Signed-off-by: Ralf Ramsauer <[email protected]>
---
Documentation/hypervisor-interfaces.txt | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/Documentation/hypervisor-interfaces.txt
b/Documentation/hypervisor-interfaces.txt
index 8dd58750..a06747df 100644
--- a/Documentation/hypervisor-interfaces.txt
+++ b/Documentation/hypervisor-interfaces.txt
@@ -274,18 +274,23 @@ Communication Region
The communication region is a per-cell shared memory area that both the
hypervisor and the particular cell can read from and write to by default. It is
-an optional communication mechanism. If the region shall be used by a cell, it
-has to be mapped into the cell's address space via its configuration (see [2]
-for details). If the cell is configured to be passive with respect to the
-communication region (cell flag JAILHOUSE_CELL_PASSIVE_COMMREG) and the region
-is mapped, it has to be declared read-only in the cell configuration.
+an optional communication mechanism. For inmates shipped with jailhouse, this
+region is mandatory. If the region shall be used by a cell, it has to be mapped
+into the cell's address space via its configuration (see [2] for details). If
+the cell is configured to be passive with respect to the communication region
+(cell flag JAILHOUSE_CELL_PASSIVE_COMMREG) and the region is mapped, it has to
+be declared read-only in the cell configuration.
Communication region layout
- - - - - - - - - - - - - -
+------------------------------+ - begin of communication region
- | Message to Cell (32 bit) | (lower address)
+ | Magic signature JHCOMM (6b) | (lower address)
+ +------------------------------+
+ | ABI revision (16 bit) |
+ +------------------------------+
+ | Message to Cell (32 bit) |
+------------------------------+
| Message from Cell (32 bit) |
+------------------------------+
--
2.17.0
--
You received this message because you are subscribed to the Google Groups
"Jailhouse" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
