[PATCH] Package microcode for the x86 hardware runners

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

They are all out of date, to different degrees.

Install jq into the x86_64 build container so we can parse the Github latest
release information in an acceptable way.

The resulting archive must be uncompressed, in order to work during early
boot.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Michal Orzel <michal.orzel@xxxxxxx>
CC: Doug Goldstein <cardoe@xxxxxxxxxx>
CC: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>

Example working in Xen:
  https://gitlab.com/xen-project/hardware/xen-staging/-/jobs/9700756054#L206
---
 .gitlab-ci.yml                             |  4 +++
 images/alpine/3.18-x86_64-build.dockerfile |  3 ++
 scripts/x86-microcode.sh                   | 42 ++++++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100755 scripts/x86-microcode.sh

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3587d660aa62..63722233dc6f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -64,6 +64,10 @@ linux-6.6.56-x86_64:
     ARGO_SHA: "ca5473a56f62e2b4d59697c8552d151391d3fec1"
     ARGOEXEC_SHA: "d900429f6640acc6f68a3d3a4c945d7da60625d8"
 
+microcode-x86:
+  extends: .x86_64-artifacts
+  script: ./scripts/x86-microcode.sh
+
 #
 # The jobs below here are legacy and being phased out.
 #
diff --git a/images/alpine/3.18-x86_64-build.dockerfile 
b/images/alpine/3.18-x86_64-build.dockerfile
index eac0cda4fed3..c4ff30e1f138 100644
--- a/images/alpine/3.18-x86_64-build.dockerfile
+++ b/images/alpine/3.18-x86_64-build.dockerfile
@@ -27,6 +27,9 @@ RUN <<EOF
             openssl-dev
             perl
 
+            # Microcode
+            jq
+
             # Argo build deps
             autoconf
             automake
diff --git a/scripts/x86-microcode.sh b/scripts/x86-microcode.sh
new file mode 100755
index 000000000000..cb55a3bd2d52
--- /dev/null
+++ b/scripts/x86-microcode.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+set -eux -o pipefail
+
+WORKDIR="${PWD}"
+COPYDIR="${WORKDIR}/binaries"
+
+ROOTDIR="${WORKDIR}/root"
+UCODEDIR="${ROOTDIR}/kernel/x86/microcode"
+mkdir -p "${UCODEDIR}"
+
+#
+# Intel microcode comes from github
+#
+curl -fsSL 
https://api.github.com/repos/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/latest
 > intel-latest.json
+TARBALL_URL="$(jq -r .tarball_url intel-latest.json)"
+curl -fsSL "${TARBALL_URL}" > intel-latest.tar
+tar xf intel-latest.tar --strip-components=1
+
+(
+    cd intel-ucode
+    cat 06-97-02 # adl-*
+    cat 06-8e-09 # kbl-*
+) > "${UCODEDIR}/GenuineIntel.bin"
+
+#
+# AMD microcode comes from linux-firmware
+#
+curl -fsSLO 
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/amd-ucode/microcode_amd_fam17h.bin
+curl -fsSLO 
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/amd-ucode/microcode_amd_fam19h.bin
+
+(
+    cat microcode_amd_fam17h.bin # zen2-*, xilinux-*-x86_64-*
+    cat microcode_amd_fam19h.bin # zen3p-*
+) > "${UCODEDIR}/AuthenticAMD.bin"
+
+# Package everything up.  It must be uncompressed
+cd "${ROOTDIR}"
+find . | cpio -R 0:0 -H newc -o > "${COPYDIR}/ucode.cpio"
+
+# Print the contents for the build log
+cpio -tv < "${COPYDIR}/ucode.cpio"
-- 
2.39.5