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| author | Kumar Gala <[email protected]> | 2011-10-06 02:53:40 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <[email protected]> | 2011-11-17 05:26:07 +0000 |
| commit | 187b9f2aa769198daa7cf8054abb65a08b8d8b47 (patch) | |
| tree | 722bbeb3aa73e59b1b6b3fb883c287adb7583a53 /lib/debugobjects.c | |
| parent | powerpc: Remove extraneous CONFIG_PPC_ADV_DEBUG_REGS define (diff) | |
| download | kernel-187b9f2aa769198daa7cf8054abb65a08b8d8b47.tar.gz kernel-187b9f2aa769198daa7cf8054abb65a08b8d8b47.zip | |
powerpc/book3e-64: Fix debug support for userspace
With the introduction of CONFIG_PPC_ADV_DEBUG_REGS user space debug is
broken on Book-E 64-bit parts that support delayed debug events. When
switch_booke_debug_regs() sets DBCR0 we'll start getting debug events as
MSR_DE is also set and we aren't able to handle debug events from kernel
space.
We can remove the hack that always enables MSR_DE and loads up DBCR0 and
just utilize switch_booke_debug_regs() to get user space debug working
again.
We still need to handle critical/debug exception stacks & proper
save/restore of state for those exception levles to support debug events
from kernel space like we have on 32-bit.
Signed-off-by: Kumar Gala <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions