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linux-headers: sync VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE 

Let's synchronize the new feature flag, available in Linux since
v5.16-rc1.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20211217134039.29670-2-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2021-12-17 14:40:37 +01:00 committed by Michael S. Tsirkin
parent d135536d5f
commit 3ff9b192de
1 changed files with 6 additions and 3 deletions
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9
include/standard-headers/linux/virtio_mem.h
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@ -68,9 +68,10 @@
* explicitly triggered (VIRTIO_MEM_REQ_UNPLUG).
*
* There are no guarantees what will happen if unplugged memory is
* read/written. Such memory should, in general, not be touched. E.g.,
* even writing might succeed, but the values will simply be discarded at
* random points in time.
* read/written. In general, unplugged memory should not be touched, because
* the resulting action is undefined. There is one exception: without
* VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE, unplugged memory inside the usable
* region can be read, to simplify creation of memory dumps.
*
* It can happen that the device cannot process a request, because it is
* busy. The device driver has to retry later.
@ -87,6 +88,8 @@
/* node_id is an ACPI PXM and is valid */
#define VIRTIO_MEM_F_ACPI_PXM 0
/* unplugged memory must not be accessed */
#define VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE 1
/* --- virtio-mem: guest -> host requests --- */