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| author | Min Xu <min.m.xu@intel.com> | 2021-09-22 21:02:19 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-04-02 08:15:12 +0000 |
| commit | 9fdc70af6ba8982ba9c2a56e7dfc27f456884977 (patch) | |
| tree | de1646a52ca25041368c17bee5c9017620a0521c /OvmfPkg/Include | |
| parent | cf17156d7d3dc89c8798d600b24110052d6c12fe (diff) | |
| download | edk2-9fdc70af6ba8982ba9c2a56e7dfc27f456884977.tar.gz | |
OvmfPkg: Update AcpiPlatformDxe to alter MADT table
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>
Diffstat (limited to 'OvmfPkg/Include')
| -rw-r--r-- | OvmfPkg/Include/Protocol/QemuAcpiTableNotify.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/OvmfPkg/Include/Protocol/QemuAcpiTableNotify.h b/OvmfPkg/Include/Protocol/QemuAcpiTableNotify.h new file mode 100644 index 0000000000..a3dd2fc1dc --- /dev/null +++ b/OvmfPkg/Include/Protocol/QemuAcpiTableNotify.h @@ -0,0 +1,27 @@ +/** @file
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef QEMU_ACPI_TABLE_NOTIFY_H_
+#define QEMU_ACPI_TABLE_NOTIFY_H_
+
+#define QEMU_ACPI_TABLE_NOTIFY_GUID \
+ { 0x928939b2, 0x4235, 0x462f, { 0x95, 0x80, 0xf6, 0xa2, 0xb2, 0xc2, 0x1a, 0x4f } };
+
+///
+/// Forward declaration
+///
+typedef struct _QEMU_ACPI_TABLE_NOTIFY_PROTOCOL QEMU_ACPI_TABLE_NOTIFY_PROTOCOL;
+
+///
+/// Protocol structure
+///
+struct _QEMU_ACPI_TABLE_NOTIFY_PROTOCOL {
+ UINT8 Notify;
+};
+
+extern EFI_GUID gQemuAcpiTableNotifyProtocolGuid;
+
+#endif
|