Unverified Commit a960c132 authored Sep 05, 2020 by Pekka Enberg Committed by Palmer Dabbelt Sep 15, 2020

riscv/mm/fault: Set FAULT_FLAG_INSTRUCTION flag in do_page_fault()

If the page fault "cause" is EXC_INST_PAGE_FAULT, set the
FAULT_FLAG_INSTRUCTION flag to let handle_mm_fault() and friends know
about it. This has no functional changes because RISC-V uses the default
arch_vma_access_permitted() implementation, which always returns true.
However, dax_pmd_fault(), for example, has a tracepoint that uses
FAULT_FLAG_INSTRUCTION, so we might as well set it.

Signed-off-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

parent 2baa6d95

arch/riscv/mm/fault.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -234,7 +234,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs)

		if (cause == EXC_STORE_PAGE_FAULT)
		flags \|= FAULT_FLAG_WRITE;

		else if (cause == EXC_INST_PAGE_FAULT)
		flags \|= FAULT_FLAG_INSTRUCTION;
		retry:
		mmap_read_lock(mm);
		vma = find_vma(mm, addr);

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