diff options
| author | Huang Pei <huangpei@loongson.cn> | 2024-01-23 09:47:57 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 13:26:26 +0100 |
| commit | 6c292c2f902760fcd82cbf8609ca766ea89fe34e (patch) | |
| tree | bcebec22db850e0332ff053876aa0a6563a1b36d /arch/mips/kernel | |
| parent | f48a6eb2e5e88c7548a8f20f6ad8131b06427655 (diff) | |
MIPS: reserve exception vector space ONLY ONCE
[ Upstream commit abcabb9e30a1f9a69c76776f8abffc31c377b542 ]
"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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/mips/kernel')
| -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 246c6a6b0261..5b778995d448 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) |