powerpc/booke64: Add LRAT error exception handler

LRAT (Logical to Real Address Translation) present in MMU v2 provides hardware
translation from a logical page number (LPN) to a real page number (RPN) when
tlbwe is executed by a guest or when a page table translation occurs from a
guest virtual address.

Add LRAT error exception handler to Booke3E 64-bit kernel and the basic KVM
handler to avoid build breakage. This is a prerequisite for KVM LRAT support
that will follow.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index e7751561fd1d..4d5a0b1034e8 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -308,6 +308,7 @@ interrupt_base_book3e:					/* fake trap */
         EXCEPTION_STUB(0x2e0, guest_doorbell_crit)
         EXCEPTION_STUB(0x300, hypercall)
         EXCEPTION_STUB(0x320, ehpriv)
+        EXCEPTION_STUB(0x340, lrat_error)
 
         .globl interrupt_end_book3e
 interrupt_end_book3e:
@@ -677,6 +678,17 @@ kernel_dbg_exc:
         bl      .unknown_exception
         b       .ret_from_except
 
+/* LRAT Error interrupt */
+        START_EXCEPTION(lrat_error);
+        NORMAL_EXCEPTION_PROLOG(0x340, BOOKE_INTERRUPT_LRAT_ERROR,
+                                PROLOG_ADDITION_NONE)
+        EXCEPTION_COMMON(0x340, PACA_EXGEN, INTS_KEEP)
+        addi    r3,r1,STACK_FRAME_OVERHEAD
+        bl      .save_nvgprs
+        INTS_RESTORE_HARD
+        bl      .unknown_exception
+        b       .ret_from_except
+
 /*
  * An interrupt came in while soft-disabled; We mark paca->irq_happened
  * accordingly and if the interrupt is level sensitive, we hard disable
@@ -859,6 +871,7 @@ BAD_STACK_TRAMPOLINE(0x2e0)
 BAD_STACK_TRAMPOLINE(0x300)
 BAD_STACK_TRAMPOLINE(0x310)
 BAD_STACK_TRAMPOLINE(0x320)
+BAD_STACK_TRAMPOLINE(0x340)
 BAD_STACK_TRAMPOLINE(0x400)
 BAD_STACK_TRAMPOLINE(0x500)
 BAD_STACK_TRAMPOLINE(0x600)
@@ -1414,3 +1427,7 @@ _GLOBAL(setup_ehv_ivors)
         SET_IVOR(38, 0x2c0) /* Guest Processor Doorbell */
         SET_IVOR(39, 0x2e0) /* Guest Processor Doorbell Crit/MC */
         blr
+
+_GLOBAL(setup_lrat_ivor)
+        SET_IVOR(42, 0x340) /* LRAT Error */
+        blr