From: Steffen Eiden <seiden@linux.ibm.com>
To: linux-s390@vger.kernel.org
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Andreas Grapentin <gra@linux.ibm.com>,
Hendrik Brueckner <brueckner@linux.ibm.com>
Subject: [PATCH v1 1/1] KVM: s390: Increase permitted SE header size to 1 MiB
Date: Mon, 9 Feb 2026 16:29:25 +0100 [thread overview]
Message-ID: <20260209152925.578872-1-seiden@linux.ibm.com> (raw)
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>
---
arch/s390/kvm/kvm-s390.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 56a50524b3ee..3428a8d427b2 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2744,9 +2744,9 @@ 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;
--
2.51.0
next reply other threads:[~2026-02-09 15:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-09 15:29 Steffen Eiden [this message]
2026-02-09 17:16 ` Claudio Imbrenda
2026-02-10 9:45 ` Janosch Frank
2026-02-10 14:07 ` Hendrik Brueckner
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