From: Arnd Bergmann <arnd@kernel.org>
To: Steffen Eiden <seiden@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Andreas Grapentin <gra@linux.ibm.com>,
Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>,
David Hildenbrand <david@kernel.org>,
kvm@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 2/2] s390: kvm: arm64: add HAS_IOMEM dependency
Date: Tue, 26 May 2026 14:52:20 +0200 [thread overview]
Message-ID: <20260526125220.1560451-2-arnd@kernel.org> (raw)
In-Reply-To: <20260526125220.1560451-1-arnd@kernel.org>
From: Arnd Bergmann <arnd@arndb.de>
The arm64 kvm driver can only be enabled when MMIO support is part of
the host kernel:
arch/s390/kvm/arm64/../../../../virt/kvm/arm64/mmio.c:120:27: error: 'struct kvm_vcpu' has no member named 'mmio_needed'
s390 does not support MMIO if PCI is disabled, but in practice one
would not actually need kvm support in those configurations either.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
This is currently needed for randconfig build testing the
'sae' branch, it is not yet in linux-next
---
arch/s390/kvm/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/s390/kvm/arm64/Kconfig b/arch/s390/kvm/arm64/Kconfig
index 42a1be50f6e1..65b9dc25fe62 100644
--- a/arch/s390/kvm/arm64/Kconfig
+++ b/arch/s390/kvm/arm64/Kconfig
@@ -3,6 +3,7 @@
config KVM_ARM64
def_tristate y
prompt "Kernel-based Virtual Machine (KVM) support for arm64 guests"
+ depends on HAS_IOMEM
select KVM
select KVM_VFIO
select IRQ_BYPASS_MANAGER
--
2.39.5
next prev parent reply other threads:[~2026-05-26 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 12:52 [PATCH 1/2] kvm: rework memory prefault Arnd Bergmann
2026-05-26 12:52 ` Arnd Bergmann [this message]
2026-05-26 17:08 ` [PATCH 2/2] s390: kvm: arm64: add HAS_IOMEM dependency Steffen Eiden
2026-05-26 21:20 ` Arnd Bergmann
2026-05-26 17:05 ` [PATCH 1/2] kvm: rework memory prefault Steffen Eiden
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