Index: chromium-143.0.7499.40/components/variations/proto/study.proto
===================================================================
--- chromium-143.0.7499.40.orig/components/variations/proto/study.proto
+++ chromium-143.0.7499.40/components/variations/proto/study.proto
@@ -293,6 +293,9 @@ message Study {
     // A Mac-only value, indicating an x86-64 binary running on an arm64 host
     // via "Rosetta 2" binary translation.
     TRANSLATED_X86_64 = 4;
+
+    // A POSIX-only value, indicating an OpenPOWER host
+    PPC64 = 5;
   }
 
   // Enum to pass as optional bool.
Index: chromium-143.0.7499.40/components/variations/service/variations_field_trial_creator.cc
===================================================================
--- chromium-143.0.7499.40.orig/components/variations/service/variations_field_trial_creator.cc
+++ chromium-143.0.7499.40/components/variations/service/variations_field_trial_creator.cc
@@ -105,6 +105,9 @@ Study::CpuArchitecture GetCurrentCpuArch
   if (process_arch == "x86") {
     return Study::X86_32;
   }
+  if (process_arch == "PPC_64") {
+    return Study::PPC64;
+  }
   if (process_arch == "x86_64") {
     std::string os_arch = base::SysInfo::OperatingSystemArchitecture();
     if (base::StartsWith(os_arch, "arm",