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

4cb1fc6f · Linus Torvalds <[email protected]> · 2022-12-13 15:22:14 -08:00

Pull ARM updates from Russell King:

 - update unwinder to cope with module PLTs

 - enable UBSAN on ARM

 - improve kernel fault message

 - update UEFI runtime page tables dump

 - avoid clang's __aeabi_uldivmod generated in NWFPE code

 - disable FIQs on CPU shutdown paths

 - update XOR register usage

 - a number of build updates (using .arch, thread pointer, removal of
   lazy evaluation in Makefile)

 - conversion of stacktrace code to stackwalk

 - findbit assembly updates

 - hwcap feature updates for ARMv8 CPUs

 - instruction dump updates for big-endian platforms

 - support for function error injection

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits)
  ARM: 9279/1: support function error injection
  ARM: 9277/1: Make the dumped instructions are consistent with the disassembled ones
  ARM: 9276/1: Refactor dump_instr()
  ARM: 9275/1: Drop '-mthumb' from AFLAGS_ISA
  ARM: 9274/1: Add hwcap for Speculative Store Bypassing Safe
  ARM: 9273/1: Add hwcap for Speculation Barrier(SB)
  ARM: 9272/1: vfp: Add hwcap for FEAT_AA32I8MM
  ARM: 9271/1: vfp: Add hwcap for FEAT_AA32BF16
  ARM: 9270/1: vfp: Add hwcap for FEAT_FHM
  ARM: 9269/1: vfp: Add hwcap for FEAT_DotProd
  ARM: 9268/1: vfp: Add hwcap FPHP and ASIMDHP for FEAT_FP16
  ARM: 9267/1: Define Armv8 registers in AArch32 state
  ARM: findbit: add unwinder information
  ARM: findbit: operate by words
  ARM: findbit: convert to macros
  ARM: findbit: provide more efficient ARMv7 implementation
  ARM: findbit: document ARMv5 bit offset calculation
  ARM: 9259/1: stacktrace: Convert stacktrace to generic ARCH_STACKWALK
  ARM: 9258/1: stacktrace: Make stack walk callback consistent with generic code
  ARM: 9265/1: pass -march= only to compiler
  ...

Commit: 4cb1fc6fffe4910845e183d1a2dfe9509ba1062c
Parents: 740afa4d · aaa4dd1b

Merge commit. Changes below are compared with the first parent: 740afa4d.

