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powerpc/setup: Add cpu_to_phys_id array

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Build an array that finds hardware CPU number from logical CPU
number in firmware CPU discovery. Use that rather than setting
paca of other CPUs directly, to begin with. Subsequent patch will
not have pacas allocated at this point.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fix SMP=n build by adding #ifdef in arch_match_cpu_phys_id()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2018-02-14 01:08:18 +10:00
committed by Michael Ellerman
parent c0abd0c745
commit 9f593f131e
3 changed files with 25 additions and 1 deletions
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1
arch/powerpc/include/asm/smp.h
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@@ -31,6 +31,7 @@
extern int boot_cpuid;
extern int spinning_secondaries;
extern u32 *cpu_to_phys_id;
extern void cpu_die(void);
extern int cpu_to_chip_id(int cpu);