Messages in this thread | | | From | Matthew Garrett <> | Date | Wed, 4 Dec 2019 11:56:02 -0800 | Subject | Re: [PATCH] [EFI,PCI] Allow disabling PCI busmastering on bridges during boot |
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On Wed, Dec 4, 2019 at 11:50 AM Andy Lutomirski <luto@amacapital.net> wrote:
> Wouldn't it also be applicable in the much simpler case where the > firmware hands over control with no IOMMU configured but also with the > busmastering bit cleared. Does firmware do this? Does the kernel > currently configure the iOMMU before enabling busmastering?
We already handle this case - the kernel doesn't activate busmastering until after it does IOMMU setup.
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