diff options
| author | yang.zhang <yang.zhang@hexintek.com> | 2024-05-08 10:24:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-12 11:11:37 +0200 |
| commit | ce2e63804abf4e1f3a1a13ff09c6540f587dc711 (patch) | |
| tree | d2c2a1267f51ba2e44acb66ca608377761109a21 /arch | |
| parent | 124451bbc2d3aae70f0c54c02129312237d01871 (diff) | |
riscv: set trap vector earlier
[ Upstream commit 6ad8735994b854b23c824dd6b1dd2126e893a3b4 ]
The exception vector of the booting hart is not set before enabling
the mmu and then still points to the value of the previous firmware,
typically _start. That makes it hard to debug setup_vm() when bad
things happen. So fix that by setting the exception vector earlier.
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: yang.zhang <yang.zhang@hexintek.com>
Link: https://lore.kernel.org/r/20240508022445.6131-1-gaoshanliukou@163.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/kernel/head.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 0097c145385f..9691fa8f2faa 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -305,6 +305,9 @@ clear_bss_done: #else mv a0, a1 #endif /* CONFIG_BUILTIN_DTB */ + /* Set trap vector to spin forever to help debug */ + la a3, .Lsecondary_park + csrw CSR_TVEC, a3 call setup_vm #ifdef CONFIG_MMU la a0, early_pg_dir |