diff options
Diffstat (limited to 'debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch')
| -rw-r--r-- | debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch b/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch new file mode 100644 index 000000000..1840fc4bd --- /dev/null +++ b/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch @@ -0,0 +1,85 @@ +From: Ben Hutchings <ben@decadent.org.uk> +Date: Wed, 21 Aug 2019 00:32:16 +0100 +Subject: intel-iommu: Add Kconfig option to exclude iGPU by default +Bug-Debian: https://bugs.debian.org/935270 +Bug-Kali: https://bugs.kali.org/view.php?id=5644 + +There is still laptop firmware that touches the integrated GPU behind +the operating system's back, and doesn't say so in the RMRR table. +Enabling the IOMMU for all devices causes breakage. + +Replace CONFIG_INTEL_IOMMU_DEFAULT_ON with a 3-way choice +corresponding to "on", "off", and "on,intgpu_off". + +Signed-off-by: Ben Hutchings <ben@decadent.org.uk> +--- +--- a/drivers/iommu/intel/Kconfig ++++ b/drivers/iommu/intel/Kconfig +@@ -45,14 +45,28 @@ config INTEL_IOMMU_SVM + to access DMA resources through process address space by + means of a Process Address Space ID (PASID). + +-config INTEL_IOMMU_DEFAULT_ON +- def_bool y +- prompt "Enable Intel DMA Remapping Devices by default" +- depends on INTEL_IOMMU ++if INTEL_IOMMU ++ ++choice ++ prompt "Default state of Intel DMA Remapping Devices" ++ default INTEL_IOMMU_DEFAULT_ON + help +- Selecting this option will enable a DMAR device at boot time if +- one is found. If this option is not selected, DMAR support can +- be enabled by passing intel_iommu=on to the kernel. ++ Choose whether Intel DMA Remapping Devices should be enabled ++ by default. This can be overridden at boot time using the ++ intel_iommu= kernel parameter. ++ ++config INTEL_IOMMU_DEFAULT_ON ++ bool "Enable" ++ ++config INTEL_IOMMU_DEFAULT_ON_INTGPU_OFF ++ bool "Enable, excluding integrated GPU" ++ ++config INTEL_IOMMU_DEFAULT_OFF ++ bool "Disable" ++ ++endchoice ++ ++endif + + config INTEL_IOMMU_BROKEN_GFX_WA + bool "Workaround broken graphics drivers (going away soon)" +--- a/drivers/iommu/intel/iommu.c ++++ b/drivers/iommu/intel/iommu.c +@@ -338,11 +338,7 @@ static int intel_iommu_attach_device(str + static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova); + +-#ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON +-int dmar_disabled = 0; +-#else +-int dmar_disabled = 1; +-#endif /* CONFIG_INTEL_IOMMU_DEFAULT_ON */ ++int dmar_disabled = IS_ENABLED(CONFIG_INTEL_IOMMU_DEFAULT_OFF); + + #ifdef CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON + int intel_iommu_sm = 1; +@@ -354,7 +350,7 @@ int intel_iommu_enabled = 0; + EXPORT_SYMBOL_GPL(intel_iommu_enabled); + + static int dmar_map_gfx = 1; +-static int dmar_map_intgpu = 1; ++static int dmar_map_intgpu = IS_ENABLED(CONFIG_INTEL_IOMMU_DEFAULT_ON); + static int dmar_forcedac; + static int intel_iommu_strict; + static int intel_iommu_superpage = 1; +@@ -442,6 +438,7 @@ static int __init intel_iommu_setup(char + while (*str) { + if (!strncmp(str, "on", 2)) { + dmar_disabled = 0; ++ dmar_map_intgpu = 1; + pr_info("IOMMU enabled\n"); + } else if (!strncmp(str, "off", 3)) { + dmar_disabled = 1; |