diff options
| author | Greentime Hu <[email protected]> | 2019-12-19 14:44:59 +0800 |
|---|---|---|
| committer | Paul Walmsley <[email protected]> | 2019-12-20 03:32:24 -0800 |
| commit | d411cf02ed0260dacc4b2fd61dd5040fc2aa97e7 (patch) | |
| tree | d98782836429105d82651dcf854cbb42799a1132 | |
| parent | 0312a3d4b43c0045869379affc0e228e36411c78 (diff) | |
riscv: fix scratch register clearing in M-mode.
This patch fixes that the sscratch register clearing in M-mode. It cleared
sscratch register in M-mode, but it should clear mscratch register. That will
cause kernel trap if the CPU core doesn't support S-mode when trying to access
sscratch.
Fixes: 9e80635619b5 ("riscv: clear the instruction cache and all registers when booting")
Signed-off-by: Greentime Hu <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Paul Walmsley <[email protected]>
| -rw-r--r-- | arch/riscv/kernel/head.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 84a6f0a4b120..797802c73dee 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -246,7 +246,7 @@ ENTRY(reset_regs) li t4, 0 li t5, 0 li t6, 0 - csrw sscratch, 0 + csrw CSR_SCRATCH, 0 #ifdef CONFIG_FPU csrr t0, CSR_MISA |