From: Steffen Eiden Date: Mon, 9 Feb 2026 15:29:25 +0000 (+0100) Subject: KVM: s390: Increase permitted SE header size to 1 MiB X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3372ffb5f9e2dda3da259b768aab6271672b90d;p=thirdparty%2Fkernel%2Fstable.git KVM: s390: Increase permitted SE header size to 1 MiB Relax the maximum allowed Secure Execution (SE) header size from 8 KiB to 1 MiB. This allows individual secure guest images to run on a wider range of physical machines. Signed-off-by: Steffen Eiden Reviewed-by: Janosch Frank Reviewed-by: Claudio Imbrenda Signed-off-by: Claudio Imbrenda --- diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 9f24252775dd..de645025db0f 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -2589,9 +2589,9 @@ static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd) if (copy_from_user(&parms, argp, sizeof(parms))) break; - /* Currently restricted to 8KB */ + /* Currently restricted to 1MiB */ r = -EINVAL; - if (parms.length > PAGE_SIZE * 2) + if (parms.length > SZ_1M) break; r = -ENOMEM;