diff options
| author | Preeti U Murthy <preeti@linux.vnet.ibm.com> | 2014-04-10 09:15:30 +0530 |
|---|---|---|
| committer | Eli Qiao <taget@linux.vnet.ibm.com> | 2014-04-10 12:28:27 +0800 |
| commit | d9d7d57a6fd38d23d12a309166426dca7e23ad59 (patch) | |
| tree | 0f0b3d1f15a87bae0fa2d6eeeda49d7750257351 | |
| parent | cf05d568d7b8bda30561d86976df73c16c17b42a (diff) | |
| download | powerkvm-d9d7d57a6fd38d23d12a309166426dca7e23ad59.tar.gz | |
kvm: Set the runlatch bit of a CPU just before starting guest
The secondary threads in the core have their runlatch bits cleared since they
are offline. When the secondary threads are called in to start a guest their
runlatch bits need to be set to indicate that they are busy. The primary
thread has its runlatch bit set though, but there is no harm in setting this
bit once again. Hence set the runlatch bit for all threads before they start
guest.
Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index e8beaf9814422..a49994cfe5833 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -249,6 +249,12 @@ kvm_novcpu_exit: */ .globl kvm_start_guest kvm_start_guest: + + /* Set runlatch bit the minute you wake up from nap */ + mfspr r1, SPRN_CTRLF + ori r1, r1, 1 + mtspr SPRN_CTRLT, r1 + ld r2,PACATOC(r13) li r0,KVM_HWTHREAD_IN_KVM |