diff options
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/virtio/virtio_mem.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig index 3654def9915c..44a082639439 100644 --- a/drivers/virtio/Kconfig +++ b/drivers/virtio/Kconfig @@ -101,6 +101,7 @@ config VIRTIO_MEM depends on MEMORY_HOTPLUG depends on MEMORY_HOTREMOVE depends on CONTIG_ALLOC + depends on EXCLUSIVE_SYSTEM_RAM help This driver provides access to virtio-mem paravirtualized memory devices, allowing to hotplug and hotunplug memory. diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 3573b78f6b05..0da0af251c73 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -2672,8 +2672,10 @@ static int virtio_mem_create_resource(struct virtio_mem *vm) if (!name) return -ENOMEM; + /* Disallow mapping device memory via /dev/mem completely. */ vm->parent_resource = __request_mem_region(vm->addr, vm->region_size, - name, IORESOURCE_SYSTEM_RAM); + name, IORESOURCE_SYSTEM_RAM | + IORESOURCE_EXCLUSIVE); if (!vm->parent_resource) { kfree(name); dev_warn(&vm->vdev->dev, "could not reserve device region\n"); |