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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/s390/include/asm/smp.h
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/s390/include/asm/smp.h')
-rw-r--r--arch/s390/include/asm/smp.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
new file mode 100644
index 00000000000..c32e9123b40
--- /dev/null
+++ b/arch/s390/include/asm/smp.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright IBM Corp. 1999,2009
+ * Author(s): Denis Joseph Barrow,
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>,
+ * Heiko Carstens <heiko.carstens@de.ibm.com>,
+ */
+#ifndef __ASM_SMP_H
+#define __ASM_SMP_H
+
+#ifdef CONFIG_SMP
+
+#include <asm/system.h>
+#include <asm/sigp.h>
+
+extern void machine_restart_smp(char *);
+extern void machine_halt_smp(void);
+extern void machine_power_off_smp(void);
+
+#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
+
+extern int __cpu_disable (void);
+extern void __cpu_die (unsigned int cpu);
+extern int __cpu_up (unsigned int cpu);
+
+extern struct mutex smp_cpu_state_mutex;
+
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+
+extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
+
+extern void smp_switch_to_ipl_cpu(void (*func)(void *), void *);
+extern void smp_switch_to_cpu(void (*)(void *), void *, unsigned long sp,
+ int from, int to);
+extern void smp_restart_with_online_cpu(void);
+extern void smp_restart_cpu(void);
+
+/*
+ * returns 1 if (virtual) cpu is scheduled
+ * returns 0 otherwise
+ */
+static inline int smp_vcpu_scheduled(int cpu)
+{
+ u32 status;
+
+ switch (sigp_ps(&status, 0, cpu, sigp_sense_running)) {
+ case sigp_status_stored:
+ /* Check for running status */
+ if (status & 0x400)
+ return 0;
+ break;
+ case sigp_not_operational:
+ return 0;
+ default:
+ break;
+ }
+ return 1;
+}
+
+#else /* CONFIG_SMP */
+
+static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data)
+{
+ func(data);
+}
+
+static inline void smp_restart_with_online_cpu(void)
+{
+}
+
+#define smp_vcpu_scheduled (1)
+
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_HOTPLUG_CPU
+extern int smp_rescan_cpus(void);
+extern void __noreturn cpu_die(void);
+#else
+static inline int smp_rescan_cpus(void) { return 0; }
+static inline void cpu_die(void) { }
+#endif
+
+#endif /* __ASM_SMP_H */