diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h')
| -rw-r--r-- | roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h b/roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h new file mode 100644 index 000000000..8adaa0ad9 --- /dev/null +++ b/roms/edk2/OvmfPkg/CpuHotplugSmm/QemuCpuhp.h @@ -0,0 +1,61 @@ +/** @file
+ Simple wrapper functions and utility functions that access QEMU's modern CPU
+ hotplug register block.
+
+ These functions manipulate some of the registers described in
+ "docs/specs/acpi_cpu_hotplug.txt" in the QEMU source. IO Ports are accessed
+ via EFI_MM_CPU_IO_PROTOCOL. If a protocol call fails, these functions don't
+ return.
+
+ Copyright (c) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef QEMU_CPUHP_H_
+#define QEMU_CPUHP_H_
+
+#include <Protocol/MmCpuIo.h> // EFI_MM_CPU_IO_PROTOCOL
+#include <Uefi/UefiBaseType.h> // EFI_STATUS
+
+#include "ApicId.h" // APIC_ID
+
+UINT32
+QemuCpuhpReadCommandData2 (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
+ );
+
+UINT8
+QemuCpuhpReadCpuStatus (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
+ );
+
+UINT32
+QemuCpuhpReadCommandData (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
+ );
+
+VOID
+QemuCpuhpWriteCpuSelector (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
+ IN UINT32 Selector
+ );
+
+VOID
+QemuCpuhpWriteCommand (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
+ IN UINT8 Command
+ );
+
+EFI_STATUS
+QemuCpuhpCollectApicIds (
+ IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
+ IN UINT32 PossibleCpuCount,
+ IN UINT32 ApicIdCount,
+ OUT APIC_ID *PluggedApicIds,
+ OUT UINT32 *PluggedCount,
+ OUT APIC_ID *ToUnplugApicIds,
+ OUT UINT32 *ToUnplugCount
+ );
+
+#endif // QEMU_CPUHP_H_
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