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powerpc/booke64: Add LRAT error exception handler

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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>
This commit is contained in:
Mihai Caraman
2013-08-08 15:56:09 +03:00
committed by Scott Wood
parent dece8ada99
commit 228b1a4730
5 changed files with 33 additions and 0 deletions
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12
arch/powerpc/kernel/cpu_setup_fsl_booke.S
View File

@@ -57,6 +57,12 @@ _GLOBAL(__setup_cpu_e6500)
mflr r6
#ifdef CONFIG_PPC64
bl .setup_altivec_ivors
/* Touch IVOR42 only if the CPU supports E.HV category */
mfspr r10,SPRN_MMUCFG
rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
beq 1f
bl .setup_lrat_ivor
1:
#endif
bl __setup_cpu_e5500
mtlr r6
@@ -119,6 +125,12 @@ _GLOBAL(__setup_cpu_e5500)
_GLOBAL(__restore_cpu_e6500)
mflr r5
bl .setup_altivec_ivors
/* Touch IVOR42 only if the CPU supports E.HV category */
mfspr r10,SPRN_MMUCFG
rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
beq 1f
bl .setup_lrat_ivor
1:
bl __restore_cpu_e5500
mtlr r5
blr

17
arch/powerpc/kernel/exceptions-64e.S
View File

@@ -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