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Mon, 28 Sep 2026 14:23:00 +0000 (GMT) Received: from osiris (unknown [9.87.129.112]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Mon, 28 Sep 2026 14:23:00 +0000 (GMT) Date: Mon, 28 Sep 2026 16:22:58 +0200 From: Steffen Eiden To: Hendrik Brueckner Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Alexander Gordeev , Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Christian Borntraeger , Claudio Imbrenda , David Hildenbrand , Friedrich Welter , Fuad Tabba , Gautam Gala , Hariharan Mari , Heiko Carstens , Ilya Leoshkevich , Janosch Frank , Joey Gouly , Marc Zyngier , Nico Boehr , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Suzuki K Poulose , Sven Schnelle , Ulrich Weigand , Vasily Gorbik , Will Deacon , Zenghui Yu Subject: Re: [PATCH v8 23/29] KVM: s390: Add basic arm64 kvm module Message-ID: <20260928142258.53077-B-seiden@linux.ibm.com> References: <20260918133107.1042730-1-seiden@linux.ibm.com> <20260918133107.1042730-24-seiden@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@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: X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI4MDA1NiBTYWx0ZWRfX5dsVumWdYdWF AZKYtE84fjB98wl/6dKGXlvs+Ly0IWzRCQtvVYltXc1mz74v1LhjwW6iWDIHvD2yRLVeoi+m7Mu yIk64PRIjmPyPlIfSdGB+VOWLJva8y4= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI4MDA1NiBTYWx0ZWRfX1BAFPlgJV6Nv OXuy0WD/1RHa0kE+XIyTFbFO0IriHeyB0GcbFKbrEk8jdJ0wmFsNwH5qPRXpsYgmjbSg+5w0LIQ tcxLO+zEOA+xHAAbg1KOw+eY5rjOUvN8sHC7rD5TEMrFcGeULBy1iIklCpZ/dkV+M+UzrPLQ9+E cnBqCflGGYWtjXzUZWTWpeVt6yiq+hbX/zgc1c2pgY0eUKYVn2vsJAFhZkrVqmaYBEmwCa+Nq5+ jOrXaFxPCoQZZjWm46w595wiEMMZkm1EvkInymRJ4ZBlGi/qDLOAJeabAu97U4X2g0vcrKKbdTQ 3thPAiKwu33JqADp2A6jHwtzHwyUCz0jU+nM9gT4zH1H1a5VhJvDpf6VoTQgvEDMRXpIOYHNW90 6hRy/f0GcczR20Nvqz10T/S8rpOrc80UtbSY+6nijgyTmln/Yok1fUAu5oQKbbhHcNprHz7Sy+k dzmHX6gNcIvh7qwV4XA== X-Proofpoint-GUID: -opRUxCBQ87ofTNi4olODdbsoM2GysKf X-Authority-Analysis: v=2.4 cv=RKcmjIi+ c=1 sm=1 tr=0 ts=6aba7851 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=kmqKt6rW6CT7MOcbZeAA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-ORIG-GUID: QDIhRafS2tv1KtcByMsVqsVtQuv9E7le X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-28_03,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 spamscore=0 bulkscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609280056 On Mon, Sep 28, 2026 at 04:15:58PM +0200, Hendrik Brueckner wrote: > On Fri, Sep 18, 2026 at 03:31:00PM +0200, Steffen Eiden wrote: > > Add basic code for the new arm64 on s390 KVM implementation. > > Add kernel module boilerplate code and trivial functions. > > Add tracing scaffolding. > > > > Signed-off-by: Steffen Eiden > > --- > > arch/s390/kvm/arm64/arm.c | 147 ++++++++++++++++++++++++++++++++++++ > > arch/s390/kvm/arm64/arm.h | 44 +++++++++++ > > arch/s390/kvm/arm64/guest.c | 92 ++++++++++++++++++++++ > > arch/s390/kvm/arm64/trace.h | 18 +++++ > > 4 files changed, 301 insertions(+) > > create mode 100644 arch/s390/kvm/arm64/arm.c > > create mode 100644 arch/s390/kvm/arm64/arm.h > > create mode 100644 arch/s390/kvm/arm64/guest.c > > create mode 100644 arch/s390/kvm/arm64/trace.h > > > > diff --git a/arch/s390/kvm/arm64/arm.c b/arch/s390/kvm/arm64/arm.c > > new file mode 100644 > > index 000000000000..8b056fc836d7 > > --- /dev/null > > +++ b/arch/s390/kvm/arm64/arm.c > > [..] > > > +static int __init kvm_s390_arm64_init(void) > > +{ > > + if (!sclp.has_aef) > > + return -ENXIO; > > I suggest to use -ENODEV here to be consistent with s390 kvm module. > The arm64 module also return -ENODEV when not available. Makes sense. Thanks Steffen