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[PATCH v12 33/60] hw/xen: Implement EVTCHNOP_bind_ipi
From: |
David Woodhouse |
Subject: |
[PATCH v12 33/60] hw/xen: Implement EVTCHNOP_bind_ipi |
Date: |
Mon, 20 Feb 2023 20:47:09 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
---
hw/i386/kvm/xen_evtchn.c | 69 +++++++++++++++++++++++++++++++++++++++
hw/i386/kvm/xen_evtchn.h | 2 ++
target/i386/kvm/xen-emu.c | 15 +++++++++
3 files changed, 86 insertions(+)
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index da2f5711dd..d8527483b9 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -13,6 +13,7 @@
#include "qemu/host-utils.h"
#include "qemu/module.h"
#include "qemu/main-loop.h"
+#include "qemu/log.h"
#include "qapi/error.h"
#include "qom/object.h"
#include "exec/target_page.h"
@@ -231,6 +232,43 @@ static void inject_callback(XenEvtchnState *s, uint32_t
vcpu)
kvm_xen_inject_vcpu_callback_vector(vcpu, type);
}
+static void deassign_kernel_port(evtchn_port_t port)
+{
+ struct kvm_xen_hvm_attr ha;
+ int ret;
+
+ ha.type = KVM_XEN_ATTR_TYPE_EVTCHN;
+ ha.u.evtchn.send_port = port;
+ ha.u.evtchn.flags = KVM_XEN_EVTCHN_DEASSIGN;
+
+ ret = kvm_vm_ioctl(kvm_state, KVM_XEN_HVM_SET_ATTR, &ha);
+ if (ret) {
+ qemu_log_mask(LOG_GUEST_ERROR, "Failed to unbind kernel port %d: %s\n",
+ port, strerror(ret));
+ }
+}
+
+static int assign_kernel_port(uint16_t type, evtchn_port_t port,
+ uint32_t vcpu_id)
+{
+ CPUState *cpu = qemu_get_cpu(vcpu_id);
+ struct kvm_xen_hvm_attr ha;
+
+ if (!cpu) {
+ return -ENOENT;
+ }
+
+ ha.type = KVM_XEN_ATTR_TYPE_EVTCHN;
+ ha.u.evtchn.send_port = port;
+ ha.u.evtchn.type = type;
+ ha.u.evtchn.flags = 0;
+ ha.u.evtchn.deliver.port.port = port;
+ ha.u.evtchn.deliver.port.vcpu = kvm_arch_vcpu_id(cpu);
+ ha.u.evtchn.deliver.port.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL;
+
+ return kvm_vm_ioctl(kvm_state, KVM_XEN_HVM_SET_ATTR, &ha);
+}
+
static bool valid_port(evtchn_port_t port)
{
if (!port) {
@@ -549,6 +587,12 @@ static int close_port(XenEvtchnState *s, evtchn_port_t
port)
p->type_val, 0);
break;
+ case EVTCHNSTAT_ipi:
+ if (s->evtchn_in_kernel) {
+ deassign_kernel_port(port);
+ }
+ break;
+
default:
break;
}
@@ -638,3 +682,28 @@ int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq)
return ret;
}
+
+int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi)
+{
+ XenEvtchnState *s = xen_evtchn_singleton;
+ int ret;
+
+ if (!s) {
+ return -ENOTSUP;
+ }
+
+ if (!valid_vcpu(ipi->vcpu)) {
+ return -ENOENT;
+ }
+
+ qemu_mutex_lock(&s->port_lock);
+
+ ret = allocate_port(s, ipi->vcpu, EVTCHNSTAT_ipi, 0, &ipi->port);
+ if (!ret && s->evtchn_in_kernel) {
+ assign_kernel_port(EVTCHNSTAT_ipi, ipi->port, ipi->vcpu);
+ }
+
+ qemu_mutex_unlock(&s->port_lock);
+
+ return ret;
+}
diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h
index 0ea13dda3a..107f420848 100644
--- a/hw/i386/kvm/xen_evtchn.h
+++ b/hw/i386/kvm/xen_evtchn.h
@@ -19,9 +19,11 @@ struct evtchn_status;
