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| author | Huang Pei <huangpei@loongson.cn> | 2024-01-23 09:47:57 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2024-01-26 10:33:34 +0100 |
| commit | abcabb9e30a1f9a69c76776f8abffc31c377b542 (patch) | |
| tree | e6d713167c96ff9a1a75c302f4e5a0518deb38ca /arch | |
| parent | dd3c33ccbb8f0dc6a256dc55e7607569aea69721 (diff) | |
| download | lwn-abcabb9e30a1f9a69c76776f8abffc31c377b542.tar.gz lwn-abcabb9e30a1f9a69c76776f8abffc31c377b542.zip | |
MIPS: reserve exception vector space ONLY ONCE
"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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/traps.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index dec6878b35f6..a1c1cb5de913 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -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) |