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/Include/IndustryStandard/QemuCpuHotplug.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h')
| -rw-r--r-- | roms/edk2/OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h b/roms/edk2/OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h new file mode 100644 index 000000000..a34a6d3fa --- /dev/null +++ b/roms/edk2/OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h @@ -0,0 +1,46 @@ +/** @file
+ Macros for accessing QEMU's CPU hotplug register block.
+
+ Copyright (C) 2019, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Specification Reference:
+
+ - "docs/specs/acpi_cpu_hotplug.txt" in the QEMU source tree.
+
+ The original (now "legacy") CPU hotplug interface appeared in QEMU v1.5.0.
+ The new ("modern") hotplug interface appeared in QEMU v2.7.0.
+
+ The macros in this header file map to the minimal subset of the modern
+ interface that OVMF needs.
+**/
+
+#ifndef QEMU_CPU_HOTPLUG_H_
+#define QEMU_CPU_HOTPLUG_H_
+
+#include <Base.h>
+
+//
+// Each register offset is:
+// - relative to the board-dependent IO base address of the register block,
+// - named QEMU_CPUHP_(R|W|RW)_*, according to the possible access modes of the
+// register,
+// - followed by distinguished bitmasks or values in the register.
+//
+#define QEMU_CPUHP_R_CMD_DATA2 0x0
+
+#define QEMU_CPUHP_R_CPU_STAT 0x4
+#define QEMU_CPUHP_STAT_ENABLED BIT0
+#define QEMU_CPUHP_STAT_INSERT BIT1
+#define QEMU_CPUHP_STAT_REMOVE BIT2
+
+#define QEMU_CPUHP_RW_CMD_DATA 0x8
+
+#define QEMU_CPUHP_W_CPU_SEL 0x0
+
+#define QEMU_CPUHP_W_CMD 0x5
+#define QEMU_CPUHP_CMD_GET_PENDING 0x0
+#define QEMU_CPUHP_CMD_GET_ARCH_ID 0x3
+
+#endif // QEMU_CPU_HOTPLUG_H_
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