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| 47 | + <h2 class="title"> |
| 48 | + LINKTYPE_EDK2_MM |
| 49 | + </h2> |
| 50 | + <div class="entry"> |
| 51 | +<pre> |
| 52 | ++---------------+ |
| 53 | +| Packet Type | |
| 54 | +| (4 octets) | |
| 55 | ++---------------+ |
| 56 | +| Payload | |
| 57 | +. . |
| 58 | +. . |
| 59 | +. . |
| 60 | +</pre> |
| 61 | + <h3 class="subtitle">Description</h3> |
| 62 | +<p> |
| 63 | + Request serialization protocol used by edk2 firmware to communicate |
| 64 | + between normal mode and management mode ('MM' for short). |
| 65 | +</p> |
| 66 | +<p> |
| 67 | + The QEMU UEFI variable store implementation reuses the request |
| 68 | + serialization protocol for firmware ↔ QEMU communication. |
| 69 | +</p> |
| 70 | +<p> |
| 71 | + There are three packet types (32-bit integer in little endian byte |
| 72 | + order): |
| 73 | +</p> |
| 74 | +<ul> |
| 75 | + <li>RESET (1) - machine reset</li> |
| 76 | + <li>REQUEST (2) - normal mode → management mode request message</li> |
| 77 | + <li>REPLY (3) - management mode → normal mode response message</li> |
| 78 | +</ul> |
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