diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2024-07-16 09:26:15 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2024-07-23 16:02:31 +0200 |
| commit | d3604ffba1521f59f312be3f19999084dddef446 (patch) | |
| tree | a99f3f5e6dc0f82eaadd62f90c3704f8beca5c32 /arch/s390/kernel/smp.c | |
| parent | 90fc5ac28235843b1d5070c5dac9b01e7d39b24c (diff) | |
s390: Move CIF flags to struct pcpu
To allow testing flags for offline CPUs, move the CIF flags
to struct pcpu. To avoid having to calculate the array index
for each access, add a pointer to the pcpu member for the current
cpu to lowcore.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index b36b089b9a26..fbba37ec53cf 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -74,16 +74,8 @@ enum { CPU_STATE_CONFIGURED, }; -struct pcpu { - unsigned long ec_mask; /* bit mask for ec_xxx functions */ - unsigned long ec_clk; /* sigp timestamp for ec_xxx */ - signed char state; /* physical cpu state */ - signed char polarization; /* physical polarization */ - u16 address; /* physical cpu address */ -}; - static u8 boot_core_type; -static DEFINE_PER_CPU(struct pcpu, pcpu_devices); +DEFINE_PER_CPU(struct pcpu, pcpu_devices); /* * Pointer to the pcpu area of the boot CPU. This is required when a restart * interrupt is triggered on an offline CPU. For that case accessing percpu @@ -264,6 +256,7 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) cpumask_set_cpu(cpu, &init_mm.context.cpu_attach_mask); cpumask_set_cpu(cpu, mm_cpumask(&init_mm)); lc->cpu_nr = cpu; + lc->pcpu = (unsigned long)pcpu; lc->restart_flags = RESTART_FLAG_CTLREGS; lc->spinlock_lockval = arch_spin_lockval(cpu); lc->spinlock_index = 0; @@ -924,6 +917,7 @@ void __cpu_die(unsigned int cpu) pcpu_free_lowcore(pcpu, cpu); cpumask_clear_cpu(cpu, mm_cpumask(&init_mm)); cpumask_clear_cpu(cpu, &init_mm.context.cpu_attach_mask); + pcpu->flags = 0; } void __noreturn cpu_die(void) @@ -959,10 +953,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus) void __init smp_prepare_boot_cpu(void) { + struct lowcore *lc = get_lowcore(); + WARN_ON(!cpu_present(0) || !cpu_online(0)); + lc->percpu_offset = __per_cpu_offset[0]; ipl_pcpu = per_cpu_ptr(&pcpu_devices, 0); ipl_pcpu->state = CPU_STATE_CONFIGURED; - get_lowcore()->percpu_offset = __per_cpu_offset[0]; + lc->pcpu = (unsigned long)ipl_pcpu; smp_cpu_set_polarization(0, POLARIZATION_UNKNOWN); } |