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RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 In TDX the guest firmware is designed to publish a multiprocessor-wakeup structure to let the guest-bootstrap processor wake up guest-application processors with a mailbox. The mailbox is memory that the guest firmware can reserve so each guest virtual processor can have the guest OS send a message to them. The address of the mailbox is recorded in the MADT table. See [ACPI]. To maintain the simplicity of the AcpiPlatformDxe, the MADT ACPI table will be altered in another driver (TdxDxe) by installing a protocol to notify that the ACPI table provided by Qemu is ready. Then in TdxDxe a notification functioin will be called to alter the MADT table to recorded the mailbox address. The protocol is gQemuAcpiTableNotifyProtocolGuid. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com>
28 lines
554 B
C
28 lines
554 B
C
/** @file
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef QEMU_ACPI_TABLE_NOTIFY_H_
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#define QEMU_ACPI_TABLE_NOTIFY_H_
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#define QEMU_ACPI_TABLE_NOTIFY_GUID \
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{ 0x928939b2, 0x4235, 0x462f, { 0x95, 0x80, 0xf6, 0xa2, 0xb2, 0xc2, 0x1a, 0x4f } };
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///
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/// Forward declaration
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///
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typedef struct _QEMU_ACPI_TABLE_NOTIFY_PROTOCOL QEMU_ACPI_TABLE_NOTIFY_PROTOCOL;
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///
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/// Protocol structure
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///
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struct _QEMU_ACPI_TABLE_NOTIFY_PROTOCOL {
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UINT8 Notify;
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};
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extern EFI_GUID gQemuAcpiTableNotifyProtocolGuid;
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#endif
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