diff options
Diffstat (limited to 'OvmfPkg/XenAcpiPlatformDxe/Xen.c')
| -rw-r--r-- | OvmfPkg/XenAcpiPlatformDxe/Xen.c | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/OvmfPkg/XenAcpiPlatformDxe/Xen.c b/OvmfPkg/XenAcpiPlatformDxe/Xen.c new file mode 100644 index 0000000000..e8395db548 --- /dev/null +++ b/OvmfPkg/XenAcpiPlatformDxe/Xen.c @@ -0,0 +1,316 @@ +/** @file
+ OVMF ACPI Xen support
+
+ Copyright (C) 2021, Red Hat, Inc.
+ Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2012, Bei Guan <gbtju85@gmail.com>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h> // CpuDeadLoop()
+#include <Library/DebugLib.h> // DEBUG()
+#include <Library/XenPlatformLib.h> // XenGetInfoHOB()
+
+#include "AcpiPlatform.h"
+
+#define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020
+#define XEN_BIOS_PHYSICAL_END 0x000FFFFF
+
+EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr = NULL;
+
+/**
+ Get the address of Xen ACPI Root System Description Pointer (RSDP)
+ structure.
+
+ @param RsdpStructurePtr Return pointer to RSDP structure
+
+ @return EFI_SUCCESS Find Xen RSDP structure successfully.
+ @return EFI_NOT_FOUND Don't find Xen RSDP structure.
+ @return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.
+
+**/
+EFI_STATUS
+EFIAPI
+GetXenAcpiRsdp (
+ OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr
+ )
+{
+ EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;
+ UINT8 *XenAcpiPtr;
+ UINT8 Sum;
+ EFI_XEN_INFO *XenInfo;
+
+ //
+ // Detect the RSDP structure
+ //
+
+ //
+ // First look for PVH one
+ //
+ XenInfo = XenGetInfoHOB ();
+ ASSERT (XenInfo != NULL);
+ if (XenInfo->RsdpPvh != NULL) {
+ DEBUG ((DEBUG_INFO, "%a: Use ACPI RSDP table at 0x%p\n",
+ gEfiCallerBaseName, XenInfo->RsdpPvh));
+ *RsdpPtr = XenInfo->RsdpPvh;
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Otherwise, look for the HVM one
+ //
+ for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS;
+ XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END;
+ XenAcpiPtr += 0x10) {
+
+ RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)
+ (UINTN) XenAcpiPtr;
+
+ if (!AsciiStrnCmp ((CHAR8 *) &RsdpStructurePtr->Signature, "RSD PTR ", 8)) {
+ //
+ // RSDP ACPI 1.0 checksum for 1.0/2.0/3.0 table.
+ // This is only the first 20 bytes of the structure
+ //
+ Sum = CalculateSum8 (
+ (CONST UINT8 *)RsdpStructurePtr,
+ sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER)
+ );
+ if (Sum != 0) {
+ return EFI_ABORTED;
+ }
+
+ if (RsdpStructurePtr->Revision >= 2) {
+ //
+ // RSDP ACPI 2.0/3.0 checksum, this is the entire table
+ //
+ Sum = CalculateSum8 (
+ (CONST UINT8 *)RsdpStructurePtr,
+ sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER)
+ );
+ if (Sum != 0) {
+ return EFI_ABORTED;
+ }
+ }
+ *RsdpPtr = RsdpStructurePtr;
+ return EFI_SUCCESS;
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+/**
+ Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables
+ into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed
+ ACPI tables are: FACP, APIC, HPET, WAET, SSDT, FACS, DSDT.
+
+ @param AcpiProtocol Protocol instance pointer.
+
+ @return EFI_SUCCESS The table was successfully inserted.
+ @return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is
+ NULL, or AcpiTableBufferSize and the size
+ field embedded in the ACPI table pointed to
+ by AcpiTableBuffer are not in sync.
+ @return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.
