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authorAnkur Arora <ankur.a.arora@oracle.com>2021-03-11 22:26:51 -0800
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2021-03-16 13:21:46 +0000
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OvmfPkg: define CPU_HOT_EJECT_DATA
Define CPU_HOT_EJECT_DATA and add PCD PcdCpuHotEjectDataAddress, which will be used to share CPU ejection state between OvmfPkg/CpuHotPlugSmm and PiSmmCpuDxeSmm. 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> Message-Id: <20210312062656.2477515-6-ankur.a.arora@oracle.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/Include/Pcd')
-rw-r--r--OvmfPkg/Include/Pcd/CpuHotEjectData.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/OvmfPkg/Include/Pcd/CpuHotEjectData.h b/OvmfPkg/Include/Pcd/CpuHotEjectData.h
new file mode 100644
index 0000000000..0671437552
--- /dev/null
+++ b/OvmfPkg/Include/Pcd/CpuHotEjectData.h
@@ -0,0 +1,60 @@
+/** @file
+ Definition for the CPU_HOT_EJECT_DATA structure, which shares
+ CPU hot-eject state between OVMF's SmmCpuFeaturesLib instance in
+ PiSmmCpuDxeSmm, and CpuHotplugSmm.
+
+ CPU_HOT_EJECT_DATA is allocated in SMRAM, and pointed-to by
+ PcdCpuHotEjectDataAddress.
+
+ PcdCpuHotEjectDataAddress is valid when SMM_REQUIRE is TRUE
+ and PcdCpuMaxLogicalProcessorNumber > 1.
+
+ Copyright (C) 2021, Oracle Corporation.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef CPU_HOT_EJECT_DATA_H_
+#define CPU_HOT_EJECT_DATA_H_
+
+/**
+ CPU Hot-eject handler, called from SmmCpuFeaturesRendezvousExit()
+ on each CPU at exit from SMM.
+
+ @param[in] ProcessorNum ProcessorNum denotes the CPU exiting SMM,
+ and will be used as an index into
+ CPU_HOT_EJECT_DATA->QemuSelectorMap. It is
+ identical to the processor handle in
+ EFI_SMM_CPU_SERVICE_PROTOCOL.
+**/
+typedef
+VOID
+(EFIAPI *CPU_HOT_EJECT_HANDLER) (
+ IN UINTN ProcessorNum
+ );
+
+//
+// CPU_EJECT_QEMU_SELECTOR_INVALID marks CPUs not being ejected in
+// CPU_HOT_EJECT_DATA->QemuSelectorMap.
+//
+// QEMU CPU Selector is UINT32, so we choose an invalid value larger
+// than that type.
+//
+#define CPU_EJECT_QEMU_SELECTOR_INVALID (MAX_UINT64)
+
+typedef struct {
+ //
+ // Maps ProcessorNum -> QemuSelector for pending hot-ejects
+ //
+ volatile UINT64 *QemuSelectorMap;
+ //
+ // Handler to do the CPU ejection
+ //
+ volatile CPU_HOT_EJECT_HANDLER Handler;
+ //
+ // Entries in the QemuSelectorMap
+ //
+ UINT32 ArrayLength;
+} CPU_HOT_EJECT_DATA;
+
+#endif // CPU_HOT_EJECT_DATA_H_