Commit 38f98824 authored by Mihai Caraman's avatar Mihai Caraman Committed by Alexander Graf
Browse files

KVM: PPC: bookehv: Add EPCR support in mtspr/mfspr emulation 



Add EPCR support in booke mtspr/mfspr emulation. EPCR register is defined only
for 64-bit and HV categories, we will expose it at this point only to 64-bit
virtual processors running on 64-bit HV hosts.
Define a reusable setter function for vcpu's EPCR.

Signed-off-by: default avatarMihai Caraman <mihai.caraman@freescale.com>
[agraf: move HV dependency in the code]
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 95e90b43

arch/powerpc/kvm/booke.c

+12 −0
Original line number Diff line number Diff line
@@ -1473,6 +1473,18 @@ void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) 
{

}



void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)

{

#if defined(CONFIG_64BIT)

	vcpu->arch.epcr = new_epcr;

#ifdef CONFIG_KVM_BOOKE_HV

	vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;

	if (vcpu->arch.epcr  & SPRN_EPCR_ICM)

		vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;

#endif

#endif

}



void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)

{

	vcpu->arch.tcr = new_tcr;

arch/powerpc/kvm/booke.h

+1 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ extern unsigned long kvmppc_booke_handlers; 
void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);

void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);



void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr);

void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);

void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);

void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);

arch/powerpc/kvm/booke_emulate.c

+13 −1
Original line number Diff line number Diff line
@@ -240,7 +240,14 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) 
	case SPRN_MCSR:

		vcpu->arch.mcsr &= ~spr_val;

		break;



#if defined(CONFIG_64BIT)

	case SPRN_EPCR:

		kvmppc_set_epcr(vcpu, spr_val);

#ifdef CONFIG_KVM_BOOKE_HV

		mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr);

#endif

		break;

#endif

	default:

		emulated = EMULATE_FAIL;

	}
@@ -335,6 +342,11 @@ int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) 
	case SPRN_MCSR:

		*spr_val = vcpu->arch.mcsr;

		break;

#if defined(CONFIG_64BIT)

	case SPRN_EPCR:

		*spr_val = vcpu->arch.epcr;

		break;

#endif



	default:

		emulated = EMULATE_FAIL;

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