From patchwork Wed Jul 11 00:56:38 2012
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From: Alexander Graf <agraf@suse.de>
To: KVM list <kvm@vger.kernel.org>
Cc: kvm-ppc@vger.kernel.org, Avi Kivity <avi@redhat.com>,
	Marcelo Tossati <mtosatti@redhat.com>,
	Bharat Bhushan <r65777@freescale.com>,
	Bharat Bhushan <bharat.bhushan@freescale.com>
Subject: [PATCH 3/9] booke: Added crit/mc exception handler for e500v2
Date: Wed, 11 Jul 2012 02:56:38 +0200
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From: Bharat Bhushan <r65777@freescale.com>

Watchdog is taken at critical exception level. So this patch
is tested with host watchdog exception happening when guest
is running.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/booke_interrupts.S |   55 +++++++++++++++++------------------
 1 files changed, 27 insertions(+), 28 deletions(-)

diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
index 8feec2f..09456c4 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -53,16 +53,21 @@
                        (1<<BOOKE_INTERRUPT_PROGRAM) | \
                        (1<<BOOKE_INTERRUPT_DTLB_MISS))
 
-.macro KVM_HANDLER ivor_nr
+.macro KVM_HANDLER ivor_nr scratch srr0
 _GLOBAL(kvmppc_handler_\ivor_nr)
 	/* Get pointer to vcpu and record exit number. */
-	mtspr	SPRN_SPRG_WSCRATCH0, r4
+	mtspr	\scratch , r4
 	mfspr	r4, SPRN_SPRG_RVCPU
+	stw	r3, VCPU_GPR(r3)(r4)
 	stw	r5, VCPU_GPR(r5)(r4)
 	stw	r6, VCPU_GPR(r6)(r4)
+	mfspr	r3, \scratch
 	mfctr	r5
-	lis	r6, kvmppc_resume_host@h
+	stw	r3, VCPU_GPR(r4)(r4)
 	stw	r5, VCPU_CTR(r4)
+	mfspr	r3, \srr0
+	lis	r6, kvmppc_resume_host@h
+	stw	r3, VCPU_PC(r4)
 	li	r5, \ivor_nr
 	ori	r6, r6, kvmppc_resume_host@l
 	mtctr	r6
@@ -70,37 +75,35 @@ _GLOBAL(kvmppc_handler_\ivor_nr)
 .endm
 
 _GLOBAL(kvmppc_handlers_start)
-KVM_HANDLER BOOKE_INTERRUPT_CRITICAL
-KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK
-KVM_HANDLER BOOKE_INTERRUPT_DATA_STORAGE
-KVM_HANDLER BOOKE_INTERRUPT_INST_STORAGE
-KVM_HANDLER BOOKE_INTERRUPT_EXTERNAL
-KVM_HANDLER BOOKE_INTERRUPT_ALIGNMENT
-KVM_HANDLER BOOKE_INTERRUPT_PROGRAM
-KVM_HANDLER BOOKE_INTERRUPT_FP_UNAVAIL
-KVM_HANDLER BOOKE_INTERRUPT_SYSCALL
-KVM_HANDLER BOOKE_INTERRUPT_AP_UNAVAIL
-KVM_HANDLER BOOKE_INTERRUPT_DECREMENTER
-KVM_HANDLER BOOKE_INTERRUPT_FIT
-KVM_HANDLER BOOKE_INTERRUPT_WATCHDOG
-KVM_HANDLER BOOKE_INTERRUPT_DTLB_MISS
-KVM_HANDLER BOOKE_INTERRUPT_ITLB_MISS
-KVM_HANDLER BOOKE_INTERRUPT_DEBUG
-KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL
-KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA
-KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND
+KVM_HANDLER BOOKE_INTERRUPT_CRITICAL SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
+KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK  SPRN_SPRG_RSCRATCH_MC SPRN_MCSRR0
+KVM_HANDLER BOOKE_INTERRUPT_DATA_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_INST_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_EXTERNAL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_ALIGNMENT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_PROGRAM SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_FP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_SYSCALL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_AP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_DECREMENTER SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_FIT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_WATCHDOG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
+KVM_HANDLER BOOKE_INTERRUPT_DTLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_ITLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_DEBUG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
+KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA SPRN_SPRG_RSCRATCH0 SPRN_SRR0
+KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND SPRN_SPRG_RSCRATCH0 SPRN_SRR0
 
 _GLOBAL(kvmppc_handler_len)
 	.long kvmppc_handler_1 - kvmppc_handler_0
 
-
 /* Registers:
  *  SPRG_SCRATCH0: guest r4
  *  r4: vcpu pointer
  *  r5: KVM exit number
  */
 _GLOBAL(kvmppc_resume_host)
-	stw	r3, VCPU_GPR(r3)(r4)
 	mfcr	r3
 	stw	r3, VCPU_CR(r4)
 	stw	r7, VCPU_GPR(r7)(r4)
@@ -181,10 +184,6 @@ _GLOBAL(kvmppc_resume_host)
 	stw	r3, VCPU_LR(r4)
 	mfxer	r3
 	stw	r3, VCPU_XER(r4)
-	mfspr	r3, SPRN_SPRG_RSCRATCH0
-	stw	r3, VCPU_GPR(r4)(r4)
-	mfspr	r3, SPRN_SRR0
-	stw	r3, VCPU_PC(r4)
 
 	/* Restore host stack pointer and PID before IVPR, since the host
 	 * exception handlers use them. */