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KVM: PPC: booke: Added debug handler

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Installed debug handler will be used for guest debug support
and debug facility emulation features (patches for these
features will follow this patch).

Signed-off-by: Liu Yu <yu.liu@freescale.com>
[bharat.bhushan@freescale.com: Substantial changes]
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Bharat Bhushan 2013-02-27 18:13:10 +00:00 committed by Alexander Graf
parent 78accda4f8
commit 15b708beee
3 changed files with 41 additions and 3 deletions
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1
arch/powerpc/include/asm/kvm_host.h
View file

@ -504,6 +504,7 @@ struct kvm_vcpu_arch {
u32 tlbcfg[4];
u32 mmucfg;
u32 epr;
u32 crit_save;
struct kvmppc_booke_debug_reg dbg_reg;
#endif
gpa_t paddr_accessed;

1
arch/powerpc/kernel/asm-offsets.c
View file

@ -596,6 +596,7 @@ int main(void)
DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst));
DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear));
DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr));
DEFINE(VCPU_CRIT_SAVE, offsetof(struct kvm_vcpu, arch.crit_save));
#endif /* CONFIG_PPC_BOOK3S */
#endif /* CONFIG_KVM */

42
arch/powerpc/kvm/booke_interrupts.S
View file

@ -54,8 +54,7 @@
(1<<BOOKE_INTERRUPT_DTLB_MISS) | \
(1<<BOOKE_INTERRUPT_ALIGNMENT))
.macro KVM_HANDLER ivor_nr scratch srr0
_GLOBAL(kvmppc_handler_\ivor_nr)
.macro __KVM_HANDLER ivor_nr scratch srr0
/* Get pointer to vcpu and record exit number. */
mtspr \scratch , r4
mfspr r4, SPRN_SPRG_THREAD
@ -76,6 +75,43 @@ _GLOBAL(kvmppc_handler_\ivor_nr)
bctr
.endm
.macro KVM_HANDLER ivor_nr scratch srr0
_GLOBAL(kvmppc_handler_\ivor_nr)
__KVM_HANDLER \ivor_nr \scratch \srr0
.endm
.macro KVM_DBG_HANDLER ivor_nr scratch srr0
_GLOBAL(kvmppc_handler_\ivor_nr)
mtspr \scratch, r4
mfspr r4, SPRN_SPRG_THREAD
lwz r4, THREAD_KVM_VCPU(r4)
stw r3, VCPU_CRIT_SAVE(r4)
mfcr r3
mfspr r4, SPRN_CSRR1
andi. r4, r4, MSR_PR
bne 1f
/* debug interrupt happened in enter/exit path */
mfspr r4, SPRN_CSRR1
rlwinm r4, r4, 0, ~MSR_DE
mtspr SPRN_CSRR1, r4
lis r4, 0xffff
ori r4, r4, 0xffff
mtspr SPRN_DBSR, r4
mfspr r4, SPRN_SPRG_THREAD
lwz r4, THREAD_KVM_VCPU(r4)
mtcr r3
lwz r3, VCPU_CRIT_SAVE(r4)
mfspr r4, \scratch
rfci
1: /* debug interrupt happened in guest */
mtcr r3
mfspr r4, SPRN_SPRG_THREAD
lwz r4, THREAD_KVM_VCPU(r4)
lwz r3, VCPU_CRIT_SAVE(r4)
mfspr r4, \scratch
__KVM_HANDLER \ivor_nr \scratch \srr0
.endm
.macro KVM_HANDLER_ADDR ivor_nr
.long kvmppc_handler_\ivor_nr
.endm
@ -100,7 +136,7 @@ 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_DBG_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