AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-17 03:59:01 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool.

Browse Source 
Commit 8c8c10b90d ("powerpc/8xx: fix handling of early NULL pointer
dereference") moved the loading of r6 earlier in the code. As some
functions are called inbetween, r6 needs to be loaded again with the
address of swapper_pg_dir in order to set PTE pointers for
the Abatron BDI.

Fixes: 8c8c10b90d ("powerpc/8xx: fix handling of early NULL pointer dereference")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-01-09 20:30:07 +00:00 committed by Michael Ellerman
parent d7b6cc199b
commit fb0bdec51a
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/powerpc/kernel/head_8xx.S
View File

@ -852,11 +852,12 @@ start_here:
/* set up the PTE pointers for the Abatron bdiGDB. /* set up the PTE pointers for the Abatron bdiGDB.
*/ */
tovirt(r6,r6)
lis r5, abatron_pteptrs@h lis r5, abatron_pteptrs@h
ori r5, r5, abatron_pteptrs@l ori r5, r5, abatron_pteptrs@l
stw r5, 0xf0(0) /* Must match your Abatron config file */ stw r5, 0xf0(0) /* Must match your Abatron config file */
tophys(r5,r5) tophys(r5,r5)
lis r6, swapper_pg_dir@h
ori r6, r6, swapper_pg_dir@l
stw r6, 0(r5) stw r6, 0(r5)
/* Now turn on the MMU for real! */ /* Now turn on the MMU for real! */