diff options
| author | Gary Lin <glin@suse.com> | 2016-06-01 18:26:20 +0800 |
|---|---|---|
| committer | Jordan Justen <jordan.l.justen@intel.com> | 2016-06-02 13:34:28 -0700 |
| commit | da2369d21d2e57a0de8fa7ae954812122c87326e (patch) | |
| tree | 1044125e6dbdbdd0ef79f131907956fa438491cf /OvmfPkg | |
| parent | 05bf4747dd8e412d10fccbe35346aa2597b4167b (diff) | |
| download | edk2-platforms-da2369d21d2e57a0de8fa7ae954812122c87326e.tar.xz | |
OvmfPkg/PlatformBootManagerLib: Connect the Xen drivers before loading NvVars
When OVMF tried to load the file-based NvVars, it checked all the PCI
instances and connected the drivers to the mass storage device. However,
Xen registered its PCI device with a special class id (0xFF80), so
ConnectRecursivelyIfPciMassStorage() couldn't recognize it and skipped the
driver connecting for Xen PCI devices. In the end, the Xen block device
wasn't initialized until EfiBootManagerConnectAll() was called, and it's
already too late to load NvVars.
This commit connects the Xen drivers in ConnectRecursivelyIfPciMassStorage()
so that Xen can use the file-based NvVars.
v3:
* Introduce XenDetected() to cache the result of Xen detection instead
of relying on PcdPciDisableBusEnumeration.
v2:
* Cosmetic changes
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c | 41 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf | 1 |
2 files changed, 40 insertions, 2 deletions
diff --git a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c index befcc5707a..912c5ed1ec 100644 --- a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c +++ b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c @@ -13,6 +13,7 @@ **/
#include "BdsPlatform.h"
+#include <Guid/XenInfo.h>
#include <Guid/RootBridgesConnectedEventGroup.h>
@@ -1037,6 +1038,37 @@ PciAcpiInitialization ( IoOr16 ((PciRead32 (Pmba) & ~BIT0) + 4, BIT0);
}
+/**
+ This function detects if OVMF is running on Xen.
+
+**/
+STATIC
+BOOLEAN
+XenDetected (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+ STATIC INTN FoundHob = -1;
+
+ if (FoundHob == 0) {
+ return FALSE;
+ } else if (FoundHob == 1) {
+ return TRUE;
+ }
+
+ //
+ // See if a XenInfo HOB is available
+ //
+ GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
+ if (GuidHob == NULL) {
+ FoundHob = 0;
+ return FALSE;
+ }
+
+ FoundHob = 1;
+ return TRUE;
+}
EFI_STATUS
EFIAPI
@@ -1050,7 +1082,11 @@ ConnectRecursivelyIfPciMassStorage ( EFI_DEVICE_PATH_PROTOCOL *DevicePath;
CHAR16 *DevPathStr;
- if (IS_CLASS1 (PciHeader, PCI_CLASS_MASS_STORAGE)) {
+ //
+ // Recognize PCI Mass Storage, and Xen PCI devices
+ //
+ if (IS_CLASS1 (PciHeader, PCI_CLASS_MASS_STORAGE) ||
+ (XenDetected() && IS_CLASS2 (PciHeader, 0xFF, 0x80))) {
DevicePath = NULL;
Status = gBS->HandleProtocol (
Handle,
@@ -1068,7 +1104,8 @@ ConnectRecursivelyIfPciMassStorage ( if (DevPathStr != NULL) {
DEBUG((
EFI_D_INFO,
- "Found Mass Storage device: %s\n",
+ "Found %s device: %s\n",
+ IS_CLASS1 (PciHeader, PCI_CLASS_MASS_STORAGE) ? L"Mass Storage" : L"Xen",
DevPathStr
));
FreePool(DevPathStr);
diff --git a/OvmfPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf b/OvmfPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf index 5fcee3c55c..ffa1288e4d 100644 --- a/OvmfPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf +++ b/OvmfPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf @@ -74,5 +74,6 @@ gEfiLoadedImageProtocolGuid # PROTOCOL SOMETIMES_PRODUCED
[Guids]
+ gEfiXenInfoGuid
gEfiEndOfDxeEventGroupGuid
gRootBridgesConnectedEventGroupGuid
|