Trying with fedora.

.github/actions/fedora-s390x/Dockerfile

@@ -0,0 +1,8 @@
+FROM multiarch/fedora:29-s390x
+
+COPY entry.sh /entry.sh
+
+RUN sh -c 'curl https://dl.google.com/go/go1.14.4.linux-s390x.tar.gz | tar xz -C /usr/local'
+RUN ln -s /usr/local/go/bin/go /usr/local/bin/go
+
+ENTRYPOINT ["sh", "/entry.sh"]

.github/actions/fedora-s390x/action.yml

@@ -0,0 +1,7 @@
+---
+name: 'fedora-s390x'
+description: 'builds golang inside linux/s390x'
+
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

.github/actions/fedora-s390x/entry.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+sh -c "echo $*"
+echo "Hello"
+date
+pwd
+ls
+GODEBUG=asyncpreemptoff=1 go test -v ./math/...
+date

.github/workflows/ci-actions.yml

@@ -1,3 +1,4 @@
+---
 name: CIRCL
 on:
   push:
@@ -34,28 +35,24 @@ jobs:
         run: go build -v ./...
       - name: Testing
         run: go test -v ./...
-  exotic_job:
-    name: Go-${{matrix.CFG[2]}}/${{matrix.CFG[0]}}
+  s390x_job:
+    name: Go-1.14/s390x
     runs-on: ubuntu-18.04
-    strategy:
-      matrix:
-        CFG: [ [s390x,s390x,1.14], [arm64,arm64v8,1.14] ]
     steps:
       - uses: actions/checkout@v2
       - name: Enabling Docker Experimental
         run: |
-          echo $'{\n    "experimental": true\n}' | sudo tee /etc/docker/daemon.json
+          echo $'{\n\t"experimental": true\n}' | sudo tee /etc/docker/daemon.json
           sudo service docker restart
       - name: Pulling Images
         run: |
           docker pull -q multiarch/qemu-user-static
+          docker pull -q multiarch/fedora:29-s390x
           docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
-      - uses: docker://s390x/golang:1.14
-        with:
-          options: --platform linux/s390x
-          args: go version         
+      - name: Testing
+        uses: ./.github/actions/fedora-s390x
   coverage_amd64_job:
-    needs: [ amd64_job ]
+    needs: [amd64_job]
     if: github.event_name == 'push'
     runs-on: ubuntu-18.04
     name: amd64/coverage