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| author | Andy Lutomirski <luto@kernel.org> | 2020-11-02 11:51:10 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-11-24 13:46:16 +0100 |
| commit | 716572b0003ef67a4889bd7d85baf5099c5a0248 (patch) | |
| tree | d8e205314e9865d8bb9c078735fda51a38b7c512 /init | |
| parent | b023fd5f741f34d2cd90258ccc3f245924d2eadd (diff) | |
selftests/x86/fsgsbase: Fix GS == 1, 2, and 3 tests
Setting GS to 1, 2, or 3 causes a nonsensical part of the IRET microcode
to change GS back to zero on a return from kernel mode to user mode. The
result is that these tests fail randomly depending on when interrupts
happen. Detect when this happens and let the test pass.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/7567fd44a1d60a9424f25b19a998f12149993b0d.1604346596.git.luto@kernel.org
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions