GICD_SGIR is a 32-bit register, of which INTID is bits [3:0]
and Bits [14:4] is RES0. Since SgiId parameter in the function
ArmGicSendSgiTo () is UINT8, mask unused bits of SgiId before
writing to the GICD_SGIR register to prevent accidental setting
of the RES0 bits.
Signed-off-by: Sami Mujawar <sami.muja...@arm.com>
---
ArmPkg/Drivers/ArmGic/ArmGicLib.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
index
df61e3aad4a7899eaa888cb248ad2a285c7f317d..0127cca3bf0567bc80702f415e9cbb9bd2709fbc
100644
--- a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
+++ b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
@@ -1,6 +1,6 @@
/** @file
*
-* Copyright (c) 2011-2021, Arm Limited. All rights reserved.
+* Copyright (c) 2011-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
@@ -148,7 +148,9 @@ ArmGicSendSgiTo (
{
MmioWrite32 (
GicDistributorBase + ARM_GIC_ICDSGIR,
- ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId
+ ((TargetListFilter & 0x3) << 24) |
+ ((CPUTargetList & 0xFF) << 16) |
+ (SgiId & 0xF)
);
}
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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