Messages in this thread Patch in this message | | | From | Dylan Jhong <> | Subject | [RESEND PATCH v2] RISC-V: mm: Support huge page in vmalloc_fault() | Date | Fri, 10 Mar 2023 15:50:21 +0800 |
| |
Since RISC-V supports ioremap() with huge page (pud/pmd) mapping, However, vmalloc_fault() assumes that the vmalloc range is limited to pte mappings. To complete the vmalloc_fault() function by adding huge page support.
Fixes: 310f541a027b ("riscv: Enable HAVE_ARCH_HUGE_VMAP for 64BIT") Signed-off-by: Dylan Jhong <dylan@andestech.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
--- Changes in v2: - Fix format of commit message --- arch/riscv/mm/fault.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index eb0774d9c03b..4b9953b47d81 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -143,6 +143,8 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a no_context(regs, addr); return; } + if (pud_leaf(*pud_k)) + goto flush_tlb; /* * Since the vmalloc area is global, it is unnecessary @@ -153,6 +155,8 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a no_context(regs, addr); return; } + if (pmd_leaf(*pmd_k)) + goto flush_tlb; /* * Make sure the actual PTE exists as well to @@ -172,6 +176,7 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a * ordering constraint, not a cache flush; it is * necessary even after writing invalid entries. */ +flush_tlb: local_flush_tlb_page(addr); } -- 2.34.1
| |