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RISC-V: mm: Support huge page in vmalloc_fault()

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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: 310f541a02 ("riscv: Enable HAVE_ARCH_HUGE_VMAP for 64BIT")
Cc: stable@vger.kernel.org
Signed-off-by: Dylan Jhong <dylan@andestech.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230310075021.3919290-1-dylan@andestech.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Dylan Jhong 2023-03-10 15:50:21 +08:00 committed by Palmer Dabbelt
parent 9b7fef255c
commit 47dd902aae
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1 changed files with 5 additions and 0 deletions
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5
arch/riscv/mm/fault.c
View file

@ -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);
}