From 9cb730124eab508333c3c50de4fb2da565b4185c Mon Sep 17 00:00:00 2001
From: RoyalOughtness <129108030+RoyalOughtness@users.noreply.github.com>
Date: Thu, 1 Oct 2026 09:44:14 -0700
Subject: [PATCH 1/3] feat: enable CONFIG_ZERO_CALL_USED_REGS

---
 copr_script.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/copr_script.sh b/copr_script.sh
index c1cb319..076ad78 100644
--- a/copr_script.sh
+++ b/copr_script.sh
@@ -38,6 +38,12 @@ configs_to_enable=(
   # https://www.kernelconfig.io/CONFIG_IOMMU_DEFAULT_DMA_STRICT
   # Equivalent to defaulting iommu.passthrough=0 iommu.strict=1, already set by our kargs
   CONFIG_IOMMU_DEFAULT_DMA_STRICT
+
+  # https://www.kernelconfig.io/CONFIG_ZERO_CALL_USED_REGS
+  # Zero contents of caller-used registers before returning.
+  # Reduces attack surface with negigible perf impact and a 
+  # slight increase in kernel image size
+  CONFIG_ZERO_CALL_USED_REGS
 )
 
 configs_to_disable=(

From f9dfbe9032aca79e0d30b945a3a58f3b290573ae Mon Sep 17 00:00:00 2001
From: RoyalOughtness <129108030+RoyalOughtness@users.noreply.github.com>
Date: Thu, 1 Oct 2026 09:45:41 -0700
Subject: [PATCH 2/3] fix

---
 copr_script.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/copr_script.sh b/copr_script.sh
index 076ad78..80ff8c3 100644
--- a/copr_script.sh
+++ b/copr_script.sh
@@ -41,8 +41,8 @@ configs_to_enable=(
 
   # https://www.kernelconfig.io/CONFIG_ZERO_CALL_USED_REGS
   # Zero contents of caller-used registers before returning.
-  # Reduces attack surface with negigible perf impact and a 
-  # slight increase in kernel image size
+  # Reduces side channel attack vectors with negligible perf impact and a 
+  # slight increase in kernel image size (<1% on x86_64, 5% on aarch64)
   CONFIG_ZERO_CALL_USED_REGS
 )
 

From 86bd17dae05ce4acea4d511a78364d323877b197 Mon Sep 17 00:00:00 2001
From: RoyalOughtness <129108030+RoyalOughtness@users.noreply.github.com>
Date: Thu, 1 Oct 2026 09:46:32 -0700
Subject: [PATCH 3/3] fix

---
 copr_script.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/copr_script.sh b/copr_script.sh
index 80ff8c3..7dd6b25 100644
--- a/copr_script.sh
+++ b/copr_script.sh
@@ -41,7 +41,7 @@ configs_to_enable=(
 
   # https://www.kernelconfig.io/CONFIG_ZERO_CALL_USED_REGS
   # Zero contents of caller-used registers before returning.
-  # Reduces side channel attack vectors with negligible perf impact and a 
+  # Reduces side channel attack vectors with negligible perf impact and a
   # slight increase in kernel image size (<1% on x86_64, 5% on aarch64)
   CONFIG_ZERO_CALL_USED_REGS
 )