Hi all, On Tue, Jan 12, 2021 at 04:49:06PM +0000, Giancarlo Ferrari wrote: > machine_kexec() need to set rw permission in text and rodata sections > to assign some variables (e.g. kexec_start_address). To do that at > the end (after flushing pdm in memory, inv D-Cache, etc.) it needs to > invalidate TLB [section] entries. > > If during the TLB invalidation an interrupt occours, which might cause > a context switch, there is the risk to inject invalid TLBs, with ro > permissions. > > When trying to assign .text labels, this lead to the following issue: > > "Unable to handle kernel paging request at virtual address <valid_addr>" > > with FSR 0x80d. > > Signed-off-by: Giancarlo Ferrari <giancarlo.ferrar...@gmail.com> > --- > arch/arm/kernel/machine_kexec.c | 10 ++++++++++ > 1 file changed, 10 insertions(+)
has been re-submitted here: https://lore.kernel.org/lkml/1612140296-12546-1-git-send-email-giancarlo.ferrar...@gmail.com/ GF
