kvm: powerpc: book3s: Cleanup interrupt handling code

With this patch if HV is included, interrupts come in to the HV version
of the kvmppc_interrupt code, which then jumps to the PR handler,
renamed to kvmppc_interrupt_pr, if the guest is a PR guest. This helps
in enabling both HV and PR, which we do in later patch

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

3 files changed, 20 insertions, 4 deletions

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index a22c9854a633..894662a5d4d5 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -198,6 +198,17 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
         cmpwi   r10,0;                                                  \
         bne     do_kvm_##n
 
+#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
+/*
+ * If hv is possible, interrupts come into to the hv version
+ * of the kvmppc_interrupt code, which then jumps to the PR handler,
+ * kvmppc_interrupt_pr, if the guest is a PR guest.
+ */
+#define kvmppc_interrupt kvmppc_interrupt_hv
+#else
+#define kvmppc_interrupt kvmppc_interrupt_pr
+#endif
+
 #define __KVM_HANDLER(area, h, n)                                       \
 do_kvm_##n:                                                             \
         BEGIN_FTR_SECTION_NESTED(947)                                   \
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 84105eb18a0e..f7e24c6cb8eb 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -742,8 +742,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
 /*
  * We come here from the first-level interrupt handlers.
  */
-        .globl  kvmppc_interrupt
-kvmppc_interrupt:
+        .globl  kvmppc_interrupt_hv
+kvmppc_interrupt_hv:
         /*
          * Register contents:
          * R12          = interrupt vector
@@ -757,6 +757,11 @@ kvmppc_interrupt:
         lbz     r9, HSTATE_IN_GUEST(r13)
         cmpwi   r9, KVM_GUEST_MODE_HOST_HV
         beq     kvmppc_bad_host_intr
+#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
+        cmpwi   r9, KVM_GUEST_MODE_GUEST
+        ld      r9, HSTATE_HOST_R2(r13)
+        beq     kvmppc_interrupt_pr
+#endif
         /* We're now back in the host but in guest MMU context */
         li      r9, KVM_GUEST_MODE_HOST_HV
         stb     r9, HSTATE_IN_GUEST(r13)
diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index 1abe4788191a..bc50c97751d3 100644
--- a/arch/powerpc/kvm/book3s_segment.S
+++ b/arch/powerpc/kvm/book3s_segment.S
@@ -161,8 +161,8 @@ kvmppc_handler_trampoline_enter_end:
 .global kvmppc_handler_trampoline_exit
 kvmppc_handler_trampoline_exit:
 
-.global kvmppc_interrupt
-kvmppc_interrupt:
+.global kvmppc_interrupt_pr
+kvmppc_interrupt_pr:
 
         /* Register usage at this point:
          *