[edk2-devel] [PATCH v1 2/9] ArmPkg: PCD to select conduit for monitor calls

[Sami Mujawar]

Bugzilla: 3668 (https://bugzilla.tianocore.org/show_bug.cgi?id=3668)

Define a PCD 'PcdMonitorConduitHvc' to select the conduit to use for
monitor calls. PcdMonitorConduitHvc is defined as FALSE by default,
meaning the SMC conduit is enabled as default.

Adding PcdMonitorConduitHvc allows selection of HVC conduit to be used
by virtual firmware implementations.

Signed-off-by: Sami Mujawar <sami.mujawar at arm.com>
---
 ArmPkg/ArmPkg.dec | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ArmPkg/ArmPkg.dec b/ArmPkg/ArmPkg.dec
index 6ed51edd0340605639d4b34f77bdb59dca1827be..395d64d8aaeb772a6e094b3d90cd3920b844e372 100644
--- a/ArmPkg/ArmPkg.dec
+++ b/ArmPkg/ArmPkg.dec
@@ -131,6 +131,11 @@ [PcdsFeatureFlag.common]
   # Define if the GICv3 controller should use the GICv2 legacy
   gArmTokenSpaceGuid.PcdArmGicV3WithV2Legacy|FALSE|BOOLEAN|0x00000042
 
+  ## Define the conduit to use for monitor calls.
+  # Default PcdMonitorConduitHvc = FALSE, conduit = SMC
+  # If PcdMonitorConduitHvc = TRUE, conduit = HVC
+  gArmTokenSpaceGuid.PcdMonitorConduitHvc|FALSE|BOOLEAN|0x00000047
+
 [PcdsFeatureFlag.ARM]
   # Whether to map normal memory as non-shareable. FALSE is the safe choice, but
   # TRUE may be appropriate to fix performance problems if you don't care about
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'



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