63c89da242
Once a hot-added CPU finishes the SMBASE relocation, we need to pen it in a HLT loop. Add the NASM implementation (with just a handful of instructions, but much documentation), and some C language helper functions. 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: <20200226221156.29589-12-lersek@redhat.com> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
33 lines
643 B
C
33 lines
643 B
C
/** @file
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SMBASE relocation for hot-plugged CPUs.
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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 SMBASE_H_
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#define SMBASE_H_
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#include <Uefi/UefiBaseType.h> // EFI_STATUS
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#include <Uefi/UefiSpec.h> // EFI_BOOT_SERVICES
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EFI_STATUS
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SmbaseAllocatePostSmmPen (
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OUT UINT32 *PenAddress,
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IN CONST EFI_BOOT_SERVICES *BootServices
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);
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VOID
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SmbaseReinstallPostSmmPen (
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IN UINT32 PenAddress
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);
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VOID
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SmbaseReleasePostSmmPen (
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IN UINT32 PenAddress,
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IN CONST EFI_BOOT_SERVICES *BootServices
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);
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#endif // SMBASE_H_
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