feat: Add m7a as a tested instance

Adding M7a to our default tested intances and the cross snapshot
pipeline.
Update the README to reflect this change.

Signed-off-by: Jack Thomson <jackabt@amazon.com>

Author: JackThomson2

.buildkite/common.py

@@ -19,6 +19,7 @@
     "m5n.metal",  # Intel Cascade Lake
     "m6i.metal",  # Intel Icelake
     "m6a.metal",  # AMD Milan
+    "m7a.metal-48xl",  # AMD Genoa
     "m6g.metal",  # Graviton2
     "m7g.metal",  # Graviton3
 ]

.buildkite/pipeline_cross.py

@@ -18,7 +18,13 @@
     per_instance = pipeline.per_instance.copy()
     per_instance.pop("instances")
     per_instance.pop("platforms")
-    instances_x86_64 = ["c5n.metal", "m5n.metal", "m6i.metal", "m6a.metal"]
+    instances_x86_64 = [
+        "c5n.metal",
+        "m5n.metal",
+        "m6i.metal",
+        "m6a.metal",
+        "m7a.metal-48xl",
+    ]
     instances_aarch64 = ["m7g.metal"]
     commands = [
         "./tools/devtool -y test --no-build -- -m nonci -n4 integration_tests/functional/test_snapshot_phase1.py",

README.md

@@ -130,14 +130,15 @@ The **API endpoint** can be used to:
 
 We test all combinations of:
 
-| Instance  | Host OS & Kernel | Guest Rootfs | Guest Kernel |
-| :-------- | :--------------- | :----------- | :----------- |
-| c5n.metal | al2 linux_5.10   | ubuntu 24.04 | linux_5.10   |
-| m5n.metal | al2023 linux_6.1 |              | linux_6.1    |
-| m6i.metal |                  |              |              |
-| m6a.metal |                  |              |              |
-| m6g.metal |                  |              |              |
-| m7g.metal |                  |              |              |
+| Instance       | Host OS & Kernel | Guest Rootfs | Guest Kernel |
+| :------------- | :--------------- | :----------- | :----------- |
+| c5n.metal      | al2 linux_5.10   | ubuntu 24.04 | linux_5.10   |
+| m5n.metal      | al2023 linux_6.1 |              | linux_6.1    |
+| m6i.metal      |                  |              |              |
+| m6a.metal      |                  |              |              |
+| m7a.metal-48xl |                  |              |              |
+| m6g.metal      |                  |              |              |
+| m7g.metal      |                  |              |              |
 
 ## Known issues and Limitations