diff options
| author | Paul Mackerras <paulus@samba.org> | 2014-01-08 21:25:28 +1100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-27 16:01:13 +0100 |
| commit | 5d00f66b865e3782c5852cdafe1cea11a292a81e (patch) | |
| tree | 5d1fc36361174c760ab5c315b98c336fdcaf83f3 /arch/powerpc/kvm/book3s_hv_rmhandlers.S | |
| parent | e0622bd9f2fccc8a801fa7aaf4fa6d7c728c3a78 (diff) | |
KVM: PPC: Book3S HV: Prepare for host using hypervisor doorbells
POWER8 has support for hypervisor doorbell interrupts. Though the
kernel doesn't use them for IPIs on the powernv platform yet, it
probably will in future, so this makes KVM cope gracefully if a
hypervisor doorbell interrupt arrives while in a guest.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 9e89c7577b4..eae4ab9b913 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1997,10 +1997,17 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_207S) BEGIN_FTR_SECTION cmpwi r6, 5 /* privileged doorbell? */ beq 0f + cmpwi r6, 3 /* hypervisor doorbell? */ + beq 3f END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) li r3, 1 /* anything else, return 1 */ 0: blr + /* hypervisor doorbell */ +3: li r12, BOOK3S_INTERRUPT_H_DOORBELL + li r3, 1 + blr + /* * Determine what sort of external interrupt is pending (if any). * Returns: |