psp/msg_report: Add attestation report data structures

Attestation report is one of the SNP_GUEST_REQUEST commands that can be
send to the PSP firmware.

The SnpGuestRequest is used to assemble the request and PSP firmware
will send back the response in the SnpGuestResponse structure, which
contains the signed attestation report.

Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>

Author: cclaudio

src/psp/mod.rs

@@ -8,3 +8,5 @@
 
 /// SNP Guest Request driver
 pub mod guest_request_cmd;
+/// Attestation report structures
+pub mod msg_report;

src/psp/msg_report.rs

@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (C) 2023 IBM
+ *
+ * Authors:
+ *   Claudio Carvalho <cclaudio@linux.ibm.com>
+ */
+
+/// SnpReportRequest size
+const REQUEST_SIZE: usize = core::mem::size_of::<SnpReportRequest>();
+
+/// 64
+pub const USER_DATA_SIZE: usize = 64;
+
+#[repr(C, packed)]
+#[derive(Debug, Copy, Clone)]
+pub struct SnpReportRequest {
+    user_data: [u8; USER_DATA_SIZE],
+    vmpl: u32,
+    rsvd: [u8; 28usize],
+}
+
+#[repr(C)]
+#[repr(align(2048))]
+#[derive(Debug, Copy, Clone)]
+pub struct SnpReportResponse {
+    status: u32,
+    report_size: u32,
+    _reserved: [u8; 24],
+    report: AttestationReport,
+}
+
+// Converted tcb_version from enum to
+// struct to make alignment simple.
+#[repr(C, packed)]
+#[derive(Debug, Copy, Clone)]
+struct TcbVersion {
+    raw: u64,
+}
+
+#[repr(C, packed)]
+#[derive(Debug, Copy, Clone)]
+struct Signature {
+    r: [u8; 72usize],
+    s: [u8; 72usize],
+    reserved: [u8; 368usize],
+}
+
+#[repr(C, packed)]
+#[derive(Debug, Copy, Clone)]
+pub struct AttestationReport {
+    version: u32,
+    guest_svn: u32,
+    policy: u64,
+    family_id: [u8; 16usize],
+    image_id: [u8; 16usize],
+    vmpl: u32,
+    signature_algo: u32,
+    platform_version: TcbVersion,
+    platform_info: u64,
+    flags: u32,
+    reserved0: u32,
+    report_data: [u8; 64usize],
+    measurement: [u8; 48usize],
+    host_data: [u8; 32usize],
+    id_key_digest: [u8; 48usize],
+    author_key_digest: [u8; 48usize],
+    report_id: [u8; 32usize],
+    report_id_ma: [u8; 32usize],
+    reported_tcb: TcbVersion,
+    reserved1: [u8; 24usize],
+    chip_id: [u8; 64usize],
+    reserved2: [u8; 192usize],
+    signature: Signature,
+}