powerpc/64s/exception: remove __BRANCH_TO_KVM

No generated code change.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index ba2ecbd06c722107e76f4de22f75fd31aedd9c95..c354bb9606b8cf7389448b42117e5d80b2b41820 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -243,29 +243,6 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
 #endif
 
 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
-
-#ifdef CONFIG_RELOCATABLE
-/*
- * KVM requires __LOAD_FAR_HANDLER.
- *
- * __BRANCH_TO_KVM_EXIT branches are also a special case because they
- * explicitly use r9 then reload it from PACA before branching. Hence
- * the double-underscore.
- */
-#define __BRANCH_TO_KVM_EXIT(area, label)                              \
-       mfctr   r9;                                                     \
-       std     r9,HSTATE_SCRATCH1(r13);                                \
-       __LOAD_FAR_HANDLER(r9, label);                                  \
-       mtctr   r9;                                                     \
-       ld      r9,area+EX_R9(r13);                                     \
-       bctr
-
-#else
-#define __BRANCH_TO_KVM_EXIT(area, label)                              \
-       ld      r9,area+EX_R9(r13);                                     \
-       b       label
-#endif
-
 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 /*
  * If hv is possible, interrupts come into to the hv version
@@ -311,8 +288,24 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
        .else
        ori     r12,r12,(\n)
        .endif
-       /* This reloads r9 before branching to kvmppc_interrupt */
-       __BRANCH_TO_KVM_EXIT(\area, kvmppc_interrupt)
+
+#ifdef CONFIG_RELOCATABLE
+       /*
+        * KVM requires __LOAD_FAR_HANDLER beause kvmppc_interrupt lives
+        * outside the head section. CONFIG_RELOCATABLE KVM expects CTR
+        * to be saved in HSTATE_SCRATCH1.
+        */
+       mfctr   r9
+       std     r9,HSTATE_SCRATCH1(r13)
+       __LOAD_FAR_HANDLER(r9, kvmppc_interrupt)
+       mtctr   r9
+       ld      r9,\area+EX_R9(r13)
+       bctr
+#else
+       ld      r9,\area+EX_R9(r13)
+       b       kvmppc_interrupt
+#endif
+
 
        .if \skip
 89:    mtocrf  0x80,r9