From abcabb9e30a1f9a69c76776f8abffc31c377b542 Mon Sep 17 00:00:00 2001 From: Huang Pei Date: Tue, 23 Jan 2024 09:47:57 +0800 Subject: 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 Signed-off-by: Huang Pei Signed-off-by: Thomas Bogendoerfer --- arch/mips/kernel/traps.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'arch') 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) -- cgit v1.2.3-58-ga151