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Fri, 13 Mar 2026 10:10:24 +0000 (GMT) Date: Fri, 13 Mar 2026 11:10:22 +0100 From: Heiko Carstens To: Jinjie Ruan Cc: catalin.marinas@arm.com, will@kernel.org, oleg@redhat.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, arnd@arndb.de, shuah@kernel.org, kees@kernel.org, luto@amacapital.net, wad@chromium.org, kevin.brodsky@arm.com, charlie@rivosinc.com, macro@orcam.me.uk, deller@gmx.de, ldv@strace.io, anshuman.khandual@arm.com, song@kernel.org, ryan.roberts@arm.com, mark.rutland@arm.com, ada.coupriediaz@arm.com, broonie@kernel.org, pengcan@kylinos.cn, liqiang01@kylinos.cn, thuth@redhat.com, andreas@gaisler.com, schuster.simon@siemens-energy.com, jremus@linux.ibm.com, jgross@suse.com, mathieu.desnoyers@efficios.com, yeoreum.yun@arm.com, kmal@cock.li, dvyukov@google.com, akpm@linux-foundation.org, reddybalavignesh9979@gmail.com, richard.weiyang@gmail.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v13 11/12] arm64: Use generic TIF bits for common thread flags Message-ID: <20260313101022.13729C56-hca@linux.ibm.com> References: <20260313094738.3985794-1-ruanjinjie@huawei.com> <20260313094738.3985794-12-ruanjinjie@huawei.com> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260313094738.3985794-12-ruanjinjie@huawei.com> X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: BCADzvpbkvwpu6qt2LtTmNdZt-NTgdEB X-Authority-Analysis: v=2.4 cv=E6/AZKdl c=1 sm=1 tr=0 ts=69b3e299 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=i0EeH86SAAAA:8 a=VnNF1IyMAAAA:8 a=yb_icw7U1PEggasoSeYA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzEzMDA3OCBTYWx0ZWRfX204njEZ7La+7 lopLeqJAvBsdIgcWc7JF7JKlYJi59Je0zliAQV0GcuRR3gN8/wyQtSb5D/ATDtU4sWZjTKpvV/l AcZwh/tIq2vjmMDaZTwOouNhNy9OmALovQnv4y/8OVc1k10fK7hCIWjW71P46WpjhsNMvxnoJX8 ELxU/zlYAj8DS3iG5RHANoiskwvgvoNssJ4Zj2rUgNy64CX7p26+epoqWE7fBG/jpSSPXrNkvE8 N0LPr9ll7usEul4bSWf48Mko9DwYOBWC2IDjO6WjkJfnM28Dk2cKDO9UE8iC42p2RfBae+FZt88 6fbwgNuzR84w8Qig2mu4VEY+10CxhBs4B+MJoPOm9wRbPIl6f6lSoJP8qpvKfmEKOhebB6UI/Za BnTSAx5nmkxfhFIeEF605P9Wn/XMUWyROrvIxXzdbXmodCskURFIexm+D3qtOVKFbs/laAiG614 18vCvat/UhZ9R8rwL4g== X-Proofpoint-ORIG-GUID: jxPi3LKPbFj4QvC6Ms7r0r-sH3yGugOe X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-13_02,2026-03-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 clxscore=1011 malwarescore=0 phishscore=0 suspectscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603130078 On Fri, Mar 13, 2026 at 05:47:37PM +0800, Jinjie Ruan wrote: > Use the generic TIF bits defined in for > standard thread flags (TIF_SIGPENDING, TIF_NEED_RESCHED, TIF_NOTIFY_RESUME, > TIF_RESTORE_SIGMASK, TIF_SINGLESTEP, etc.) instead of defining > them locally. > > Arm64-specific bits (TIF_FOREIGN_FPSTATE, TIF_MTE_ASYNC_FAULT, TIF_SVE, > TIF_SSBD, etc.) are renumbered to start at bit 16 to avoid conflicts. > > This enables RSEQ optimizations which require CONFIG_HAVE_GENERIC_TIF_BITS > combined with the generic entry infrastructure (already used by arm64). > > Signed-off-by: Jinjie Ruan > --- > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/thread_info.h | 62 ++++++++++++--------------- > arch/s390/include/asm/thread_info.h | 7 ++- Acked-by: Heiko Carstens # s390 > arch/x86/include/asm/thread_info.h | 6 +-- > include/asm-generic/thread_info_tif.h | 5 +++ > 5 files changed, 38 insertions(+), 43 deletions(-) FWIW, I guess you want to do the same for loongarch was well?