From: "Ankur Arora" <ankur.a.arora@oracle.com>
To: devel@edk2.groups.io
Cc: lersek@redhat.com, imammedo@redhat.com,
boris.ostrovsky@oracle.com,
Ankur Arora <ankur.a.arora@oracle.com>,
Jordan Justen <jordan.l.justen@intel.com>,
Ard Biesheuvel <ard.biesheuvel@arm.com>,
Aaron Young <aaron.young@oracle.com>
Subject: [PATCH v4 6/9] OvmfPkg/SmmCpuFeaturesLib: init CPU ejection state
Date: Sun, 17 Jan 2021 22:34:54 -0800 [thread overview]
Message-ID: <20210118063457.358581-7-ankur.a.arora@oracle.com> (raw)
In-Reply-To: <20210118063457.358581-1-ankur.a.arora@oracle.com>
Init CPU_HOT_EJECT_DATA, which will be used to share CPU ejection state
between SmmCpuFeaturesLib (via PiSmmCpuDxeSmm) and CpuHotPlugSmm.
CpuHotplugSmm also sets up the CPU ejection mechanism via
CPU_HOT_EJECT_DATA->Handler.
Additionally, expose CPU_HOT_EJECT_DATA via PcdCpuHotEjectDataAddress.
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Aaron Young <aaron.young@oracle.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3132
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
---
.../Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c | 62 ++++++++++++++++++++++
.../SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf | 3 ++
2 files changed, 65 insertions(+)
diff --git a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
index 7ef7ed98342e..70313fb754e2 100644
--- a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
+++ b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
@@ -14,7 +14,9 @@
#include <Library/PcdLib.h>
#include <Library/SmmCpuFeaturesLib.h>
#include <Library/SmmServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h> // AllocatePool()
#include <Library/UefiBootServicesTableLib.h>
+#include <Library/CpuHotEjectData.h>
#include <PiSmm.h>
#include <Register/Intel/SmramSaveStateMap.h>
#include <Register/QemuSmramSaveStateMap.h>
@@ -171,6 +173,54 @@ SmmCpuFeaturesHookReturnFromSmm (
return OriginalInstructionPointer;
}
+GLOBAL_REMOVE_IF_UNREFERENCED
+CPU_HOT_EJECT_DATA *mCpuHotEjectData = NULL;
+
+STATIC
+VOID
+EFIAPI
+SmmCpuFeaturesSmmInitHotEject(
+ VOID
+ )
+{
+ UINT32 mMaxNumberOfCpus;
+ EFI_STATUS Status;
+
+ if (!FeaturePcdGet (PcdCpuHotPlugSupport)) {
+ return;
+ }
+
+ // PcdCpuHotPlugSupport => PcdCpuMaxLogicalProcessorNumber
+ mMaxNumberOfCpus = PcdGet32 (PcdCpuMaxLogicalProcessorNumber);
+
+ // No spare CPUs to eject
+ if (mMaxNumberOfCpus == 1) {
+ return;
+ }
+
+ mCpuHotEjectData =
+ (CPU_HOT_EJECT_DATA *)AllocatePool (sizeof (*mCpuHotEjectData));
+ ASSERT (mCpuHotEjectData != NULL);
+
+ //
+ // Allocate buffer for pointers to array in CPU_HOT_EJECT_DATA.
+ //
+ mCpuHotEjectData->Revision = CPU_HOT_EJECT_DATA_REVISION_1; // Revision
+ mCpuHotEjectData->ArrayLength = mMaxNumberOfCpus; // Array Length of APIC ID
+ mCpuHotEjectData->ApicIdMap = // CpuIndex -> APIC ID map
+ (UINT64 *)AllocatePool (sizeof (UINT64) * mCpuHotEjectData->ArrayLength);
+ mCpuHotEjectData->Handler = NULL; // Hot Eject handler
+ mCpuHotEjectData->Handler = 0; // Reserved
+
+ ASSERT (mCpuHotEjectData->ApicIdMap != NULL);
+
+ //
+ // Expose address of CPU Hot eject Data structure
+ //
+ Status = PcdSet64S (PcdCpuHotEjectDataAddress, (UINT64)(VOID *)mCpuHotEjectData);
+ ASSERT_EFI_ERROR (Status);
+}
+
/**
Hook point in normal execution mode that allows the one CPU that was elected
as monarch during System Management Mode initialization to perform additional
@@ -188,6 +238,9 @@ SmmCpuFeaturesSmmRelocationComplete (
UINTN MapPagesBase;
UINTN MapPagesCount;
+
+ SmmCpuFeaturesSmmInitHotEject();
+
if (!MemEncryptSevIsEnabled ()) {
return;
}
@@ -375,6 +428,15 @@ SmmCpuFeaturesRendezvousExit (
IN UINTN CpuIndex
)
{
+ //
+ // CPU Hot eject not enabled.
+ //
+ if (mCpuHotEjectData == NULL ||
+ mCpuHotEjectData->Handler == NULL) {
+ return;
+ }
+
+ mCpuHotEjectData->Handler(CpuIndex);
}
/**
diff --git a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
index 97a10afb6e27..c27b0f2c4d03 100644
--- a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
+++ b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
@@ -35,4 +35,7 @@
UefiBootServicesTableLib
[Pcd]
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuHotPlugSupport
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber
+ gUefiOvmfPkgTokenSpaceGuid.PcdCpuHotEjectDataAddress
gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase
--
2.9.3
next prev parent reply other threads:[~2021-01-18 6:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 6:34 [PATCH v4 0/9] support CPU hot-unplug Ankur Arora
2021-01-18 6:34 ` [PATCH v4 1/9] OvmfPkg/CpuHotplugSmm: refactor hotplug logic Ankur Arora
2021-01-18 6:34 ` [PATCH v4 2/9] OvmfPkg/CpuHotplugSmm: collect hot-unplug events Ankur Arora
2021-01-18 6:34 ` [PATCH v4 3/9] OvmfPkg/CpuHotplugSmm: add Qemu Cpu Status helper Ankur Arora
2021-01-18 6:34 ` [PATCH v4 4/9] OvmfPkg/CpuHotplugSmm: introduce UnplugCpus() Ankur Arora
2021-01-18 6:34 ` [PATCH v4 5/9] OvmfPkg/CpuHotplugSmm: define CPU_HOT_EJECT_DATA Ankur Arora
2021-01-18 6:34 ` Ankur Arora [this message]
2021-01-18 6:34 ` [PATCH v4 7/9] OvmfPkg/CpuHotplugSmm: add CpuEject() Ankur Arora
2021-01-18 6:34 ` [PATCH v4 8/9] OvmfPkg/CpuHotplugSmm: add worker to do CPU ejection Ankur Arora
2021-01-18 6:34 ` [PATCH v4 9/9] OvmfPkg/SmmControl2Dxe: negotiate CPU hot-unplug Ankur Arora
2021-01-18 17:09 ` [edk2-devel] [PATCH v4 0/9] support " Laszlo Ersek
2021-01-18 18:35 ` Ankur Arora
2021-01-21 12:29 ` Laszlo Ersek
2021-01-21 19:11 ` Ankur Arora
2021-01-21 19:51 ` Laszlo Ersek
2021-01-22 6:32 ` Ankur Arora
2021-01-22 12:43 ` Laszlo Ersek
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