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[edk2,RFC,5/5] ArmVirtualizationPkg/VirtFdtDxe: wire up XenBusDxe to "xen, xen" DT node

Message ID 1420195510-22100-6-git-send-email-ard.biesheuvel@linaro.org
State New
Headers show

Commit Message

Ard Biesheuvel Jan. 2, 2015, 10:45 a.m. UTC 
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.biesheuvel@linaro.org>
---
 .../ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c   | 33 ++++++++++++++++++++++
 .../ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf |  1 +
 2 files changed, 34 insertions(+)
diff mbox

Patch

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