[PATCH v6 5/6] argo: introduce CONFIG_ARGO_DEBUG

[dmukhin@xxxxxxxx]

From: Denis Mukhin <dmukhin@xxxxxxxx> 

Add Kconfig knob to enable traces for Argo debugging.

Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
Changes since v5:
- dropped 'if ARGO' from the Kconfig change
- added Jason's R-b

Changes since v4:
- fixed dependency on a new Kconfig knob on ARGO

Changes since v3:
- dropped uneeded "If unsure, say N." from new Kconfig description
---
 xen/common/Kconfig | 6 ++++++
 xen/common/argo.c  | 3 +--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 5ff71480eebe..79b7fa62e713 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -491,6 +491,12 @@ config ARGO
 
          If unsure, say N.
 
+config ARGO_DEBUG
+       bool "Argo: enable debug traces (UNSUPPORTED)"
+       depends on ARGO
+       help
+         Enables extra debug traces for Argo debugging.
+
 source "common/sched/Kconfig"
 
 config CRYPTO
diff --git a/xen/common/argo.c b/xen/common/argo.c
index 3c38a51d09a2..b9b362064e7e 100644
--- a/xen/common/argo.c
+++ b/xen/common/argo.c
@@ -318,10 +318,9 @@ static DEFINE_RWLOCK(L1_global_argo_rwlock); /* L1 */
     ((LOCKING_Read_L1 && spin_is_locked(&(d)->argo->send_L2_lock)) || \
      LOCKING_Write_L1)
 
-#define ARGO_DEBUG 0
 #define argo_dprintk(fmt, args...)                      \
     do {                                                \
-        if ( ARGO_DEBUG )                               \
+        if ( IS_ENABLED(CONFIG_ARGO_DEBUG) )            \
             gprintk(XENLOG_DEBUG, "argo: " fmt, ##args);\
     } while ( 0 )
 
-- 
2.54.0