KVM: PPC: Book3S HV: Fix ABIv2 indirect branch issue

To establish addressability quickly, ABIv2 requires the target
address of the function being called to be in r12.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 868347ef09fd48bcf8bfd343becb49f6898887c5..da1cac5ae288519be4324fecca7df440ac710e7a 100644 (file)
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1913,8 +1913,8 @@ hcall_try_real_mode:
        lwax    r3,r3,r4
        cmpwi   r3,0
        beq     guest_exit_cont
-       add     r3,r3,r4
-       mtctr   r3
+       add     r12,r3,r4
+       mtctr   r12
        mr      r3,r9           /* get vcpu pointer */
        ld      r4,VCPU_GPR(R4)(r9)
        bctrl