diff options
| -rw-r--r-- | OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c | 3 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf | 3 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c | 969 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.h | 53 |
4 files changed, 1028 insertions, 0 deletions
diff --git a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c index cd09b2781e..d6e1e93399 100644 --- a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c +++ b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c @@ -13,6 +13,7 @@ **/
#include "BdsPlatform.h"
+#include "QemuBootOrder.h"
//
@@ -1138,6 +1139,8 @@ Returns: BdsLibConnectAll ();
BdsLibEnumerateAllBootOption (BootOptionList);
+ SetBootOrderFromQemu (BootOptionList);
+
//
// Please uncomment above ConnectAll and EnumerateAll code and remove following first boot
// checking code in real production tip.
diff --git a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf index eb773377cb..81602f5e61 100644 --- a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf +++ b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf @@ -29,7 +29,9 @@ [Sources]
BdsPlatform.c
PlatformData.c
+ QemuBootOrder.c
BdsPlatform.h
+ QemuBootOrder.h
[Packages]
MdePkg/MdePkg.dec
@@ -47,6 +49,7 @@ GenericBdsLib
PciLib
NvVarsFileLib
+ QemuFwCfgLib
[Pcd]
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdPlatformBootTimeOut
diff --git a/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c new file mode 100644 index 0000000000..2273d829c1 --- /dev/null +++ b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c @@ -0,0 +1,969 @@ +/** @file
+ Rewrite the BootOrder NvVar based on QEMU's "bootorder" fw_cfg file.
+
+ Copyright (C) 2012, Red Hat, Inc.
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+#include <Library/QemuFwCfgLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/GenericBdsLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PrintLib.h>
+#include <Protocol/DevicePathToText.h>
+#include <Guid/GlobalVariable.h>
+
+
+/**
+ OpenFirmware to UEFI device path translation output buffer size in CHAR16's.
+**/
+#define TRANSLATION_OUTPUT_SIZE 0x100
+
+
+/**
+ Number of nodes in OpenFirmware device paths that is required and examined.
+**/
+#define FIXED_OFW_NODES 4
+
+
+/**
+ Simple character classification routines, corresponding to POSIX class names
+ and ASCII encoding.
+**/
+STATIC
+BOOLEAN
+IsAlnum (
+ IN CHAR8 Chr
+ )
+{
+ return (('0' <= Chr && Chr <= '9') ||
+ ('A' <= Chr && Chr <= 'Z') ||
+ ('a' <= Chr && Chr <= 'z')
+ );
+}
+
+
+STATIC
+BOOLEAN
+IsDriverNamePunct (
+ IN CHAR8 Chr
+ )
+{
+ return (Chr == ',' || Chr == '.' || Chr == '_' ||
+ Chr == '+' || Chr == '-'
+ );
+}
+
+
+STATIC
+BOOLEAN
+IsPrintNotDelim (
+ IN CHAR8 Chr
+ )
+{
+ return (32 <= Chr && Chr <= 126 &&
+ Chr != '/' && Chr != '@' && Chr != ':');
+}
+
+
+/**
+ Utility types and functions.
+**/
+typedef struct {
+ CONST CHAR8 *Ptr; // not necessarily NUL-terminated
+ UINTN Len; // number of non-NUL characters
+} SUBSTRING;
+
+
+/**
+
+ Check if Substring and String have identical contents.
+
+ The function relies on the restriction that a SUBSTRING cannot have embedded
+ NULs either.
+
+ @param[in] Substring The SUBSTRING input to the comparison.
+
+ @param[in] String The ASCII string input to the comparison.
+
+
+ @return Whether the inputs have identical contents.
+
+**/
+STATIC
+BOOLEAN
+SubstringEq (
+ IN SUBSTRING Substring,
+ IN CONST CHAR8 *String
+ )
+{
+ UINTN Pos;
+ CONST CHAR8 *Chr;
+
+ Pos = 0;
+ Chr = String;
+
+ while (Pos < Substring.Len && Substring.Ptr[Pos] == *Chr) {
+ ++Pos;
+ ++Chr;
+ }
+
+ return (Pos == Substring.Len && *Chr == '\0');
+}
+
+
+/**
+
+ Parse a comma-separated list of hexadecimal integers into the elements of an
+ UINT32 array.
