From: David Woodhouse <dwmw@amazon.co.uk>
Add the array of virq ports to each vCPU so that we can deliver timers,
debug ports, etc. Global virqs are allocated against vCPU 0 initially,
but can be migrated to other vCPUs (when we implement that).
The kernel needs to know about VIRQ_TIMER in order to accelerate timers,
so tell it via KVM_XEN_VCPU_ATTR_TYPE_TIMER. Also save/restore the value
of the singleshot timer across migration, as the kernel will handle the
hypercalls automatically now.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_evtchn.c | 85 ++++++++++++++++++++++++++++++++++++
hw/i386/kvm/xen_evtchn.h | 2 +
include/sysemu/kvm_xen.h | 1 +
target/i386/cpu.h | 4 ++
target/i386/kvm/xen-emu.c | 91 +++++++++++++++++++++++++++++++++++++++
target/i386/machine.c | 2 +
6 files changed, 185 insertions(+)
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index deea7de027..da2f5711dd 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -244,6 +244,11 @@ static bool valid_port(evtchn_port_t port)
}
}
+static bool valid_vcpu(uint32_t vcpu)
+{
+ return !!qemu_get_cpu(vcpu);
+}
+
int xen_evtchn_status_op(struct evtchn_status *status)
{
XenEvtchnState *s = xen_evtchn_singleton;
@@ -494,6 +499,43 @@ static void free_port(XenEvtchnState *s, evtchn_port_t
port)
clear_port_pending(s, port);
}
+static int allocate_port(XenEvtchnState *s, uint32_t vcpu, uint16_t type,
+ uint16_t val, evtchn_port_t *port)
+{
+ evtchn_port_t p = 1;
+
+ for (p = 1; valid_port(p); p++) {
+ if (s->port_table[p].type == EVTCHNSTAT_closed) {
+ s->port_table[p].vcpu = vcpu;
+ s->port_table[p].type = type;
+ s->port_table[p].type_val = val;