This patchs adds support to VirtFdtDxe for the Xen DT node which
contains the base address of the Grant Table. This data is communicated
to XenBusDxe using a XENIO_PROTOCOL instance.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c | 23
+++++++++++++++++++++++
ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf | 1 +
2 files changed, 24 insertions(+)
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
index 34fac40fa803..1ceb85146430 100644
--- a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
@@ -26,6 +26,7 @@
#include <Library/DxeServicesLib.h>
#include <Library/HobLib.h>
#include <libfdt.h>
+#include <Library/XenIoMmioLib.h>
#include <Guid/Fdt.h>
#include <Guid/VirtioMmioTransport.h>
@@ -49,6 +50,7 @@ typedef enum {
PropertyTypePsci,
PropertyTypeFwCfg,
PropertyTypeGicV3,
+ PropertyTypeXen,
} PROPERTY_TYPE;
typedef struct {
@@ -66,6 +68,7 @@ STATIC CONST PROPERTY CompatibleProperties[] = {
{ PropertyTypePsci, "arm,psci-0.2" },
{ PropertyTypeFwCfg, "qemu,fw-cfg-mmio" },
{ PropertyTypeGicV3, "arm,gic-v3" },
+ { PropertyTypeXen, "xen,xen" },
{ PropertyTypeUnknown, "" }
};
@@ -332,6 +335,26 @@ InitializeVirtFdtDxe (
}
break;
+ case PropertyTypeXen:
+ ASSERT (Len == 16);
+
+ //
+ // Retrieve the reg base from this node and add it to a
+ // XENIO_PROTOCOL instance installed on a new handle.
+ //
+ RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
+ Handle = NULL;
+ Status = XenIoMmioInstall (&Handle, RegBase);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to install XENIO_PROTOCOL on a new
handle "
+ "(Status == %r)\n", __FUNCTION__, Status));
+ break;
+ }
+
+ DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%p\n",
RegBase));
+
+ break;
+
default:
break;
}
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
index 1392c7c3fa45..f8a58238c37b 100644
--- a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
@@ -41,6 +41,7 @@
FdtLib
VirtioMmioDeviceLib
HobLib
+ XenIoMmioLib
[Guids]
gFdtTableGuid
--
1.8.3.2
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