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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2023-06-29 14:58:44 +0200 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-06-29 14:58:44 +0200 |
| commit | b82fad4d5deb2c2a15fdb581a1e6725dcea666e7 (patch) | |
| tree | 6164aec71b77cf5e8bd2be1c3d6f4f48cec09a48 /arch/loongarch | |
| parent | LoongArch: Move three functions from kprobes.c to inst.c (diff) | |
| download | linux-b82fad4d5deb2c2a15fdb581a1e6725dcea666e7.tar.xz linux-b82fad4d5deb2c2a15fdb581a1e6725dcea666e7.zip | |
LoongArch: Check for AMO instructions in insns_not_supported()
Like llsc instructions, the atomic memory access instructions shouldn't
be supported for probing, so check for them in insns_not_supported().
Closes: https://lore.kernel.org/all/SY4P282MB351877A70A0333C790FE85A5C09C9@SY4P282MB3518.AUSP282.PROD.OUTLOOK.COM/
Tested-by: Jeff Xie <xiehuan09@gmail.com>
Reported-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/include/asm/inst.h | 26 | ||||
| -rw-r--r-- | arch/loongarch/kernel/inst.c | 6 |
2 files changed, 32 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index 985760e64f04..a8b88a09a1b0 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -187,6 +187,32 @@ enum reg3_op { amord_op = 0x70c7, amxorw_op = 0x70c8, amxord_op = 0x70c9, + ammaxw_op = 0x70ca, + ammaxd_op = 0x70cb, + amminw_op = 0x70cc, + ammind_op = 0x70cd, + ammaxwu_op = 0x70ce, + ammaxdu_op = 0x70cf, + amminwu_op = 0x70d0, + ammindu_op = 0x70d1, + amswapdbw_op = 0x70d2, + amswapdbd_op = 0x70d3, + amadddbw_op = 0x70d4, + amadddbd_op = 0x70d5, + amanddbw_op = 0x70d6, + amanddbd_op = 0x70d7, + amordbw_op = 0x70d8, + amordbd_op = 0x70d9, + amxordbw_op = 0x70da, + amxordbd_op = 0x70db, + ammaxdbw_op = 0x70dc, + ammaxdbd_op = 0x70dd, + ammindbw_op = 0x70de, + ammindbd_op = 0x70df, + ammaxdbwu_op = 0x70e0, + ammaxdbdu_op = 0x70e1, + ammindbwu_op = 0x70e2, + ammindbdu_op = 0x70e3, fldgts_op = 0x70e8, fldgtd_op = 0x70e9, fldles_op = 0x70ea, diff --git a/arch/loongarch/kernel/inst.c b/arch/loongarch/kernel/inst.c index 18e197515d7f..a3169cf1cc31 100644 --- a/arch/loongarch/kernel/inst.c +++ b/arch/loongarch/kernel/inst.c @@ -135,6 +135,12 @@ void simu_branch(struct pt_regs *regs, union loongarch_instruction insn) bool insns_not_supported(union loongarch_instruction insn) { + switch (insn.reg3_format.opcode) { + case amswapw_op ... ammindbdu_op: + pr_notice("atomic memory access instructions are not supported\n"); + return true; + } + switch (insn.reg2i14_format.opcode) { case llw_op: case lld_op: |