arm64: insn: Add BIT(23) to {load,store}_ex's mask

JIRA: https://issues.redhat.com/browse/RHEL-78202

commit ab327cc
Author: Peilin Ye <yepeilin@google.com>
Date:   Tue Mar 4 01:06:19 2025 +0000

    arm64: insn: Add BIT(23) to {load,store}_ex's mask

    We are planning to add load-acquire (LDAR{,B,H}) and store-release
    (STLR{,B,H}) instructions to insn.{c,h}; add BIT(23) to mask of load_ex
    and store_ex to prevent aarch64_insn_is_{load,store}_ex() from returning
    false-positives for load-acquire and store-release instructions.

    Reference: Arm Architecture Reference Manual (ARM DDI 0487K.a,
               ID032224),

      * C6.2.228 LDXR
      * C6.2.165 LDAXR
      * C6.2.161 LDAR
      * C6.2.393 STXR
      * C6.2.360 STLXR
      * C6.2.353 STLR

    Acked-by: Xu Kuohai <xukuohai@huawei.com>
    Signed-off-by: Peilin Ye <yepeilin@google.com>
    Link: https://lore.kernel.org/r/5a4d2a52b2cc022bf86d0b572789f0b3bc3d5162.1741049567.git.yepeilin@google.com
    Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Signed-off-by: Gregory Bell <grbell@redhat.com>

Author: Gbell26

arch/arm64/include/asm/insn.h

@@ -351,8 +351,8 @@ __AARCH64_INSN_FUNCS(ldr_imm,	0x3FC00000, 0x39400000)
 __AARCH64_INSN_FUNCS(ldr_lit,	0xBF000000, 0x18000000)
 __AARCH64_INSN_FUNCS(ldrsw_lit,	0xFF000000, 0x98000000)
 __AARCH64_INSN_FUNCS(exclusive,	0x3F800000, 0x08000000)
-__AARCH64_INSN_FUNCS(load_ex,	0x3F400000, 0x08400000)
-__AARCH64_INSN_FUNCS(store_ex,	0x3F400000, 0x08000000)
+__AARCH64_INSN_FUNCS(load_ex,	0x3FC00000, 0x08400000)
+__AARCH64_INSN_FUNCS(store_ex,	0x3FC00000, 0x08000000)
 __AARCH64_INSN_FUNCS(mops,	0x3B200C00, 0x19000400)
 __AARCH64_INSN_FUNCS(stp,	0x7FC00000, 0x29000000)
 __AARCH64_INSN_FUNCS(ldp,	0x7FC00000, 0x29400000)