Changes

70 files changed · +393 −340

File	Status	Add	Del	Content
arch/arm/Kconfig	modified	+3	−0	View file
arch/arm/Makefile	modified	+45	−36	View file
arch/arm/boot/compressed/Makefile	modified	+1	−1	View file
arch/arm/common/Makefile	modified	+0	−2	View file
arch/arm/common/mcpm_head.S	modified	+2	−0	View file
arch/arm/common/vlock.S	modified	+2	−0	View file
arch/arm/include/asm/assembler.h	modified	+6	−0	View file
arch/arm/include/asm/cputype.h	modified	+4	−0	View file
arch/arm/include/asm/module.h	modified	+5	−0	View file
arch/arm/include/asm/ptdump.h	modified	+1	−0	View file
arch/arm/include/asm/ptrace.h	modified	+4	−0	View file
arch/arm/include/asm/stacktrace.h	modified	+1	−1	View file
arch/arm/include/asm/vfp.h	modified	+6	−0	View file
arch/arm/include/asm/xor.h	modified	+2	−2	View file
arch/arm/include/uapi/asm/hwcap.h	modified	+8	−0	View file
arch/arm/kernel/Makefile	modified	+0	−2	View file
arch/arm/kernel/hyp-stub.S	modified	+2	−0	View file
arch/arm/kernel/machine_kexec.c	modified	+2	−0	View file
arch/arm/kernel/module-plts.c	modified	+14	−0	View file
arch/arm/kernel/perf_callchain.c	modified	+4	−5	View file
arch/arm/kernel/return_address.c	modified	+4	−4	View file
arch/arm/kernel/setup.c	modified	+22	−0	View file
arch/arm/kernel/smp.c	modified	+2	−3	View file
arch/arm/kernel/stacktrace.c	modified	+34	−85	View file
arch/arm/kernel/swp_emulate.c	modified	+1	−0	View file
arch/arm/kernel/traps.c	modified	+14	−11	View file
arch/arm/kernel/unwind.c	modified	+12	−1	View file
arch/arm/lib/Makefile	modified	+2	−4	View file
arch/arm/lib/delay-loop.S	modified	+4	−0	View file
arch/arm/lib/error-inject.c	added	+10	−0	View file
arch/arm/lib/findbit.S	modified	+88	−142	View file
arch/arm/mach-at91/Makefile	modified	+0	−3	View file
arch/arm/mach-at91/pm_suspend.S	modified	+4	−0	View file
arch/arm/mach-imx/Makefile	modified	+0	−3	View file
arch/arm/mach-imx/headsmp.S	modified	+2	−0	View file
arch/arm/mach-imx/resume-imx6.S	modified	+2	−0	View file
arch/arm/mach-imx/suspend-imx6.S	modified	+2	−0	View file
arch/arm/mach-mvebu/Makefile	modified	+0	−3	View file
arch/arm/mach-mvebu/coherency_ll.S	modified	+1	−0	View file
arch/arm/mach-mvebu/pmsu.c	modified	+1	−0	View file
arch/arm/mach-npcm/Makefile	modified	+0	−2	View file
arch/arm/mach-npcm/headsmp.S	modified	+2	−0	View file
arch/arm/mach-tegra/Makefile	modified	+0	−2	View file
arch/arm/mach-tegra/reset-handler.S	modified	+2	−0	View file
arch/arm/mach-tegra/sleep-tegra20.S	modified	+2	−0	View file
arch/arm/mach-tegra/sleep-tegra30.S	modified	+2	−0	View file
arch/arm/mach-tegra/sleep.S	modified	+2	−0	View file
arch/arm/mm/Makefile	modified	+0	−15	View file
arch/arm/mm/abort-ev6.S	modified	+1	−0	View file
arch/arm/mm/abort-ev7.S	modified	+1	−0	View file
arch/arm/mm/cache-v6.S	modified	+2	−0	View file
arch/arm/mm/cache-v7.S	modified	+2	−0	View file
arch/arm/mm/cache-v7m.S	modified	+2	−0	View file
arch/arm/mm/copypage-feroceon.c	modified	+1	−0	View file
arch/arm/mm/fault.c	modified	+3	−2	View file
arch/arm/mm/proc-v6.S	modified	+2	−0	View file
arch/arm/mm/proc-v7-2level.S	modified	+2	−0	View file
arch/arm/mm/proc-v7.S	modified	+2	−0	View file
arch/arm/mm/tlb-v6.S	modified	+2	−0	View file
arch/arm/mm/tlb-v7.S	modified	+2	−0	View file
arch/arm/nwfpe/Makefile	modified	+6	−0	View file
arch/arm/vdso/Makefile	modified	+1	−0	View file
arch/arm/vfp/vfpmodule.c	modified	+32	−0	View file
arch/arm64/include/asm/ptdump.h	modified	+1	−0	View file
drivers/amba/bus.c	modified	+0	−6	View file
drivers/firmware/efi/arm-runtime.c	modified	+2	−2	View file
drivers/memory/Makefile	modified	+0	−2	View file
drivers/memory/ti-emif-sram-pm.S	modified	+1	−0	View file
drivers/soc/bcm/brcmstb/pm/Makefile	modified	+0	−1	View file
drivers/soc/bcm/brcmstb/pm/s2-arm.S	modified	+1	−0	View file

Only the first 600 diff lines are shown. Download the complete patch.

