Commit e3372ffb authored Feb 09, 2026 by Steffen Eiden Committed by Claudio Imbrenda Feb 10, 2026

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 <seiden@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

parent 46aa186a

arch/s390/kvm/kvm-s390.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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;