Messages in this thread Patch in this message | | | From | Anup Patel <> | Subject | [PATCH] RISC-V: mm: Fix set_satp_mode() for platform not having Sv57 | Date | Tue, 12 Apr 2022 09:03:35 +0530 |
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When Sv57 is not available the satp.MODE test in set_satp_mode() will fail and lead to pgdir re-programming for Sv48. The pgdir re-programming will fail as well due to pre-existing pgdir entry used for Sv57 and as a result kernel fails to boot on RISC-V platform not having Sv57.
To fix above issue, we should clear the pgdir memory in set_satp_mode() before re-programming.
Fixes: 011f09d12052 ("riscv: mm: Set sv57 on defaultly") Reported-by: Mayuresh Chitale <mchitale@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> --- arch/riscv/mm/init.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 9535bea8688c..b0793dc0c291 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -718,6 +718,7 @@ static __init void set_satp_mode(void) if (!check_l4) { disable_pgtable_l5(); check_l4 = true; + memset(early_pg_dir, 0, PAGE_SIZE); goto retry; } disable_pgtable_l4(); -- 2.25.1
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