diff options
Diffstat (limited to 'OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c')
| -rw-r--r-- | OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c b/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c new file mode 100644 index 0000000000..2b2dc57675 --- /dev/null +++ b/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c @@ -0,0 +1,268 @@ +/** @file
+ OVMF ACPI Platform Driver for Xen guests
+
+ Copyright (C) 2021, Red Hat, Inc.
+ Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h> // ASSERT_EFI_ERROR()
+#include <Library/UefiBootServicesTableLib.h> // gBS
+#include <Library/XenPlatformLib.h> // XenDetected()
+#include <Protocol/FirmwareVolume2.h> // gEfiFirmwareVolume2Protocol...
+
+#include "AcpiPlatform.h"
+
+EFI_STATUS
+EFIAPI
+InstallAcpiTable (
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
+ IN VOID *AcpiTableBuffer,
+ IN UINTN AcpiTableBufferSize,
+ OUT UINTN *TableKey
+ )
+{
+ return AcpiProtocol->InstallAcpiTable (
+ AcpiProtocol,
+ AcpiTableBuffer,
+ AcpiTableBufferSize,
+ TableKey
+ );
+}
+
+
+/**
+ Locate the first instance of a protocol. If the protocol requested is an
+ FV protocol, then it will return the first FV that contains the ACPI table
+ storage file.
+
+ @param Instance Return pointer to the first instance of the protocol
+
+ @return EFI_SUCCESS The function completed successfully.
+ @return EFI_NOT_FOUND The protocol could not be located.
+ @return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
+
+**/
+EFI_STATUS
+LocateFvInstanceWithTables (
+ OUT EFI_FIRMWARE_VOLUME2_PROTOCOL **Instance
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *HandleBuffer;
+ UINTN NumberOfHandles;
+ EFI_FV_FILETYPE FileType;
+ UINT32 FvStatus;
+ EFI_FV_FILE_ATTRIBUTES Attributes;
+ UINTN Size;
+ UINTN Index;
+ EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
+
+ FvStatus = 0;
+
+ //
+ // Locate protocol.
+ //
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiFirmwareVolume2ProtocolGuid,
+ NULL,
+ &NumberOfHandles,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Defined errors at this time are not found and out of resources.
+ //
+ return Status;
+ }
+
+ //
+ // Looking for FV with ACPI storage file
+ //
+ for (Index = 0; Index < NumberOfHandles; Index++) {
+ //
+ // Get the protocol on this handle
+ // This should not fail because of LocateHandleBuffer
+ //
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiFirmwareVolume2ProtocolGuid,
+ (VOID**) &FvInstance
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // See if it has the ACPI storage file
+ //
+ Status = FvInstance->ReadFile (
+ FvInstance,
+ (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
+ NULL,
+ &Size,
+ &FileType,
+ &Attributes,
+ &FvStatus
+ );
+
+ //
+ // If we found it, then we are done
+ //
+ if (Status == EFI_SUCCESS) {
+ *Instance = FvInstance;
+ break;
+ }
+ }
+
+ //
+ // Our exit status is determined by the success of the previous operations
+ // If the protocol was found, Instance already points to it.
+ //
+
+ //
+ // Free any allocated buffers
+ //
+ gBS->FreePool (HandleBuffer);
+
+ return Status;
+}
+
+
+/**
+ Find ACPI tables in an FV and install them.
+
+ This is now a fall-back path. Normally, we will search for tables provided
+ by the VMM first.
+
+ If that fails, we use this function to load the ACPI tables from an FV. The
+ sources for the FV based tables is located under OvmfPkg/AcpiTables.
+
+ @param AcpiTable Protocol instance pointer
+
+**/
+EFI_STATUS
+EFIAPI
+InstallOvmfFvTables (
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
+ INTN Instance;
+ EFI_ACPI_COMMON_HEADER *CurrentTable;
+ UINTN TableHandle;
+ UINT32 FvStatus;
+ UINTN TableSize;
+ UINTN Size;
+ EFI_ACPI_TABLE_INSTALL_ACPI_TABLE TableInstallFunction;
+
+ Instance = 0;
+ CurrentTable = NULL;
+ TableHandle = 0;
+
+ if (QemuDetected ()) {
+ TableInstallFunction = QemuInstallAcpiTable;
+ } else {
+ TableInstallFunction = InstallAcpiTable;
+ }
+
+ //
+ // set FwVol (and use an ASSERT() below) to suppress incorrect
+ // compiler/analyzer warnings
+ //
+ FwVol = NULL;
+ //
+ // Locate the firmware volume protocol
+ //
+ Status = LocateFvInstanceWithTables (&FwVol);
+ if (EFI_ERROR (Status)) {
+ return EFI_ABORTED;
+ }
+ ASSERT (FwVol != NULL);
+
+ //
+ // Read tables from the storage file.
+ //
+ while (Status == EFI_SUCCESS) {
+
+ Status = FwVol->ReadSection (
+ FwVol,
+ (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
+ EFI_SECTION_RAW,
+ Instance,
+ (VOID**) &CurrentTable,
+ &Size,
+ &FvStatus
+ );
+ if (!EFI_ERROR (Status)) {
+ //
+ // Add the table
+ //
+ TableHandle = 0;
+
+ TableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable)->Length;
+ ASSERT (Size >= TableSize);
+
+ //
+ // Install ACPI table
+ //
+ Status = TableInstallFunction (
+ AcpiTable,
+ CurrentTable,
+ TableSize,
+ &TableHandle
+ );
+
+ //
+ // Free memory allocated by ReadSection
+ //
+ gBS->FreePool (CurrentTable);
+
+ if (EFI_ERROR (Status)) {
+ return EFI_ABORTED;
+ }
+
+ //
+ // Increment the instance
+ //
+ Instance++;
+ CurrentTable = NULL;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Effective entrypoint of Acpi Platform driver.
+
+ @param ImageHandle
+ @param SystemTable
+
+ @return EFI_SUCCESS
+ @return EFI_LOAD_ERROR
+ @return EFI_OUT_OF_RESOURCES
+
+**/
+EFI_STATUS
+EFIAPI
+InstallAcpiTables (
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
+ )
+{
+ EFI_STATUS Status;
+
+ if (XenDetected ()) {
+ Status = InstallXenTables (AcpiTable);
+ } else {
+ Status = InstallQemuFwCfgTables (AcpiTable);
+ }
+
+ if (EFI_ERROR (Status)) {
+ Status = InstallOvmfFvTables (AcpiTable);
+ }
+
+ return Status;
+}
+
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