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Tue, 17 Feb 2026 05:39:09 -0800 (PST) X-Received: by 2002:a05:6a00:e84:b0:81f:3f6e:166 with SMTP id d2e1a72fcca58-824c95e4266mr12349176b3a.46.1771335549446; Tue, 17 Feb 2026 05:39:09 -0800 (PST) Received: from hu-kshaikkh-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-824c6b935c6sm14633207b3a.47.2026.02.17.05.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Feb 2026 05:39:09 -0800 (PST) From: Khaja Hussain Shaik Khaji To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com, will@kernel.org, mhiramat@kernel.org, yang@os.amperecomputing.com, dev.jain@arm.com, ada.coupriediaz@arm.com, linux-arm-msm@vger.kernel.org Subject: [PATCH v2 2/2] arm64: insn: drop NOP from steppable hint list Date: Tue, 17 Feb 2026 19:08:55 +0530 Message-Id: <20260217133855.3142192-3-khaja.khaji@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260217133855.3142192-1-khaja.khaji@oss.qualcomm.com> References: <20251106104955.2089268-1-khaja.khaji@oss.qualcomm.com> <20260217133855.3142192-1-khaja.khaji@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: CWDHRxUZ5Gh5akd-j6jUwgUsekSAPLvm X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE3MDExMCBTYWx0ZWRfXxGXtycILa7XY zZWZ5U0jxLSOIfYY8XHwapiI0xGxLJ8s6VhbRbUt5H90Pmubsbb1ETHKMlVJhM0xU8QY3tXggDo iI4QNOr23hyTG4Z0CkLrusuDRz/2VDw9RS82VXBbHlT3L9rczEYJZMWYevlBQ/FUe10PQJPwjjG lHx5V2yfY1rnKB7/1YPYK2RLeCxqLBV6emSOIwgyo3Bn73rVna4xT13IxEs/NUemVY/9jw60nUm 6/MoRzEvsJMVQWEyAc7NpA438+hKewYRw+Hd9OJlPZktNFFl3G0jNhT+w0g0XeezaMRYbICrtOO bvsAG49BFZqiSSagESYJJdXgZB2s6sDPPGJV5PaQbjnfSATIDbLbWCO9rBgqQy2LHmz0M7Bshzs XuWNE08nekeyG7GqMR9OusdfEnLE6PA6HjRAvvq3WQeb7ZozzXK4V8C5D9FS11UtIKC09w3ohTK y2Sr1h5RW4f/rj8r73w== X-Authority-Analysis: v=2.4 cv=BpuQAIX5 c=1 sm=1 tr=0 ts=69946f7f cx=c_pps a=WW5sKcV1LcKqjgzy2JUPuA==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=EUspDBNiAAAA:8 a=OUhaZ1_5ODAiWoFFvy8A:9 a=OpyuDcXvxspvyRM73sMx:22 X-Proofpoint-ORIG-GUID: CWDHRxUZ5Gh5akd-j6jUwgUsekSAPLvm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-17_01,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 adultscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602170110 Content-Type: text/plain; charset="utf-8" NOP is already handled via instruction emulation and does not require single-stepping. Drop it from aarch64_insn_is_steppable_hint(). Signed-off-by: Khaja Hussain Shaik Khaji --- arch/arm64/include/asm/insn.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index e1d30ba99d01..9429f76906e0 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -456,7 +456,6 @@ static __always_inline bool aarch64_insn_is_steppable_h= int(u32 insn) case AARCH64_INSN_HINT_BTIC: case AARCH64_INSN_HINT_BTIJ: case AARCH64_INSN_HINT_BTIJC: - case AARCH64_INSN_HINT_NOP: return true; default: return false; --=20 2.34.1