arch/arm/Kconfig

View file

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a08c9d0..65d0daf 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -17,6 +17,7 @@ config ARM
 	select ARCH_HAS_PTE_SPECIAL if ARM_LPAE
 	select ARCH_HAS_SETUP_DMA_OPS
 	select ARCH_HAS_SET_MEMORY
+	select ARCH_STACKWALK
 	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
 	select ARCH_HAS_STRICT_MODULE_RWX if MMU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -27,6 +28,7 @@ config ARM
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG if CPU_V7 || CPU_V7M || CPU_V6K
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_KEEP_MEMBLOCK
+	select ARCH_HAS_UBSAN_SANITIZE_ALL
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
@@ -95,6 +97,7 @@ config ARM
 	select HAVE_EXIT_THREAD
 	select HAVE_FAST_GUP if ARM_LPAE
 	select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
+	select HAVE_FUNCTION_ERROR_INJECTION
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER if !XIP_KERNEL
 	select HAVE_GCC_PLUGINS

arch/arm/Makefile

View file

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c846119..4067f51 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -60,47 +60,54 @@ endif
 KBUILD_CFLAGS	+= $(call cc-option,-fno-ipa-sra)
 
 # This selects which instruction set is used.
+arch-$(CONFIG_CPU_32v7M)	:=-march=armv7-m
+arch-$(CONFIG_CPU_32v7)		:=-march=armv7-a
+arch-$(CONFIG_CPU_32v6)		:=-march=armv6
+# Only override the compiler option if ARMv6. The ARMv6K extensions are
+# always available in ARMv7
+ifeq ($(CONFIG_CPU_32v6),y)
+arch-$(CONFIG_CPU_32v6K)	:=-march=armv6k
+endif
+arch-$(CONFIG_CPU_32v5)		:=-march=armv5te
+arch-$(CONFIG_CPU_32v4T)	:=-march=armv4t
+arch-$(CONFIG_CPU_32v4)		:=-march=armv4
+arch-$(CONFIG_CPU_32v3)		:=-march=armv3m
+
 # Note that GCC does not numerically define an architecture version
 # macro, but instead defines a whole series of macros which makes
 # testing for a specific architecture or later rather impossible.
-arch-$(CONFIG_CPU_32v7M)	=-D__LINUX_ARM_ARCH__=7 -march=armv7-m
-arch-$(CONFIG_CPU_32v7)		=-D__LINUX_ARM_ARCH__=7 -march=armv7-a
-arch-$(CONFIG_CPU_32v6)		=-D__LINUX_ARM_ARCH__=6 -march=armv6
+cpp-$(CONFIG_CPU_32v7M)		:=-D__LINUX_ARM_ARCH__=7
+cpp-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7
+cpp-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6
 # Only override the compiler option if ARMv6. The ARMv6K extensions are
 # always available in ARMv7
 ifeq ($(CONFIG_CPU_32v6),y)
-arch-$(CONFIG_CPU_32v6K)	=-D__LINUX_ARM_ARCH__=6 -march=armv6k
+cpp-$(CONFIG_CPU_32v6K)		:=-D__LINUX_ARM_ARCH__=6
 endif
-arch-$(CONFIG_CPU_32v5)		=-D__LINUX_ARM_ARCH__=5 -march=armv5te
-arch-$(CONFIG_CPU_32v4T)	=-D__LINUX_ARM_ARCH__=4 -march=armv4t
-arch-$(CONFIG_CPU_32v4)		=-D__LINUX_ARM_ARCH__=4 -march=armv4
-arch-$(CONFIG_CPU_32v3)		=-D__LINUX_ARM_ARCH__=3 -march=armv3m
-
-# Evaluate arch cc-option calls now
-arch-y := $(arch-y)
+cpp-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5
+cpp-$(CONFIG_CPU_32v4T)		:=-D__LINUX_ARM_ARCH__=4
+cpp-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4
+cpp-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3
 
