diff options
| author | Andy Lutomirski <[email protected]> | 2017-11-02 00:59:13 -0700 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-11-02 11:04:46 +0100 |
| commit | 20bb83443ea79087b5e5f8dab4e9d80bb9bf7acb (patch) | |
| tree | 0f12b47f202f739b1e22ee6e6734273a8071ef9b /lib/memory-notifier-error-inject.c | |
| parent | f16b3da1dc936c0f8121741d0a1731bf242f2f56 (diff) | |
x86/entry/64: Stop initializing TSS.sp0 at boot
In my quest to get rid of thread_struct::sp0, I want to clean up or
remove all of its readers. Two of them are in cpu_init() (32-bit and
64-bit), and they aren't needed. This is because we never enter
userspace at all on the threads that CPUs are initialized in.
Poison the initial TSS.sp0 and stop initializing it on CPU init.
The comment text mostly comes from Dave Hansen. Thanks!
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/ee4a00540ad28c6cff475fbcc7769a4460acc861.1509609304.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions