linux-kernel - [PATCH AUTOSEL 6.1 07/68] soc: xilinx: fix unhandled SGI warning message

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Date: Tue, 16 Jan 2024 14:53:06 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Tanmay Shah <tanmay.shah@...inx.com>,
	Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
	Michal Simek <michal.simek@....com>,
	Sasha Levin <sashal@...nel.org>,
	abhyuday.godhasara@...inx.com,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.1 07/68] soc: xilinx: fix unhandled SGI warning message

From: Tanmay Shah <tanmay.shah@...inx.com>

[ Upstream commit 9c6724abf969251af53cdae525ad8100ec78d3c2 ]

Xen broadcasts SGI to each VM when multiple VMs run on Xen hypervisor. In
such case spurious SGI is expected if one event is registered by one VM and
not registered by another VM. We let users know that Unhandled SGI is not
error and expected if kernel is running on Xen hypervisor.

Signed-off-by: Tanmay Shah <tanmay.shah@...inx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Link: https://lore.kernel.org/r/1698431039-2734260-1-git-send-email-radhey.shyam.pandey@amd.com
Signed-off-by: Michal Simek <michal.simek@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/xilinx/xlnx_event_manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/xilinx/xlnx_event_manager.c b/drivers/soc/xilinx/xlnx_event_manager.c
index 56d22d3989bb..8293cc40047f 100644
--- a/drivers/soc/xilinx/xlnx_event_manager.c
+++ b/drivers/soc/xilinx/xlnx_event_manager.c
@@ -477,7 +477,7 @@ static void xlnx_call_notify_cb_handler(const u32 *payload)
 		}
 	}
 	if (!is_callback_found)
-		pr_warn("Didn't find any registered callback for 0x%x 0x%x\n",
+		pr_warn("Unhandled SGI node 0x%x event 0x%x. Expected with Xen hypervisor\n",
 			payload[1], payload[2]);
 }
 
-- 
2.43.0