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Commit e43a0287 authored by Alexander Graf's avatar Alexander Graf
Browse files

KVM: PPC: 44x: fix DCR read/write 



When remembering the direction of a DCR transaction, we should write
to the same variable that we interpret on later when doing vcpu_run
again.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
Cc: stable@vger.kernel.org
parent 8ca40a70

arch/powerpc/kvm/44x_emulate.c

+2 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ static int emulate_mtdcr(struct kvm_vcpu *vcpu, int rs, int dcrn) 
		vcpu->run->dcr.dcrn = dcrn;

		vcpu->run->dcr.data = kvmppc_get_gpr(vcpu, rs);

		vcpu->run->dcr.is_write = 1;

		vcpu->arch.dcr_is_write = 1;

		vcpu->arch.dcr_needed = 1;

		kvmppc_account_exit(vcpu, DCR_EXITS);

		return EMULATE_DO_DCR;
@@ -80,6 +81,7 @@ static int emulate_mfdcr(struct kvm_vcpu *vcpu, int rt, int dcrn) 
		vcpu->run->dcr.dcrn = dcrn;

		vcpu->run->dcr.data =  0;

		vcpu->run->dcr.is_write = 0;

		vcpu->arch.dcr_is_write = 0;

		vcpu->arch.io_gpr = rt;

		vcpu->arch.dcr_needed = 1;

		kvmppc_account_exit(vcpu, DCR_EXITS);