Xen.c File Reference

#include <PiPei.h>
#include <Library/BaseMemoryLib.h>
#include <Library/CpuLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/LocalApicLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/SafeIntLib.h>
#include <Guid/XenInfo.h>
#include <IndustryStandard/E820.h>
#include <Library/ResourcePublicationLib.h>
#include <Library/MtrrLib.h>
#include <IndustryStandard/PageTable.h>
#include <IndustryStandard/Xen/arch-x86/hvm/start_info.h>
#include <Library/XenHypercallLib.h>
#include <IndustryStandard/Xen/memory.h>
#include "Platform.h"
#include "Xen.h"

Go to the source code of this file.

Functions
EFI_STATUS	XenGetE820Map (EFI_E820_ENTRY64 **Entries, UINT32 *Count)
EFI_STATUS	XenConnect ()
BOOLEAN	XenDetect (VOID)
BOOLEAN	XenHvmloaderDetected (VOID)
BOOLEAN	XenPvhDetected (VOID)
VOID	XenPublishRamRegions (VOID)
EFI_STATUS	PhysicalAddressIdentityMapping (IN EFI_PHYSICAL_ADDRESS AddressToMap)
STATIC EFI_STATUS	MapSharedInfoPage (IN VOID *PagePtr)
STATIC VOID	UnmapXenPage (IN VOID *PagePtr)
STATIC UINT64	GetCpuFreq (IN XEN_VCPU_TIME_INFO *VcpuTime)
STATIC VOID	XenDelay (IN XEN_VCPU_TIME_INFO *VcpuTimeInfo, IN UINT64 DelayNs)
VOID	CalibrateLapicTimer (VOID)

Variables
STATIC UINT32	mXenLeaf = 0
EFI_XEN_INFO	mXenInfo
EFI_XEN_OVMF_INFO *	mXenHvmloaderInfo
STATIC EFI_E820_ENTRY64	mE820Entries [128]
STATIC UINT32	mE820EntriesCount

Detailed Description

Xen Platform PEI support

Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.
Copyright (c) 2011, Andrei Warkentin andre.nosp@m.iw@m.nosp@m.otoro.nosp@m.la.c.nosp@m.om Copyright (c) 2019, Citrix Systems, Inc.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Xen.c.

Function Documentation

CalibrateLapicTimer()

VOID CalibrateLapicTimer

(

VOID

)

Calculate the frequency of the Local Apic Timer

Definition at line 553 of file Xen.c.

GetCpuFreq()

STATIC UINT64 GetCpuFreq

(

IN XEN_VCPU_TIME_INFO *

VcpuTime

)

Definition at line 472 of file Xen.c.

MapSharedInfoPage()

STATIC EFI_STATUS MapSharedInfoPage

(

IN VOID *

PagePtr

)

Definition at line 436 of file Xen.c.

PhysicalAddressIdentityMapping()

EFI_STATUS PhysicalAddressIdentityMapping

(

IN EFI_PHYSICAL_ADDRESS

AddressToMap

)

Definition at line 367 of file Xen.c.

UnmapXenPage()

STATIC VOID UnmapXenPage

(

IN VOID *

PagePtr

)

Definition at line 457 of file Xen.c.

XenConnect()

EFI_STATUS XenConnect

(

)

Connects to the Hypervisor.

Returns

EFI_STATUS

Definition at line 128 of file Xen.c.

XenDelay()

STATIC VOID XenDelay	(	IN XEN_VCPU_TIME_INFO *	VcpuTimeInfo,
		IN UINT64	DelayNs
	)

Definition at line 501 of file Xen.c.

XenDetect()

BOOLEAN XenDetect

(

VOID

)

Figures out if we are running inside Xen HVM.

Return values

TRUE	Xen was detected
FALSE	Xen was not detected

Definition at line 220 of file Xen.c.

XenGetE820Map()

EFI_STATUS XenGetE820Map	(	EFI_E820_ENTRY64 **	Entries,
		UINT32 *	Count
	)

Returns E820 map provided by Xen

Parameters

Entries	Pointer to E820 map
Count	Number of entries

Returns

EFI_STATUS

Definition at line 61 of file Xen.c.

XenHvmloaderDetected()

BOOLEAN XenHvmloaderDetected

(

VOID

)

Definition at line 250 of file Xen.c.

XenPublishRamRegions()

VOID XenPublishRamRegions

(

VOID

)

Definition at line 271 of file Xen.c.

XenPvhDetected()

BOOLEAN XenPvhDetected

(

VOID

)

This function detect if OVMF have started via the PVH entry point.

Return values

TRUE	PVH entry point as been used
FALSE	OVMF have started via the HVM route

Definition at line 258 of file Xen.c.

Variable Documentation

mE820Entries

STATIC EFI_E820_ENTRY64 mE820Entries[128]

Definition at line 49 of file Xen.c.

mE820EntriesCount

STATIC UINT32 mE820EntriesCount

Definition at line 50 of file Xen.c.

mXenHvmloaderInfo

EFI_XEN_OVMF_INFO* mXenHvmloaderInfo

Definition at line 48 of file Xen.c.

mXenInfo

EFI_XEN_INFO mXenInfo

Definition at line 42 of file Xen.c.

mXenLeaf

STATIC UINT32 mXenLeaf = 0

Definition at line 40 of file Xen.c.