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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>
This commit is contained in:
Cédric Le Goater 2019-04-18 12:39:40 +02:00 committed by Paul Mackerras
parent 232b984b7d
commit 3fab2d1058
1 changed files with 4 additions and 3 deletions
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7
arch/powerpc/kvm/powerpc.c
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@ -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