From: David Woodhouse <dwmw@xxxxxxxxxxxx>
This will allow Linux guests (since v6.0) to use the per-vCPU upcall
vector delivered as MSI through the local APIC.
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Reviewed-by: Paul Durrant <paul@xxxxxxx>
---
target/i386/kvm/kvm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index e7c054cc16..8f93a0b5fc 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1889,6 +1889,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
c->eax |= XEN_HVM_CPUID_VCPU_ID_PRESENT;
c->ebx = cs->cpu_index;
}
+
+ if (cs->kvm_state->xen_version >= XEN_VERSION(4, 17)) {
+ c->eax |= XEN_HVM_CPUID_UPCALL_VECTOR;
+ }
}
r = kvm_xen_init_vcpu(cs);
--
2.40.1
