diff options
| author | Peter Zijlstra <[email protected]> | 2022-06-14 23:15:53 +0200 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2022-06-27 10:33:59 +0200 |
| commit | 2dbb887e875b1de3ca8f40ddf26bcfe55798c609 (patch) | |
| tree | 1f56e999ec2820a42d3020e89ebf0b489d34fdf8 /samples/bpf/map_perf_test_user.c | |
| parent | caa0ff24d5d0e02abce5e65c3d2b7f20a6617be5 (diff) | |
x86/entry: Add kernel IBRS implementation
Implement Kernel IBRS - currently the only known option to mitigate RSB
underflow speculation issues on Skylake hardware.
Note: since IBRS_ENTER requires fuller context established than
UNTRAIN_RET, it must be placed after it. However, since UNTRAIN_RET
itself implies a RET, it must come after IBRS_ENTER. This means
IBRS_ENTER needs to also move UNTRAIN_RET.
Note 2: KERNEL_IBRS is sub-optimal for XenPV.
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Diffstat (limited to 'samples/bpf/map_perf_test_user.c')
0 files changed, 0 insertions, 0 deletions