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Tue, 17 Mar 2026 19:54:38 +0000 (GMT) From: Heiko Carstens To: Peter Zijlstra , Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Juergen Christ Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH 6/9] s390/percpu: Use new percpu code section for arch_this_cpu_[and|or]() Date: Tue, 17 Mar 2026 20:54:33 +0100 Message-ID: <20260317195436.2276810-7-hca@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260317195436.2276810-1-hca@linux.ibm.com> References: <20260317195436.2276810-1-hca@linux.ibm.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-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=MMttWcZl c=1 sm=1 tr=0 ts=69b9b183 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=4dLYTkTKlH5g-JvQF6AA:9 X-Proofpoint-ORIG-GUID: GO7A18wmWyi6hnPV3aYCTGmB12z1yBh6 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzE3MDE3NCBTYWx0ZWRfX7/za8DarR/E3 2K/X9RtEOn5hBl32zCEYFDAvSNVGE4vztVZk1Qns2SKAqk+ZFcp6JhfoGZukaOkyETtYmZAEnXV UX0PGimrxru1l1LlspW37CjxGnX9T0n6WOl94CFGHP72FrFDwzK7sf2/ONo/8qkWQkkuLArWVbs CZf4fOYbX2fhwcHp1YTmrdCPOoqxAZjd8b0Njpit/cG6KkLq79Ie3sIWACY11u+mpfxtZHP2bP1 Lj9QMXB3qMqyQR6bDlDX2YKth4HCH1C8E0VJMemIJ6e38NuB4CZQfNugtIeWQ9t1BqWVpX+b0Bb LCWCFr64f/EEQ+yV4+P7chWqNHGZ+EMGdx260rC8hVsmpO45/Jp3tTJH0zdSQvVlxW7KAUpN0e1 A2gYDfKRBiTfqOUA9NUZYyNuVTX+r7/Lw9MzJ0vP1JbravdjPBIwJfwUlhtiyN83dv4J+oO8VCp Bqd7T9syifHEmwVwG0Q== X-Proofpoint-GUID: GO7A18wmWyi6hnPV3aYCTGmB12z1yBh6 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=2026-03-17_04,2026-03-17_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 spamscore=0 priorityscore=1501 impostorscore=0 adultscore=0 phishscore=0 clxscore=1015 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603170174 Content-Type: text/plain; charset="utf-8" Convert arch_this_cpu_[and|or]() to make use of the new percpu code section infrastructure. There is no user of this_cpu_and() and only one user of this_cpu_or() within the kernel. Therefore this conversion has hardly any effect, and also removes only preempt_schedule_notrace() function call. Signed-off-by: Heiko Carstens --- arch/s390/include/asm/percpu.h | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h index 6e932f45f128..f26f03b0889c 100644 --- a/arch/s390/include/asm/percpu.h +++ b/arch/s390/include/asm/percpu.h @@ -208,17 +208,29 @@ =20 #define arch_this_cpu_to_op(pcp, val, op) \ { \ + unsigned long lc_pcpr, lc_pcpo; \ typedef typeof(pcp) pcp_op_T__; \ pcp_op_T__ val__ =3D (val); \ pcp_op_T__ old__, *ptr__; \ - preempt_disable_notrace(); \ - ptr__ =3D raw_cpu_ptr(&(pcp)); \ - asm volatile( \ - op " %[old__],%[val__],%[ptr__]" \ - : [old__] "=3Dd" (old__), [ptr__] "+Q" (*ptr__) \ - : [val__] "d" (val__) \ + \ + lc_pcpr =3D offsetof(struct lowcore, percpu_register); \ + lc_pcpo =3D offsetof(struct lowcore, percpu_offset); \ + ptr__ =3D &(pcp); \ + asm_inline volatile( \ + MVIY_PERCPU("%[disppcpr]", "%[dispaltpcpr]", "%[ptr__]")\ + AG_ALT("%[disppcpo]", "%[dispaltpcpo]", "%[ptr__]") \ + op " %[old__],%[val__],0(%[ptr__])\n" \ + MVIY_ALT("%[disppcpr]", "%[dispaltpcpr]", "%%r0") \ + : [old__] "=3D&d" (old__), \ + [ptr__] "+&a" (ptr__), "+m" (*ptr__), \ + "=3Dm" (((struct lowcore *)0)->percpu_register) \ + : [val__] "d" (val__), \ + [disppcpr] "i" (lc_pcpr), \ + [disppcpo] "i" (lc_pcpo), \ + [dispaltpcpr] "i" (lc_pcpr + LOWCORE_ALT_ADDRESS), \ + [dispaltpcpo] "i" (lc_pcpo + LOWCORE_ALT_ADDRESS), \ + "m" (((struct lowcore *)0)->percpu_offset) \ : "cc"); \ - preempt_enable_notrace(); \ } =20 #define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, "lan") --=20 2.51.0