+
+ Whitespace, "0x" prefixes, leading or trailing commas, sequences of commas,
+ or an empty string are not allowed; they are rejected.
+
+ The function relies on ASCII encoding.
+
+ @param[in] UnitAddress The substring to parse.
+
+ @param[out] Result The array, allocated by the caller, to receive
+ the parsed values. This parameter may be NULL if
+ NumResults is zero on input.
+
+ @param[in out] NumResults On input, the number of elements allocated for
+ Result. On output, the number of elements it has
+ taken (or would have taken) to parse the string
+ fully.
+
+
+ @retval RETURN_SUCCESS UnitAddress has been fully parsed.
+ NumResults is set to the number of parsed
+ values; the corresponding elements have
+ been set in Result. The rest of Result's
+ elements are unchanged.
+
+ @retval RETURN_BUFFER_TOO_SMALL UnitAddress has been fully parsed.
+ NumResults is set to the number of parsed
+ values, but elements have been stored only
+ up to the input value of NumResults, which
+ is less than what has been parsed.
+
+ @retval RETURN_INVALID_PARAMETER Parse error. The contents of Results is
+ indeterminate. NumResults has not been
+ changed.
+
+**/
+STATIC
+RETURN_STATUS
+ParseUnitAddressHexList (
+ IN SUBSTRING UnitAddress,
+ OUT UINT32 *Result,
+ IN OUT UINTN *NumResults
+ )
+{
+ UINTN Entry; // number of entry currently being parsed
+ UINT32 EntryVal; // value being constructed for current entry
+ CHAR8 PrevChr; // UnitAddress character previously checked
+ UINTN Pos; // current position within UnitAddress
+ RETURN_STATUS Status;
+
+ Entry = 0;
+ EntryVal = 0;
+ PrevChr = ',';
+
+ for (Pos = 0; Pos < UnitAddress.Len; ++Pos) {
+ CHAR8 Chr;
+ INT8 Val;
+
+ Chr = UnitAddress.Ptr[Pos];
+ Val = ('a' <= Chr && Chr <= 'f') ? (Chr - 'a' + 10) :
+ ('A' <= Chr && Chr <= 'F') ? (Chr - 'A' + 10) :
+ ('0' <= Chr && Chr <= '9') ? (Chr - '0' ) :
+ -1;
+
+ if (Val >= 0) {
+ if (EntryVal > 0xFFFFFFF) {
+ return RETURN_INVALID_PARAMETER;
+ }
+ EntryVal = (EntryVal << 4) | Val;
+ } else if (Chr == ',') {
+ if (PrevChr == ',') {
+ return RETURN_INVALID_PARAMETER;
+ }
+ if (Entry < *NumResults) {
+ Result[Entry] = EntryVal;
+ }
+ ++Entry;
+ EntryVal = 0;
+ } else {
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ PrevChr = Chr;
+ }
+
+ if (PrevChr == ',') {
+ return RETURN_INVALID_PARAMETER;
+ }
+ if (Entry < *NumResults) {
+ Result[Entry] = EntryVal;
+ Status = RETURN_SUCCESS;
+ } else {
+ Status = RETURN_BUFFER_TOO_SMALL;
+ }
+ ++Entry;
+
+ *NumResults = Entry;
+ return Status;
+}
+
+
+/**
+ A simple array of Boot Option ID's.
+**/
+typedef struct {
+ UINT16 *Data;
+ UINTN Allocated;
+ UINTN Produced;
+} BOOT_ORDER;
+
+
+/**
+
+ Append BootOptionId to BootOrder, reallocating the latter if needed.
+
+ @param[in out] BootOrder The structure pointing to the array and holding
+ allocation and usage counters.
+
+ @param[in] BootOptionId The value to append to the array.
+
+
+ @retval RETURN_SUCCESS BootOptionId appended.
+
+ @retval RETURN_OUT_OF_RESOURCES Memory reallocation failed.