 # This selects how we optimise for the processor.
-tune-$(CONFIG_CPU_ARM7TDMI)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM720T)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM740T)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM9TDMI)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM940T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM946E)	=-mtune=arm9e
-tune-$(CONFIG_CPU_ARM920T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM922T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM925T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM926T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_FA526)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_SA110)	=-mtune=strongarm110
-tune-$(CONFIG_CPU_SA1100)	=-mtune=strongarm1100
-tune-$(CONFIG_CPU_XSCALE)	=-mtune=xscale
-tune-$(CONFIG_CPU_XSC3)		=-mtune=xscale
-tune-$(CONFIG_CPU_FEROCEON)	=-mtune=xscale
-tune-$(CONFIG_CPU_V6)		=-mtune=arm1136j-s
-tune-$(CONFIG_CPU_V6K)		=-mtune=arm1136j-s
-
-# Evaluate tune cc-option calls now
-tune-y := $(tune-y)
+tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM946E)	:=-mtune=arm9e
+tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_FA526)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
+tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
+tune-$(CONFIG_CPU_XSCALE)	:=-mtune=xscale
+tune-$(CONFIG_CPU_XSC3)		:=-mtune=xscale
+tune-$(CONFIG_CPU_FEROCEON)	:=-mtune=xscale
+tune-$(CONFIG_CPU_V6)		:=-mtune=arm1136j-s
+tune-$(CONFIG_CPU_V6K)		:=-mtune=arm1136j-s
 
 ifeq ($(CONFIG_AEABI),y)
 CFLAGS_ABI	:=-mabi=aapcs-linux -mfpu=vfp
@@ -117,23 +124,25 @@ CFLAGS_ABI	+= -meabi gnu
 endif
 
 ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
-CFLAGS_ABI	+= -mtp=cp15
+KBUILD_CFLAGS	+= -mtp=cp15
 endif
 
 # Accept old syntax despite ".syntax unified"
 AFLAGS_NOWARN	:=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 
 ifeq ($(CONFIG_THUMB2_KERNEL),y)
-CFLAGS_ISA	:=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
-AFLAGS_ISA	:=$(CFLAGS_ISA) -Wa$(comma)-mthumb
+CFLAGS_ISA	:=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
+AFLAGS_ISA	:=$(CFLAGS_ISA) -Wa$(comma)-mthumb -D__thumb2__=2
+CFLAGS_ISA	+=-mthumb
 else
 CFLAGS_ISA	:=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 AFLAGS_ISA	:=$(CFLAGS_ISA)
 endif
 
 # Need -Uarm for gcc < 3.x
+KBUILD_CPPFLAGS	+=$(cpp-y)
 KBUILD_CFLAGS	+=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
-KBUILD_AFLAGS	+=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
+KBUILD_AFLAGS	+=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
 
 CHECKFLAGS	+= -D__arm__
 

arch/arm/boot/compressed/Makefile

View file

diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 41bcbb4..8c63f0a 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -27,6 +27,7 @@ KASAN_SANITIZE		:= n
 
 # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
 KCOV_INSTRUMENT		:= n
+UBSAN_SANITIZE		:= n
 
 #
 # Architecture dependencies
@@ -163,4 +164,3 @@ $(obj)/piggy_data: $(obj)/../Image FORCE
 $(obj)/piggy.o: $(obj)/piggy_data
 
 CFLAGS_font.o := -Dstatic=
-AFLAGS_hyp-stub.o := -Wa,-march=armv7-a

arch/arm/common/Makefile

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diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 7bae8cb..9733381 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -13,7 +13,5 @@ obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
 obj-$(CONFIG_CPU_V7)		+= secure_cntvoff.o
 obj-$(CONFIG_MCPM)		+= mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o
 CFLAGS_REMOVE_mcpm_entry.o	= -pg
-AFLAGS_mcpm_head.o		:= -march=armv7-a
-AFLAGS_vlock.o			:= -march=armv7-a
 obj-$(CONFIG_BL_SWITCHER)	+= bL_switcher.o
 obj-$(CONFIG_BL_SWITCHER_DUMMY_IF) += bL_switcher_dummy_if.o

arch/arm/common/mcpm_head.S

View file

diff --git a/arch/arm/common/mcpm_head.S b/arch/arm/common/mcpm_head.S
index 291d969..299495c 100644
--- a/arch/arm/common/mcpm_head.S
+++ b/arch/arm/common/mcpm_head.S
@@ -15,6 +15,8 @@
 
 #include "vlock.h"
 
