sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

OvmfPkg: CloudHv: Retrieve RSDP address from PVH

Browse Source 
Instead of hardcoding the address of the RSDP in the firmware, let's
rely on the PVH structure hvm_start_info to retrieve this information.

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Sebastien Boeuf
2022-03-02 21:31:35 +08:00
committed by mergify[bot]
parent e1c7f9b4e5
commit d50d9e5549
4 changed files with 32 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c
View File

@@ -7,9 +7,11 @@
**/
#include <IndustryStandard/CloudHv.h> // CLOUDHV_RSDP_ADDRESS
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h> // DEBUG()
#include <IndustryStandard/CloudHv.h> // CLOUDHV_RSDP_ADDRESS
#include <IndustryStandard/Xen/arch-x86/hvm/start_info.h> // hvm_start_info
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h> // DEBUG()
#include <Library/PcdLib.h> // PcdGet32()
#include "AcpiPlatform.h"
@@ -23,20 +25,33 @@ InstallCloudHvTables (
EFI_STATUS Status;
UINTN TableHandle;
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_DESCRIPTION_HEADER *DsdtTable;
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_DESCRIPTION_HEADER *DsdtTable;
EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *AcpiRsdpStructurePtr;
UINT32 *PVHResetVectorData;
struct hvm_start_info *pvh_start_info;
Fadt2Table = NULL;
DsdtTable = NULL;
TableHandle = 0;
NumberOfTableEntries = 0;
EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *AcpiRsdpStructurePtr = (VOID *)CLOUDHV_RSDP_ADDRESS;
AcpiRsdpStructurePtr = NULL;
PVHResetVectorData = NULL;
pvh_start_info = NULL;
PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);
if (PVHResetVectorData == 0) {
return EFI_NOT_FOUND;
}
pvh_start_info = (struct hvm_start_info *)(UINTN)PVHResetVectorData[0];
AcpiRsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)(UINTN)pvh_start_info->rsdp_paddr;
// If XSDT table is found, just install its tables.
// Otherwise, try to find and install the RSDT tables.