+
+**/
+STATIC
+RETURN_STATUS
+BootOrderAppend (
+ IN OUT BOOT_ORDER *BootOrder,
+ IN UINT16 BootOptionId
+ )
+{
+ if (BootOrder->Produced == BootOrder->Allocated) {
+ UINTN AllocatedNew;
+ UINT16 *DataNew;
+
+ ASSERT (BootOrder->Allocated > 0);
+ AllocatedNew = BootOrder->Allocated * 2;
+ DataNew = ReallocatePool (
+ BootOrder->Allocated * sizeof (*BootOrder->Data),
+ AllocatedNew * sizeof (*DataNew),
+ BootOrder->Data
+ );
+ if (DataNew == NULL) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+ BootOrder->Allocated = AllocatedNew;
+ BootOrder->Data = DataNew;
+ }
+
+ BootOrder->Data[BootOrder->Produced++] = BootOptionId;
+ return RETURN_SUCCESS;
+}
+
+
+/**
+ OpenFirmware device path node
+**/
+typedef struct {
+ SUBSTRING DriverName;
+ SUBSTRING UnitAddress;
+ SUBSTRING DeviceArguments;
+} OFW_NODE;
+
+
+/**
+
+ Parse an OpenFirmware device path node into the caller-allocated OFW_NODE
+ structure, and advance in the input string.
+
+ The node format is mostly parsed after IEEE 1275-1994, 3.2.1.1 "Node names"
+ (a leading slash is expected and not returned):
+
+ /driver-name@unit-address[:device-arguments][<LF>]
+
+ A single trailing <LF> character is consumed but not returned. A trailing
+ <LF> or NUL character terminates the device path.
+
+ The function relies on ASCII encoding.
+
+ @param[in out] Ptr Address of the pointer pointing to the start of the
+ node string. After successful parsing *Ptr is set to
+ the byte immediately following the consumed
+ characters. On error it points to the byte that
+ caused the error. The input string is never modified.
+
+ @param[out] OfwNode The members of this structure point into the input
+ string, designating components of the node.
+ Separators are never included. If "device-arguments"
+ is missing, then DeviceArguments.Ptr is set to NULL.
+ All components that are present have nonzero length.
+
+ If the call doesn't succeed, the contents of this
+ structure is indeterminate.
+
+ @param[out] IsFinal In case of successul parsing, this parameter signals
+ whether the node just parsed is the final node in the
+ device path. The call after a final node will attempt
+ to start parsing the next path. If the call doesn't
+ succeed, then this parameter is not changed.
+
+
+ @retval RETURN_SUCCESS Parsing successful.
+
+ @retval RETURN_NOT_FOUND Parsing terminated. *Ptr was (and is)
+ pointing to an empty string.
+
+ @retval RETURN_INVALID_PARAMETER Parse error.
+
+**/
+STATIC
+RETURN_STATUS
+ParseOfwNode (
+ IN OUT CONST CHAR8 **Ptr,
+ OUT OFW_NODE *OfwNode,
+ OUT BOOLEAN *IsFinal
+ )
+{
+ //
+ // A leading slash is expected. End of string is tolerated.
+ //
+ switch (**Ptr) {
+ case '\0':
+ return RETURN_NOT_FOUND;
+
+ case '/':
+ ++*Ptr;
+ break;
+
+ default:
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ //
+ // driver-name
+ //
+ OfwNode->DriverName.Ptr = *Ptr;
+ OfwNode->DriverName.Len = 0;
