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50 lines
2.2 KiB
50 lines
2.2 KiB
From bc8defc9d1f4e07685d4535ae47659aae8f29aed Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
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<marmarek@invisiblethingslab.com>
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Date: Fri, 19 Oct 2018 08:02:12 +0200
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Subject: [PATCH] anaconda: disable iommu for IGFX
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Many Intel processors (and BIOSes) have invalid IOMMU configuration for
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IGFX, which cause multiple problems - from screen glitches, to system
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hang.
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Since IGFX currently is still in dom0 (isn't isolated from other system
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components), disabling IOMMU for it doesn't lower overall security.
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When GUI domain will be implemented, we need to re-enable IOMMU here and
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hope hardware manufacturers will fix it in the meantime.
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Fixes QubesOS/qubes-issues#2836
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Signed-off-by: Frédéric Pierret <frederic.epitre@orange.fr>
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---
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pyanaconda/bootloader.py | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/pyanaconda/bootloader.py b/pyanaconda/bootloader.py
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index 26a48fc7a..b0db4a087 100644
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--- a/pyanaconda/bootloader.py
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+++ b/pyanaconda/bootloader.py
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@@ -1504,7 +1504,7 @@ class GRUB2(GRUB):
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# boot arguments
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log.info("bootloader.py: used boot args: %s ", self.boot_args)
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defaults.write("GRUB_CMDLINE_LINUX=\"%s\"\n" % self.boot_args)
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- defaults.write("GRUB_CMDLINE_XEN_DEFAULT=\"console=none dom0_mem=min:1024M dom0_mem=max:4096M\"\n")
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+ defaults.write("GRUB_CMDLINE_XEN_DEFAULT=\"console=none dom0_mem=min:1024M dom0_mem=max:4096M iommu=no-igfx\"\n")
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defaults.write("GRUB_DISABLE_RECOVERY=\"true\"\n")
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defaults.write("GRUB_THEME=\"/boot/grub2/themes/system/theme.txt\"\n")
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defaults.close()
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@@ -1885,7 +1885,7 @@ class XenEFI(EFIGRUB):
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for image in self.images:
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config.write("\n")
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config.write("[{}]\n".format(image.version))
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- config.write("options=loglvl=all dom0_mem=min:1024M dom0_mem=max:4096M\n")
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+ config.write("options=loglvl=all dom0_mem=min:1024M dom0_mem=max:4096M iommu=no-igfx\n")
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config.write("kernel={} root={} {}\n".format(
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image.kernel,
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image.device.fstab_spec,
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--
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2.14.4
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