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| author | Ankur Arora <ankur.a.arora@oracle.com> | 2021-03-11 22:26:51 -0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-03-16 13:21:46 +0000 |
| commit | 8ade9d425a6e6b4c992bea6c3b5e65c32b6cd463 (patch) | |
| tree | f71899f516a61e2137e99b273873478d1e594107 /OvmfPkg/Include/Pcd | |
| parent | 15e6ae8ea400a55a6bcee8b2b654e5599c05ff18 (diff) | |
| download | edk2-8ade9d425a6e6b4c992bea6c3b5e65c32b6cd463.tar.gz edk2-8ade9d425a6e6b4c992bea6c3b5e65c32b6cd463.tar.bz2 edk2-8ade9d425a6e6b4c992bea6c3b5e65c32b6cd463.zip | |
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.h | 60 |
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_
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