From 95731b8ee63ec9419822a51cd9878fa32582fdd2 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 11 Feb 2021 09:25:34 +0100 Subject: ARM: 9059/1: cache-v7: get rid of mini-stack Now that we have reduced the number of registers that we need to preserve when calling v7_invalidate_l1 from the boot code, we can use scratch registers to preserve the remaining ones, and get rid of the mini stack entirely. This works around any issues regarding cache behavior in relation to the uncached accesses to this memory, which is hard to get right in the general case (i.e., both bare metal and under virtualization) While at it, switch v7_invalidate_l1 to using ip as a scratch register instead of r4. This makes the function AAPCS compliant, and removes the need to stash r4 in ip across the call. Acked-by: Nicolas Pitre Signed-off-by: Ard Biesheuvel Signed-off-by: Russell King --- arch/arm/include/asm/memory.h | 15 --------------- 1 file changed, 15 deletions(-) (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 2f841cb65c30..a711322d9f40 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -150,21 +150,6 @@ extern unsigned long vectors_base; */ #define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET) -#ifdef CONFIG_XIP_KERNEL -/* - * When referencing data in RAM from the XIP region in a relative manner - * with the MMU off, we need the relative offset between the two physical - * addresses. The macro below achieves this, which is: - * __pa(v_data) - __xip_pa(v_text) - */ -#define PHYS_RELATIVE(v_data, v_text) \ - (((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \ - ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \ - CONFIG_XIP_PHYS_ADDR)) -#else -#define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text)) -#endif - #ifndef __ASSEMBLY__ /* -- cgit v1.2.3 From 08cbcb9702566a3c2c2af3a1e5899b72c162f45d Mon Sep 17 00:00:00 2001 From: Joel Stanley Date: Thu, 11 Feb 2021 10:35:30 +0100 Subject: ARM: 9060/1: kexec: Remove unused kexec_reinit callback The last (only?) user of this was removed in commit ba364fc752da ("ARM: Kirkwood: Remove mach-kirkwood"), back in v3.17. Link: https://lore.kernel.org/r/20210210235243.398810-1-joel@jms.id.au Signed-off-by: Joel Stanley Reviewed-by: Arnd Bergmann Signed-off-by: Russell King --- arch/arm/include/asm/kexec.h | 3 --- arch/arm/kernel/machine_kexec.c | 8 -------- 2 files changed, 11 deletions(-) (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/kexec.h b/arch/arm/include/asm/kexec.h index 22751b5b5735..e62832dcba76 100644 --- a/arch/arm/include/asm/kexec.h +++ b/arch/arm/include/asm/kexec.h @@ -56,9 +56,6 @@ static inline void crash_setup_regs(struct pt_regs *newregs, } } -/* Function pointer to optional machine-specific reinitialization */ -extern void (*kexec_reinit)(void); - static inline unsigned long phys_to_boot_phys(phys_addr_t phys) { return phys_to_idmap(phys); diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index 2b09dad7935e..f567032a09c0 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -147,11 +147,6 @@ void machine_crash_shutdown(struct pt_regs *regs) pr_info("Loading crashdump kernel...\n"); } -/* - * Function pointer to optional machine-specific reinitialization - */ -void (*kexec_reinit)(void); - void machine_kexec(struct kimage *image) { unsigned long page_list, reboot_entry_phys; @@ -187,9 +182,6 @@ void machine_kexec(struct kimage *image) pr_info("Bye!\n"); - if (kexec_reinit) - kexec_reinit(); - soft_restart(reboot_entry_phys); } -- cgit v1.2.3 From 32e9a0d5ffaffe035f99188602d328665c43f38f Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 1 Mar 2021 15:29:03 +0100 Subject: ARM: 9067/1: syscalls: switch to generic syscallhdr.sh Many architectures duplicate similar shell scripts. This commit converts ARM to use scripts/syscallhdr.sh, and also collects OABI/OEBI syscalls into unistd-eabi.h/unistd-oabi.h, removing unistd-common.h. Signed-off-by: Masahiro Yamada Signed-off-by: Russell King --- arch/arm/include/uapi/asm/Kbuild | 1 - arch/arm/include/uapi/asm/unistd.h | 1 - arch/arm/tools/Makefile | 17 +++++------------ arch/arm/tools/syscallhdr.sh | 31 ------------------------------- 4 files changed, 5 insertions(+), 45 deletions(-) delete mode 100644 arch/arm/tools/syscallhdr.sh (limited to 'arch/arm/include') diff --git a/arch/arm/include/uapi/asm/Kbuild b/arch/arm/include/uapi/asm/Kbuild index ce8573157774..63748af8bc9d 100644 --- a/arch/arm/include/uapi/asm/Kbuild +++ b/arch/arm/include/uapi/asm/Kbuild @@ -1,6 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -generated-y += unistd-common.h generated-y += unistd-oabi.h generated-y += unistd-eabi.h generic-y += kvm_para.h diff --git a/arch/arm/include/uapi/asm/unistd.h b/arch/arm/include/uapi/asm/unistd.h index 93ecf8aa4fe5..ae7749e15726 