diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1197b5596d5ad8959d242bd5f1666690e368de7d..e90d16da96858f4cc2e3103b1a2579bb2d2100ca 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -91,6 +91,7 @@ config X86 select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_USE_SYM_ANNOTATIONS select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH select ARCH_WANT_DEFAULT_BPF_JIT if X86_64 select ARCH_WANTS_DYNAMIC_TASK_STRUCT diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 2e74690b028a5b93306f689b9cd9ef8f82649e5c..f909d3ce36e6e289d8077715b18cc63de9a45f56 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -99,15 +99,6 @@ config DEBUG_WX If in doubt, say "Y". -config DOUBLEFAULT - default y - bool "Enable doublefault exception handler" if EXPERT && X86_32 - ---help--- - This option allows trapping of rare doublefault exceptions that - would otherwise cause a system to silently reboot. Disabling this - option saves about 4k and might cause you much additional grey - hair. - config DEBUG_TLBFLUSH bool "Set upper limit of TLB entries to flush one-by-one" depends on DEBUG_KERNEL diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index b67bae7091d7ecf9d5319b976c10be5e6045caa2..5c9c7eee63254fd4718194dbe39bdd6a5792ce50 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -1536,7 +1536,6 @@ SYM_CODE_START(debug) jmp common_exception SYM_CODE_END(debug) -#ifdef CONFIG_DOUBLEFAULT SYM_CODE_START(double_fault) 1: /* @@ -1576,7 +1575,6 @@ SYM_CODE_START(double_fault) hlt jmp 1b SYM_CODE_END(double_fault) -#endif /* * NMI is doubly nasty. It can happen on the first instruction of diff --git a/arch/x86/include/asm/doublefault.h b/arch/x86/include/asm/doublefault.h index af9a14ac896262a097707757e616b45c94ebc74a..54a6e4a2e132d1b9527a90793ba60ece450be07c 100644 --- a/arch/x86/include/asm/doublefault.h +++ b/arch/x86/include/asm/doublefault.h @@ -2,7 +2,7 @@ #ifndef _ASM_X86_DOUBLEFAULT_H #define _ASM_X86_DOUBLEFAULT_H -#if defined(CONFIG_X86_32) && defined(CONFIG_DOUBLEFAULT) +#ifdef CONFIG_X86_32 extern void doublefault_init_cpu_tss(void); #else static inline void doublefault_init_cpu_tss(void) diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index c26a7e1d8a2c491ca6f004a716031393a5f35ece..70bd0f356e5d55b23e1700ddbc5b74f4b8a4e97b 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -69,9 +69,7 @@ dotraplinkage void do_overflow(struct pt_regs *regs, long error_code); dotraplinkage void do_bounds(struct pt_regs *regs, long error_code); dotraplinkage void do_invalid_op(struct pt_regs *regs, long error_code); dotraplinkage void do_device_not_available(struct pt_regs *regs, long error_code); -#if defined(CONFIG_X86_64) || defined(CONFIG_DOUBLEFAULT) dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsigned long cr2); -#endif dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *regs, long error_code); dotraplinkage void do_invalid_TSS(struct pt_regs *regs, long error_code); dotraplinkage void do_segment_not_present(struct pt_regs *regs, long error_code); diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index ba89cabe5fcf1136cb42d9cb6fa24c75e401bd0c..2a7c3afa62e2ef308fdb1294395c31efb11cc3a1 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -102,9 +102,7 @@ obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o obj-y += kprobes/ obj-$(CONFIG_MODULES) += module.o -ifeq ($(CONFIG_X86_32),y) -obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o -endif +obj-$(CONFIG_X86_32) += doublefault_32.o obj-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_VM86) += vm86_32.