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enforce of IOMMU TLB invalidation

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Raja Grewal 2022-07-13 04:47:07 +10:00
parent 33df16af80
commit a47922ad28
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1 changed files with 5 additions and 0 deletions
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etc/default/grub.d/40_enable_iommu.cfg
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@ -10,3 +10,8 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX intel_iommu=on amd_iommu=on"
## https://mjg59.dreamwidth.org/54433.html
## https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4444f8541dad16fefd9b8807ad1451e806ef1d94
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX efi=disable_early_pci_dma"
## Enables strict enforcement of IOMMU TLB invalidation so devices will never be able to access stale data contents
## https://github.com/torvalds/linux/blob/master/drivers/iommu/Kconfig#L97
## Page 11 of https://lenovopress.lenovo.com/lp1467.pdf
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX iommu.passthrough=0 iommu.strict=1"