+ while (OfwNode->DriverName.Len < 32 &&
+ (IsAlnum (**Ptr) || IsDriverNamePunct (**Ptr))
+ ) {
+ ++*Ptr;
+ ++OfwNode->DriverName.Len;
+ }
+
+ if (OfwNode->DriverName.Len == 0 || OfwNode->DriverName.Len == 32) {
+ return RETURN_INVALID_PARAMETER;
+ }
+
+
+ //
+ // unit-address
+ //
+ if (**Ptr != '@') {
+ return RETURN_INVALID_PARAMETER;
+ }
+ ++*Ptr;
+
+ OfwNode->UnitAddress.Ptr = *Ptr;
+ OfwNode->UnitAddress.Len = 0;
+ while (IsPrintNotDelim (**Ptr)) {
+ ++*Ptr;
+ ++OfwNode->UnitAddress.Len;
+ }
+
+ if (OfwNode->UnitAddress.Len == 0) {
+ return RETURN_INVALID_PARAMETER;
+ }
+
+
+ //
+ // device-arguments, may be omitted
+ //
+ OfwNode->DeviceArguments.Len = 0;
+ if (**Ptr == ':') {
+ ++*Ptr;
+ OfwNode->DeviceArguments.Ptr = *Ptr;
+
+ while (IsPrintNotDelim (**Ptr)) {
+ ++*Ptr;
+ ++OfwNode->DeviceArguments.Len;
+ }
+
+ if (OfwNode->DeviceArguments.Len == 0) {
+ return RETURN_INVALID_PARAMETER;
+ }
+ }
+ else {
+ OfwNode->DeviceArguments.Ptr = NULL;
+ }
+
+ switch (**Ptr) {
+ case '\n':
+ ++*Ptr;
+ //
+ // fall through
+ //
+
+ case '\0':
+ *IsFinal = TRUE;
+ break;
+
+ case '/':
+ *IsFinal = FALSE;
+ break;
+
+ default:
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ DEBUG ((
+ DEBUG_VERBOSE,
+ "%a: DriverName=\"%.*a\" UnitAddress=\"%.*a\" DeviceArguments=\"%.*a\"\n",
+ __FUNCTION__,
+ OfwNode->DriverName.Len, OfwNode->DriverName.Ptr,
+ OfwNode->UnitAddress.Len, OfwNode->UnitAddress.Ptr,
+ OfwNode->DeviceArguments.Len,
+ OfwNode->DeviceArguments.Ptr == NULL ? "" : OfwNode->DeviceArguments.Ptr
+ ));
+ return RETURN_SUCCESS;
+}
+
+
+/**
+
+ Translate an array of OpenFirmware device nodes to a UEFI device path
+ fragment.
+
+ @param[in] OfwNode Array of OpenFirmware device nodes to
+ translate, constituting the beginning of an
+ OpenFirmware device path.
+
+ @param[in] NumNodes Number of elements in OfwNode.
+
+ @param[out] Translated Destination array receiving the UEFI path
+ fragment, allocated by the caller. If the
+ return value differs from RETURN_SUCCESS, its
+ contents is indeterminate.
+
+ @param[in out] TranslatedSize On input, the number of CHAR16's in
+ Translated. On RETURN_SUCCESS this parameter
+ is assigned the number of non-NUL CHAR16's
+ written to Translated. In case of other return
+ values, TranslatedSize is indeterminate.
+
+
+ @retval RETURN_SUCCESS Translation successful.
+
+ @retval RETURN_BUFFER_TOO_SMALL The translation does not fit into the number
+ of bytes provided.
+
+ @retval RETURN_UNSUPPORTED The array of OpenFirmware device nodes can't
+ be translated in the current implementation.
+
+**/
+STATIC
+RETURN_STATUS
+TranslateOfwNodes (
+ IN CONST OFW_NODE *OfwNode,
+ IN UINTN NumNodes,
+ OUT CHAR16 *Translated,
+ IN OUT UINTN *TranslatedSize
+ )
+{
+ UINT32 PciDevFun[2];
+ UINTN NumEntries;
+ UINTN Written;
+
+ //
+ // Get PCI device and optional PCI function. Assume a single PCI root.
