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[RFC PATCH v3 34/38] hw/xen: Implement EVTCHNOP_reset
From: |
David Woodhouse |
Subject: |
[RFC PATCH v3 34/38] hw/xen: Implement EVTCHNOP_reset |
Date: |
Fri, 16 Dec 2022 00:41:13 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_evtchn.c | 24 ++++++++++++++++++++++++
hw/i386/kvm/xen_evtchn.h | 2 ++
target/i386/kvm/xen-emu.c | 12 ++++++++++++
3 files changed, 38 insertions(+)
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index 8cdc26afb7..225d984371 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -643,6 +643,30 @@ static int close_port(XenEvtchnState *s, evtchn_port_t
port)
return 0;
}
+int xen_evtchn_reset_op(struct evtchn_reset *reset)
+{
+ XenEvtchnState *s = xen_evtchn_singleton;
+ int i;
+
+ if (!s) {
+ return -ENOTSUP;
+ }
+
+ if (reset->dom != DOMID_SELF && reset->dom != xen_domid) {
+ return -ESRCH;
+ }
+
+ qemu_mutex_lock(&s->port_lock);
+
+ for (i = 0; i < s->nr_ports; i++) {
+ close_port(s, i);
+ }
+
+ qemu_mutex_unlock(&s->port_lock);
+
+ return 0;
+}
+
int xen_evtchn_close_op(struct evtchn_close *close)
{
XenEvtchnState *s = xen_evtchn_singleton;
diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h
index 99d5292c1e..b93f534bee 100644
--- a/hw/i386/kvm/xen_evtchn.h
+++ b/hw/i386/kvm/xen_evtchn.h
@@ -22,6 +22,7 @@ struct evtchn_send;
struct evtchn_alloc_unbound;
struct evtchn_bind_interdomain;
struct evtchn_bind_vcpu;
+struct evtchn_reset;
int xen_evtchn_status_op(struct evtchn_status *status);
int xen_evtchn_close_op(struct evtchn_close *close);
int xen_evtchn_unmask_op(struct evtchn_unmask *unmask);
@@ -31,3 +32,4 @@ int xen_evtchn_send_op(struct evtchn_send *send);
int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc);
int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain
*interdomain);
int xen_evtchn_bind_vcpu_op(struct evtchn_bind_vcpu *vcpu);
+int xen_evtchn_reset_op(struct evtchn_reset *reset);
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 58fa82682f..055afba627 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -854,6 +854,18 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
err = xen_evtchn_bind_vcpu_op(&vcpu);
break;
}
+ case EVTCHNOP_reset: {
+ struct evtchn_reset reset;
+
+ qemu_build_assert(sizeof(reset) == 2);
+ if (kvm_copy_from_gva(cs, arg, &reset, sizeof(reset))) {
+ err = -EFAULT;
+ break;
+ }
+
+ err = xen_evtchn_reset_op(&reset);
+ break;
+ }
default:
return false;
}
--
2.35.3
- [RFC PATCH v3 13/38] i386/xen: manage and save/restore Xen guest long_mode setting, (continued)
- [RFC PATCH v3 13/38] i386/xen: manage and save/restore Xen guest long_mode setting, David Woodhouse, 2022/12/15
- [RFC PATCH v3 05/38] i386/kvm: handle Xen HVM cpuid leaves, David Woodhouse, 2022/12/15
- [RFC PATCH v3 01/38] include: import xen public headers, David Woodhouse, 2022/12/15
- [RFC PATCH v3 18/38] i386/xen: handle VCPUOP_register_vcpu_info, David Woodhouse, 2022/12/15
- [RFC PATCH v3 10/38] i386/xen: implement HYPERCALL_xen_version, David Woodhouse, 2022/12/15
- [RFC PATCH v3 07/38] xen-platform: allow its creation with XEN_EMULATE mode, David Woodhouse, 2022/12/15
- [RFC PATCH v3 34/38] hw/xen: Implement EVTCHNOP_reset,
David Woodhouse <=