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authorCédric Le Goater <clg@kaod.org>2019-04-18 13:39:28 +0300
committerPaul Mackerras <paulus@ozlabs.org>2019-04-30 12:35:16 +0300
commiteacc56bb9de3e6830ddc169553772cd6de59ee4c (patch)
tree7974e33499588bdbd6634c036e28c7a923410022 /Documentation/virtual
parent90c73795afa24890bd2ae4f3b359de04b4147d37 (diff)
downloadlinux-eacc56bb9de3e6830ddc169553772cd6de59ee4c.tar.xz
KVM: PPC: Book3S HV: XIVE: Introduce a new capability KVM_CAP_PPC_IRQ_XIVE
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>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 67068c47c591..e38eb17b7be6 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -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
------------------------------------------