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| author |   Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:08 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:08 +0800 |
| commit | 1299a129a9f927433ba792b242c1f287a96059e7 (patch) | |
| tree | 5701a624a1d32b1845a79c567745887bd7537329 /arch/loongarch/mm/tlb.c | |
| parent | LoongArch: Do not create sysfs control file for io master CPUs (diff) | |
| download | linux-dev-1299a129a9f927433ba792b242c1f287a96059e7.tar.xz linux-dev-1299a129a9f927433ba792b242c1f287a96059e7.zip | |
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 <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/mm/tlb.c')
| -rw-r--r-- | arch/loongarch/mm/tlb.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/loongarch/mm/tlb.c b/arch/loongarch/mm/tlb.c index 9818ce11546b..da3681f131c8 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(); } |