100644 --- a/arch/arm/include/uapi/asm/unistd.h +++ b/arch/arm/include/uapi/asm/unistd.h @@ -24,7 +24,6 @@ #include #endif -#include #define __NR_sync_file_range2 __NR_arm_sync_file_range /* diff --git a/arch/arm/tools/Makefile b/arch/arm/tools/Makefile index d8be90f2bb41..87de1f63f649 100644 --- a/arch/arm/tools/Makefile +++ b/arch/arm/tools/Makefile @@ -8,7 +8,7 @@ gen := arch/$(ARCH)/include/generated kapi := $(gen)/asm uapi := $(gen)/uapi/asm -syshdr := $(srctree)/$(src)/syscallhdr.sh +syshdr := $(srctree)/scripts/syscallhdr.sh sysnr := $(srctree)/$(src)/syscallnr.sh systbl := $(srctree)/scripts/syscalltbl.sh syscall := $(src)/syscall.tbl @@ -17,7 +17,6 @@ gen-y := $(gen)/calls-oabi.S gen-y += $(gen)/calls-eabi.S kapi-hdrs-y := $(kapi)/unistd-nr.h kapi-hdrs-y += $(kapi)/mach-types.h -uapi-hdrs-y := $(uapi)/unistd-common.h uapi-hdrs-y += $(uapi)/unistd-oabi.h uapi-hdrs-y += $(uapi)/unistd-eabi.h @@ -41,10 +40,8 @@ $(kapi)/mach-types.h: $(src)/gen-mach-types $(src)/mach-types FORCE $(call if_changed,gen_mach) quiet_cmd_syshdr = SYSHDR $@ - cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \ - '$(syshdr_abi_$(basetarget))' \ - '$(syshdr_pfx_$(basetarget))' \ - '__NR_SYSCALL_BASE' + cmd_syshdr = $(CONFIG_SHELL) $(syshdr) --abis $(abis) \ + --offset __NR_SYSCALL_BASE $< $@ quiet_cmd_systbl = SYSTBL $@ cmd_systbl = $(CONFIG_SHELL) $(systbl) --abis $(abis) $< $@ @@ -53,15 +50,11 @@ quiet_cmd_sysnr = SYSNR $@ cmd_sysnr = $(CONFIG_SHELL) '$(sysnr)' '$<' '$@' \ '$(syshdr_abi_$(basetarget))' -syshdr_abi_unistd-common := common -$(uapi)/unistd-common.h: $(syscall) $(syshdr) FORCE - $(call if_changed,syshdr) - -syshdr_abi_unistd-oabi := oabi +$(uapi)/unistd-oabi.h: abis := common,oabi $(uapi)/unistd-oabi.h: $(syscall) $(syshdr) FORCE $(call if_changed,syshdr) -syshdr_abi_unistd-eabi := eabi +$(uapi)/unistd-eabi.h: abis := common,eabi $(uapi)/unistd-eabi.h: $(syscall) $(syshdr) FORCE $(call if_changed,syshdr) diff --git a/arch/arm/tools/syscallhdr.sh b/arch/arm/tools/syscallhdr.sh deleted file mode 100644 index 6b2f25cdd721..000000000000 --- a/arch/arm/tools/syscallhdr.sh +++ /dev/null @@ -1,31 +0,0 @@ -#!/bin/sh -# SPDX-License-Identifier: GPL-2.0 - -in="$1" -out="$2" -my_abis=`echo "($3)" | tr ',' '|'` -prefix="$4" -offset="$5" - -fileguard=_ASM_ARM_`basename "$out" | sed \ - -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ - -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'` -if echo $out | grep -q uapi; then - fileguard="_UAPI$fileguard" -fi -grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | ( - echo "#ifndef ${fileguard}" - echo "#define ${fileguard} 1" - echo "" - - while read nr abi name entry ; do - if [ -z "$offset" ]; then - echo "#define __NR_${prefix}${name} $nr" - else - echo "#define __NR_${prefix}${name} ($offset + $nr)" - fi - done - - echo "" - echo "#endif /* ${fileguard} */" -) > "$out" -- cgit v1.2.3 From aefdd4383bb0057c1ec1e32e7de348ccd749eb20 Mon Sep 17 00:00:00 2001 From: "Jisheng Zhang (syna)" Date: Mon, 12 Apr 2021 09:05:48 +0100 Subject: ARM: 9072/1: mm: remove set_kernel_text_r[ow]() After commit 5a735583b764 ("arm/ftrace: Use __patch_text()"), the last and only user of these functions has gone, remove them. Signed-off-by: Jisheng Zhang Signed-off-by: Russell King --- arch/arm/include/asm/set_memory.h | 8 -------- arch/arm/mm/init.c | 21 --------------------- 2 files changed, 29 deletions(-) (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/set_memory.h b/arch/arm/include/asm/set_memory.h index a1ceff4295d3..ec17fc0fda7a 100644 --- a/arch/arm/include/asm/set_memory.h +++ b/arch/arm/include/asm/set_memory.h @@ -18,12 +18,4 @@ static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } #endif -#ifdef CONFIG_STRICT_KERNEL_RWX -void set_kernel_text_rw(void); -void set_kernel_text_ro(void); -#else -static inline void set_kernel_text_rw(void) { } -static inline void set_kernel_text_ro(void) { } -#endif - #endif diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 828a2561b229..039c19597c7a 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -487,33 +487,12 @@ static int __mark_rodata_ro(void *unused) return 0; } -static int kernel_set_to_readonly __read_mostly; - void mark_rodata_ro(void) { - kernel_set_to_readonly = 1; stop_machine(__mark_rodata_ro, NULL, NULL); debug_checkwx(); } -void set_kernel_text_rw(void) -{ - if (!kernel_set_to_readonly) - return; - - set_section_perms(ro_perms, ARRAY_SIZE(ro_perms), false, - current->active_mm); -} - -void set_kernel_text_ro(void) -{ - if (!kernel_set_to_readonly) - return; - - set_section_perms(ro_perms, ARRAY_SIZE(ro_perms), true, - current->active_mm); -} - #else static inline void fix_kernmem_perms(void) { } #endif /* CONFIG_STRICT_KERNEL_RWX */ -- cgit v1.2.3