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[PATCH] powerpc: Allow non zero boot cpuids

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We currently have a hack to flip the boot cpu and its secondary thread
to logical cpuid 0 and 1. This means the logical - physical mapping will
differ depending on which cpu is boot cpu. This is most apparent on
kexec, where we might kexec on any cpu and therefore change the mapping
from boot to boot.

The patch below does a first pass early on to work out the logical cpuid
of the boot thread. We then fix up some paca structures to match.

Ive also removed the boot_cpuid_phys variable for ppc64, to be
consistent we use get_hard_smp_processor_id(boot_cpuid) everywhere.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard
2006-03-25 17:25:17 +11:00
committed by Paul Mackerras
parent b4f382a3e5
commit 4df20460a3
8 changed files with 88 additions and 80 deletions
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21
arch/powerpc/kernel/paca.c
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@@ -56,14 +56,11 @@ struct lppaca lppaca[] = {
* processors. The processor VPD array needs one entry per physical
* processor (not thread).
*/
#define PACA_INIT_COMMON(number, start, asrr, asrv) \
#define PACA_INIT_COMMON(number) \
.lppaca_ptr = &lppaca[number], \
.lock_token = 0x8000, \
.paca_index = (number), /* Paca Index */ \
.kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \
.stab_real = (asrr), /* Real pointer to segment table */ \
.stab_addr = (asrv), /* Virt pointer to segment table */ \
.cpu_start = (start), /* Processor start */ \
.hw_cpu_id = 0xffff,
#ifdef CONFIG_PPC_ISERIES
@@ -72,30 +69,20 @@ struct lppaca lppaca[] = {
#define PACA_INIT(number) \
{ \
PACA_INIT_COMMON(number, 0, 0, 0) \
PACA_INIT_ISERIES(number) \
}
#define BOOTCPU_PACA_INIT(number) \
{ \
PACA_INIT_COMMON(number, 1, 0, (u64)&initial_stab) \
PACA_INIT_COMMON(number) \
PACA_INIT_ISERIES(number) \
}
#else
#define PACA_INIT(number) \
{ \
PACA_INIT_COMMON(number, 0, 0, 0) \
PACA_INIT_COMMON(number) \
}
#define BOOTCPU_PACA_INIT(number) \
{ \
PACA_INIT_COMMON(number, 1, STAB0_PHYS_ADDR, (u64)&initial_stab) \
}
#endif
struct paca_struct paca[] = {
BOOTCPU_PACA_INIT(0),
PACA_INIT(0),
#if NR_CPUS > 1
PACA_INIT( 1), PACA_INIT( 2), PACA_INIT( 3),
#if NR_CPUS > 4