diff options
| author | Anup Patel <apatel@ventanamicro.com> | 2022-04-12 09:03:35 +0530 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-04-21 15:10:39 -0700 |
| commit | d5fdade9331f57335af97dbef61cf15b4930abc1 (patch) | |
| tree | 6f679f8322ff9804b0ee55e2cc466407c2090a0a | |
| parent | f81f7861ee2aaa6f652f18e8f622547bdd379724 (diff) | |
| download | linux-d5fdade9331f57335af97dbef61cf15b4930abc1.tar.bz2 | |
RISC-V: mm: Fix set_satp_mode() for platform not having Sv57
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>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/mm/init.c | 1 |
1 files changed, 1 insertions, 0 deletions
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 @@ retry: if (!check_l4) { disable_pgtable_l5(); check_l4 = true; + memset(early_pg_dir, 0, PAGE_SIZE); goto retry; } disable_pgtable_l4(); |