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| author | Liu Shaohua <liush@allwinnertech.com> | 2020-10-26 20:26:54 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-11-05 21:13:44 -0800 |
| commit | bcacf5f6f239a9e60287680514f392748cb4ec39 (patch) | |
| tree | 5b02d2cc5320929cf04dd414e8f82475ce0d8bbe /arch/riscv | |
| parent | 79605f1394261995c2b955c906a5a20fb27cdc84 (diff) | |
| download | linux-bcacf5f6f239a9e60287680514f392748cb4ec39.tar.gz linux-bcacf5f6f239a9e60287680514f392748cb4ec39.tar.bz2 linux-bcacf5f6f239a9e60287680514f392748cb4ec39.zip | |
riscv: fix pfn_to_virt err in do_page_fault().
The argument to pfn_to_virt() should be pfn not the value of CSR_SATP.
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: liush <liush@allwinnertech.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/mm/fault.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 1359e21c0c62..3c8b9e433c67 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -86,6 +86,7 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a pmd_t *pmd, *pmd_k; pte_t *pte_k; int index; + unsigned long pfn; /* User mode accesses just cause a SIGSEGV */ if (user_mode(regs)) @@ -100,7 +101,8 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a * of a task switch. */ index = pgd_index(addr); - pgd = (pgd_t *)pfn_to_virt(csr_read(CSR_SATP)) + index; + pfn = csr_read(CSR_SATP) & SATP_PPN; + pgd = (pgd_t *)pfn_to_virt(pfn) + index; pgd_k = init_mm.pgd + index; if (!pgd_present(*pgd_k)) { |