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powerpc/64: Defer paca allocation until memory topology is discovered

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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Rename the dummy allocate_pacas() to fix 32-bit build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2018-02-14 01:08:19 +10:00
committed by Michael Ellerman
parent 9f593f131e
commit 59f577743d
4 changed files with 53 additions and 72 deletions
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24
arch/powerpc/kernel/setup-common.c
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@@ -577,12 +577,6 @@ void __init smp_setup_cpu_maps(void)
setup_nr_cpu_ids();
free_unused_pacas();
for_each_possible_cpu(cpu) {
if (cpu == smp_processor_id())
continue;
set_hard_smp_processor_id(cpu, cpu_to_phys_id[cpu]);
}
}
#endif /* CONFIG_SMP */
@@ -848,6 +842,23 @@ static __init void print_system_info(void)
pr_info("-----------------------------------------------------\n");
}
#ifdef CONFIG_SMP
static void smp_setup_pacas(void)
{
int cpu;
for_each_possible_cpu(cpu) {
if (cpu == smp_processor_id())
continue;
allocate_paca(cpu);
set_hard_smp_processor_id(cpu, cpu_to_phys_id[cpu]);
}
memblock_free(__pa(cpu_to_phys_id), nr_cpu_ids * sizeof(u32));
cpu_to_phys_id = NULL;
}
#endif
/*
* Called into from start_kernel this initializes memblock, which is used
* to manage page allocation until mem_init is called.
@@ -915,6 +926,7 @@ void __init setup_arch(char **cmdline_p)
* so smp_release_cpus() does nothing for them.
*/
#ifdef CONFIG_SMP
smp_setup_pacas();
smp_release_cpus();
#endif