2d92e052c3
Add QemuCpuhpWriteCpuStatus() which will be used to update the QEMU CPU status register. On error, it hangs in a similar fashion as other helper functions. 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> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20210312062656.2477515-4-ankur.a.arora@oracle.com>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/** @file
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Simple wrapper functions and utility functions that access QEMU's modern CPU
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hotplug register block.
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These functions manipulate some of the registers described in
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"docs/specs/acpi_cpu_hotplug.txt" in the QEMU source. IO Ports are accessed
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via EFI_MM_CPU_IO_PROTOCOL. If a protocol call fails, these functions don't
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return.
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Copyright (c) 2020, Red Hat, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef QEMU_CPUHP_H_
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#define QEMU_CPUHP_H_
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#include <Protocol/MmCpuIo.h> // EFI_MM_CPU_IO_PROTOCOL
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#include <Uefi/UefiBaseType.h> // EFI_STATUS
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#include "ApicId.h" // APIC_ID
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UINT32
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QemuCpuhpReadCommandData2 (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
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);
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UINT8
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QemuCpuhpReadCpuStatus (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
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);
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UINT32
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QemuCpuhpReadCommandData (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
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);
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VOID
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QemuCpuhpWriteCpuSelector (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
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IN UINT32 Selector
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);
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VOID
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QemuCpuhpWriteCpuStatus (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
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IN UINT8 CpuStatus
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);
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VOID
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QemuCpuhpWriteCommand (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
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IN UINT8 Command
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);
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EFI_STATUS
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QemuCpuhpCollectApicIds (
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IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
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IN UINT32 PossibleCpuCount,
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IN UINT32 ApicIdCount,
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OUT APIC_ID *PluggedApicIds,
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OUT UINT32 *PluggedCount,
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OUT APIC_ID *ToUnplugApicIds,
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OUT UINT32 *ToUnplugSelectors,
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OUT UINT32 *ToUnplugCount
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);
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#endif // QEMU_CPUHP_H_
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