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authorAnup Patel <apatel@ventanamicro.com>2022-04-12 09:03:35 +0530
committerPalmer Dabbelt <palmer@rivosinc.com>2022-04-21 15:10:39 -0700
commitd5fdade9331f57335af97dbef61cf15b4930abc1 (patch)
tree6f679f8322ff9804b0ee55e2cc466407c2090a0a /arch/riscv
parentf81f7861ee2aaa6f652f18e8f622547bdd379724 (diff)
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>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/mm/init.c1
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();