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Thu, 9 Jul 2026 09:23:23 +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 v4 2/2] powerpc: enable to run posix cpu timers in task context Date: Thu, 9 Jul 2026 14:51:41 +0530 Message-ID: <20260709092140.1753715-5-vishalc@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260709092140.1753715-2-vishalc@linux.ibm.com> References: <20260709092140.1753715-2-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-Authority-Analysis: v=2.4 cv=M7J97Sws c=1 sm=1 tr=0 ts=6a4f6893 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=rh6EaQSAbPCCfu5Ue3wA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA5MDA4OSBTYWx0ZWRfX9M65HO9bk9Kv QeayrZIWlipXBM7aFTqIk2Pnn8h10lmdbgwYTwb+70CxS7S3/mC9YratLVEKxKYK+nNISPxxp2M Juz3/VGkdI3lQxglVFX3NF7gpGSh8W8UroGbgtMdiJAm6B4cxO48LefseIOHZgRM5fLojT/0nBG uN/Gfodcg9JPMVMXAvenQvRUwvJ++C1ZH2cR8NF3E/br5qNNaPCB3DbmERQXXC0R3Ot4dNuF5b/ T0DduoA8SzMthjI/khl32pNcAasvcgZfIrBvAKtjl7OnUkXZz1sIhfRzktvPjj9fxp8md9SIHUy wGgWzQMsjNNs93Vss1pYfxlCiqdILW7Q3apq0pTxXGSMzvALZE3AsnEka0N+0A+DPbUUc7BaQoc jE1NtXMz/8sBzIuCXQ6JsMnG69YI5Od0Q4075ORZhR91isd0BP4Kc6VX9WJ3oa0uWBDbhoZbFzD C4k02wEBlFS0pKIatbg== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA5MDA4OSBTYWx0ZWRfX/g4j9G8pbr4T Ruj1pZuzLuhLornNrxyotlzUx0BcfGIXIv9aBcJOwV3sEIhazvxtvx6EyDA8/MpQQ6KjL0wHn1M lGVk3Y4GSfJ6CrxXTCG+tz50Ks/2bDY= X-Proofpoint-GUID: TyHz6_bMei78SoGxcoI5LkCdRo8rmwdq X-Proofpoint-ORIG-GUID: E3fzBmofM45xj8x8tuMYtUdFv-h6VKrH 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 suspectscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 adultscore=0 priorityscore=1501 bulkscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607090089 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