+
+**/
+EFI_STATUS
+EFIAPI
+InstallXenTables (
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
+ )
+{
+ EFI_STATUS Status;
+ UINTN TableHandle;
+
+ EFI_ACPI_DESCRIPTION_HEADER *Rsdt;
+ EFI_ACPI_DESCRIPTION_HEADER *Xsdt;
+ VOID *CurrentTableEntry;
+ UINTN CurrentTablePointer;
+ EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;
+ UINTN Index;
+ UINTN NumberOfTableEntries;
+ EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;
+ EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt1Table;
+ EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs2Table;
+ EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs1Table;
+ EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;
+
+ Fadt2Table = NULL;
+ Fadt1Table = NULL;
+ Facs2Table = NULL;
+ Facs1Table = NULL;
+ DsdtTable = NULL;
+ TableHandle = 0;
+ NumberOfTableEntries = 0;
+
+ //
+ // Try to find Xen ACPI tables
+ //
+ Status = GetXenAcpiRsdp (&XenAcpiRsdpStructurePtr);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // If XSDT table is find, just install its tables.
+ // Otherwise, try to find and install the RSDT tables.
+ //
+ if (XenAcpiRsdpStructurePtr->XsdtAddress) {
+ //
+ // Retrieve the addresses of XSDT and
+ // calculate the number of its table entries.
+ //
+ Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)
+ XenAcpiRsdpStructurePtr->XsdtAddress;
+ NumberOfTableEntries = (Xsdt->Length -
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /
+ sizeof (UINT64);
+
+ //
+ // Install ACPI tables found in XSDT.
+ //
+ for (Index = 0; Index < NumberOfTableEntries; Index++) {
+ //
+ // Get the table entry from XSDT
+ //
+ CurrentTableEntry = (VOID *) ((UINT8 *) Xsdt +
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
+ Index * sizeof (UINT64));
+ CurrentTablePointer = (UINTN) *(UINT64 *)CurrentTableEntry;
+ CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;
+
+ //
+ // Install the XSDT tables
+ //
+ Status = InstallAcpiTable (
+ AcpiProtocol,
+ CurrentTable,
+ CurrentTable->Length,
+ &TableHandle
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Get the FACS and DSDT table address from the table FADT
+ //
+ if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {
+ Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)
+ (UINTN) CurrentTablePointer;
+ Facs2Table = (EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)
+ (UINTN) Fadt2Table->FirmwareCtrl;
+ DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt2Table->Dsdt;
+ }
+ }
+ }
+ else if (XenAcpiRsdpStructurePtr->RsdtAddress) {
+ //
+ // Retrieve the addresses of RSDT and
+ // calculate the number of its table entries.
+ //
+ Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)
+ XenAcpiRsdpStructurePtr->RsdtAddress;
+ NumberOfTableEntries = (Rsdt->Length -
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /
+ sizeof (UINT32);
+
+ //
+ // Install ACPI tables found in XSDT.
+ //
+ for (Index = 0; Index < NumberOfTableEntries; Index++) {
+ //
+ // Get the table entry from RSDT
+ //
+ CurrentTableEntry = (UINT32 *) ((UINT8 *) Rsdt +
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
+ Index * sizeof (UINT32));
+ CurrentTablePointer = *(UINT32 *)CurrentTableEntry;
+ CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;
+
+ //
+ // Install the RSDT tables
+ //
+ Status = InstallAcpiTable (
+ AcpiProtocol,
+ CurrentTable,
+ CurrentTable->Length,
+ &TableHandle
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Get the FACS and DSDT table address from the table FADT
+ //
+ if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {
+ Fadt1Table = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *)
+ (UINTN) CurrentTablePointer;
+ Facs1Table = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)
+ (UINTN) Fadt1Table->FirmwareCtrl;
+ DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt1Table->Dsdt;
+ }
+ }
+ }
+
+ //
+ // Install the FACS table.
+ //
+ if (Fadt2Table) {
+ //
+ // FACS 2.0
+ //
+ Status = InstallAcpiTable (
+ AcpiProtocol,
+ Facs2Table,
+ Facs2Table->Length,
+ &TableHandle
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+ else if (Fadt1Table) {
+ //
+ // FACS 1.0
+ //
+ Status = InstallAcpiTable (
+ AcpiProtocol,
+ Facs1Table,
+ Facs1Table->Length,
+ &TableHandle
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ //
+ // Install DSDT table. If we reached this point without finding the DSDT,
+ // then we're out of sync with the hypervisor, and cannot continue.
+ //
+ if (DsdtTable == NULL) {
+ DEBUG ((DEBUG_ERROR, "%a: no DSDT found\n", __FUNCTION__));
+ ASSERT (FALSE);
+ CpuDeadLoop ();
+ }
+
+ Status = InstallAcpiTable (
+ AcpiProtocol,
+ DsdtTable,
+ DsdtTable->Length,
+ &TableHandle
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
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