powerpc/64/syscall: Reconcile interrupts

	ld	r11,exception_marker@toc(r2)

	std	r11,-16(r10)		/* "regshere" marker */

	/*

	 * RECONCILE_IRQ_STATE without calling trace_hardirqs_off(), which

	 * would clobber syscall parameters. Also we always enter with IRQs

	 * enabled and nothing pending. system_call_exception() will call

	 * trace_hardirqs_off().

	 */

	li	r11,IRQS_ALL_DISABLED

	li	r12,PACA_IRQ_HARD_DIS

	stb	r11,PACAIRQSOFTMASK(r13)

	stb	r12,PACAIRQHAPPENED(r13)

	/* Calling convention has r9 = orig r0, r10 = regs */

	mr	r9,r0

	bl	system_call_exception

typedef long (*syscall_fn)(long, long, long, long, long, long);

/* Has to run notrace because it is entered "unreconciled" */

notrace long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,

/* Has to run notrace because it is entered not completely "reconciled" */

notrace long system_call_exception(long r3, long r4, long r5,

				   long r6, long r7, long r8,

				   unsigned long r0, struct pt_regs *regs)

{

	unsigned long ti_flags;

	syscall_fn f;

	if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))

		BUG_ON(irq_soft_mask_return() != IRQS_ALL_DISABLED);

	trace_hardirqs_off(); /* finish reconciling */

	if (IS_ENABLED(CONFIG_PPC_BOOK3S))

		BUG_ON(!(regs->msr & MSR_RI));

	BUG_ON(!(regs->msr & MSR_PR));

	kuap_check_amr();

	/*

	 * A syscall should always be called with interrupts enabled

	 * so we just unconditionally hard-enable here. When some kind

	 * of irq tracing is used, we additionally check that condition

	 * is correct

	 */

	if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG)) {

		WARN_ON(irq_soft_mask_return() != IRQS_ENABLED);

		WARN_ON(local_paca->irq_happened);

	}

	/*

	 * This is not required for the syscall exit path, but makes the

	 * stack frame look nicer. If this was initialised in the first stack

	 */

	regs->softe = IRQS_ENABLED;

	__hard_irq_enable();

	local_irq_enable();

	ti_flags = current_thread_info()->flags;

	if (unlikely(ti_flags & _TIF_SYSCALL_DOTRACE)) {