From: Juliana Rodrigueiro <juliana.rodrigueiro@xxxxxxxxxxxxx> Sent: Thursday, May 2, 2019 9:14 AM > > So I got to the following commit: > > commit 6ba34171bcbd10321c6cf554e0c1144d170f9d1a > Author: Michael Kelley <mikelley@xxxxxxxxxxxxx> > Date: Thu Aug 2 03:08:24 2018 +0000 > > Drivers: hv: vmbus: Remove use of slow_virt_to_phys() > > slow_virt_to_phys() is only implemented for arch/x86. > Remove its use in arch independent Hyper-V drivers, and > replace with test for vmalloc() address followed by > appropriate v-to-p function. This follows the typical > pattern of other drivers and avoids the need to implement > slow_virt_to_phys() for Hyper-V on ARM64. > > Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > The catch is that slow_virt_to_phys has a special trick implemented in order > to keep specifically 32-PAE kernel working, it is explained in a comment > inside the function. > > Reverting this commit makes the kernel 4.19 32-bit PAE work again. However I > believe a better solution might exist. > > Comments are very much appreciated. > Julie -- thanks for tracking down the cause of the issue. I'll try to look at this tomorrow and propose a solution. Michael Kelley