+ //
+ if (NumNodes < FIXED_OFW_NODES ||
+ !SubstringEq (OfwNode[0].DriverName, "pci")
+ ) {
+ return RETURN_UNSUPPORTED;
+ }
+ PciDevFun[1] = 0;
+ NumEntries = sizeof (PciDevFun) / sizeof (PciDevFun[0]);
+ if (ParseUnitAddressHexList (
+ OfwNode[1].UnitAddress,
+ PciDevFun,
+ &NumEntries
+ ) != RETURN_SUCCESS
+ ) {
+ return RETURN_UNSUPPORTED;
+ }
+
+ if (SubstringEq (OfwNode[1].DriverName, "ide") &&
+ SubstringEq (OfwNode[2].DriverName, "drive") &&
+ SubstringEq (OfwNode[3].DriverName, "disk")
+ ) {
+ //
+ // OpenFirmware device path (IDE disk, IDE CD-ROM):
+ //
+ // /pci@i0cf8/ide@1,1/drive@0/disk@0
+ // ^ ^ ^ ^ ^
+ // | | | | master or slave
+ // | | | primary or secondary
+ // | PCI slot & function holding IDE controller
+ // PCI root at system bus port, PIO
+ //
+ // UEFI device path:
+ //
+ // PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)
+ // ^
+ // fixed LUN
+ //
+ UINT32 Secondary;
+ UINT32 Slave;
+
+ NumEntries = 1;
+ if (ParseUnitAddressHexList (
+ OfwNode[2].UnitAddress,
+ &Secondary,
+ &NumEntries
+ ) != RETURN_SUCCESS ||
+ Secondary > 1 ||
+ ParseUnitAddressHexList (
+ OfwNode[3].UnitAddress,
+ &Slave,
+ &NumEntries // reuse after previous single-element call
+ ) != RETURN_SUCCESS ||
+ Slave > 1
+ ) {
+ return RETURN_UNSUPPORTED;
+ }
+
+ Written = UnicodeSPrintAsciiFormat (
+ Translated,
+ *TranslatedSize * sizeof (*Translated), // BufferSize in bytes
+ "PciRoot(0x0)/Pci(0x%x,0x%x)/Ata(%a,%a,0x0)",
+ PciDevFun[0],
+ PciDevFun[1],
+ Secondary ? "Secondary" : "Primary",
+ Slave ? "Slave" : "Master"
+ );
+ } else if (SubstringEq (OfwNode[1].DriverName, "isa") &&
+ SubstringEq (OfwNode[2].DriverName, "fdc") &&
+ SubstringEq (OfwNode[3].DriverName, "floppy")
+ ) {
+ //
+ // OpenFirmware device path (floppy disk):
+ //
+ // /pci@i0cf8/isa@1/fdc@03f0/floppy@0
+ // ^ ^ ^ ^
+ // | | | A: or B:
+ // | | ISA controller io-port (hex)
+ // | PCI slot holding ISA controller
+ // PCI root at system bus port, PIO
+ //
+ // UEFI device path:
+ //
+ // PciRoot(0x0)/Pci(0x1,0x0)/Floppy(0x0)
+ // ^
+ // ACPI UID
+ //
+ UINT32 AcpiUid;
+
+ NumEntries = 1;
+ if (ParseUnitAddressHexList (
+ OfwNode[3].UnitAddress,
+ &AcpiUid,
+ &NumEntries
+ ) != RETURN_SUCCESS ||
+ AcpiUid > 1
+ ) {
+ return RETURN_UNSUPPORTED;
+ }
+
+ Written = UnicodeSPrintAsciiFormat (
+ Translated,
+ *TranslatedSize * sizeof (*Translated), // BufferSize in bytes
+ "PciRoot(0x0)/Pci(0x%x,0x%x)/Floppy(0x%x)",
+ PciDevFun[0],
+ PciDevFun[1],
+ AcpiUid
+ );
+ } else {
+ return RETURN_UNSUPPORTED;
+ }
+
+ //
+ // There's no way to differentiate between "completely used up without
+ // truncation" and "truncated", so treat the former as the latter, and return
+ // success only for "some room left unused".
+ //
+ if (Written + 1 < *TranslatedSize) {
+ *TranslatedSize = Written;
+ return RETURN_SUCCESS;
+ }
+
+ return RETURN_BUFFER_TOO_SMALL;
+}
+
+
+/**
+
+ Translate an OpenFirmware device path fragment to a UEFI device path
+ fragment, and advance in the input string.
+
+ @param[in out] Ptr Address of the pointer pointing to the start
+ of the path string. After successful
+ translation (RETURN_SUCCESS) or at least
+ successful parsing (RETURN_UNSUPPORTED,
+ RETURN_BUFFER_TOO_SMALL), *Ptr is set to the
+ byte immediately following the consumed
+ characters. In other error cases, it points to
+ the byte that caused the error.
+
+ @param[out] Translated Destination array receiving the UEFI path
+ fragment, allocated by the caller. If the
+ return value differs from RETURN_SUCCESS, its
+ contents is indeterminate.
+
+ @param[in out] TranslatedSize On input, the number of CHAR16's in
+ Translated. On RETURN_SUCCESS this parameter
+ is assigned the number of non-NUL CHAR16's
+ written to Translated. In case of other return
+ values, TranslatedSize is indeterminate.
