KVM: PPC: Add KVM intercept handlers

When an interrupt occurs we don't know yet if we're in guest context or
in host context. When in guest context, KVM needs to handle it.

So let's pull the same trick we did on Book3S_64: Just add a macro to
determine if we're in guest context or not and if so jump on to KVM code.

CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index e025e89..98c4b29 100644 (file)
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -33,6 +33,7 @@
 #include <asm/asm-offsets.h>
 #include <asm/ptrace.h>
 #include <asm/bug.h>
+#include <asm/kvm_book3s_asm.h>
 
 /* 601 only have IBAT; cr0.eq is set on 601 when using this macro */
 #define LOAD_BAT(n, reg, RA, RB)       \
@@ -303,6 +304,7 @@ __secondary_hold_acknowledge:
  */
 #define EXCEPTION(n, label, hdlr, xfer)                \
        . = n;                                  \
+       DO_KVM n;                               \
 label:                                         \
        EXCEPTION_PROLOG;                       \
        addi    r3,r1,STACK_FRAME_OVERHEAD;     \
@@ -358,6 +360,7 @@ i##n:                                                               \
  *     -- paulus.
  */
        . = 0x200
+       DO_KVM  0x200
        mtspr   SPRN_SPRG_SCRATCH0,r10
        mtspr   SPRN_SPRG_SCRATCH1,r11
        mfcr    r10
@@ -381,6 +384,7 @@ i##n:                                                               \
 
 /* Data access exception. */
        . = 0x300
+       DO_KVM  0x300
 DataAccess:
        EXCEPTION_PROLOG
        mfspr   r10,SPRN_DSISR
@@ -397,6 +401,7 @@ DataAccess:
 
 /* Instruction access exception. */
        . = 0x400
+       DO_KVM  0x400
 InstructionAccess:
        EXCEPTION_PROLOG
        andis.  r0,r9,0x4000            /* no pte found? */
@@ -413,6 +418,7 @@ InstructionAccess:
 
 /* Alignment exception */
        . = 0x600
+       DO_KVM  0x600
 Alignment:
        EXCEPTION_PROLOG
        mfspr   r4,SPRN_DAR
@@ -427,6 +433,7 @@ Alignment:
 
 /* Floating-point unavailable */
        . = 0x800
+       DO_KVM  0x800
 FPUnavailable:
 BEGIN_FTR_SECTION
 /*
@@ -450,6 +457,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_FPU_UNAVAILABLE)
 
 /* System call */
        . = 0xc00
+       DO_KVM  0xc00
 SystemCall:
        EXCEPTION_PROLOG
        EXC_XFER_EE_LITE(0xc00, DoSyscall)
@@ -467,9 +475,11 @@ SystemCall:
  * by executing an altivec instruction.
  */
        . = 0xf00
+       DO_KVM  0xf00
        b       PerformanceMonitor
 
        . = 0xf20
+       DO_KVM  0xf20
        b       AltiVecUnavailable
 
 /*
@@ -882,6 +892,10 @@ __secondary_start:
        RFI
 #endif /* CONFIG_SMP */
 
+#ifdef CONFIG_KVM_BOOK3S_HANDLER
+#include "../kvm/book3s_rmhandlers.S"
+#endif
+
 /*
  * Those generic dummy functions are kept for CPUs not
  * included in CONFIG_6xx