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[Xen-devel] [PATCH v8 for-4.12 01/17] argo: Introduce the Kconfig option to govern inclusion of Argo

Defines CONFIG_ARGO when enabled. Default: disabled.

When the Kconfig option is enabled, the Argo hypercall implementation
will be included, allowing use of the hypervisor-mediated interdomain
communication mechanism.

Argo is implemented for x86 and ARM hardware platforms.

Availability of the option depends on EXPERT and Argo is currently an
experimental feature.

Signed-off-by: Christopher Clark <christopher.clark6@xxxxxxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
v3 added Jan's Ack
v2 #01 feedback, Jan: replace def_bool/prompt with bool
v1 #02 feedback, Jan: default Kconfig off, use EXPERT, fix whitespace

 xen/common/Kconfig | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index a79cd40..0438462 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -202,6 +202,25 @@ config LATE_HWDOM
          If unsure, say N.
+config ARGO
+       bool "Argo: hypervisor-mediated interdomain communication" if EXPERT = 
+       ---help---
+         Enables a hypercall for domains to ask the hypervisor to perform
+         data transfer of messages between domains.
+         This allows communication channels to be established that do not
+         require any shared memory between domains; the hypervisor is the
+         entity that each domain interacts with. The hypervisor is able to
+         enforce Mandatory Access Control policy over the communication.
+         If XSM_FLASK is enabled, XSM policy can govern which domains may
+         communicate via the Argo system.
+         This feature does nothing if the "argo" boot parameter is not present.
+         Argo is disabled at runtime by default.
+         If unsure, say N.
 menu "Schedulers"
        visible if EXPERT = "y"

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