+.arch armv7-a
+
 .if MCPM_SYNC_CLUSTER_CPUS
 .error "cpus must be the first member of struct mcpm_sync_struct"
 .endif

arch/arm/common/vlock.S

View file

diff --git a/arch/arm/common/vlock.S b/arch/arm/common/vlock.S
index f1c7fd4..1fa09c4 100644
--- a/arch/arm/common/vlock.S
+++ b/arch/arm/common/vlock.S
@@ -12,6 +12,8 @@
 #include <linux/linkage.h>
 #include "vlock.h"
 
+.arch armv7-a
+
 /* Select different code if voting flags  can fit in a single word. */
 #if VLOCK_VOTING_SIZE > 4
 #define FEW(x...)

arch/arm/include/asm/assembler.h

View file

diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index 90fbe4a..28e18f7 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -761,6 +761,12 @@ THUMB(	orr	\reg , \reg , #PSR_T_BIT	)
 	.endif
 	.endm
 
+	.if		__LINUX_ARM_ARCH__ < 6
+	.set		.Lrev_l_uses_tmp, 1
+	.else
+	.set		.Lrev_l_uses_tmp, 0
+	.endif
+
 	/*
 	 * bl_r - branch and link to register
 	 *

arch/arm/include/asm/cputype.h

View file

diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index 775cac3..0163c3e 100644
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -25,6 +25,8 @@
 #define CPUID_EXT_ISAR3	0x6c
 #define CPUID_EXT_ISAR4	0x70
 #define CPUID_EXT_ISAR5	0x74
+#define CPUID_EXT_ISAR6	0x7c
+#define CPUID_EXT_PFR2	0x90
 #else
 #define CPUID_EXT_PFR0	"c1, 0"
 #define CPUID_EXT_PFR1	"c1, 1"
@@ -40,6 +42,8 @@
 #define CPUID_EXT_ISAR3	"c2, 3"
 #define CPUID_EXT_ISAR4	"c2, 4"
 #define CPUID_EXT_ISAR5	"c2, 5"
+#define CPUID_EXT_ISAR6	"c2, 7"
+#define CPUID_EXT_PFR2	"c3, 4"
 #endif
 
 #define MPIDR_SMP_BITMASK (0x3 << 30)

arch/arm/include/asm/module.h

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diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index 5546c97..07c51a3 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -37,6 +37,11 @@ struct mod_arch_specific {
 
 struct module;
 u32 get_module_plt(struct module *mod, unsigned long loc, Elf32_Addr val);
+#ifdef CONFIG_ARM_MODULE_PLTS
+bool in_module_plt(unsigned long loc);
+#else
+static inline bool in_module_plt(unsigned long loc) { return false; }
+#endif
 
 #ifdef CONFIG_THUMB2_KERNEL
 #define HAVE_ARCH_KALLSYMS_SYMBOL_VALUE

arch/arm/include/asm/ptdump.h

View file

diff --git a/arch/arm/include/asm/ptdump.h b/arch/arm/include/asm/ptdump.h
index 0c2d3d0..aad1d03 100644
--- a/arch/arm/include/asm/ptdump.h
+++ b/arch/arm/include/asm/ptdump.h
@@ -21,6 +21,7 @@ struct ptdump_info {
 
 void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);
 #ifdef CONFIG_ARM_PTDUMP_DEBUGFS
+#define EFI_RUNTIME_MAP_END	SZ_1G
 void ptdump_debugfs_register(struct ptdump_info *info, const char *name);
 #else
 static inline void ptdump_debugfs_register(struct ptdump_info *info,

arch/arm/include/asm/ptrace.h

View file

diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 1408a6a..483b8dd 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -163,6 +163,10 @@ static inline unsigned long user_stack_pointer(struct pt_regs *regs)
 		((current_stack_pointer | (THREAD_SIZE - 1)) - 7) - 1;	\
 })
 
+static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
+{
+	regs->ARM_r0 = rc;
+}
 
 /*
  * Update ITSTATE after normal execution of an IT block instruction.

