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

Pull ARM updates from Russell King:

 - amba bus irq rework

 - add kfence support

 - support for Cortex M33 and M55 CPUs

 - kbuild updates for decompressor

 - let core code manage thread_info::cpu

 - avoid unpredictable NOP encoding in decompressor

 - reduce information printed in calltraces

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: reduce the information printed in call traces
  ARM: 9168/1: Add support for Cortex-M55 processor
  ARM: 9167/1: Add support for Cortex-M33 processor
  ARM: 9166/1: Support KFENCE for ARM
  ARM: 9165/1: mm: Provide is_write_fault()
  ARM: 9164/1: mm: Provide set_memory_valid()
  ARM: 9163/1: amba: Move of_amba_device_decode_irq() into amba_probe()
  ARM: 9162/1: amba: Kill sysfs attribute file of irq
  ARM: 9161/1: mm: mark private VM_FAULT_X defines as vm_fault_t
  ARM: 9159/1: decompressor: Avoid UNPREDICTABLE NOP encoding
  ARM: 9158/1: leave it to core code to manage thread_info::cpu
  ARM: 9154/1: decompressor: do not copy source files while building

9 files changed, 32 insertions, 44 deletions

diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index 60606b0f378d..d32f41778437 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -1,9 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
-ashldi3.S
-bswapsdi2.S
-font.c
-lib1funcs.S
-hyp-stub.S
 piggy_data
 vmlinux
 vmlinux.lds
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 91265e7ff672..74d2f1401acb 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -13,7 +13,6 @@ ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
 OBJS	+= debug.o
 AFLAGS_head.o += -DDEBUG
 endif
-FONTC	= $(srctree)/lib/fonts/font_acorn_8x8.c
 
 # string library code (-Os is enforced to keep it much smaller)
 OBJS		+= string.o
@@ -99,11 +98,8 @@ $(foreach o, $(libfdt_objs) atags_to_fdt.o fdt_check_mem_start.o, \
 	$(eval CFLAGS_$(o) := -I $(srctree)/scripts/dtc/libfdt -fno-stack-protector))
 
 targets       := vmlinux vmlinux.lds piggy_data piggy.o \
-		 lib1funcs.o ashldi3.o bswapsdi2.o \
 		 head.o $(OBJS)
 
-clean-files += lib1funcs.S ashldi3.S bswapsdi2.S hyp-stub.S
-
 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 
 ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \
@@ -134,23 +130,7 @@ endif
 # Next argument is a linker script
 LDFLAGS_vmlinux += -T
 
-# For __aeabi_uidivmod
-lib1funcs = $(obj)/lib1funcs.o
-
-$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
-	$(call cmd,shipped)
-
-# For __aeabi_llsl
-ashldi3 = $(obj)/ashldi3.o
-
-$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
-	$(call cmd,shipped)
-
-# For __bswapsi2, __bswapdi2
-bswapsdi2 = $(obj)/bswapsdi2.o
-
-$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
-	$(call cmd,shipped)
+OBJS	+= lib1funcs.o ashldi3.o bswapsdi2.o
 
 # We need to prevent any GOTOFF relocs being used with references
 # to symbols in the .bss section since we cannot relocate them
@@ -175,8 +155,8 @@ fi
 efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a
 
 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
-		$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \
-		$(bswapsdi2) $(efi-obj-y) FORCE
+		$(addprefix $(obj)/, $(OBJS)) \
+		$(efi-obj-y) FORCE
 	@$(check_for_multiple_zreladdr)
 	$(call if_changed,ld)
 	@$(check_for_bad_syms)
@@ -187,11 +167,4 @@ $(obj)/piggy_data: $(obj)/../Image FORCE
 $(obj)/piggy.o: $(obj)/piggy_data
 
 CFLAGS_font.o := -Dstatic=
-
-$(obj)/font.c: $(FONTC)
-	$(call cmd,shipped)
-
 AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
-
-$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
-	$(call cmd,shipped)
diff --git a/arch/arm/boot/compressed/ashldi3.S b/arch/arm/boot/compressed/ashldi3.S
new file mode 100644
index 000000000000..216f82eda609
--- /dev/null
+++ b/arch/arm/boot/compressed/ashldi3.S
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* For __aeabi_llsl */
+#include "../../lib/ashldi3.S"
diff --git a/arch/arm/boot/compressed/bswapsdi2.S b/arch/arm/boot/compressed/bswapsdi2.S
new file mode 100644
index 000000000000..b2156b378c7b
--- /dev/null
+++ b/arch/arm/boot/compressed/bswapsdi2.S
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* For __bswapsi2, __bswapdi2 */
+#include "../../lib/bswapsdi2.S"
diff --git a/arch/arm/boot/compressed/efi-header.S b/arch/arm/boot/compressed/efi-header.S
index c0e7a745103e..230030c13085 100644
--- a/arch/arm/boot/compressed/efi-header.S
+++ b/arch/arm/boot/compressed/efi-header.S
@@ -9,16 +9,22 @@
 #include <linux/sizes.h>
 
 		.macro	__nop
-#ifdef CONFIG_EFI_STUB
-		@ This is almost but not quite a NOP, since it does clobber the
-		@ condition flags. But it is the best we can do for EFI, since
-		@ PE/COFF expects the magic string "MZ" at offset 0, while the
-		@ ARM/Linux boot protocol expects an executable instruction
-		@ there.
-		.inst	MZ_MAGIC | (0x1310 << 16)	@ tstne r0, #0x4d000
-#else
  AR_CLASS(	mov	r0, r0		)
   M_CLASS(	nop.w			)
+		.endm
+
+		.macro __initial_nops
+#ifdef CONFIG_EFI_STUB
+		@ This is a two-instruction NOP, which happens to bear the
+		@ PE/COFF signature "MZ" in the first two bytes, so the kernel
+		@ is accepted as an EFI binary. Booting via the UEFI stub
+		@ will not execute those instructions, but the ARM/Linux
+		@ boot protocol does, so we need some NOPs here.
+		.inst	MZ_MAGIC | (0xe225 << 16)	@ eor r5, r5, 0x4d000
+		eor	r5, r5, 0x4d000			@ undo previous insn
+#else
+		__nop
+		__nop
 #endif
 		.endm
 
diff --git a/arch/arm/boot/compressed/font.c b/arch/arm/boot/compressed/font.c
new file mode 100644
index 000000000000..46a677649db4
--- /dev/null
+++ b/arch/arm/boot/compressed/font.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include "../../../../lib/fonts/font_acorn_8x8.c"
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index b1cb1972361b..bf79f2f78d23 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -203,7 +203,8 @@ start:
 		 * were patching the initial instructions of the kernel, i.e
 		 * had started to exploit this "patch area".
 		 */
-		.rept	7
+		__initial_nops
+		.rept	5
 		__nop
 		.endr
 #ifndef CONFIG_THUMB2_KERNEL
diff --git a/arch/arm/boot/compressed/hyp-stub.S b/arch/arm/boot/compressed/hyp-stub.S
new file mode 100644
index 000000000000..a703eaa86f10
--- /dev/null
+++ b/arch/arm/boot/compressed/hyp-stub.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../kernel/hyp-stub.S"
diff --git a/arch/arm/boot/compressed/lib1funcs.S b/arch/arm/boot/compressed/lib1funcs.S
new file mode 100644
index 000000000000..815dec73ba4d
--- /dev/null
+++ b/arch/arm/boot/compressed/lib1funcs.S
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* For __aeabi_uidivmod */
+#include "../../lib/lib1funcs.S"