mirror of https://github.com/acidanthera/audk.git
OvmfPkg: Add TdxMailboxLib
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 In Tdx BSP may issues commands to APs for some task, for example, to accept pages paralelly. BSP also need to wait until all the APs have done the task. TdxMailboxLib wraps these common funtions for BSP. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com>
This commit is contained in:
Min Xu
mergify[bot]
parent
352eabdcd5
commit
6a608255bb
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/** @file
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Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef TDX_MAILBOX_LIB_H_
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#define TDX_MAILBOX_LIB_H_
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#include <Library/BaseLib.h>
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#include <Uefi/UefiBaseType.h>
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#include <Uefi/UefiSpec.h>
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#include <Pi/PiPeiCis.h>
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#include <Library/DebugLib.h>
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#include <Protocol/DebugSupport.h>
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/**
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This function will be called by BSP to get the CPU number.
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@retval CPU number
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**/
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UINT32
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EFIAPI
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GetCpusNum (
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VOID
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);
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/**
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Get the address of Td mailbox.
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**/
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volatile VOID *
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EFIAPI
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GetTdxMailBox (
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VOID
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);
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/**
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This function will be called by BSP to wakeup APs the are spinning on mailbox
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in protected mode
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@param[in] Command Command to send APs
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@param[in] WakeupVector If used, address for APs to start executing
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@param[in] WakeArgsX Args to pass to APs for excuting commands
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**/
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VOID
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EFIAPI
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MpSendWakeupCommand (
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IN UINT16 Command,
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IN UINT64 WakeupVector,
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IN UINT64 WakeupArgs1,
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IN UINT64 WakeupArgs2,
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IN UINT64 WakeupArgs3,
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IN UINT64 WakeupArgs4
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);
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is started.
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**/
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VOID
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EFIAPI
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MpSerializeStart (
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VOID
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);
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is ended.
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**/
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VOID
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EFIAPI
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MpSerializeEnd (
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VOID
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);
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#endif
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/** @file
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Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/PcdLib.h>
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#include <Library/UefiCpuLib.h>
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#include <Library/SynchronizationLib.h>
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#include <Uefi/UefiBaseType.h>
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#include <Library/TdxLib.h>
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#include <IndustryStandard/IntelTdx.h>
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#include <IndustryStandard/Tdx.h>
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#include <Library/TdxMailboxLib.h>
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volatile VOID *mMailBox = NULL;
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UINT32 mNumOfCpus = 0;
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/**
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This function will be called by BSP to get the CPU number.
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@retval CPU number
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**/
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UINT32
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EFIAPI
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GetCpusNum (
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VOID
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)
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{
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if (mNumOfCpus == 0) {
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mNumOfCpus = TdVCpuNum ();
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}
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return mNumOfCpus;
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}
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/**
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Get the address of Td mailbox.
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**/
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volatile VOID *
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EFIAPI
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GetTdxMailBox (
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VOID
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)
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{
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if (mMailBox == NULL) {
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mMailBox = (VOID *)(UINTN)PcdGet32 (PcdOvmfSecGhcbBackupBase);
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}
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return mMailBox;
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}
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/**
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This function will be called by BSP to wakeup APs the are spinning on mailbox
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in protected mode
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@param[in] Command Command to send APs
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@param[in] WakeupVector If used, address for APs to start executing
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@param[in] WakeArgsX Args to pass to APs for excuting commands
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**/
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VOID
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EFIAPI
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MpSendWakeupCommand (
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IN UINT16 Command,
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IN UINT64 WakeupVector,
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IN UINT64 WakeupArgs1,
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IN UINT64 WakeupArgs2,
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IN UINT64 WakeupArgs3,
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IN UINT64 WakeupArgs4
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)
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{
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volatile MP_WAKEUP_MAILBOX *MailBox;
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MailBox = (volatile MP_WAKEUP_MAILBOX *)GetTdxMailBox ();
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MailBox->ApicId = MP_CPU_PROTECTED_MODE_MAILBOX_APICID_INVALID;
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MailBox->WakeUpVector = 0;
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MailBox->Command = MpProtectedModeWakeupCommandNoop;
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MailBox->ApicId = MP_CPU_PROTECTED_MODE_MAILBOX_APICID_BROADCAST;
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MailBox->WakeUpVector = WakeupVector;
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MailBox->WakeUpArgs1 = WakeupArgs1;
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MailBox->WakeUpArgs2 = WakeupArgs2;
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MailBox->WakeUpArgs3 = WakeupArgs3;
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MailBox->WakeUpArgs4 = WakeupArgs4;
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AsmCpuid (0x01, NULL, NULL, NULL, NULL);
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MailBox->Command = Command;
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AsmCpuid (0x01, NULL, NULL, NULL, NULL);
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return;
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}
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is started.
