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[PATCH v7 23/51] i386/xen: implement HYPERVISOR_event_channel_op
From: |
David Woodhouse |
Subject: |
[PATCH v7 23/51] i386/xen: implement HYPERVISOR_event_channel_op |
Date: |
Mon, 16 Jan 2023 21:57:37 +0000 |
From: Joao Martins <joao.m.martins@oracle.com>
Additionally set XEN_INTERFACE_VERSION to most recent in order to
exercise the "new" event_channel_op.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
[dwmw2: Ditch event_channel_op_compat which was never available to HVM guests]
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
target/i386/kvm/xen-emu.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index b0ff03dbeb..686e5dfd38 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -27,6 +27,7 @@
#include "standard-headers/xen/memory.h"
#include "standard-headers/xen/hvm/hvm_op.h"
#include "standard-headers/xen/vcpu.h"
+#include "standard-headers/xen/event_channel.h"
#include "xen-compat.h"
@@ -585,6 +586,27 @@ static bool kvm_xen_hcall_vcpu_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
return true;
}
+static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit,
+ int cmd, uint64_t arg)
+{
+ int err = -ENOSYS;
+
+ switch (cmd) {
+ case EVTCHNOP_init_control:
+ case EVTCHNOP_expand_array:
+ case EVTCHNOP_set_priority:
+ /* We do not support FIFO channels at this point */
+ err = -ENOSYS;
+ break;
+
+ default:
+ return false;
+ }
+
+ exit->u.hcall.result = err;
+ return true;
+}
+
static int kvm_xen_soft_reset(void)
{
CPUState *cpu;
@@ -685,6 +707,9 @@ static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct
kvm_xen_exit *exit)
case __HYPERVISOR_sched_op:
return kvm_xen_hcall_sched_op(exit, cpu, exit->u.hcall.params[0],
exit->u.hcall.params[1]);
+ case __HYPERVISOR_event_channel_op:
+ return kvm_xen_hcall_evtchn_op(exit, exit->u.hcall.params[0],
+ exit->u.hcall.params[1]);
case __HYPERVISOR_vcpu_op:
return kvm_xen_hcall_vcpu_op(exit, cpu,
exit->u.hcall.params[0],
--
2.39.0
- [PATCH v7 00/51] Xen support under KVM, David Woodhouse, 2023/01/16
- [PATCH v7 18/51] i386/xen: implement HYPERVISOR_hvm_op, David Woodhouse, 2023/01/16
- [PATCH v7 08/51] xen-platform: allow its creation with XEN_EMULATE mode, David Woodhouse, 2023/01/16
- [PATCH v7 23/51] i386/xen: implement HYPERVISOR_event_channel_op,
David Woodhouse <=
- [PATCH v7 31/51] hw/xen: Implement EVTCHNOP_bind_virq, David Woodhouse, 2023/01/16
- [PATCH v7 07/51] xen-platform: exclude vfio-pci from the PCI platform unplug, David Woodhouse, 2023/01/16
- [PATCH v7 02/51] xen: add CONFIG_XENFV_MACHINE and CONFIG_XEN_EMU options for Xen emulation, David Woodhouse, 2023/01/16
- [PATCH v7 25/51] i386/xen: implement HVMOP_set_param, David Woodhouse, 2023/01/16
- [PATCH v7 40/51] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_PCI_INTX callback, David Woodhouse, 2023/01/16
- [PATCH v7 04/51] i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support, David Woodhouse, 2023/01/16
- [PATCH v7 24/51] i386/xen: implement HVMOP_set_evtchn_upcall_vector, David Woodhouse, 2023/01/16
- [PATCH v7 09/51] i386/xen: handle guest hypercalls, David Woodhouse, 2023/01/16