Messages in this thread Patch in this message | | | From | Vineet Gupta <> | Subject | [PATCH] riscv: mm: don't advertise 1 num_asid for 0 asid bits | Date | Tue, 7 Sep 2021 13:02:54 -0700 |
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Even if mmu doesn't support ASID, current code calculates @num_asids=1 which is misleading, so avoid setting any asid related variables in such a case.
Also while here, print the number of asid bits discovered even for the disabled case.
Verified this on Hifive Unmatched.
Signed-off-by: Vineet Gupta <vgupta@kernel.org> --- arch/riscv/mm/context.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/riscv/mm/context.c b/arch/riscv/mm/context.c index ee3459cb6750..c8c6f8831a3b 100644 --- a/arch/riscv/mm/context.c +++ b/arch/riscv/mm/context.c @@ -233,8 +233,10 @@ static int __init asids_init(void) local_flush_tlb_all(); /* Pre-compute ASID details */ - num_asids = 1 << asid_bits; - asid_mask = num_asids - 1; + if (asid_bits) { + num_asids = 1 << asid_bits; + asid_mask = num_asids - 1; + } /* * Use ASID allocator only if number of HW ASIDs are @@ -255,7 +257,7 @@ static int __init asids_init(void) pr_info("ASID allocator using %lu bits (%lu entries)\n", asid_bits, num_asids); } else { - pr_info("ASID allocator disabled\n"); + pr_info("ASID allocator disabled: %lu bits\n", asid_bits); } return 0; -- 2.30.2
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