Le 04/10/2022 à 08:33, Nicholas Piggin a écrit :
> Context tracking involves tracking user, kernel, guest switches. This
> enables existing context tracking code for interrupt entry on 32-bit.
> KVM and interrupt exit already has context tracking calls.
> 
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
> ---
>   arch/powerpc/Kconfig                 |  2 +-
>   arch/powerpc/include/asm/interrupt.h | 21 ++++++---------------
>   2 files changed, 7 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 81c9f895d690..f667279ec74c 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -204,7 +204,7 @@ config PPC
>       select HAVE_ARCH_SECCOMP_FILTER
>       select HAVE_ARCH_TRACEHOOK
>       select HAVE_ASM_MODVERSIONS
> -     select HAVE_CONTEXT_TRACKING_USER               if PPC64
> +     select HAVE_CONTEXT_TRACKING_USER
>       select HAVE_C_RECORDMCOUNT
>       select HAVE_DEBUG_KMEMLEAK
>       select HAVE_DEBUG_STACKOVERFLOW
> diff --git a/arch/powerpc/include/asm/interrupt.h 
> b/arch/powerpc/include/asm/interrupt.h
> index 4745bb9998bd..8860a246d51a 100644
> --- a/arch/powerpc/include/asm/interrupt.h
> +++ b/arch/powerpc/include/asm/interrupt.h
> @@ -85,6 +85,8 @@ do {                                                        
>                 \
>           (user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM)))     \
>               BUG_ON(cond);                                           \
>   } while (0)
> +#else
> +#define INT_SOFT_MASK_BUG_ON(regs, cond)

Here you can just drop the ifdef CONFIG_PPC64 I guess instead of adding 
an additional empty macro.

>   #endif
>   
>   #ifdef CONFIG_PPC_BOOK3S_64
> @@ -152,19 +154,8 @@ static inline void booke_restore_dbcr0(void)
>   static inline void interrupt_enter_prepare(struct pt_regs *regs)
>   {
>   #ifdef CONFIG_PPC32
> -     if (!arch_irq_disabled_regs(regs))
> -             trace_hardirqs_off();
> -
> -     if (user_mode(regs))
> -             kuap_lock();
> -     else
> -             kuap_save_and_lock(regs);
> -
> -     if (user_mode(regs))
> -             account_cpu_user_entry();
> -#endif
> -
> -#ifdef CONFIG_PPC64
> +     bool trace_enable = !arch_irq_disabled_regs(regs);

nit: You could be put this as an #else to the existing #ifdef CONFIG_PPC64

> +#else
>       bool trace_enable = false;
>   
>       if (IS_ENABLED(CONFIG_TRACE_IRQFLAGS)) {
> @@ -188,8 +179,9 @@ static inline void interrupt_enter_prepare(struct pt_regs 
> *regs)
>       } else {
>               __hard_RI_enable();
>       }
> +     /* Only call trace_hardirqs_off when RI=1, it can cause SLB faults */
> +#endif
>   
> -     /* Do this when RI=1 because it can cause SLB faults */
>       if (trace_enable)
>               trace_hardirqs_off();
>   
> @@ -215,7 +207,6 @@ static inline void interrupt_enter_prepare(struct pt_regs 
> *regs)
>       }
>       INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
>                                  !(regs->msr & MSR_EE));
> -#endif
>   
>       booke_restore_dbcr0();
>   }

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