Re: [PATCH v3] powerpc: kvm: optimize "sc 1" as fast return

2013-11-19 Thread Alexander Graf
On 19.11.2013, at 07:12, Liu Ping Fan wrote: > In some scene, e.g openstack CI, PR guest can trigger "sc 1" frequently, > this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL > to HV guest, so powernv can return to HV guest without heavy exit, i.e, > no need to swap TLB,

[PATCH v3] powerpc: kvm: optimize "sc 1" as fast return

2013-11-18 Thread Liu Ping Fan
In some scene, e.g openstack CI, PR guest can trigger "sc 1" frequently, this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL to HV guest, so powernv can return to HV guest without heavy exit, i.e, no need to swap TLB, HTAB,.. etc Signed-off-by: Liu Ping Fan --- v3: add s

Re: [PATCH v3] powerpc: kvm: optimize "sc 1" as fast return

2013-11-18 Thread Alexander Graf
On 17.11.2013, at 20:09, Liu Ping Fan wrote: > In some scene, e.g openstack CI, PR guest can trigger "sc 1" frequently, > this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL > to HV guest, so powernv can return to HV guest without heavy exit, i.e, > no need to swap TLB,

[PATCH v3] powerpc: kvm: optimize "sc 1" as fast return

2013-11-17 Thread Liu Ping Fan
In some scene, e.g openstack CI, PR guest can trigger "sc 1" frequently, this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL to HV guest, so powernv can return to HV guest without heavy exit, i.e, no need to swap TLB, HTAB,.. etc Signed-off-by: Liu Ping Fan --- arch/pow