From: "Peter Müller" <peter.mueller@ipfire.org>
To: development@lists.ipfire.org
Subject: [PATCH] linux: Enable Intel DMA Remapping Devices by default on x86_64
Date: Mon, 11 Jul 2022 14:48:08 +0000 [thread overview]
Message-ID: <1416c8e1-d570-475b-8811-78ad39793078@ipfire.org> (raw)
[-- Attachment #1: Type: text/plain, Size: 1684 bytes --]
If available, the kernel will enable IOMMU (a/k/a DMA remapping) by
default on boot. To tools making use of that, particularly hypervisors,
this provides better security without any downsides.
Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
---
config/kernel/kernel.config.x86_64-ipfire | 2 +-
config/rootfiles/common/x86_64/linux | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
index 06d98e325..a5c5a4e29 100644
--- a/config/kernel/kernel.config.x86_64-ipfire
+++ b/config/kernel/kernel.config.x86_64-ipfire
@@ -6488,7 +6488,7 @@ CONFIG_AMD_IOMMU_V2=y
CONFIG_DMAR_TABLE=y
CONFIG_INTEL_IOMMU=y
CONFIG_INTEL_IOMMU_SVM=y
-# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
+CONFIG_INTEL_IOMMU_DEFAULT_ON=y
CONFIG_INTEL_IOMMU_FLOPPY_WA=y
# CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON is not set
CONFIG_IRQ_REMAP=y
diff --git a/config/rootfiles/common/x86_64/linux b/config/rootfiles/common/x86_64/linux
index 326bc6c6e..22c8cf352 100644
--- a/config/rootfiles/common/x86_64/linux
+++ b/config/rootfiles/common/x86_64/linux
@@ -8071,6 +8071,7 @@ etc/modprobe.d/ipv6.conf
#lib/modules/KVER-ipfire/build/include/config/INTEL_INT0002_VGPIO
#lib/modules/KVER-ipfire/build/include/config/INTEL_IOATDMA
#lib/modules/KVER-ipfire/build/include/config/INTEL_IOMMU
+#lib/modules/KVER-ipfire/build/include/config/INTEL_IOMMU_DEFAULT_ON
#lib/modules/KVER-ipfire/build/include/config/INTEL_IOMMU_FLOPPY_WA
#lib/modules/KVER-ipfire/build/include/config/INTEL_IOMMU_SVM
#lib/modules/KVER-ipfire/build/include/config/INTEL_IPS
--
2.35.3
reply other threads:[~2022-07-11 14:48 UTC|newest]
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