763840c9ab
Add a function that collects the APIC IDs of CPUs that have just been hot-plugged, or are about to be hot-unplugged. Pending events are only located and never cleared; QEMU's AML needs the firmware to leave the status bits intact in the hotplug register block. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1512 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20200226221156.29589-10-lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com> Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/** @file
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Macros for accessing QEMU's CPU hotplug register block.
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Copyright (C) 2019, Red Hat, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Specification Reference:
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- "docs/specs/acpi_cpu_hotplug.txt" in the QEMU source tree.
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The original (now "legacy") CPU hotplug interface appeared in QEMU v1.5.0.
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The new ("modern") hotplug interface appeared in QEMU v2.7.0.
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The macros in this header file map to the minimal subset of the modern
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interface that OVMF needs.
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**/
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#ifndef QEMU_CPU_HOTPLUG_H_
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#define QEMU_CPU_HOTPLUG_H_
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#include <Base.h>
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//
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// Each register offset is:
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// - relative to the board-dependent IO base address of the register block,
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// - named QEMU_CPUHP_(R|W|RW)_*, according to the possible access modes of the
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// register,
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// - followed by distinguished bitmasks or values in the register.
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//
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#define QEMU_CPUHP_R_CMD_DATA2 0x0
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#define QEMU_CPUHP_R_CPU_STAT 0x4
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#define QEMU_CPUHP_STAT_ENABLED BIT0
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#define QEMU_CPUHP_STAT_INSERT BIT1
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#define QEMU_CPUHP_STAT_REMOVE BIT2
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#define QEMU_CPUHP_RW_CMD_DATA 0x8
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#define QEMU_CPUHP_W_CPU_SEL 0x0
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#define QEMU_CPUHP_W_CMD 0x5
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#define QEMU_CPUHP_CMD_GET_PENDING 0x0
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#define QEMU_CPUHP_CMD_GET_ARCH_ID 0x3
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#endif // QEMU_CPU_HOTPLUG_H_
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