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Mon, 28 Sep 2026 14:15:59 +0000 (GMT) Received: from vela (unknown [9.111.89.89]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTPS; Mon, 28 Sep 2026 14:15:59 +0000 (GMT) Received: from brueckner by vela with local (Exim 4.99.5) (envelope-from ) id 1xBC98-0000000C3I8-3ejc; Mon, 28 Sep 2026 16:15:58 +0200 Date: Mon, 28 Sep 2026 16:15:58 +0200 From: Hendrik Brueckner To: Steffen Eiden 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 , Hendrik Brueckner , 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: References: <20260918133107.1042730-1-seiden@linux.ibm.com> <20260918133107.1042730-24-seiden@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260918133107.1042730-24-seiden@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=FYWiV5+6 c=1 sm=1 tr=0 ts=6aba76a7 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=nnIaaF498kqO1bEHNMIA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI4MDA1NiBTYWx0ZWRfX72hKPbHn0oBk RVFuvBqH8UHPWEoKzXdQr64GJWDGGWKnIO1MVn7goXs69X8xC7jB4YwC1auPz/wXgY+NIiJmji4 d2xLMIzsZPnbCNiU1IPsNlQcBk50BGk= X-Proofpoint-ORIG-GUID: c8k90I_35h1vfDy12bjJ-4_B4O-n2PNu X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI4MDA1NiBTYWx0ZWRfX6cPRFJGxV5Ug TAb9cNc5k7WfJCqfLczGDe5HlTRxPb4/jrOu3EyqNFsXiIXGE/HTuUQWdIlsPCB0lyUVd9ijXGK qrkARkw5fH5VyeBdLrYhaxLZ7HEZJNw2FMXASvcymwIkuVHt7IiIGR3KZB3l6+lzE+7CAbGjzG2 3HjsWMAQp0EgYWgXjqplQGXaouXCHjnM4HLI5S/fIDehHStPOKdeDOsMYXUyVOdX2XadHW4ssU2 XY82J2DcaQDjianPr97X326Q21kz6kvzfoDn+QIeW3SFViYyExlRCwwlJD+QT9AtrNul/nKFGm/ zP02XnFqeHjAqDTQJUjG7ijPg45l5Qs19aZaLW6wbbBMjTLBa66EJZYiFauL+kFRkFcZtQ4jm8S paXA0duaRBpGf0gY/k7Lqy/jtAI2xhiNBzXOi8F3cpvQ01wt8Fln72L34jmpDg2doVfTq6T1HVh 2zGyVeJyg0a5Tx+qyoA== X-Proofpoint-GUID: gQs0JtJQ3bmijgSPG4xGjgWcJAErDcqK 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 adultscore=0 clxscore=1011 impostorscore=0 spamscore=0 phishscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609280056 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260928_071623_525096_FC54F76C X-CRM114-Status: GOOD ( 19.13 ) 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 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.