lkml.org 
[lkml]   [2019]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] [EFI,PCI] Allow disabling PCI busmastering on bridges during boot
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.

\
 
 \ /
  Last update: 2019-12-04 20:57    [W:0.172 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site