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KVM: s390: Increase permitted SE header size to 1 MiB

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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>
This commit is contained in:
Steffen Eiden
2026-02-09 16:29:25 +01:00
committed by Claudio Imbrenda
parent 46aa186a08
commit e3372ffb5f
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kvm/kvm-s390.c
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@@ -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;