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Thu, 22 Oct 2026 15:55:32 +0000 (GMT) Received: from p-imbrenda.ehn-de.ibm.com (unknown [9.224.75.30]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 22 Oct 2026 15:55:32 +0000 (GMT) From: Claudio Imbrenda To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, david@kernel.org, nrb@linux.ibm.com, schlameuss@linux.ibm.com, gra@linux.ibm.com Subject: [PATCH v1 10/10] KVM: s390: Enable 1M pages by default Date: Thu, 22 Oct 2026 17:55:31 +0200 Message-ID: <20261022155531.204593-11-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261022155531.204593-1-imbrenda@linux.ibm.com> References: <20261022155531.204593-1-imbrenda@linux.ibm.com> X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIyMDA2MiBTYWx0ZWRfX9eCv0hPvXYwo +MlrTsEnw7+4ziJZw86r9sPDdrqZ7Dd7ksHKjvSUF3lTExHQXqPcpAZCwEl1rRryUrke0AnD+vj OItJH629eNm5InJKNMiBZ7mw50EKYDx8eA1sYRt4CrIwLrfPi+YL2ir2l+GTULr+KPlfVyvgb9D UuREBdFNsTg7a13pxBJr+gGeaXmeVkY6FVSsO4P073sdwdRrZc/GRpJogdvSbCJiGzThccpAESR 6a/HebcYoUCF20hzM1ICjnpXJM0DcEAfZqRUwP2lqe5xwZnBb4kfZWMq283D2qSK5mFqXe4B3ZT ktDi5Na5bQIj1HXvhb4aL6Fx5obCelZICSKy1+9L4Ijk228Iu7kpUO+5VtySLs64RKJySYTvRmP EZQ/D5b9ZfonC6PCHgez0BM93ghU6MJZm6rqbbst86RN3u/69Ps4d8e/Yb66C1Ef4CC34hS+F5S gJdi3dAh7VVGfB74YbA== X-Proofpoint-ORIG-GUID: m75Agf35zt2zooz5VOTTmFnAGuOgLi5l X-Proofpoint-GUID: m75Agf35zt2zooz5VOTTmFnAGuOgLi5l X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIyMDA2MiBTYWx0ZWRfX8UREXjsAd6yf ebEuciHgBwsVQWF+hvniVvJSYBPdt872SuYbwohjD9sB6k//uc0OIJLTRoF74/WIYFeV6I3bjG9 /KToO33zxtseezZ1YQpH2jcBNCGuvIY= X-Authority-Analysis: v=2.4 cv=ZfSIpcVA c=1 sm=1 tr=0 ts=6ada31fb cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=GTA4chkwOabIMoMS33IA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-22_05,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 malwarescore=0 spamscore=0 suspectscore=0 clxscore=1015 phishscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610220062 When userspace uses hugepages (e.g. hugetlbfs or THP), use hugepages for the guest mapping by default. Until now the hpage parameter had to be set manually when loading kvm. Signed-off-by: Claudio Imbrenda --- arch/s390/kvm/s390/s390.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kvm/s390/s390.c b/arch/s390/kvm/s390/s390.c index 280310870dac..71d79b4437ac 100644 --- a/arch/s390/kvm/s390/s390.c +++ b/arch/s390/kvm/s390/s390.c @@ -212,7 +212,7 @@ module_param(nested, int, S_IRUGO); MODULE_PARM_DESC(nested, "Nested virtualization support"); /* allow 1m huge page guest backing */ -static int hpage; +static int hpage = 1; module_param(hpage, int, 0444); MODULE_PARM_DESC(hpage, "1m huge page backing support"); -- 2.56.0