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authorCédric Le Goater <clg@kaod.org>2019-04-18 12:39:40 +0200
committerPaul Mackerras <paulus@ozlabs.org>2019-04-30 19:35:16 +1000
commit3fab2d10588e09abd4bd7b9bacce5e4e435993f6 (patch)
tree17ed617e8c7e1cb189d53400eab7a0f8569aecd1
parent232b984b7d55e68971962f07f1dd1d1eb1be52e0 (diff)
downloadlinux-stericsson-3fab2d10588e09abd4bd7b9bacce5e4e435993f6.tar.gz
KVM: PPC: Book3S HV: XIVE: Activate XIVE exploitation mode
Full support for the XIVE native exploitation mode is now available, advertise the capability KVM_CAP_PPC_IRQ_XIVE for guests running on PowerNV KVM Hypervisors only. Support for nested guests (pseries KVM Hypervisor) is not yet available. XIVE should also have been activated which is default setting on POWER9 systems running a recent Linux kernel. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
-rw-r--r--arch/powerpc/kvm/powerpc.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b0858ee61460..f54926c78320 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -573,10 +573,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
#ifdef CONFIG_KVM_XIVE
case KVM_CAP_PPC_IRQ_XIVE:
/*
- * Return false until all the XIVE infrastructure is
- * in place including support for migration.
+ * We need XIVE to be enabled on the platform (implies
+ * a POWER9 processor) and the PowerNV platform, as
+ * nested is not yet supported.
*/
- r = 0;
+ r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE);
break;
#endif