+
+
+ @retval RETURN_SUCCESS Translation successful.
+
+ @retval RETURN_BUFFER_TOO_SMALL The OpenFirmware device path was parsed
+ successfully, but its translation did not
+ fit into the number of bytes provided.
+ Further calls to this function are
+ possible.
+
+ @retval RETURN_UNSUPPORTED The OpenFirmware device path was parsed
+ successfully, but it can't be translated in
+ the current implementation. Further calls
+ to this function are possible.
+
+ @retval RETURN_NOT_FOUND Translation terminated, *Ptr was (and is)
+ pointing to an empty string.
+
+ @retval RETURN_INVALID_PARAMETER Parse error. This is a permanent error.
+
+**/
+STATIC
+RETURN_STATUS
+TranslateOfwPath (
+ IN OUT CONST CHAR8 **Ptr,
+ OUT CHAR16 *Translated,
+ IN OUT UINTN *TranslatedSize
+ )
+{
+ UINTN NumNodes;
+ RETURN_STATUS Status;
+ OFW_NODE Node[FIXED_OFW_NODES];
+ BOOLEAN IsFinal;
+ OFW_NODE Skip;
+
+ NumNodes = 0;
+ Status = ParseOfwNode (Ptr, &Node[NumNodes], &IsFinal);
+
+ if (Status == RETURN_NOT_FOUND) {
+ DEBUG ((DEBUG_VERBOSE, "%a: no more nodes\n", __FUNCTION__));
+ return RETURN_NOT_FOUND;
+ }
+
+ while (Status == RETURN_SUCCESS && !IsFinal) {
+ ++NumNodes;
+ Status = ParseOfwNode (
+ Ptr,
+ (NumNodes < FIXED_OFW_NODES) ? &Node[NumNodes] : &Skip,
+ &IsFinal
+ );
+ }
+
+ switch (Status) {
+ case RETURN_SUCCESS:
+ ++NumNodes;
+ break;
+
+ case RETURN_INVALID_PARAMETER:
+ DEBUG ((DEBUG_VERBOSE, "%a: parse error\n", __FUNCTION__));
+ return RETURN_INVALID_PARAMETER;
+
+ default:
+ ASSERT (0);
+ }
+
+ Status = TranslateOfwNodes (
+ Node,
+ NumNodes < FIXED_OFW_NODES ? NumNodes : FIXED_OFW_NODES,
+ Translated,
+ TranslatedSize);
+ switch (Status) {
+ case RETURN_SUCCESS:
+ DEBUG ((DEBUG_VERBOSE, "%a: success: \"%s\"\n", __FUNCTION__, Translated));
+ break;
+
+ case RETURN_BUFFER_TOO_SMALL:
+ DEBUG ((DEBUG_VERBOSE, "%a: buffer too small\n", __FUNCTION__));
+ break;
+
+ case RETURN_UNSUPPORTED:
+ DEBUG ((DEBUG_VERBOSE, "%a: unsupported\n", __FUNCTION__));
+ break;
+
+ default:
+ ASSERT (0);
+ }
+ return Status;
+}
+
+
+/**
+
+ Convert the UEFI DevicePath to full text representation with DevPathToText,
+ then match the UEFI device path fragment in Translated against it.
+
+ @param[in] Translated UEFI device path fragment, translated from
+ OpenFirmware format, to search for.
+
+ @param[in] TranslatedLength The length of Translated in CHAR16's.
+
+ @param[in] DevicePath Boot option device path whose textual rendering
+ to search in.
+
+ @param[in] DevPathToText Binary-to-text conversion protocol for DevicePath.
+
+
+ @retval TRUE If Translated was found at the beginning of DevicePath after
+ converting the latter to text.
+
+ @retval FALSE If DevicePath was NULL, or it could not be converted, or there
+ was no match.
+
+**/
+STATIC
+BOOLEAN
+Match (
+ IN CONST CHAR16 *Translated,
+ IN UINTN TranslatedLength,
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ IN CONST EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *DevPathToText
+ )
+{
+ CHAR16 *Converted;
+ BOOLEAN Result;
+
+ Converted = DevPathToText->ConvertDevicePathToText (
+ DevicePath,
+ FALSE, // DisplayOnly
+ FALSE // AllowShortcuts
+ );
+ if (Converted == NULL) {
+ return FALSE;
+ }
+
+ //
+ // Is Translated a prefix of Converted?
