[Xen-devel] [PATCH] arm/gic-v3: Fix driver probe fail on GICv4 hardware

[Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>]

The current driver probe fails on hardware which has GICv4 version,
even though it is fully compatible to GICv3. This patch fixes the
issue by registering the same probe function for GICv4 hardware.

Signed-off-by: Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>
---
 xen/arch/arm/gic-v3.c     | 13 +++++++++++++
 xen/include/asm-arm/gic.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index a095064..594cf6e 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -1604,10 +1604,23 @@ static int __init gicv3_acpi_preinit(const void *data)
     return 0;
 }
 
+static int __init gicv4_acpi_preinit(const void *data)
+{
+    gicv3_info.hw_version = GIC_V4;
+    register_gic_ops(&gicv3_ops);
+
+    return 0;
+}
+
 ACPI_DEVICE_START(agicv3, "GICv3", DEVICE_GIC)
         .class_type = ACPI_MADT_GIC_VERSION_V3,
         .init = gicv3_acpi_preinit,
 ACPI_DEVICE_END
+
+ACPI_DEVICE_START(agicv4, "GICv4", DEVICE_GIC)
+        .class_type = ACPI_MADT_GIC_VERSION_V4,
+        .init = gicv4_acpi_preinit,
+ACPI_DEVICE_END
 #endif
 
 /*
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index cd97bb2..5be814a 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -218,6 +218,7 @@ struct gic_lr {
 enum gic_version {
     GIC_V2,
     GIC_V3,
+    GIC_V4,
 };
 
 extern enum gic_version gic_hw_version(void);
-- 
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc. 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, 
a Linux Foundation Collaborative Project


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