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| author |   Vincent Chen <vincent.chen@sifive.com> | 2020-07-10 10:40:54 +0800 |
|---|---|---|
| committer |   Palmer Dabbelt <palmerdabbelt@google.com> | 2020-07-20 21:14:51 -0700 |
| commit | 4cb699d0447be8e0906539f93cbe41e19598ee5a (patch) | |
| tree | ade72673581d45914670b209542101bdabbc2abe /arch/riscv | |
| parent | Linux 5.8-rc6 (diff) | |
| download | linux-dev-4cb699d0447be8e0906539f93cbe41e19598ee5a.tar.xz linux-dev-4cb699d0447be8e0906539f93cbe41e19598ee5a.zip | |
riscv: kasan: use local_tlb_flush_all() to avoid uninitialized __sbi_rfence
It fails to boot the v5.8-rc4 kernel with CONFIG_KASAN because kasan_init
and kasan_early_init use uninitialized __sbi_rfence as executing the
tlb_flush_all(). Actually, at this moment, only the CPU which is
responsible for the system initialization enables the MMU. Other CPUs are
parking at the .Lsecondary_start. Hence the tlb_flush_all() is able to be
replaced by local_tlb_flush_all() to avoid using uninitialized
__sbi_rfence.
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/mm/kasan_init.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 4a8b61806633..87b4ab3d3c77 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -44,7 +44,7 @@ asmlinkage void __init kasan_early_init(void) (__pa(((uintptr_t) kasan_early_shadow_pmd))), __pgprot(_PAGE_TABLE))); - flush_tlb_all(); + local_flush_tlb_all(); } static void __init populate(void *start, void *end) @@ -79,7 +79,7 @@ static void __init populate(void *start, void *end) pfn_pgd(PFN_DOWN(__pa(&pmd[offset])), __pgprot(_PAGE_TABLE))); - flush_tlb_all(); + local_flush_tlb_all(); memset(start, 0, end - start); } |