[PATCH AUTOSEL 4.14 02/14] xen/privcmd: make option visible in Kconfig

From: Sasha Levin
Date: Tue Nov 30 2021 - 10:07:34 EST


From: Juergen Gross <jgross@xxxxxxxx>

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

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 30187b86729bb..818e4809c2a54 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -218,9 +218,15 @@ 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