[PATCH AUTOSEL 5.4 04/25] xen/privcmd: make option visible in Kconfig

Sasha Levin
2021-11-30T15:03:15Z

From: Juergen Gross <jgross@suse.com>

[ Upstream commit 897919ad8b42eb8222553838ab82414a924694aa ]

This configuration option provides a misc device as an API to userspace.
Make this API usable without having to select the module as a transitive
dependency.

This also fixes an issue where localyesconfig would select
CONFIG_XEN_PRIVCMD=m because it was not visible and defaulted to
building as module.

[boris: clarified help message per Jan's suggestion]

Based-on-patch-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20211116143323.18866-1-jgross@suse.com
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/xen/Kconfig | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index a50dadd010933..39edeaae1d7ad 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -231,9 +231,15 @@ config XEN_SCSI_BACKEND
if guests need generic access to SCSI devices.

config XEN_PRIVCMD
- tristate
+ tristate "Xen hypercall passthrough driver"
depends on XEN
default m
+ help
+ The hypercall passthrough driver allows privileged user programs to
+ perform Xen hypercalls. This driver is normally required for systems
+ running as Dom0 to perform privileged operations, but in some
+ disaggregated Xen setups this driver might be needed for other
+ domains, too.

config XEN_STUB
bool "Xen stub drivers"
--
2.33.0