arch/arm/include/asm/stacktrace.h

View file

diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h
index 36b2ff4..360f0d2 100644
--- a/arch/arm/include/asm/stacktrace.h
+++ b/arch/arm/include/asm/stacktrace.h
@@ -44,7 +44,7 @@ void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
 
 extern int unwind_frame(struct stackframe *frame);
 extern void walk_stackframe(struct stackframe *frame,
-			    int (*fn)(struct stackframe *, void *), void *data);
+			    bool (*fn)(void *, unsigned long), void *data);
 extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
 		     unsigned long top);
 extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,

arch/arm/include/asm/vfp.h

View file

diff --git a/arch/arm/include/asm/vfp.h b/arch/arm/include/asm/vfp.h
index 19928bf..157ea34 100644
--- a/arch/arm/include/asm/vfp.h
+++ b/arch/arm/include/asm/vfp.h
@@ -87,6 +87,12 @@
 #define MVFR0_DP_BIT		(8)
 #define MVFR0_DP_MASK		(0xf << MVFR0_DP_BIT)
 
+/* MVFR1 bits */
+#define MVFR1_ASIMDHP_BIT	(20)
+#define MVFR1_ASIMDHP_MASK	(0xf << MVFR1_ASIMDHP_BIT)
+#define MVFR1_FPHP_BIT		(24)
+#define MVFR1_FPHP_MASK		(0xf << MVFR1_FPHP_BIT)
+
 /* Bit patterns for decoding the packaged operation descriptors */
 #define VFPOPDESC_LENGTH_BIT	(9)
 #define VFPOPDESC_LENGTH_MASK	(0x07 << VFPOPDESC_LENGTH_BIT)

arch/arm/include/asm/xor.h

View file

diff --git a/arch/arm/include/asm/xor.h b/arch/arm/include/asm/xor.h
index 669cad5..934b549 100644
--- a/arch/arm/include/asm/xor.h
+++ b/arch/arm/include/asm/xor.h
@@ -51,7 +51,7 @@ xor_arm4regs_2(unsigned long bytes, unsigned long * __restrict p1,
 	register unsigned int a1 __asm__("r4");
 	register unsigned int a2 __asm__("r5");
 	register unsigned int a3 __asm__("r6");
-	register unsigned int a4 __asm__("r7");
+	register unsigned int a4 __asm__("r10");
 	register unsigned int b1 __asm__("r8");
 	register unsigned int b2 __asm__("r9");
 	register unsigned int b3 __asm__("ip");
@@ -73,7 +73,7 @@ xor_arm4regs_3(unsigned long bytes, unsigned long * __restrict p1,
 	register unsigned int a1 __asm__("r4");
 	register unsigned int a2 __asm__("r5");
 	register unsigned int a3 __asm__("r6");
-	register unsigned int a4 __asm__("r7");
+	register unsigned int a4 __asm__("r10");
 	register unsigned int b1 __asm__("r8");
 	register unsigned int b2 __asm__("r9");
 	register unsigned int b3 __asm__("ip");

arch/arm/include/uapi/asm/hwcap.h

View file

diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 990199d..6b2023e 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -28,6 +28,12 @@
 #define HWCAP_IDIV	(HWCAP_IDIVA | HWCAP_IDIVT)
 #define HWCAP_LPAE	(1 << 20)
 #define HWCAP_EVTSTRM	(1 << 21)
+#define HWCAP_FPHP	(1 << 22)
+#define HWCAP_ASIMDHP	(1 << 23)
+#define HWCAP_ASIMDDP	(1 << 24)
+#define HWCAP_ASIMDFHM	(1 << 25)
+#define HWCAP_ASIMDBF16	(1 << 26)
+#define HWCAP_I8MM	(1 << 27)
 
 /*
  * HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2
@@ -37,5 +43,7 @@
 #define HWCAP2_SHA1	(1 << 2)
 #define HWCAP2_SHA2	(1 << 3)
 #define HWCAP2_CRC32	(1 << 4)
+#define HWCAP2_SB	(1 << 5)
+#define HWCAP2_SSBS	(1 << 6)
 
