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

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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: Alexander Graf <agraf@suse.de>
Cc: stable@vger.kernel.org
This commit is contained in:
Alexander Graf 2012-10-06 03:56:35 +02:00
parent 8ca40a70a7
commit e43a028752
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/kvm/44x_emulate.c
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@ -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);