df73df138d
Ultimately, each QEMU_LOADER_WRITE_POINTER command creates a guest memory reference in some QEMU device. When the virtual machine is reset, the device willfully forgets the guest address, since the guest memory is wholly invalidated during platform reset. ... Unless the reset is part of S3 resume. Then the guest memory is preserved intact, and the firmware must reprogram those devices with the original guest memory allocation addresses. This patch accumulates the fw_cfg select, skip and write operations of ProcessCmdWritePointer() in a validated / condensed form, and turns them into an ACPI S3 Boot Script fragment at the very end of InstallQemuFwCfgTables(). Cc: Jordan Justen <jordan.l.justen@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=359 Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/** @file
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Sample ACPI Platform Driver
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Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _ACPI_PLATFORM_H_INCLUDED_
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#define _ACPI_PLATFORM_H_INCLUDED_
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#include <PiDxe.h>
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#include <Protocol/AcpiTable.h>
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#include <Protocol/FirmwareVolume2.h>
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#include <Protocol/PciIo.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <IndustryStandard/Acpi.h>
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typedef struct {
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EFI_PCI_IO_PROTOCOL *PciIo;
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UINT64 PciAttributes;
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} ORIGINAL_ATTRIBUTES;
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typedef struct S3_CONTEXT S3_CONTEXT;
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EFI_STATUS
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EFIAPI
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InstallAcpiTable (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
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IN VOID *AcpiTableBuffer,
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IN UINTN AcpiTableBufferSize,
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OUT UINTN *TableKey
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);
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BOOLEAN
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QemuDetected (
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VOID
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);
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EFI_STATUS
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EFIAPI
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QemuInstallAcpiTable (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
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IN VOID *AcpiTableBuffer,
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IN UINTN AcpiTableBufferSize,
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OUT UINTN *TableKey
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);
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BOOLEAN
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XenDetected (
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VOID
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);
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EFI_STATUS
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EFIAPI
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InstallXenTables (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
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);
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EFI_STATUS
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EFIAPI
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InstallQemuFwCfgTables (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
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);
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EFI_STATUS
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EFIAPI
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InstallAcpiTables (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
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);
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VOID
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EnablePciDecoding (
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OUT ORIGINAL_ATTRIBUTES **OriginalAttributes,
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OUT UINTN *Count
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);
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VOID
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RestorePciDecoding (
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IN ORIGINAL_ATTRIBUTES *OriginalAttributes,
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IN UINTN Count
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);
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EFI_STATUS
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AllocateS3Context (
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OUT S3_CONTEXT **S3Context,
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IN UINTN WritePointerCount
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);
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VOID
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ReleaseS3Context (
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IN S3_CONTEXT *S3Context
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);
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EFI_STATUS
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SaveCondensedWritePointerToS3Context (
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IN OUT S3_CONTEXT *S3Context,
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IN UINT16 PointerItem,
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IN UINT8 PointerSize,
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IN UINT32 PointerOffset,
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IN UINT64 PointerValue
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);
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EFI_STATUS
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TransferS3ContextToBootScript (
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IN CONST S3_CONTEXT *S3Context
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);
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#endif
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