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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-04-27 07:36:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-29 07:50:03 +0200 |
| commit | 2d863392f86b01ae0a578f72062ef8c5a27d651c (patch) | |
| tree | cacbf0be4a525c0635570f513f30e438958ca70b /arch/s390/kernel/smp.c | |
| parent | 76c45c1be03c60f9d983aed017182760dbd8bbf9 (diff) | |
s390: run user space and KVM guests with modified branch prediction
[ Upstream commit 6b73044b2b0081ee3dd1cd6eaab7dee552601efb ]
Define TIF_ISOLATE_BP and TIF_ISOLATE_BP_GUEST and add the necessary
plumbing in entry.S to be able to run user space and KVM guests with
limited branch prediction.
To switch a user space process to limited branch prediction the
s390_isolate_bp() function has to be call, and to run a vCPU of a KVM
guest associated with the current task with limited branch prediction
call s390_isolate_bp_guest().
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/s390/kernel/smp.c')
0 files changed, 0 insertions, 0 deletions