From b6930eaede680a77a8ff4c2a8c2b4ae33c9aa12e Mon Sep 17 00:00:00 2001
From: Alexander Popov <alex.popov@linux.com>
Date: Mon, 11 Jul 2022 09:59:26 +0300
Subject: [PATCH] Add iommu.passthrough check
---
kconfig_hardened_check/__init__.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kconfig_hardened_check/__init__.py b/kconfig_hardened_check/__init__.py
index 28a661c..0d6a470 100644
--- a/kconfig_hardened_check/__init__.py
+++ b/kconfig_hardened_check/__init__.py
@@ -13,7 +13,6 @@
# N.B Hardening command line parameters:
# page_alloc.shuffle=1
# iommu=force (does it help against DMA attacks?)
-# iommu.passthrough=0
# slub_debug=FZ (slow)
# loadpin.enforce=1
# debugfs=no-mount (or off if possible)
@@ -662,6 +661,9 @@ def add_cmdline_checks(l, arch):
l += [OR(CmdlineCheck('self_protection', 'kspp', 'iommu.strict', '1'),
AND(KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y'),
CmdlineCheck('self_protection', 'kspp', 'iommu.strict', 'is not set')))]
+ l += [OR(CmdlineCheck('self_protection', 'kspp', 'iommu.passthrough', '0'),
+ AND(KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_PASSTHROUGH', 'is not set'),
+ CmdlineCheck('self_protection', 'kspp', 'iommu.passthrough', 'is not set')))]
if arch in ('X86_64', 'ARM64', 'X86_32'):
l += [OR(CmdlineCheck('self_protection', 'kspp', 'randomize_kstack_offset', '1'),
AND(KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y'),
--
libgit2 0.26.0