diff options
| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 13:39:28 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 12:35:16 +0300 |
| commit | eacc56bb9de3e6830ddc169553772cd6de59ee4c (patch) | |
| tree | 7974e33499588bdbd6634c036e28c7a923410022 /arch/powerpc/kvm/powerpc.c | |
| parent | 90c73795afa24890bd2ae4f3b359de04b4147d37 (diff) | |
| download | linux-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 'arch/powerpc/kvm/powerpc.c')
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 8885377ec3e0..b0858ee61460 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -570,6 +570,15 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_PPC_GET_CPU_CHAR: r = 1; break; +#ifdef CONFIG_KVM_XIVE + case KVM_CAP_PPC_IRQ_XIVE: + /* + * Return false until all the XIVE infrastructure is + * in place including support for migration. + */ + r = 0; + break; +#endif case KVM_CAP_PPC_ALLOC_HTAB: r = hv_enabled; @@ -753,6 +762,9 @@ void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) else kvmppc_xics_free_icp(vcpu); break; + case KVMPPC_IRQ_XIVE: + kvmppc_xive_native_cleanup_vcpu(vcpu); + break; } kvmppc_core_vcpu_free(vcpu); @@ -1941,6 +1953,30 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, break; } #endif /* CONFIG_KVM_XICS */ +#ifdef CONFIG_KVM_XIVE + case KVM_CAP_PPC_IRQ_XIVE: { + struct fd f; + struct kvm_device *dev; + + r = -EBADF; + f = fdget(cap->args[0]); + if (!f.file) + break; + + r = -ENXIO; + if (!xive_enabled()) + break; + + r = -EPERM; + dev = kvm_device_from_filp(f.file); + if (dev) + r = kvmppc_xive_native_connect_vcpu(dev, vcpu, + cap->args[1]); + + fdput(f); + break; + } +#endif /* CONFIG_KVM_XIVE */ #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE case KVM_CAP_PPC_FWNMI: r = -EINVAL; |