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>
---
.../ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c | 33 ++++++++++++++++++++++
.../ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf | 1 +
2 files changed, 34 insertions(+)
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
index d002e668aa48..c49f726a7f10 100644
--- a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c
@@ -27,6 +27,7 @@
#include <libfdt.h>
#include <Guid/Fdt.h>
+#include <Protocol/XenIo.h>
#pragma pack (1)
typedef struct {
@@ -44,6 +45,7 @@ typedef enum {
PropertyTypeUart,
PropertyTypeTimer,
PropertyTypePsci,
+ PropertyTypeXen,
} PROPERTY_TYPE;
typedef struct {
@@ -59,6 +61,7 @@ STATIC CONST PROPERTY CompatibleProperties[] = {
{ PropertyTypeTimer, "arm,armv7-timer" },
{ PropertyTypeTimer, "arm,armv8-timer" },
{ PropertyTypePsci, "arm,psci-0.2" },
+ { PropertyTypeXen, "xen,xen" },
{ PropertyTypeUnknown, "" }
};
@@ -115,6 +118,7 @@ InitializeVirtFdtDxe (
CONST INTERRUPT_PROPERTY *InterruptProp;
INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;
CONST CHAR8 *PsciMethod;
+ XENIO_PROTOCOL *XenIo;
DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
ASSERT (DeviceTreeBase != NULL);
@@ -271,6 +275,35 @@ 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.
+ //
+ XenIo = AllocateZeroPool (sizeof *XenIo);
+ ASSERT (XenIo != NULL);
+ XenIo->GrantTableAddress = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
+
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (&Handle,
+ &gXenIoProtocolGuid, EFI_NATIVE_INTERFACE,
+ XenIo);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to install the XENIO_PROTOCOL "
+ "protocol on a new handle (Status == %r)\n",
+ __FUNCTION__, Status));
+ FreePool (XenIo);
+ break;
+ }
+ Status = gBS->ConnectController (Handle, NULL, NULL, TRUE);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to invoke ConnectController () on "
+ "XENIO_PROTOCOL instance (Status == %r)\n",
+ __FUNCTION__, Status));
+ }
+
default:
break;
}
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
index 1c9dd20580c4..16b5873d9451 100644
--- a/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf
@@ -57,6 +57,7 @@
[Protocols]
gEfiDevicePathProtocolGuid
+ gXenIoProtocolGuid
[Depex]
TRUE
--
1.8.3.2
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