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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-04-27 07:36:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-29 11:31:59 +0200 |
| commit | a1f44e7917a67bcd48a3c4bf5c13fd150850dc25 (patch) | |
| tree | f736688fa48c65db42495a25cce54b6d517577ce /arch/s390/kernel/module.c | |
| parent | 07f65a834a814fb1a1b428b26a671f9196031b60 (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/module.c')
0 files changed, 0 insertions, 0 deletions