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KVM: PPC: booke: Added DECAR support

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Added the decrementer auto-reload support. DECAR is readable
on e500v2/e500mc and later cpus.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Bharat Bhushan 2012-05-20 23:21:23 +00:00 committed by Alexander Graf
parent 32fad281c0
commit 21bd000abf
4 changed files with 13 additions and 0 deletions
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2
arch/powerpc/include/asm/kvm_host.h
View file

@ -418,7 +418,9 @@ struct kvm_vcpu_arch {
ulong mcsrr1;
ulong mcsr;
u32 dec;
#ifdef CONFIG_BOOKE
u32 decar;
#endif
u32 tbl;
u32 tbu;
u32 tcr;

5
arch/powerpc/kvm/booke.c
View file

@ -1267,6 +1267,11 @@ void kvmppc_decrementer_func(unsigned long data)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
if (vcpu->arch.tcr & TCR_ARE) {
vcpu->arch.dec = vcpu->arch.decar;
kvmppc_emulate_dec(vcpu);
}
kvmppc_set_tsr_bits(vcpu, TSR_DIS);
}

3
arch/powerpc/kvm/booke_emulate.c
View file

@ -129,6 +129,9 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
kvmppc_set_tcr(vcpu, spr_val);
break;
case SPRN_DECAR:
vcpu->arch.decar = spr_val;
break;
/*
* Note: SPRG4-7 are user-readable.
* These values are loaded into the real SPRGs when resuming the

3
arch/powerpc/kvm/e500_emulate.c
View file

@ -269,6 +269,9 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
*spr_val = vcpu->arch.shared->mas7_3 >> 32;
break;
#endif
case SPRN_DECAR:
*spr_val = vcpu->arch.decar;
break;
case SPRN_TLB0CFG:
*spr_val = vcpu->arch.tlbcfg[0];
break;