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Wed, 1 Apr 2026 17:45:41 +0000 (GMT) Received: from brueckner by vela with local (Exim 4.99.1) (envelope-from ) id 1w7zdC-00000002Sb7-14uG; Wed, 01 Apr 2026 19:45:30 +0200 Date: Wed, 1 Apr 2026 19:45:30 +0200 From: Hendrik Brueckner To: Eric Farman Cc: Christian Borntraeger , Hendrik Brueckner , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Paolo Bonzini , Jonathan Corbet , Shuah Khan , kvm@vger.kernel.org, linux-s390@vger.kernel.org Subject: Re: [PATCH v2 1/4] KVM: s390: vsie: Allow non-zarch guests Message-ID: References: <20260401151221.2272408-1-farman@linux.ibm.com> <20260401151221.2272408-2-farman@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@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: <20260401151221.2272408-2-farman@linux.ibm.com> Sender: Hendrik Brueckner X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Fdo6BZ+6 c=1 sm=1 tr=0 ts=69cd59ca cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=kj9zAlcOel0A:10 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=RtfG19iD7UpRQCUH2uMA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-ORIG-GUID: J7yn467UIHThg1EpoOsm7VcMLIVpQhPs X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAxMDE2MiBTYWx0ZWRfX/69OUyOLMpo3 P1ssddpXmaLlW526ykBQzeulEJalsupjv03fqyxJCXCXkm9S57LEDA/ZIuLiebDpaG3uGrcRxV0 n7IhEa70OuPcNGrSBlvhepfwvQF01wasv7Lzl955GqgAAZ1TAkKvvgxFfUywqAJ1o2ZAcvqJ1y9 nA7baEgqnxCQAtBPFzJyphw1CkQ33pUXp7qmPLNlzzX1Bp5goed4WCSVLCaESHa3cYvo71r/I6W vAtFJGb5tU/W5yf7jcjCYZb9/w15mvOMb26HeeDQPbd4pK687kuGFjak+krg3ITPsLFmEAwj+gf 8R4HosxPfcXdOTzVtLAWQ+15zSzEMSS1tss9HvaNmJjNDr4FXAzWg29MhXpyxycLLAxKo85fR36 YvUxRcGwulfEdsL2n3G7vv+BnxuPtc3ArBBMV3iAl5haxKMHhrUQ/zLqpaiVaAmTPjm5WmIGwu1 kEBsMIrKFcbl6/H8qoA== X-Proofpoint-GUID: J7yn467UIHThg1EpoOsm7VcMLIVpQhPs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-01_04,2026-04-01_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1011 bulkscore=0 suspectscore=0 priorityscore=1501 adultscore=0 malwarescore=0 phishscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604010162 On Wed, Apr 01, 2026 at 05:12:18PM +0200, Eric Farman wrote: > Linux/KVM runs in z/Architecture-only mode. Although z/Architecture > is built upon a long history of hardware refinements, any other > CPU mode is not permitted. > > Allow a userspace to explicitly enable the use of ESA mode for > nested guests, otherwise usage will be rejected. > > Reviewed-by: Janosch Frank > Signed-off-by: Eric Farman Reviewed-by: Hendrik Brueckner