_643719
 	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
@@ -734,7 +746,9 @@ config ARM_ERRATA_743622
 	  register of the Cortex-A9 which disables the Store Buffer
 	  optimisation, preventing the defect from occurring. This has no
 	  visible impact on the overall performance or power consumption of the
-	  processor.
+	  processor. Note that setting specific bits in the diagnostics register
+	  may not be available in non-secure mode and thus is not available on a
+	  multiplatform kernel. This should be applied by the bootloader instead.
 
 config ARM_ERRATA_751472
 	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
@@ -746,6 +760,10 @@ config ARM_ERRATA_751472
 	  completion of a following broadcasted operation if the second
 	  operation is received by a CPU before the ICIALLUIS has completed,
 	  potentially leading to corrupted entries in the cache or TLB.
+	  Note that setting specific bits in the diagnostics register may
+	  not be available in non-secure mode and thus is not available on
+	  a multiplatform kernel. This should be applied by the bootloader
+	  instead.
 
 config ARM_ERRATA_754322
 	bool "ARM errata: possible faulty MMU translations following an ASID switch"

arch/arm/Kconfig.debug

@@ -1206,8 +1206,8 @@ choice
 		depends on MACH_STM32MP157
 		select DEBUG_STM32_UART
 		help
-		  Say Y here if you want kernel low-level debugging support
-		  on STM32MP1 based platforms, wich default UART is wired on
+		  Say Y here if you want kernel low-level debugging support on
+		  STM32MP1-based platforms, where the default UART is wired to
 		  UART4, but another UART instance can be selected by modifying
 		  CONFIG_DEBUG_UART_PHYS and CONFIG_DEBUG_UART_VIRT.
 

arch/arm/Makefile

@@ -209,7 +209,6 @@ machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
 machine-$(CONFIG_ARCH_ORION5X)		+= orion5x
 machine-$(CONFIG_ARCH_PXA)		+= pxa
 machine-$(CONFIG_ARCH_QCOM)		+= qcom
-machine-$(CONFIG_ARCH_RDA)		+= rda
 machine-$(CONFIG_ARCH_REALTEK)		+= realtek
 machine-$(CONFIG_ARCH_ROCKCHIP)		+= rockchip
 machine-$(CONFIG_ARCH_RPC)		+= rpc

arch/arm/crypto/Kconfig

@@ -16,8 +16,10 @@ config CRYPTO_CURVE25519_NEON
 config CRYPTO_GHASH_ARM_CE
 	tristate "Hash functions: GHASH (PMULL/NEON/ARMv8 Crypto Extensions)"
 	depends on KERNEL_MODE_NEON
+	select CRYPTO_AEAD
 	select CRYPTO_HASH
 	select CRYPTO_CRYPTD
+	select CRYPTO_LIB_AES
 	select CRYPTO_LIB_GF128MUL
 	help
 	  GCM GHASH function (NIST SP800-38D)