From 1299a129a9f927433ba792b242c1f287a96059e7 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Wed, 12 Oct 2022 16:36:08 +0800 Subject: [PATCH] LoongArch: Flush TLB earlier at initialization Move local_flush_tlb_all() earlier (just after setup_ptwalker() and before page allocation). This can avoid stale TLB entries misguiding the later page allocation. Without this patch the second kernel of kexec/kdump fails to boot SMP. BTW, move output_pgtable_bits_defines() into tlb_init() since it has nothing to do with tlb handler setup. Signed-off-by: Huacai Chen --- arch/loongarch/mm/tlb.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/mm/tlb.c b/arch/loongarch/mm/tlb.c index 9818ce1..da3681f 100644 --- a/arch/loongarch/mm/tlb.c +++ b/arch/loongarch/mm/tlb.c @@ -258,7 +258,7 @@ extern long exception_handlers[VECSIZE * 128 / sizeof(long)]; void setup_tlb_handler(int cpu) { setup_ptwalker(); - output_pgtable_bits_defines(); + local_flush_tlb_all(); /* The tlb handlers are generated only once */ if (cpu == 0) { @@ -301,6 +301,7 @@ void tlb_init(int cpu) write_csr_pagesize(PS_DEFAULT_SIZE); write_csr_stlbpgsize(PS_DEFAULT_SIZE); write_csr_tlbrefill_pagesize(PS_DEFAULT_SIZE); + setup_tlb_handler(cpu); - local_flush_tlb_all(); + output_pgtable_bits_defines(); } -- 2.7.4