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McKenney" , Jinjie Ruan , Arnd Bergmann , Ard Biesheuvel , Al Viro Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Linus Walleij X-Mailer: b4 0.14.2 This adds a few calls to C when exceptions enter/exit from the kernel itself, so these can be used for generic entry. Signed-off-by: Linus Walleij --- arch/arm/include/asm/entry.h | 2 ++ arch/arm/kernel/entry-armv.S | 3 +++ arch/arm/kernel/entry-header.S | 5 +++++ arch/arm/kernel/entry.c | 8 ++++++++ 4 files changed, 18 insertions(+) diff --git a/arch/arm/include/asm/entry.h b/arch/arm/include/asm/entry.h index 8b8cc9a1eefbd00dd75d4e344576fc184a413768..a78bc5054b093120e903f08369fb8b1a9feb7f81 100644 --- a/arch/arm/include/asm/entry.h +++ b/arch/arm/include/asm/entry.h @@ -12,5 +12,7 @@ long syscall_enter_from_user_mode(struct pt_regs *regs, long); void syscall_exit_to_user_mode(struct pt_regs *regs); void irqentry_enter_from_user_mode(struct pt_regs *regs); void irqentry_exit_to_user_mode(struct pt_regs *regs); +void irqentry_enter_from_kernel_mode(struct pt_regs *regs); +void irqentry_exit_to_kernel_mode(struct pt_regs *regs); #endif /* __ASM_ENTRY_H__ */ diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 3cd5a80b47758867d1db6c3971030370bca1551a..f64c4cc8beda6bcd469e6ff1a1f337d52dbbaf9c 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -205,6 +205,9 @@ ENDPROC(__und_invalid) get_thread_info tsk uaccess_entry tsk, r0, r1, r2, \uaccess + mov r0, sp @ 'regs' + bl irqentry_enter_from_kernel_mode + .if \trace #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_off diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index 51c7f93c1ded1db56f173c7aaed8094ef011ff5a..49a9c5cf6fd5fbb917f2ada6c0d6cc400b7d3fb3 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -210,6 +210,7 @@ .else @ IRQs off again before pulling preserved data off the stack disable_irq_notrace + #ifdef CONFIG_TRACE_IRQFLAGS tst \rpsr, #PSR_I_BIT bleq trace_hardirqs_on @@ -217,6 +218,10 @@ blne trace_hardirqs_off #endif .endif + + mov r0, sp @ 'regs' + bl irqentry_exit_to_kernel_mode + uaccess_exit tsk, r0, r1 #ifndef CONFIG_THUMB2_KERNEL diff --git a/arch/arm/kernel/entry.c b/arch/arm/kernel/entry.c index d7fdb9df33312dd2a914b59512b701748f33b597..674b5adcec0001b7d075d6936bfb4e318cb7ce74 100644 --- a/arch/arm/kernel/entry.c +++ b/arch/arm/kernel/entry.c @@ -56,3 +56,11 @@ noinstr void irqentry_exit_to_user_mode(struct pt_regs *regs) /* This context tracking call has inverse naming */ user_enter_callable(); } + +noinstr void irqentry_enter_from_kernel_mode(struct pt_regs *regs) +{ +} + +noinstr void irqentry_exit_to_kernel_mode(struct pt_regs *regs) +{ +} -- 2.47.1