From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, linux-s390@vger.kernel.org,
virtualization@lists.linux.dev,
"David Hildenbrand" <david@redhat.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Sven Schnelle" <svens@linux.ibm.com>,
"Thomas Huth" <thuth@redhat.com>,
"Cornelia Huck" <cohuck@redhat.com>,
"Janosch Frank" <frankja@linux.ibm.com>,
"Claudio Imbrenda" <imbrenda@linux.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Jason Wang" <jasowang@redhat.com>,
"Xuan Zhuo" <xuanzhuo@linux.alibaba.com>,
"Eugenio Pérez" <eperezma@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: [PATCH v1 4/5] lib/Kconfig.debug: default STRICT_DEVMEM to "y" on s390x
Date: Tue, 10 Sep 2024 21:15:38 +0200 [thread overview]
Message-ID: <20240910191541.2179655-5-david@redhat.com> (raw)
In-Reply-To: <20240910191541.2179655-1-david@redhat.com>
virtio-mem currently depends on !DEVMEM | STRICT_DEVMEM. Let's default
STRICT_DEVMEM to "y" just like we do for arm64 and x86.
There could be ways in the future to filter access to virtio-mem device
memory even without STRICT_DEVMEM, but for now let's just keep it
simple.
Signed-off-by: David Hildenbrand <david@redhat.com>
---
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a30c03a66172..fce22ce54983 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1887,7 +1887,7 @@ config STRICT_DEVMEM
bool "Filter access to /dev/mem"
depends on MMU && DEVMEM
depends on ARCH_HAS_DEVMEM_IS_ALLOWED || GENERIC_LIB_DEVMEM_IS_ALLOWED
- default y if PPC || X86 || ARM64
+ default y if PPC || X86 || ARM64 || S390
help
If this option is disabled, you allow userspace (root) access to all
of memory, including kernel and userspace memory. Accidental
--
2.46.0
next prev parent reply other threads:[~2024-09-10 19:16 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-10 19:15 [PATCH v1 0/5] virtio-mem: s390x support David Hildenbrand
2024-09-10 19:15 ` [PATCH v1 1/5] s390/kdump: implement is_kdump_kernel() David Hildenbrand
2024-09-10 19:15 ` [PATCH v1 2/5] s390/physmem_info: query diag500(STORAGE_LIMIT) to support QEMU/KVM memory devices David Hildenbrand
2024-09-10 19:15 ` [PATCH v1 3/5] virtio-mem: s390x support David Hildenbrand
2024-09-10 20:18 ` Michael S. Tsirkin
2024-09-10 19:15 ` David Hildenbrand [this message]
2024-09-10 19:15 ` [PATCH v1 5/5] s390/sparsemem: reduce section size to 128 MiB David Hildenbrand
2024-09-10 20:19 ` [PATCH v1 0/5] virtio-mem: s390x support Michael S. Tsirkin
2024-10-10 8:41 ` Mario Casquero
2024-10-10 12:31 ` David Hildenbrand
2024-10-10 14:41 ` Heiko Carstens
2024-10-10 14:42 ` David Hildenbrand
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