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**/
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VOID
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EFIAPI
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MpSerializeStart (
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VOID
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)
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{
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volatile MP_WAKEUP_MAILBOX *MailBox;
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UINT32 NumOfCpus;
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NumOfCpus = GetCpusNum ();
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MailBox = (volatile MP_WAKEUP_MAILBOX *)GetTdxMailBox ();
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DEBUG ((DEBUG_VERBOSE, "Waiting for APs to arriving. NumOfCpus=%d, MailBox=%p\n", NumOfCpus, MailBox));
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while (MailBox->NumCpusArriving != (NumOfCpus -1)) {
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CpuPause ();
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}
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DEBUG ((DEBUG_VERBOSE, "Releasing APs\n"));
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MailBox->NumCpusExiting = NumOfCpus;
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InterlockedIncrement ((UINT32 *)&MailBox->NumCpusArriving);
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}
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is ended.
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**/
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VOID
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EFIAPI
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MpSerializeEnd (
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VOID
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)
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{
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volatile MP_WAKEUP_MAILBOX *MailBox;
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MailBox = (volatile MP_WAKEUP_MAILBOX *)GetTdxMailBox ();
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DEBUG ((DEBUG_VERBOSE, "Waiting for APs to finish\n"));
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while (MailBox->NumCpusExiting != 1 ) {
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CpuPause ();
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}
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DEBUG ((DEBUG_VERBOSE, "Restarting APs\n"));
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MailBox->Command = MpProtectedModeWakeupCommandNoop;
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MailBox->NumCpusArriving = 0;
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InterlockedDecrement ((UINT32 *)&MailBox->NumCpusExiting);
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}
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@ -0,0 +1,52 @@
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#/** @file
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#
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# TBD
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#
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# Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
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# Copyright (c) 2008, Apple Inc. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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#
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#**/
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = TdxMailboxLib
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FILE_GUID = 2F81A9BA-748E-4519-BB11-A63A039D561E
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MODULE_TYPE = BASE
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VERSION_STRING = 1.0
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LIBRARY_CLASS = TdxMailboxLib
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#
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# VALID_ARCHITECTURES = X64 IA32
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#
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[Sources.IA32]
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TdxMailboxNull.c
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[Sources.X64]
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TdxMailbox.c
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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UefiCpuPkg/UefiCpuPkg.dec
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OvmfPkg/OvmfPkg.dec
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[LibraryClasses]
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BaseLib
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DebugLib
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BaseMemoryLib
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PcdLib
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UefiCpuLib
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DebugAgentLib
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IoLib
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SynchronizationLib
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MemoryAllocationLib
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[Guids]
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[Pcd]
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gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecGhcbBackupBase
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gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecGhcbBackupSize
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@ -0,0 +1,85 @@
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/** @file
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Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/TdxMailboxLib.h>
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/**
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This function will be called by BSP to get the CPU number.
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@retval CPU number
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**/
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UINT32
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EFIAPI
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GetCpusNum (
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VOID
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)
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{
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ASSERT (FALSE);
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return 0;
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}
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/**
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Get the address of Td mailbox.
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**/
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volatile VOID *
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EFIAPI
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GetTdxMailBox (
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VOID
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)
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{
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ASSERT (FALSE);
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return (volatile VOID *)NULL;
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}
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/**
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This function will be called by BSP to wakeup APs the are spinning on mailbox
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in protected mode
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@param[in] Command Command to send APs
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@param[in] WakeupVector If used, address for APs to start executing
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@param[in] WakeArgsX Args to pass to APs for excuting commands
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**/
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VOID
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EFIAPI
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MpSendWakeupCommand (
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IN UINT16 Command,
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IN UINT64 WakeupVector,
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IN UINT64 WakeupArgs1,
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IN UINT64 WakeupArgs2,
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IN UINT64 WakeupArgs3,
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IN UINT64 WakeupArgs4
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)
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{
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ASSERT (FALSE);
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}
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is started.
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**/
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VOID
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EFIAPI
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MpSerializeStart (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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/**
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BSP wait until all the APs arriving. It means the task triggered by BSP is ended.
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**/
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VOID
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EFIAPI
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MpSerializeEnd (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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@ -109,6 +109,10 @@
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#
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XenPlatformLib|Include/Library/XenPlatformLib.h
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## @libraryclass TdxMailboxLib
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#
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TdxMailboxLib|Include/Library/TdxMailboxLib.h
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[Guids]
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gUefiOvmfPkgTokenSpaceGuid = {0x93bb96af, 0xb9f2, 0x4eb8, {0x94, 0x62, 0xe0, 0xba, 0x74, 0x56, 0x42, 0x36}}
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gEfiXenInfoGuid = {0xd3b46f3b, 0xd441, 0x1244, {0x9a, 0x12, 0x0, 0x12, 0x27, 0x3f, 0xc1, 0x4d}}
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