diff options
| author | Peter Zijlstra <[email protected]> | 2020-10-27 10:15:05 +0100 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2020-10-27 23:15:23 +0100 |
| commit | 2a9baf5ad4884108b3c6d56a50e8105ccf8a4ee7 (patch) | |
| tree | bc9ec3a80992bfac570f35708959deb34210848b /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | ed8780e3f2ecc82645342d070c6b4e530532e680 (diff) | |
x86/debug: Fix BTF handling
The SDM states that #DB clears DEBUGCTLMSR_BTF, this means that when the
bit is set for userspace (TIF_BLOCKSTEP) and a kernel #DB happens first,
the BTF bit meant for userspace execution is lost.
Have the kernel #DB handler restore the BTF bit when it was requested
for userspace.
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Kyle Huey <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions