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From: David Woodhouse <dwmw2@infradead.org>
To: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Paul Durrant" <paul@xen.org>,
	"Joao Martins" <joao.m.martins@oracle.com>,
	"Ankur Arora" <ankur.a.arora@oracle.com>,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>,
	"Thomas Huth" <thuth@redhat.com>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Juan Quintela" <quintela@redhat.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	"Claudio Fontana" <cfontana@suse.de>,
	"Julien Grall" <julien@xen.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
	armbru@redhat.com
Subject: [PATCH v10 38/59] hw/xen: Implement EVTCHNOP_reset
Date: Wed,  1 Feb 2023 14:31:27 +0000	[thread overview]
Message-ID: <20230201143148.1744093-39-dwmw2@infradead.org> (raw)
In-Reply-To: <20230201143148.1744093-1-dwmw2@infradead.org>

From: David Woodhouse <dwmw@amazon.co.uk>

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
 hw/i386/kvm/xen_evtchn.c  | 30 ++++++++++++++++++++++++++++++
 hw/i386/kvm/xen_evtchn.h  |  3 +++
 target/i386/kvm/xen-emu.c | 17 +++++++++++++++++
 3 files changed, 50 insertions(+)

diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index f87b6a3b23..9b1fb47e85 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -12,6 +12,7 @@
 #include "qemu/osdep.h"
 #include "qemu/host-utils.h"
 #include "qemu/module.h"
+#include "qemu/lockable.h"
 #include "qemu/main-loop.h"
 #include "qemu/log.h"
 #include "qapi/error.h"
@@ -745,6 +746,35 @@ static int close_port(XenEvtchnState *s, evtchn_port_t port)
     return 0;
 }
 
+int xen_evtchn_soft_reset(void)
+{
+    XenEvtchnState *s = xen_evtchn_singleton;
+    int i;
+
+    if (!s) {
+        return -ENOTSUP;
+    }
+
+    assert(qemu_mutex_iothread_locked());
+
+    QEMU_LOCK_GUARD(&s->port_lock);
+
+    for (i = 0; i < s->nr_ports; i++) {
+        close_port(s, i);
+    }
+
+    return 0;
+}
+
+int xen_evtchn_reset_op(struct evtchn_reset *reset)
+{
+    if (reset->dom != DOMID_SELF && reset->dom != xen_domid) {
+        return -ESRCH;
+    }
+
+    return xen_evtchn_soft_reset();
+}
+
 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 486b031c82..5d3e03553f 100644
--- a/hw/i386/kvm/xen_evtchn.h
+++ b/hw/i386/kvm/xen_evtchn.h
@@ -13,6 +13,7 @@
 #define QEMU_XEN_EVTCHN_H
 
 void xen_evtchn_create(void);
+int xen_evtchn_soft_reset(void);
 int xen_evtchn_set_callback_param(uint64_t param);
 
 struct evtchn_status;
@@ -24,6 +25,7 @@ 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);
@@ -33,5 +35,6 @@ 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);
 
 #endif /* QEMU_XEN_EVTCHN_H */
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index ec7aefadfc..96261c10a0 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -961,6 +961,18 @@ 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;
     }
@@ -978,6 +990,11 @@ int kvm_xen_soft_reset(void)
 
     trace_kvm_xen_soft_reset();
 
+    err = xen_evtchn_soft_reset();
+    if (err) {
+            return err;
+    }
+
     /*
      * Zero is the reset/startup state for HVM_PARAM_CALLBACK_IRQ. Strictly,
      * it maps to HVM_PARAM_CALLBACK_TYPE_GSI with GSI#0, but Xen refuses to
-- 
2.39.0



  parent reply	other threads:[~2023-02-01 14:44 UTC|newest]

Thread overview: 104+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-01 14:30 [PATCH v10 00/59] Xen HVM support under KVM David Woodhouse
2023-02-01 14:30 ` [PATCH v10 01/59] include: import Xen public headers to hw/xen/interface David Woodhouse
2023-02-01 14:30 ` [PATCH v10 02/59] xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation David Woodhouse
2023-02-01 14:30 ` [PATCH v10 03/59] xen: Add XEN_DISABLED mode and make it default David Woodhouse
2023-02-01 14:30 ` [PATCH v10 04/59] i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support David Woodhouse
2023-02-01 14:30 ` [PATCH v10 05/59] i386/kvm: handle Xen HVM cpuid leaves David Woodhouse
2023-02-01 14:30 ` [PATCH v10 06/59] i386/hvm: Set Xen vCPU ID in KVM David Woodhouse
2023-02-01 14:30 ` [PATCH v10 07/59] xen-platform: exclude vfio-pci from the PCI platform unplug David Woodhouse
2023-02-01 14:30 ` [PATCH v10 08/59] xen-platform: allow its creation with XEN_EMULATE mode David Woodhouse
2023-02-01 14:30 ` [PATCH v10 09/59] i386/xen: handle guest hypercalls David Woodhouse
2023-02-01 14:30 ` [PATCH v10 10/59] i386/xen: implement HYPERVISOR_xen_version David Woodhouse
2023-02-01 14:31 ` [PATCH v10 11/59] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown David Woodhouse
2023-02-01 14:31 ` [PATCH v10 12/59] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield David Woodhouse
2023-02-01 14:31 ` [PATCH v10 13/59] hw/xen: Add xen_overlay device for emulating shared xenheap pages David Woodhouse
2023-02-01 14:31 ` [PATCH v10 14/59] xen: Permit --xen-domid argument when accel is KVM David Woodhouse
2023-02-01 14:31 ` [PATCH v10 15/59] i386/xen: add pc_machine_kvm_type to initialize XEN_EMULATE mode David Woodhouse
2023-02-01 14:31 ` [PATCH v10 16/59] i386/xen: manage and save/restore Xen guest long_mode setting David Woodhouse
2023-02-01 14:31 ` [PATCH v10 17/59] i386/xen: implement HYPERVISOR_memory_op David Woodhouse
2023-02-01 14:31 ` [PATCH v10 18/59] i386/xen: implement XENMEM_add_to_physmap_batch David Woodhouse
2023-02-01 14:31 ` [PATCH v10 19/59] i386/xen: implement HYPERVISOR_hvm_op David Woodhouse
2023-02-01 14:31 ` [PATCH v10 20/59] i386/xen: implement HYPERVISOR_vcpu_op David Woodhouse
2023-02-01 14:31 ` [PATCH v10 21/59] i386/xen: handle VCPUOP_register_vcpu_info David Woodhouse
2023-02-01 14:31 ` [PATCH v10 22/59] i386/xen: handle VCPUOP_register_vcpu_time_info David Woodhouse
2023-02-01 14:31 ` [PATCH v10 23/59] i386/xen: handle VCPUOP_register_runstate_memory_area David Woodhouse
2023-02-01 14:31 ` [PATCH v10 24/59] i386/xen: implement HYPERVISOR_event_channel_op David Woodhouse
2023-02-01 14:31 ` [PATCH v10 25/59] i386/xen: implement HVMOP_set_evtchn_upcall_vector David Woodhouse
2023-02-01 14:31 ` [PATCH v10 26/59] i386/xen: implement HVMOP_set_param David Woodhouse
2023-02-01 14:31 ` [PATCH v10 27/59] hw/xen: Add xen_evtchn device for event channel emulation David Woodhouse
2023-02-01 14:31 ` [PATCH v10 28/59] i386/xen: Add support for Xen event channel delivery to vCPU David Woodhouse
2023-02-01 14:31 ` [PATCH v10 29/59] hw/xen: Implement EVTCHNOP_status David Woodhouse
2023-02-01 14:31 ` [PATCH v10 30/59] hw/xen: Implement EVTCHNOP_close David Woodhouse
2023-02-10 13:25   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 31/59] hw/xen: Implement EVTCHNOP_unmask David Woodhouse
2023-02-10 13:33   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 32/59] hw/xen: Implement EVTCHNOP_bind_virq David Woodhouse
2023-02-10 13:48   ` Paul Durrant
2023-02-15 13:08     ` David Woodhouse
2023-02-01 14:31 ` [PATCH v10 33/59] hw/xen: Implement EVTCHNOP_bind_ipi David Woodhouse
2023-02-10 13:55   ` Paul Durrant
2023-02-10 14:15     ` David Woodhouse
2023-02-10 14:25       ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 34/59] hw/xen: Implement EVTCHNOP_send David Woodhouse
2023-02-10 13:58   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 35/59] hw/xen: Implement EVTCHNOP_alloc_unbound David Woodhouse
2023-02-10 14:13   ` Paul Durrant
2023-02-10 14:17     ` David Woodhouse
2023-02-10 14:28       ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 36/59] hw/xen: Implement EVTCHNOP_bind_interdomain David Woodhouse
2023-02-10 14:30   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 37/59] hw/xen: Implement EVTCHNOP_bind_vcpu David Woodhouse
2023-02-10 14:36   ` Paul Durrant
2023-02-01 14:31 ` David Woodhouse [this message]
2023-02-10 14:44   ` [PATCH v10 38/59] hw/xen: Implement EVTCHNOP_reset Paul Durrant
2023-02-01 14:31 ` [PATCH v10 39/59] i386/xen: add monitor commands to test event injection David Woodhouse
2023-02-10 14:54   ` Paul Durrant
2023-02-10 15:05     ` David Woodhouse
2023-02-10 15:12       ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 40/59] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_GSI callback David Woodhouse
2023-02-10 15:24   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 41/59] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_PCI_INTX callback David Woodhouse
2023-02-10 16:47   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 42/59] kvm/i386: Add xen-gnttab-max-frames property David Woodhouse
2023-02-13 15:17   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 43/59] hw/xen: Add xen_gnttab device for grant table emulation David Woodhouse
2023-02-13 15:21   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 44/59] hw/xen: Support mapping grant frames David Woodhouse
2023-02-13 15:31   ` Paul Durrant
2023-02-14 15:35     ` David Woodhouse
2023-02-14 15:40       ` Paul Durrant
2023-02-14 15:41         ` David Woodhouse
2023-02-01 14:31 ` [PATCH v10 45/59] i386/xen: Implement HYPERVISOR_grant_table_op and GNTTABOP_[gs]et_verson David Woodhouse
2023-02-14  9:59   ` Paul Durrant
2023-02-14 15:33     ` David Woodhouse
2023-02-01 14:31 ` [PATCH v10 46/59] hw/xen: Implement GNTTABOP_query_size David Woodhouse
2023-02-14 10:00   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 47/59] i386/xen: handle PV timer hypercalls David Woodhouse
2023-02-14 10:10   ` Paul Durrant
2023-02-14 15:37     ` David Woodhouse
2023-02-15 13:43     ` David Woodhouse
2023-02-01 14:31 ` [PATCH v10 48/59] i386/xen: Reserve Xen special pages for console, xenstore rings David Woodhouse
2023-02-14 15:35   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 49/59] i386/xen: handle HVMOP_get_param David Woodhouse
2023-02-14 15:47   ` Paul Durrant
2023-02-14 15:50     ` David Woodhouse
2023-02-01 14:31 ` [PATCH v10 50/59] hw/xen: Add backend implementation of interdomain event channel support David Woodhouse
2023-02-14 15:53   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 51/59] hw/xen: Add xen_xenstore device for xenstore emulation David Woodhouse
2023-02-14 15:55   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 52/59] hw/xen: Add basic ring handling to xenstore David Woodhouse
2023-02-14 16:02   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 53/59] hw/xen: Automatically add xen-platform PCI device for emulated Xen guests David Woodhouse
2023-02-14 16:04   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 54/59] i386/xen: Implement HYPERVISOR_physdev_op David Woodhouse
2023-02-14 16:06   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 55/59] hw/xen: Implement emulated PIRQ hypercall support David Woodhouse
2023-02-14 16:10   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 56/59] hw/xen: Support GSI mapping to PIRQ David Woodhouse
2023-02-14 16:12   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 57/59] hw/xen: Support MSI " David Woodhouse
2023-02-14 16:14   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 58/59] kvm/i386: Add xen-evtchn-max-pirq property David Woodhouse
2023-02-14 16:16   ` Paul Durrant
2023-02-01 14:31 ` [PATCH v10 59/59] i386/xen: Document Xen HVM emulation David Woodhouse
2023-02-14 16:20   ` Paul Durrant

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