diff options
| -rw-r--r-- | OvmfPkg/AcpiPlatformDxe/PciDecoding.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/OvmfPkg/AcpiPlatformDxe/PciDecoding.c b/OvmfPkg/AcpiPlatformDxe/PciDecoding.c index 3b9b12ccc8..d63b57e701 100644 --- a/OvmfPkg/AcpiPlatformDxe/PciDecoding.c +++ b/OvmfPkg/AcpiPlatformDxe/PciDecoding.c @@ -89,6 +89,7 @@ EnablePciDecoding ( for (Idx = 0; Idx < NoHandles; ++Idx) {
EFI_PCI_IO_PROTOCOL *PciIo;
+ UINT64 Attributes;
//
// Look up PciIo on the handle and stash it
@@ -110,11 +111,22 @@ EnablePciDecoding ( }
//
+ // Retrieve supported attributes
+ //
+ Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationSupported, 0,
+ &Attributes);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_WARN, "%a: EfiPciIoAttributeOperationSupported: %r\n",
+ __FUNCTION__, Status));
+ goto RestoreAttributes;
+ }
+
+ //
// Enable IO and MMIO decoding
//
+ Attributes &= EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY;
Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationEnable,
- EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY,
- NULL);
+ Attributes, NULL);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN, "%a: EfiPciIoAttributeOperationEnable: %r\n",
__FUNCTION__, Status));
|