From 85253e97064b665edf0ec2105c39fb39d76c7b53 Mon Sep 17 00:00:00 2001
From: "Joshua M. Boniface" <joshua@boniface.me>
Date: Tue, 5 Sep 2023 16:35:41 -0400
Subject: [PATCH] Enable pass-through IOMMU on Bookworm

---
 roles/base/templates/etc/default/grub.j2 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/roles/base/templates/etc/default/grub.j2 b/roles/base/templates/etc/default/grub.j2
index 9ca540a..c326fc0 100644
--- a/roles/base/templates/etc/default/grub.j2
+++ b/roles/base/templates/etc/default/grub.j2
@@ -3,7 +3,9 @@
 GRUB_DEFAULT=0
 GRUB_TIMEOUT=5
 GRUB_DISTRIBUTOR="PVC Parallel Virtual Cluster - Debian"
-{% if debian_version|int >= 11 %}
+{% if debian_version|int >= 12 %}
+GRUB_CMDLINE_LINUX="systemd.unified_cgroup_hierarchy=1 iommu=pt {{ grub_cmdline }}"
+{% elif debian_version|int >= 11 %}
 GRUB_CMDLINE_LINUX="systemd.unified_cgroup_hierarchy=1 {{ grub_cmdline }}"
 {% else %}
 GRUB_CMDLINE_LINUX="{{ grub_cmdline }}"