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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-18 01:51:13 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-25 00:06:57 +1000 |
| commit | a214ee8802adb864d175ea6ca4176223bcc11d2b (patch) | |
| tree | eb9d4628bc2fa014213101b7299c2297bdaa3552 /arch/powerpc/kernel | |
| parent | f84aa284947f325c5697d35b92abd2047224f24b (diff) | |
| download | linux-a214ee8802adb864d175ea6ca4176223bcc11d2b.tar.gz linux-a214ee8802adb864d175ea6ca4176223bcc11d2b.tar.bz2 linux-a214ee8802adb864d175ea6ca4176223bcc11d2b.zip | |
powerpc/interrupt: Refactor interrupt_exit_user_prepare()
interrupt_exit_user_prepare() is a superset of
interrupt_exit_user_prepare_main().
Refactor to avoid code duplication.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210617155116.2167984-15-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/interrupt.c | 57 |
1 files changed, 3 insertions, 54 deletions
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c index a579e1d5e6ed..33efa01ec63f 100644 --- a/arch/powerpc/kernel/interrupt.c +++ b/arch/powerpc/kernel/interrupt.c @@ -404,9 +404,7 @@ notrace unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *reg notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs) { - unsigned long ti_flags; - unsigned long flags; - unsigned long ret = 0; + unsigned long ret; if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x)) BUG_ON(!(regs->msr & MSR_RI)); @@ -420,63 +418,14 @@ notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs) */ kuap_assert_locked(); - local_irq_save(flags); - -again: - ti_flags = READ_ONCE(current_thread_info()->flags); - while (unlikely(ti_flags & (_TIF_USER_WORK_MASK & ~_TIF_RESTORE_TM))) { - local_irq_enable(); /* returning to user: may enable */ - if (ti_flags & _TIF_NEED_RESCHED) { - schedule(); - } else { - if (ti_flags & _TIF_SIGPENDING) - ret |= _TIF_RESTOREALL; - do_notify_resume(regs, ti_flags); - } - local_irq_disable(); - ti_flags = READ_ONCE(current_thread_info()->flags); - } - - if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && IS_ENABLED(CONFIG_PPC_FPU)) { - if (IS_ENABLED(CONFIG_PPC_TRANSACTIONAL_MEM) && - unlikely((ti_flags & _TIF_RESTORE_TM))) { - restore_tm_state(regs); - } else { - unsigned long mathflags = MSR_FP; - - if (cpu_has_feature(CPU_FTR_VSX)) - mathflags |= MSR_VEC | MSR_VSX; - else if (cpu_has_feature(CPU_FTR_ALTIVEC)) - mathflags |= MSR_VEC; - - /* See above restore_math comment */ - if ((regs->msr & mathflags) != mathflags) - restore_math(regs); - } - } - - if (!prep_irq_for_user_exit()) { - local_irq_enable(); - local_irq_disable(); - goto again; - } - - booke_load_dbcr0(); - -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM - local_paca->tm_scratch = regs->msr; -#endif + local_irq_disable(); - account_cpu_user_exit(); + ret = interrupt_exit_user_prepare_main(0, regs); #ifdef CONFIG_PPC64 regs->exit_result = ret; #endif - /* Restore user access locks last */ - kuap_user_restore(regs); - kuep_unlock(); - return ret; } |