Commit 11886c19 authored by Sven Schnelle's avatar Sven Schnelle Committed by Vasily Gorbik
Browse files

s390: add machine check SIGP 



This will be used with the upcoming entry.S changes to signal
that there's a machine check pending that cannot be handled in
the Machine check handler itself.

Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarSven Schnelle <svens@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent a999eb96

arch/s390/include/asm/smp.h

+1 −0
Original line number Diff line number Diff line
@@ -58,5 +58,6 @@ extern int smp_rescan_cpus(void); 
extern void __noreturn cpu_die(void);

extern void __cpu_die(unsigned int cpu);

extern int __cpu_disable(void);

extern void schedule_mcck_handler(void);



#endif /* __ASM_SMP_H */

arch/s390/kernel/smp.c

+8 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ enum { 
	ec_schedule = 0,

	ec_call_function_single,

	ec_stop_cpu,

	ec_mcck_pending,

};



enum {
@@ -403,6 +404,11 @@ int smp_find_processor_id(u16 address) 
	return -1;

}



void schedule_mcck_handler(void)

{

	pcpu_ec_call(pcpu_devices + smp_processor_id(), ec_mcck_pending);

}



bool arch_vcpu_is_preempted(int cpu)

{

	if (test_cpu_flag_of(CIF_ENABLED_WAIT, cpu))
@@ -497,6 +503,8 @@ static void smp_handle_ext_call(void) 
		scheduler_ipi();

	if (test_bit(ec_call_function_single, &bits))

		generic_smp_call_function_single_interrupt();

	if (test_bit(ec_mcck_pending, &bits))

		s390_handle_mcck();

}



static void do_ext_call_interrupt(struct ext_code ext_code,

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