 #endif /* _UAPI__ASMARM_HWCAP_H */

arch/arm/kernel/Makefile

View file

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 48737ec..d53f56d 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -70,7 +70,6 @@ obj-$(CONFIG_HAVE_TCM)		+= tcm.o
 obj-$(CONFIG_OF)		+= devtree.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
 obj-$(CONFIG_SWP_EMULATE)	+= swp_emulate.o
-CFLAGS_swp_emulate.o		:= -Wa,-march=armv7-a
 obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
 
 obj-$(CONFIG_CPU_XSCALE)	+= xscale-cp0.o
@@ -99,7 +98,6 @@ CFLAGS_head-inflate-data.o := $(call cc-option,-Wframe-larger-than=10240)
 obj-$(CONFIG_XIP_DEFLATED_DATA) += head-inflate-data.o
 
 obj-$(CONFIG_ARM_VIRT_EXT)	+= hyp-stub.o
-AFLAGS_hyp-stub.o		:=-Wa,-march=armv7-a
 ifeq ($(CONFIG_ARM_PSCI),y)
 obj-$(CONFIG_SMP)		+= psci_smp.o
 endif

arch/arm/kernel/hyp-stub.S

View file

diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index b699b22..3a506b9 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -9,6 +9,8 @@
 #include <asm/assembler.h>
 #include <asm/virt.h>
 
+.arch armv7-a
+
 #ifndef ZIMAGE
 /*
  * For the kernel proper, we need to find out the CPU boot mode long after

arch/arm/kernel/machine_kexec.c

View file

diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index a2e9ac7..46364b6 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -77,6 +77,8 @@ static void machine_crash_nonpanic_core(void *unused)
 {
 	struct pt_regs regs;
 
+	local_fiq_disable();
+
 	crash_setup_regs(&regs, get_irq_regs());
 	printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
 	       smp_processor_id());

arch/arm/kernel/module-plts.c

View file

diff --git a/arch/arm/kernel/module-plts.c b/arch/arm/kernel/module-plts.c
index 1fc309b..af7c322 100644
--- a/arch/arm/kernel/module-plts.c
+++ b/arch/arm/kernel/module-plts.c
@@ -284,3 +284,17 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
 		 mod->arch.core.plt->sh_size, mod->arch.init.plt->sh_size);
 	return 0;
 }
+
+bool in_module_plt(unsigned long loc)
+{
+	struct module *mod;
+	bool ret;
+
+	preempt_disable();
+	mod = __module_text_address(loc);
+	ret = mod && (loc - (u32)mod->arch.core.plt_ent < mod->arch.core.plt_count * PLT_ENT_SIZE ||
+		      loc - (u32)mod->arch.init.plt_ent < mod->arch.init.plt_count * PLT_ENT_SIZE);
+	preempt_enable();
+
+	return ret;
+}

arch/arm/kernel/perf_callchain.c

View file

diff --git a/arch/arm/kernel/perf_callchain.c b/arch/arm/kernel/perf_callchain.c
index bc6b246..7147edb 100644
--- a/arch/arm/kernel/perf_callchain.c
+++ b/arch/arm/kernel/perf_callchain.c
@@ -81,13 +81,12 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
  * whist unwinding the stackframe and is like a subroutine return so we use
  * the PC.
  */
-static int
-callchain_trace(struct stackframe *fr,
-		void *data)
+static bool
+callchain_trace(void *data, unsigned long pc)
 {
 	struct perf_callchain_entry_ctx *entry = data;
-	perf_callchain_store(entry, fr->pc);
-	return 0;
+	perf_callchain_store(entry, pc);
+	return true;
 }
 
 void

arch/arm/kernel/return_address.c

View file

diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
index 38f1ea9..ac15db6 100644
--- a/arch/arm/kernel/return_address.c
+++ b/arch/arm/kernel/return_address.c
@@ -16,17 +16,17 @@ struct return_address_data {
 	void *addr;
 };
 
-static int save_return_addr(struct stackframe *frame, void *d)
+static bool save_return_addr(void *d, unsigned long pc)
 {
 	struct return_address_data *data = d;
 
 	if (!data->level) {
-		data->addr = (void *)frame->pc;
+		data->addr = (void *)pc;
 
