powerpc: Add kconfig for muxed smp ipi support
Compile the new smp ipi mux and demux code only if a platform will make use of it. The new config is selected as required. The new cause_ipi smp op is only available conditionally to point out configs where the select is required; this makes setting the op an immediate fail instead of a deferred unresolved symbol at link. This also creates a new config for power surge powermac upgrade support that can be disabled in expert mode but is default on. I also removed the depends / default y on CONFIG_XICS since it is selected by PSERIES. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller
Benjamin Herrenschmidt
parent
23d72bfd8f
commit
1ece355b68
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@ -38,7 +38,9 @@ extern void cpu_die(void);
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struct smp_ops_t {
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void (*message_pass)(int cpu, int msg);
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#ifdef CONFIG_PPC_SMP_MUXED_IPI
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void (*cause_ipi)(int cpu, unsigned long data);
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#endif
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int (*probe)(void);
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int (*kick_cpu)(int nr);
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void (*setup_cpu)(int nr);
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@ -178,6 +178,7 @@ int smp_request_message_ipi(int virq, int msg)
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return err;
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}
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#ifdef CONFIG_PPC_SMP_MUXED_IPI
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struct cpu_messages {
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unsigned long messages; /* current messages bits */
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unsigned long data; /* data for cause ipi */
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@ -230,6 +231,7 @@ irqreturn_t smp_ipi_demux(void)
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}
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return IRQ_HANDLED;
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}
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#endif /* CONFIG_PPC_SMP_MUXED_IPI */
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void smp_send_reschedule(int cpu)
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{
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@ -57,6 +57,14 @@ config UDBG_RTAS_CONSOLE
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depends on PPC_RTAS
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default n
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config PPC_SMP_MUXED_IPI
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bool
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help
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Select this opton if your platform supports SMP and your
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interrupt controller provides less than 4 interrupts to each
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cpu. This will enable the generic code to multiplex the 4
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messages on to one ipi.
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config PPC_UDBG_BEAT
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bool "BEAT based debug console"
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depends on PPC_CELLEB
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@ -73,6 +73,7 @@ config PPC_BOOK3S_64
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config PPC_BOOK3E_64
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bool "Embedded processors"
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select PPC_FPU # Make it a choice ?
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select PPC_SMP_MUXED_IPI
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endchoice
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@ -178,6 +179,7 @@ config FSL_BOOKE
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config PPC_FSL_BOOK3E
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bool
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select FSL_EMB_PERFMON
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select PPC_SMP_MUXED_IPI
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default y if FSL_BOOKE
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config PTE_64BIT
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@ -1,6 +1,7 @@
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config PPC_ISERIES
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bool "IBM Legacy iSeries"
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depends on PPC64 && PPC_BOOK3S
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select PPC_SMP_MUXED_IPI
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select PPC_INDIRECT_PIO
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select PPC_INDIRECT_MMIO
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select PPC_PCI_CHOICE if EXPERT
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@ -18,4 +18,13 @@ config PPC_PMAC64
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select PPC_970_NAP
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default y
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config PPC_PMAC32_PSURGE
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bool "Support for powersurge upgrade cards" if EXPERT
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depends on SMP && PPC32 && PPC_PMAC
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select PPC_SMP_MUXED_IPI
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default y
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help
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The powersurge cpu boards can be used in the generation
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of powermacs that have a socket for an upgradeable cpu card,
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including the 7500, 8500, 9500, 9600. Support exists for
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both dual and quad socket upgrade cards.
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@ -239,7 +239,7 @@ static unsigned int pmac_pic_get_irq(void)
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unsigned long bits = 0;
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unsigned long flags;
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#ifdef CONFIG_SMP
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#ifdef CONFIG_PPC_PMAC32_PSURGE
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void psurge_smp_message_recv(void);
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/* IPI's are a hack on the powersurge -- Cort */
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@ -247,7 +247,7 @@ static unsigned int pmac_pic_get_irq(void)
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psurge_smp_message_recv();
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return NO_IRQ_IGNORE; /* ignore, already handled */
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}
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#endif /* CONFIG_SMP */
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#endif /* CONFIG_PPC_PMAC32_PSURGE */
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raw_spin_lock_irqsave(&pmac_pic_lock, flags);
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for (irq = max_real_irqs; (irq -= 32) >= 0; ) {
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int i = irq >> 5;
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@ -70,7 +70,7 @@ static void (*pmac_tb_freeze)(int freeze);
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static u64 timebase;
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static int tb_req;
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#ifdef CONFIG_PPC32
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#ifdef CONFIG_PPC_PMAC32_PSURGE
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/*
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* Powersurge (old powermac SMP) support.
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@ -420,7 +420,7 @@ struct smp_ops_t psurge_smp_ops = {
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.give_timebase = smp_psurge_give_timebase,
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.take_timebase = smp_psurge_take_timebase,
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};
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#endif /* CONFIG_PPC32 - actually powersurge support */
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#endif /* CONFIG_PPC_PMAC32_PSURGE */
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/*
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* Core 99 and later support
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@ -980,7 +980,7 @@ void __init pmac_setup_smp(void)
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of_node_put(np);
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smp_ops = &core99_smp_ops;
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}
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#ifdef CONFIG_PPC32
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#ifdef CONFIG_PPC_PMAC32_PSURGE
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else {
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/* We have to set bits in cpu_possible_mask here since the
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* secondary CPU(s) aren't in the device tree. Various
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@ -993,7 +993,7 @@ void __init pmac_setup_smp(void)
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set_cpu_possible(cpu, true);
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smp_ops = &psurge_smp_ops;
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}
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#endif /* CONFIG_PPC32 */
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#endif /* CONFIG_PPC_PMAC32_PSURGE */
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#ifdef CONFIG_HOTPLUG_CPU
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ppc_md.cpu_die = pmac_cpu_die;
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@ -1,5 +1,6 @@
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config PPC_XICS
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def_bool n
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select PPC_SMP_MUXED_IPI
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config PPC_ICP_NATIVE
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def_bool n
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