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| author | Zihao Yu <yuzihao@ict.ac.cn> | 2021-03-17 09:17:25 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-04-02 06:37:05 +0200 |
| commit | ac8d0b901f0033b783156ab2dc1a0e73ec42409b (patch) | |
| tree | c30bba6025078108ef26dadf653ac8083b0941af /arch/riscv/kernel/entry.S | |
| parent | riscv: evaluate put_user() arg before enabling user access (diff) | |
| download | linux-ac8d0b901f0033b783156ab2dc1a0e73ec42409b.tar.xz linux-ac8d0b901f0033b783156ab2dc1a0e73ec42409b.zip | |
riscv,entry: fix misaligned base for excp_vect_table
In RV64, the size of each entry in excp_vect_table is 8 bytes. If the
base of the table is not 8-byte aligned, loading an entry in the table
will raise a misaligned exception. Although such exception will be
handled by opensbi/bbl, this still causes performance degradation.
Signed-off-by: Zihao Yu <yuzihao@ict.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/entry.S')
| -rw-r--r-- | arch/riscv/kernel/entry.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 744f3209c48d..76274a4a1d8e 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -447,6 +447,7 @@ ENDPROC(__switch_to) #endif .section ".rodata" + .align LGREG /* Exception vector table */ ENTRY(excp_vect_table) RISCV_PTR do_trap_insn_misaligned |