struct evtchn_close;
struct evtchn_unmask;
struct evtchn_bind_virq;
+struct evtchn_bind_ipi;
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);
int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq);
+int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi);
#endif /* QEMU_XEN_EVTCHN_H */
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 0c4988ad63..4a20ccdf78 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -891,6 +891,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
}
break;
}
+ case EVTCHNOP_bind_ipi: {
+ struct evtchn_bind_ipi ipi;
+
+ qemu_build_assert(sizeof(ipi) == 8);
+ if (kvm_copy_from_gva(cs, arg, &ipi, sizeof(ipi))) {
+ err = -EFAULT;
+ break;
+ }
+
+ err = xen_evtchn_bind_ipi_op(&ipi);
+ if (!err && kvm_copy_to_gva(cs, arg, &ipi, sizeof(ipi))) {
+ err = -EFAULT;
+ }
+ break;
+ }
default:
return false;
}
--
2.39.0
- [PATCH v12 30/60] hw/xen: Implement EVTCHNOP_close, (continued)
- [PATCH v12 30/60] hw/xen: Implement EVTCHNOP_close, David Woodhouse, 2023/02/20
- [PATCH v12 26/60] i386/xen: implement HVMOP_set_param, David Woodhouse, 2023/02/20
- [PATCH v12 29/60] hw/xen: Implement EVTCHNOP_status, David Woodhouse, 2023/02/20
- [PATCH v12 23/60] i386/xen: handle VCPUOP_register_runstate_memory_area, David Woodhouse, 2023/02/20
- [PATCH v12 49/60] i386/xen: handle HVMOP_get_param, David Woodhouse, 2023/02/20
- [PATCH v12 48/60] i386/xen: Reserve Xen special pages for console, xenstore rings, David Woodhouse, 2023/02/20
- [PATCH v12 11/60] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown, David Woodhouse, 2023/02/20
- [PATCH v12 14/60] xen: Permit --xen-domid argument when accel is KVM, David Woodhouse, 2023/02/20
- [PATCH v12 34/60] hw/xen: Implement EVTCHNOP_send, David Woodhouse, 2023/02/20
- [PATCH v12 52/60] hw/xen: Add basic ring handling to xenstore, David Woodhouse, 2023/02/20
- [PATCH v12 33/60] hw/xen: Implement EVTCHNOP_bind_ipi,
David Woodhouse <=
- [PATCH v12 04/60] i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support, David Woodhouse, 2023/02/20
- [PATCH v12 19/60] i386/xen: implement HYPERVISOR_hvm_op, David Woodhouse, 2023/02/20
- [PATCH v12 15/60] i386/xen: add pc_machine_kvm_type to initialize XEN_EMULATE mode, David Woodhouse, 2023/02/20
- [PATCH v12 25/60] i386/xen: implement HVMOP_set_evtchn_upcall_vector, David Woodhouse, 2023/02/20
- [PATCH v12 59/60] i386/xen: Document Xen HVM emulation, David Woodhouse, 2023/02/20
- [PATCH v12 18/60] i386/xen: implement XENMEM_add_to_physmap_batch, David Woodhouse, 2023/02/20
- [PATCH v12 43/60] hw/xen: Add xen_gnttab device for grant table emulation, David Woodhouse, 2023/02/20
- [PATCH v12 12/60] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield, David Woodhouse, 2023/02/20
- [PATCH v12 13/60] hw/xen: Add xen_overlay device for emulating shared xenheap pages, David Woodhouse, 2023/02/20
- [PATCH v12 50/60] hw/xen: Add backend implementation of interdomain event channel support, David Woodhouse, 2023/02/20