diff options
| author | Peter Zijlstra <[email protected]> | 2020-05-29 23:27:36 +0200 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2020-06-11 15:15:22 +0200 |
| commit | 84b6a3491567a540f955e18d8e615493afa36df0 (patch) | |
| tree | 6cb78ccb03028398a87ffff420648ed4637c1488 /include/linux/fpga/fpga-bridge.h | |
| parent | cd840e424f27fcc1ae8d14b7ec3ec4560ee6561a (diff) | |
x86/entry: Optimize local_db_save() for virt
Because DRn access is 'difficult' with virt; but the DR7 read is cheaper
than a cacheline miss on native, add a virt specific fast path to
local_db_save(), such that when breakpoints are not in use to avoid
touching DRn entirely.
Suggested-by: Andy Lutomirski <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'include/linux/fpga/fpga-bridge.h')
0 files changed, 0 insertions, 0 deletions