powerpc: Remove KVMTEST from RELON exception handlers

KVMTEST is a macro which checks whether we are taking an exception from
guest context, if so we branch out of line and eventually call into the
KVM code to handle the switch.

When running real guests on bare metal (HV KVM) the hardware ensures
that we never take a relocation on exception when transitioning from
guest to host. For PR KVM we disable relocation on exceptions ourself in
kvmppc_core_init_vm(), as of commit a413f47 "Disable relocation on
exceptions whenever PR KVM is active".

So convert all the RELON macros to use NOTEST, and drop the remaining
KVM_HANDLER() definitions we have for 0xe40 and 0xe80.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
CC: <stable@vger.kernel.org> [v3.9+]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 8e5fae8beaf6ad0958e8188d8094ded008033425..484cb094ad42ddfeed906838c6cc93742504adb0 100644 (file)
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -358,12 +358,12 @@ label##_relon_pSeries:                                    \
        /* No guest interrupts come through here */     \
        SET_SCRATCH0(r13);              /* save r13 */  \
        EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
-                                      EXC_STD, KVMTEST_PR, vec)
+                                      EXC_STD, NOTEST, vec)
 
 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label)            \
        .globl label##_relon_pSeries;                           \
 label##_relon_pSeries:                                         \
-       EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec);        \
+       EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
        EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD)
 
 #define STD_RELON_EXCEPTION_HV(loc, vec, label)                \
@@ -374,12 +374,12 @@ label##_relon_hv:                                 \
        /* No guest interrupts come through here */     \
        SET_SCRATCH0(r13);      /* save r13 */          \
        EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
-                                      EXC_HV, KVMTEST, vec)
+                                      EXC_HV, NOTEST, vec)
 
 #define STD_RELON_EXCEPTION_HV_OOL(vec, label)                 \
        .globl label##_relon_hv;                                \
 label##_relon_hv:                                              \
-       EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec);           \
+       EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
        EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV)
 
 /* This associate vector numbers with bits in paca->irq_happened */

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index dcadf03814e12f8af5b5a77b314911c3c62bf72e..89eba1fb5bbecf3b9570238b97831c08d0b36e57 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1175,9 +1175,7 @@ __end_handlers:
 
        /* Equivalents to the above handlers for relocation-on interrupt vectors */
        STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
-       KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe40)
        MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)
-       KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe80)
 
        STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
        STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)