From e47ad3aa853a64bf4d2aab876e21384002f032a2 Mon Sep 17 00:00:00 2001
From: Tony Breeds <tony@bakeyournoodle.com>
Date: Tue, 17 Dec 2024 15:50:20 +1100
Subject: [PATCH] CI: Add a tool for displaying CPU flags and QEMU version

As RHEL-10, and related OS projects (CentOS, RockyLinux, and AlmaLinux),
need specific x86_84 machine levels, in this case x86_64-v3, It's helpful
to see which CPUFlags are present in a given node and which version of QEMU
is available.

This adds a small tool to list the CPUFlags needed and those found.  There are
a few tools that will can do similar things but I didn't find one that covered
what we need.

Change-Id: Id8e4f679f6e781dce61d6ace151f3b639dc7edcc
---
 .zuul.d/jobs.yaml                            |  1 +
 playbooks/dib-nodepool/files/cpu-level.sh    | 34 ++++++++++++++++++++
 playbooks/dib-nodepool/node-information.yaml | 16 +++++++++
 3 files changed, 51 insertions(+)
 create mode 100644 playbooks/dib-nodepool/files/cpu-level.sh
 create mode 100644 playbooks/dib-nodepool/node-information.yaml

diff --git a/.zuul.d/jobs.yaml b/.zuul.d/jobs.yaml
index b9cf040ab..559a32c3e 100644
--- a/.zuul.d/jobs.yaml
+++ b/.zuul.d/jobs.yaml
@@ -79,6 +79,7 @@
       Base job for DIB functional tests, which build and boot a node
       under nodepool, using source versions of dependencies such as
       nodepool, dib, openstacksdk and glean.
+    pre-run: playbooks/dib-nodepool/node-information.yaml
     parent: nodepool-functional-container-openstack-siblings-base
     post-run: playbooks/dib-nodepool/collect-openstack-logs.yaml
     vars:
diff --git a/playbooks/dib-nodepool/files/cpu-level.sh b/playbooks/dib-nodepool/files/cpu-level.sh
new file mode 100644
index 000000000..a6c4c0cf9
--- /dev/null
+++ b/playbooks/dib-nodepool/files/cpu-level.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+function report_cpu_flags() {
+    local flag
+
+    for flag; do
+        ## Note, it's important to keep a trailing space
+        case " ${flags} " in
+            *" ${flag} "*)
+                echo "  ${flag} Found"
+                ;;
+            *)
+                echo "  ${flag} NOT Found"
+                ;;
+        esac
+    done
+}
+
+data=$(< /proc/cpuinfo)
+flags=""
+flags=$(grep "^flags[[:space:]]*:" <<< "${data}" | head -n 1)
+flags="${flags#*:}"
+flags="${flags## }"
+
+echo "${flags}"
+
+echo "x86_64-v1"
+report_cpu_flags lm cmov cx8 fpu fxsr mmx syscall sse2
+echo "x86_64-v2"
+report_cpu_flags cx16 lahf_lm popcnt sse4_1 sse4_2 ssse3
+echo "x86_64-v3"
+report_cpu_flags avx avx2 bmi1 bmi2 f16c fma abm movbe xsave
+echo "x86_64-v4"
+report_cpu_flags avx512f avx512bw avx512cd avx512dq avx512vl
diff --git a/playbooks/dib-nodepool/node-information.yaml b/playbooks/dib-nodepool/node-information.yaml
new file mode 100644
index 000000000..8bbbf9ac5
--- /dev/null
+++ b/playbooks/dib-nodepool/node-information.yaml
@@ -0,0 +1,16 @@
+- hosts: all
+  tasks:
+  - name: Copy the cpu-level script into place
+    copy:
+      src: cpu-level.sh
+      dest: /tmp/cpu-level.sh
+      mode:
+  - name: Collect CPU flags for node
+    command:  bash /tmp/cpu-level.sh
+    # NOTE(tonyb):  This is interesting as QEMU gains the ability to emuluate
+    # newer machine types for example 7.2 is needed for haswell.
+  - name: Collect QEMU version
+    ignore_errors: true
+    shell: |-
+      qemu-kvm --version
+      qemu-system-$(arch) --version
\ No newline at end of file