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Fri, 17 Jul 2026 12:44:00 +0000 (GMT) Received: from osiris (unknown [9.87.159.133]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 17 Jul 2026 12:44:00 +0000 (GMT) Date: Fri, 17 Jul 2026 14:43:59 +0200 From: Steffen Eiden To: Fuad Tabba Cc: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Vincent Donnefort , Quentin Perret , Sebastian Ene , Hyunwoo Kim , Fuad Tabba Subject: Re: [PATCH v6 3/8] KVM: arm64: Factor out reusable vCPU reset helpers Message-ID: <20260717124359.319936-B-seiden@linux.ibm.com> References: <20260715081238.1891918-1-fuad.tabba@linux.dev> <20260715081238.1891918-4-fuad.tabba@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260715081238.1891918-4-fuad.tabba@linux.dev> X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=fOcJG5ae c=1 sm=1 tr=0 ts=6a5a2394 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=1XWaLZrsAAAA:8 a=9jmm95dLNYizn0WUGbMA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE3MDEyOSBTYWx0ZWRfX42+OWfiGSYcu 2AIsK+wqk6Pu+8v4/XGlNIOqhLGHziw3ozwp8jOFE313yIxf8zdA7dEa8foau5VvD7gy+Ea+NPW f3gBHLZyiwZjy9xIQq+w86BHb3BIj443w6qft6G01suJfn4p29WiuZAp4rIyeZVfp+Vl28E4WhT h7LMlSggLpDjvj60WWy40nAkEdnoJJA9755S5Ovw0+F0qeYiqNJAEH9eVIax536CbSZ5reGy7Ad CYvXRLZ8aySTXiH1iK4Y58b7BjK8E6NXFalURv+t25/OWT+IWuRALjrnsBcvYf8BFhtB5cb1VxA H/NWldFof/qz+I/t5+1GsD1UH0lcOd5npyXgVGmpnrYHzbZjAhfe+HTQSMlmef+8bRiUyZrxCto RsW6EgIqKoyRo78fzDAiatglD0MjykstldIv19w5fcAUScNrZXku64kdtyT+m7FMciLl86TILfi WZoUlRqRMOLNhgEkQew== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE3MDEyOSBTYWx0ZWRfX8a9XsghjmHVe /p3/ZRjHA6aRtYHm1I9uBG+qTFAXi2u4wLuTATv0pdb+PgAuVyqcY924j/fb0t+Z+Vhte5t9UHT wDbuO+Ae0JHOWvOrp6Tt6Uc/hB1m5mg= X-Proofpoint-GUID: AAio97567cpyKve32dZnzaYQ0va_67NX X-Proofpoint-ORIG-GUID: d6stTD7YvT3wK5FeKvDrUou5uCOAnElc 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=2026-07-17_03,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 impostorscore=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1011 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607170129 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260717_054419_259023_78F5F8BC X-CRM114-Status: GOOD ( 13.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jul 15, 2026 at 09:12:33AM +0100, Fuad Tabba wrote: > Pull the reusable pieces out of kvm_reset_vcpu(): expose the reset > PSTATE values in kvm_arm.h, and split the core register reset and the > PSCI-driven reset into kvm_reset_vcpu_core() and kvm_reset_vcpu_psci(). > A follow-up series reuses these to reset protected vCPUs at EL2. > > No functional change intended. > > Reviewed-by: Vincent Donnefort > Signed-off-by: Fuad Tabba That looks good. There is another usecase for this. I did a very similar thing in [1] to reuse the reset functionality for arm64 on s390. I just did not the move the code to a different file. FWIW: Reviewed-by: Steffen Eiden [1] https://lore.kernel.org/all/20260706085229.979525-11-seiden@linux.ibm.com/ Steffen