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KVM: PPC: Book3S HV: XIVE: Introduce a new capability KVM_CAP_PPC_IRQ_XIVE

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The user interface exposes a new capability KVM_CAP_PPC_IRQ_XIVE to
let QEMU connect the vCPU presenters to the XIVE KVM device if
required. The capability is not advertised for now as the full support
for the XIVE native exploitation mode is not yet available. When this
is case, the capability will be advertised on PowerNV Hypervisors
only. Nested guests (pseries KVM Hypervisor) are not supported.

Internally, the interface to the new KVM device is protected with a
new interrupt mode: KVMPPC_IRQ_XIVE.

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 12:39:28 +02:00 • committed by Paul Mackerras
parent 90c73795af
commit eacc56bb9d
8 changed files with 268 additions and 41 deletions
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9
Documentation/virtual/kvm/api.txt
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@ -4504,6 +4504,15 @@ struct kvm_sync_regs {
struct kvm_vcpu_events events;
};
6.75 KVM_CAP_PPC_IRQ_XIVE
Architectures: ppc
Target: vcpu
Parameters: args[0] is the XIVE device fd
args[1] is the XIVE CPU number (server ID) for this vcpu
This capability connects the vcpu to an in-kernel XIVE device.
7. Capabilities that can be enabled on VMs
------------------------------------------