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Fri, 10 Apr 2026 09:15:15 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Fri, 10 Apr 2026 11:15:04 +0200 Message-Id: From: "Christoph Schlameuss" Cc: , , , , , , , , To: "Claudio Imbrenda" , Subject: Re: [PATCH v3 2/6] KVM: s390: Add alignment checks for hugepages X-Mailer: aerc 0.21.0 References: <20260402150135.196943-1-imbrenda@linux.ibm.com> <20260402150135.196943-3-imbrenda@linux.ibm.com> In-Reply-To: <20260402150135.196943-3-imbrenda@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEwMDA4MSBTYWx0ZWRfX4mR7qbe5SKbc s8r+19+IaHad76tSmadhRdeR4RYbKQ3DaSp496bmwDE87qqtZ5Tfoqoyk2hmLMH4OIjkg7YmNdP sy83ADwFO1pZi4RydgxM0QPN7igiahlBCcvZn/IA1Xm1cNmjrmXPFTJuzif4OyCM6iN6tqD124E QgbLuXxEzZ3FMQopyvBhFe3Xp9Af4ZATy0fB+jRJGLF4PuuvT+vBVWBI/1IVivgZBSe2fuWiVyu CpT8di8ETpChMR8SllJhgeLDF4D4kaou8z/BzNze/bzmAaSpYoGjlTLKmDHNilcxGy3GYwrd/8z l289PZ6k44RkjXtq9KyBxVT9yJnGUK0ARfnFqQYpS9C55AXrN+3fcaNDRNU8XoOMcI1C1naq3J8 iyXh3F/yURNkpWZTjw/2yw9h5LumVhkQoW7eFJp1M0+3fQt+zVucQGyw4KW/mBfX0FTh+EN5kqc 4svxdvKEovW2a6jCy1g== X-Proofpoint-GUID: ksS_2FQ0LXp2HbOnICLj-kvSnbByvBqE X-Authority-Analysis: v=2.4 cv=a/wAM0SF c=1 sm=1 tr=0 ts=69d8bfa8 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=bwOT_0aHw2EZLAc2GVcA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: ksS_2FQ0LXp2HbOnICLj-kvSnbByvBqE 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=2026-04-10_02,2026-04-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 spamscore=0 impostorscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604100081 On Thu Apr 2, 2026 at 5:01 PM CEST, Claudio Imbrenda wrote: > When backing a guest page with a large page, check that the alignment > of the guest page matches the alignment of the host physical page > backing it within the large page. > > Also check that the memslot is large enough to fit the large page. > > Those checks are currently not needed, because memslots are guaranteed > to be 1m-aligned, but this will change. > > Signed-off-by: Claudio Imbrenda Reviewed-by: Christoph Schlameuss > --- > arch/s390/kvm/faultin.c | 2 +- > arch/s390/kvm/gmap.c | 32 ++++++++++++++++++++++++++------ > arch/s390/kvm/gmap.h | 3 ++- > 3 files changed, 29 insertions(+), 8 deletions(-)