+ //
+ Result = (StrnCmp (Converted, Translated, TranslatedLength) == 0);
+ DEBUG ((
+ DEBUG_VERBOSE,
+ "%a: against \"%s\": %a\n",
+ __FUNCTION__,
+ Converted,
+ Result ? "match" : "no match"
+ ));
+ FreePool (Converted);
+ return Result;
+}
+
+
+/**
+
+ Set the boot order based on configuration retrieved from QEMU.
+
+ Attempt to retrieve the "bootorder" fw_cfg file from QEMU. Translate the
+ OpenFirmware device paths therein to UEFI device path fragments. Match the
+ translated fragments against BootOptionList, and rewrite the BootOrder NvVar
+ so that it corresponds to the order described in fw_cfg.
+
+ @param[in] BootOptionList A boot option list, created with
+ BdsLibEnumerateAllBootOption ().
+
+
+ @retval RETURN_SUCCESS BootOrder NvVar rewritten.
+
+ @retval RETURN_UNSUPPORTED QEMU's fw_cfg is not supported.
+
+ @retval RETURN_NOT_FOUND Empty or nonexistent "bootorder" fw_cfg
+ file, or no match found between the
+ "bootorder" fw_cfg file and BootOptionList.
+
+ @retval RETURN_INVALID_PARAMETER Parse error in the "bootorder" fw_cfg file.
+
+ @retval RETURN_OUT_OF_RESOURCES Memory allocation failed.
+
+ @return Values returned by gBS->LocateProtocol ()
+ or gRT->SetVariable ().
+
+**/
+RETURN_STATUS
+SetBootOrderFromQemu (
+ IN CONST LIST_ENTRY *BootOptionList
+ )
+{
+ RETURN_STATUS Status;
+
+ EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *DevPathToText;
+
+ FIRMWARE_CONFIG_ITEM FwCfgItem;
+ UINTN FwCfgSize;
+ CHAR8 *FwCfg;
+ CONST CHAR8 *FwCfgPtr;
+
+ BOOT_ORDER BootOrder;
+
+ UINTN TranslatedSize;
+ CHAR16 Translated[TRANSLATION_OUTPUT_SIZE];
+
+ Status = gBS->LocateProtocol (
+ &gEfiDevicePathToTextProtocolGuid,
+ NULL, // optional registration key
+ (VOID **) &DevPathToText
+ );
+ if (Status != EFI_SUCCESS) {
+ return Status;
+ }
+
+ Status = QemuFwCfgFindFile ("bootorder", &FwCfgItem, &FwCfgSize);
+ if (Status != RETURN_SUCCESS) {
+ return Status;
+ }
+
+ if (FwCfgSize == 0) {
+ return RETURN_NOT_FOUND;
+ }
+
+ FwCfg = AllocatePool (FwCfgSize);
+ if (FwCfg == NULL) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ QemuFwCfgSelectItem (FwCfgItem);
+ QemuFwCfgReadBytes (FwCfgSize, FwCfg);
+ if (FwCfg[FwCfgSize - 1] != '\0') {
+ Status = RETURN_INVALID_PARAMETER;
+ goto ErrorFreeFwCfg;
+ }
+
+ DEBUG ((DEBUG_VERBOSE, "%a: FwCfg:\n", __FUNCTION__));
+ DEBUG ((DEBUG_VERBOSE, "%a\n", FwCfg));
+ DEBUG ((DEBUG_VERBOSE, "%a: FwCfg: <end>\n", __FUNCTION__));
+ FwCfgPtr = FwCfg;
+
+ BootOrder.Produced = 0;
+ BootOrder.Allocated = 1;
+ BootOrder.Data = AllocatePool (
+ BootOrder.Allocated * sizeof (*BootOrder.Data)
+ );
+ if (BootOrder.Data == NULL) {
+ Status = RETURN_OUT_OF_RESOURCES;
+ goto ErrorFreeFwCfg;
+ }
+
+ //
+ // translate each OpenFirmware path
+ //
+ TranslatedSize = sizeof (Translated) / sizeof (Translated[0]);
+ Status = TranslateOfwPath (&FwCfgPtr, Translated, &TranslatedSize);
+ while (Status == RETURN_SUCCESS ||
+ Status == RETURN_UNSUPPORTED ||
+ Status == RETURN_BUFFER_TOO_SMALL) {
+ if (Status == RETURN_SUCCESS) {
+ CONST LIST_ENTRY *Link;
+
+ //
+ // match translated OpenFirmware path against all enumerated boot options
+ //
