[RFC,03/16] KVM: PPC: Book3S HV: check the IRQ controller type

Message ID 20180423164341.15767-4-clg@kaod.org
State RFC
Headers show
  • KVM: PPC: Book3S HV: add XIVE native exploitation mode
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Commit Message

Cédric Le Goater April 23, 2018, 4:43 p.m.
We will have different KVM devices for interrupts, one for the
XICS-over-XIVE mode and one for the XIVE native exploitation
mode. Let's add some checks to make sure we are not mixing the
interfaces in KVM.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
 arch/powerpc/kvm/book3s_xive.c | 6 ++++++
 1 file changed, 6 insertions(+)


diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
index f9818d7d3381..a23ea2f2abe5 100644
--- a/arch/powerpc/kvm/book3s_xive.c
+++ b/arch/powerpc/kvm/book3s_xive.c
@@ -751,6 +751,9 @@  u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu)
 	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
+	if (!kvmppc_xics_enabled(vcpu))
+		return -EPERM;
 	if (!xc)
 		return 0;
@@ -767,6 +770,9 @@  int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval)
 	u8 cppr, mfrr;
 	u32 xisr;
+	if (!kvmppc_xics_enabled(vcpu))
+		return -EPERM;
 	if (!xc || !xive)
 		return -ENOENT;