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Thu, 9 Jul 2026 06:32:58 +0000 (GMT) From: Vishal Chourasia To: maddy@linux.ibm.com Cc: peterz@infradead.org, frederic@kernel.org, npiggin@gmail.com, mpe@ellerman.id.au, chleroy@kernel.org, sshegde@linux.ibm.com, amachhiw@linux.ibm.com, vaibhav@linux.ibm.com, harshpb@linux.ibm.com, gautam@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Vishal Chourasia Subject: [PATCH v3 2/2] powerpc: enable to run posix cpu timers in task context Date: Thu, 9 Jul 2026 11:59:42 +0530 Message-ID: <20260709062940.1679427-6-vishalc@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260709062940.1679427-2-vishalc@linux.ibm.com> References: <20260709062940.1679427-2-vishalc@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA5MDA1NyBTYWx0ZWRfX6/pcE0+XHUDp RKbkdGKB4FHI4WW9mX+I9netXDaqlheSU5yLHM7aeXnlwgKunbEW5FS4O16r5YIx/vGL2TrZStY TTetPjzP3xMO9ppr0PwEnWewEjOMQnQ= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA5MDA1NyBTYWx0ZWRfX4JQMFtcNs+Hz QzJ0l85vOqQj9/1608slUzf/r+/oWOv5eqjYpVqQqlTaI1XIV2dqSuYkgBi2sqCOWCDK6Eg99r1 XL6AIk3PLvfgiRGe1Y2xRwqQYZguJM6cKuEwoQ18aEK0z9xrUw2VXjvoeRy6rgsjTN1h3dFsKx7 ClBkPluK95B5wocuRLtTzTt7oVzkBIrMcRWZ9lechNGdzqX+9OyJPEYHXlnmd8T9RB41wb9Hdf+ zi7NQO35KjQtCwMe5sbft+jZ3aRintLusnNHBLpMxNQu1lzF8RJn5EpmTaFwH75QurnAFBfEYMa xj1HqxUSfUM3ksE6OD8gR3LWxISqZM/A8EMlFqqlvD1nQVbfEaqZsoz8J+IYhE213iK14tKp7QL C9eRuIHyKKayFTP3G/s+t+PRkuVkPte3e4JpN+JnyxXUxVIJ2QAtBN90vt/CKF1HJ+x7g+Hp7VN ugtBs4Jke6O/YAaY/RQ== X-Proofpoint-GUID: yEIgEwfQtYazhRWS5Z5rWyY5OXhjMPHs X-Authority-Analysis: v=2.4 cv=Oot/DS/t c=1 sm=1 tr=0 ts=6a4f40a3 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=7mPU114Ar3IJ09b1OIsA:9 X-Proofpoint-ORIG-GUID: DUoshtoKsdss-swwmIVeHa4UdgpkqwAZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-09_01,2026-07-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 phishscore=0 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607090057 From: Shrikanth Hegde From: Shrikanth Hegde Now that all kvm entry to guest paths handle the task work using the generic framework, enable HAVE_POSIX_CPU_TIMERS_TASK_WORK which allows running posix cpu timers in task context instead of running them in hardirq. This would is a necessary step towards enabling PREEMPT_RT on powerNV systems. Signed-off-by: Shrikanth Hegde Signed-off-by: Vishal Chourasia --- arch/powerpc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index f7ce5fff81f0..51555a0b1a26 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -281,6 +281,7 @@ config PPC select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP select HAVE_PREEMPT_DYNAMIC_KEY + select HAVE_POSIX_CPU_TIMERS_TASK_WORK select HAVE_RETHOOK if KPROBES select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RELIABLE_STACKTRACE -- 2.54.0