+ for (Link = BootOptionList->ForwardLink; Link != BootOptionList;
+ Link = Link->ForwardLink) {
+ CONST BDS_COMMON_OPTION *BootOption;
+
+ BootOption = CR (
+ Link,
+ BDS_COMMON_OPTION,
+ Link,
+ BDS_LOAD_OPTION_SIGNATURE
+ );
+ if (IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE) &&
+ Match (
+ Translated,
+ TranslatedSize, // contains length, not size, in CHAR16's here
+ BootOption->DevicePath,
+ DevPathToText
+ )
+ ) {
+ //
+ // match found, store ID and continue with next OpenFirmware path
+ //
+ Status = BootOrderAppend (&BootOrder, BootOption->BootCurrent);
+ if (Status != RETURN_SUCCESS) {
+ goto ErrorFreeBootOrder;
+ }
+ break;
+ }
+ } // scanned all enumerated boot options
+ } // translation successful
+
+ TranslatedSize = sizeof (Translated) / sizeof (Translated[0]);
+ Status = TranslateOfwPath (&FwCfgPtr, Translated, &TranslatedSize);
+ } // scanning of OpenFirmware paths done
+
+ if (Status == RETURN_NOT_FOUND && BootOrder.Produced > 0) {
+ //
+ // No more OpenFirmware paths, some matches found: rewrite BootOrder NvVar.
+ // See Table 10 in the UEFI Spec 2.3.1 with Errata C for the required
+ // attributes.
+ //
+ Status = gRT->SetVariable (
+ L"BootOrder",
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS,
+ BootOrder.Produced * sizeof (*BootOrder.Data),
+ BootOrder.Data
+ );
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: setting BootOrder: %a\n",
+ __FUNCTION__,
+ Status == EFI_SUCCESS ? "success" : "error"
+ ));
+ }
+
+ErrorFreeBootOrder:
+ FreePool (BootOrder.Data);
+
+ErrorFreeFwCfg:
+ FreePool (FwCfg);
+
+ return Status;
+}
diff --git a/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.h b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.h new file mode 100644 index 0000000000..8d4ca2b111 --- /dev/null +++ b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.h @@ -0,0 +1,53 @@ +/** @file
+ Rewrite the BootOrder NvVar based on QEMU's "bootorder" fw_cfg file --
+ include file.
+
+ Copyright (C) 2012, Red Hat, Inc.
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+
+#include <Uefi/UefiBaseType.h>
+#include <Base.h>
+
+
+/**
+
+ Set the boot order based on configuration retrieved from QEMU.
+
+ Attempt to retrieve the "bootorder" fw_cfg file from QEMU. Translate the
+ OpenFirmware device paths therein to UEFI device path fragments. Match the
+ translated fragments against BootOptionList, and rewrite the BootOrder NvVar
+ so that it corresponds to the order described in fw_cfg.
+
+ @param[in] BootOptionList A boot option list, created with
+ BdsLibEnumerateAllBootOption ().
+
+
+ @retval RETURN_SUCCESS BootOrder NvVar rewritten.
+
+ @retval RETURN_UNSUPPORTED QEMU's fw_cfg is not supported.
+
+ @retval RETURN_NOT_FOUND Empty or nonexistent "bootorder" fw_cfg
+ file, or no match found between the
+ "bootorder" fw_cfg file and BootOptionList.
+
+ @retval RETURN_INVALID_PARAMETER Parse error in the "bootorder" fw_cfg file.
+
+ @retval RETURN_OUT_OF_RESOURCES Memory allocation failed.
+
+ @return Values returned by gBS->LocateProtocol ()
+ or gRT->SetVariable ().
+
+**/
+RETURN_STATUS
+SetBootOrderFromQemu (
+ IN CONST LIST_ENTRY *BootOptionList
+ );
|