-		return 1;
+		return false;
 	} else {
 		--data->level;
-		return 0;
+		return true;
 	}
 }
 

arch/arm/kernel/setup.c

View file

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index cb88c6e..75cd469 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -450,6 +450,8 @@ static void __init cpuid_init_hwcaps(void)
 {
 	int block;
 	u32 isar5;
+	u32 isar6;
+	u32 pfr2;
 
 	if (cpu_architecture() < CPU_ARCH_ARMv7)
 		return;
@@ -485,6 +487,18 @@ static void __init cpuid_init_hwcaps(void)
 	block = cpuid_feature_extract_field(isar5, 16);
 	if (block >= 1)
 		elf_hwcap2 |= HWCAP2_CRC32;
+
+	/* Check for Speculation barrier instruction */
+	isar6 = read_cpuid_ext(CPUID_EXT_ISAR6);
+	block = cpuid_feature_extract_field(isar6, 12);
+	if (block >= 1)
+		elf_hwcap2 |= HWCAP2_SB;
+
+	/* Check for Speculative Store Bypassing control */
+	pfr2 = read_cpuid_ext(CPUID_EXT_PFR2);
+	block = cpuid_feature_extract_field(pfr2, 4);
+	if (block >= 1)
+		elf_hwcap2 |= HWCAP2_SSBS;
 }
 
 static void __init elf_hwcap_fixup(void)
@@ -1249,6 +1263,12 @@ static const char *hwcap_str[] = {
 	"vfpd32",
 	"lpae",
 	"evtstrm",
+	"fphp",
+	"asimdhp",
+	"asimddp",
+	"asimdfhm",
+	"asimdbf16",
+	"i8mm",
 	NULL
 };
 
@@ -1258,6 +1278,8 @@ static const char *hwcap2_str[] = {
 	"sha1",
 	"sha2",
 	"crc32",
+	"sb",
+	"ssbs",
 	NULL
 };
 

arch/arm/kernel/smp.c

View file

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 978db2d..36e6efa 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -600,6 +600,8 @@ static DEFINE_RAW_SPINLOCK(stop_lock);
  */
 static void ipi_cpu_stop(unsigned int cpu)
 {
+	local_fiq_disable();
+
 	if (system_state <= SYSTEM_RUNNING) {
 		raw_spin_lock(&stop_lock);
 		pr_crit("CPU%u: stopping\n", cpu);
@@ -609,9 +611,6 @@ static void ipi_cpu_stop(unsigned int cpu)
 
 	set_cpu_online(cpu, false);
 
-	local_fiq_disable();
-	local_irq_disable();
-
 	while (1) {
 		cpu_relax();
 		wfe();

arch/arm/kernel/stacktrace.c

View file

diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index 85443b5..620aa82 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -127,12 +127,12 @@ int notrace unwind_frame(struct stackframe *frame)
 #endif
 
 void notrace walk_stackframe(struct stackframe *frame,
-		     int (*fn)(struct stackframe *, void *), void *data)
+		     bool (*fn)(void *, unsigned long), void *data)
 {
 	while (1) {
 		int ret;
 
-		if (fn(frame, data))
+		if (!fn(data, frame->pc))
 			break;
 		ret = unwind_frame(frame);
 		if (ret < 0)
@@ -142,41 +142,32 @@ void notrace walk_stackframe(struct stackframe *frame,
 EXPORT_SYMBOL(walk_stackframe);
 
 #ifdef CONFIG_STACKTRACE
-struct stack_trace_data {
-	struct stack_trace *trace;
-	unsigned int no_sched_functions;
-	unsigned int skip;
-};
-
-static int save_trace(struct stackframe *frame, void *d)
+static void start_stack_trace(struct stackframe *frame, struct task_struct *task,
+			      unsigned long fp, unsigned long sp,
+			      unsigned long lr, unsigned long pc)
 {
-	struct stack_trace_data *data = d;
-	struct stack_trace *trace = data->trace;
-	unsigned long addr = frame->pc;
-
-	if (data->no_sched_functions && in_sched_functions(addr))
-		return 0;
-	if (data->skip) {
-		data->skip--;
-		return 0;
-	}