Merge ~ltrager/maas:grub_ppc64 into maas:master

[Lee Trager]

Add GRUB mapping for PPC64EL

[Lee Trager (ltrager)]

review: Approve

diff --git a/src/provisioningserver/boot/grub.py b/src/provisioningserver/boot/grub.py
index 6143e88..72f50bf 100644
--- a/src/provisioningserver/boot/grub.py
+++ b/src/provisioningserver/boot/grub.py
@@ -94,12 +94,14 @@ class UEFIAMD64BootMethod(BootMethod):
         mac = params.get("mac")
         if mac is not None:
             params["mac"] = mac.replace(":", "-")
+
+        # MAAS uses Debian architectures while GRUB uses standard Linux
+        # architectures.
         arch = params.get("arch")
         if arch == "x86_64":
-            # MAAS uses Debian architectures while GRUB uses standard Linux
-            # architectures. Convert x86_64 to amd64 as they mean the same
-            # thing.
             params["arch"] = "amd64"
+        elif arch in {"powerpc", "ppc64", "ppc64le"}:
+            params["arch"] = "ppc64el"
 
         return params
 
diff --git a/src/provisioningserver/boot/tests/test_grub.py b/src/provisioningserver/boot/tests/test_grub.py
index 449d7b2..064d992 100644
--- a/src/provisioningserver/boot/tests/test_grub.py
+++ b/src/provisioningserver/boot/tests/test_grub.py
@@ -408,6 +408,30 @@ class TestUEFIAMD64BootMethod(MAASTestCase):
             method.match_path(backend, b"/grub/grub.cfg-default-x86_64"),
         )
 
+    def test_match_path_arch_powerpc(self):
+        method = UEFIAMD64BootMethod()
+        backend = random.choice(["http", "tftp"])
+        self.assertEqual(
+            {"arch": "ppc64el"},
+            method.match_path(backend, b"/grub/grub.cfg-default-powerpc"),
+        )
+
+    def test_match_path_arch_ppc64(self):
+        method = UEFIAMD64BootMethod()
+        backend = random.choice(["http", "tftp"])
+        self.assertEqual(
+            {"arch": "ppc64el"},
+            method.match_path(backend, b"/grub/grub.cfg-default-ppc64"),
+        )
+
+    def test_match_path_arch_ppc64le(self):
+        method = UEFIAMD64BootMethod()
+        backend = random.choice(["http", "tftp"])
+        self.assertEqual(
+            {"arch": "ppc64el"},
+            method.match_path(backend, b"/grub/grub.cfg-default-ppc64le"),
+        )
+
     def test_match_path_arch_subarch(self):
         method = UEFIAMD64BootMethod()
         backend = random.choice(["http", "tftp"])