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MIPS: reserve exception vector space ONLY ONCE

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"cpu_probe" is called both by BP and APs, but reserving exception vector
(like 0x0-0x1000) called by "cpu_probe" need once and calling on APs is
too late since memblock is unavailable at that time.

So, reserve exception vector ONLY by BP.

Suggested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Huang Pei 2024-01-23 09:47:57 +08:00 committed by Thomas Bogendoerfer
parent dd3c33ccbb
commit abcabb9e30
1 changed files with 7 additions and 1 deletions
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8
arch/mips/kernel/traps.c
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@ -2007,7 +2007,13 @@ unsigned long vi_handlers[64];
void reserve_exception_space(phys_addr_t addr, unsigned long size)
{
memblock_reserve(addr, size);
/*
* reserve exception space on CPUs other than CPU0
* is too late, since memblock is unavailable when APs
* up
*/
if (smp_processor_id() == 0)
memblock_reserve(addr, size);
}
void __init *set_except_vector(int n, void *addr)