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c index 8e3a8fedfa4d705086376671d63d081898df971c..722fd712e1cf029adff9a73c73aad44992dbcef6 100644 --- a/arch/x86/kernel/dumpstack_32.c +++ b/arch/x86/kernel/dumpstack_32.c @@ -87,7 +87,6 @@ static bool in_softirq_stack(unsigned long *stack, struct stack_info *info) static bool in_doublefault_stack(unsigned long *stack, struct stack_info *info) { -#ifdef CONFIG_DOUBLEFAULT struct cpu_entry_area *cea = get_cpu_entry_area(raw_smp_processor_id()); struct doublefault_stack *ss = &cea->doublefault_stack; @@ -103,9 +102,6 @@ static bool in_doublefault_stack(unsigned long *stack, struct stack_info *info) info->next_sp = (unsigned long *)this_cpu_read(cpu_tss_rw.x86_tss.sp); return true; -#else - return false; -#endif } diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index d54cffdc7cac2b5c55b272c7df3a8756fbd024c1..e85561fc0dc8905fccba36b4bbbfccad153dfc3e 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -326,7 +326,6 @@ __visible void __noreturn handle_stack_overflow(const char *message, } #endif -#if defined(CONFIG_X86_64) || defined(CONFIG_DOUBLEFAULT) /* * Runs on an IST stack for x86_64 and on a special task stack for x86_32. * @@ -450,7 +449,6 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsign die("double fault", regs, error_code); panic("Machine halted."); } -#endif dotraplinkage void do_bounds(struct pt_regs *regs, long error_code) { diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index 56f9189bbadb4700973d3ff1b1be85c710ffd463..5199d8a1daf1f0ce3a82c6e301eba7efad25737c 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -17,7 +17,7 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(struct exception_stacks, exception_stacks); DEFINE_PER_CPU(struct cea_exception_stacks*, cea_exception_stacks); #endif -#if defined(CONFIG_X86_32) && defined(CONFIG_DOUBLEFAULT) +#ifdef CONFIG_X86_32 DECLARE_PER_CPU_PAGE_ALIGNED(struct doublefault_stack, doublefault_stack); #endif @@ -114,12 +114,10 @@ static void __init percpu_setup_exception_stacks(unsigned int cpu) #else static inline void percpu_setup_exception_stacks(unsigned int cpu) { -#ifdef CONFIG_DOUBLEFAULT struct cpu_entry_area *cea = get_cpu_entry_area(cpu); cea_map_percpu_pages(&cea->doublefault_stack, &per_cpu(doublefault_stack, cpu), 1, PAGE_KERNEL); -#endif } #endif diff --git a/include/linux/linkage.h b/include/linux/linkage.h index 9280209d1f62c887d18c9de38f100a51c33b721d..d796ec20d1145ca6cdd4f311e567878fa220c5bf 100644 --- a/include/linux/linkage.h +++ b/include/linux/linkage.h @@ -105,7 +105,7 @@ /* === DEPRECATED annotations === */ -#ifndef CONFIG_X86 +#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS #ifndef GLOBAL /* deprecated, use SYM_DATA*, SYM_ENTRY, or similar */ #define GLOBAL(name) \ @@ -118,10 +118,10 @@ #define ENTRY(name) \ SYM_FUNC_START(name) #endif -#endif /* CONFIG_X86 */ +#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */ #endif /* LINKER_SCRIPT */ -#ifndef CONFIG_X86 +#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS #ifndef WEAK /* deprecated, use SYM_FUNC_START_WEAK* */ #define WEAK(name) \ @@ -143,7 +143,7 @@ #define ENDPROC(name) \ SYM_FUNC_END(name) #endif -#endif /* CONFIG_X86 */ +#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */ /* === generic annotations === */ diff --git a/lib/Kconfig b/lib/Kconfig index 5d53f9609c252c1eccaad0e34378794efe0f1998..e831e1f01767872062510a27780caa5583ac1e4e 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -80,6 +80,9 @@ config ARCH_USE_CMPXCHG_LOCKREF config ARCH_HAS_FAST_MULTIPLIER bool +config ARCH_USE_SYM_ANNOTATIONS + bool + config INDIRECT_PIO bool "Access I/O in non-MMIO mode" depends on ARM64 diff --git a/tools/testing/selftests/wireguard/qemu/debug.config b/tools/testing/selftests/wireguard/qemu/debug.config index 5909e7ef2a5c5c1a30b40e4c7d58ff585335e756..807fa7dc60b86ece6ab59647167b35cc5b23a122 100644 --- a/tools/testing/selftests/wireguard/qemu/debug.config +++ b/tools/testing/selftests/wireguard/qemu/debug.config @@ -58,7 +58,6 @@ CONFIG_RCU_EQS_DEBUG=y CONFIG_USER_STACKTRACE_SUPPORT=y CONFIG_DEBUG_SG=y CONFIG_DEBUG_NOTIFIERS=y -CONFIG_DOUBLEFAULT=y CONFIG_X86_DEBUG_FPU=y CONFIG_DEBUG_SECTION_MISMATCH=y CONFIG_DEBUG_PAGEALLOC=y