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[RFC PATCH 14/21] i386/xen: implement HYPERVISOR_vcpu_op
From: |
David Woodhouse |
Subject: |
[RFC PATCH 14/21] i386/xen: implement HYPERVISOR_vcpu_op |
Date: |
Mon, 5 Dec 2022 17:31:30 +0000 |
From: Joao Martins <joao.m.martins@oracle.com>
This is simply when guest tries to register a vcpu_info
and since vcpu_info placement is optional in the minimum ABI
therefore we can just fail with -ENOSYS
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
target/i386/xen.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/target/i386/xen.c b/target/i386/xen.c
index 38d4cae3d0..61c9959981 100644
--- a/target/i386/xen.c
+++ b/target/i386/xen.c
@@ -18,6 +18,7 @@
#include "standard-headers/xen/version.h"
#include "standard-headers/xen/memory.h"
#include "standard-headers/xen/hvm/hvm_op.h"
+#include "standard-headers/xen/vcpu.h"
#define PAGE_OFFSET 0xffffffff80000000UL
#define PAGE_SHIFT 12
@@ -196,6 +197,21 @@ static int kvm_xen_hcall_hvm_op(struct kvm_xen_exit *exit,
return HCALL_ERR;
}
+static int kvm_xen_hcall_vcpu_op(struct kvm_xen_exit *exit,
+ int cmd, uint64_t arg)
+{
+ switch (cmd) {
+ case VCPUOP_register_vcpu_info: {
+ /* no vcpu info placement for now */
+ exit->u.hcall.result = -ENOSYS;
+ return 0;
+ }
+ }
+
+ exit->u.hcall.result = -ENOSYS;
+ return HCALL_ERR;
+}
+
static int __kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit)
{
uint16_t code = exit->u.hcall.input;
@@ -206,6 +222,9 @@ static int __kvm_xen_handle_exit(X86CPU *cpu, struct
kvm_xen_exit *exit)
}
switch (code) {
+ case __HYPERVISOR_vcpu_op:
+ return kvm_xen_hcall_vcpu_op(exit, exit->u.hcall.params[0],
+ exit->u.hcall.params[1]);
case __HYPERVISOR_hvm_op:
return kvm_xen_hcall_hvm_op(exit, exit->u.hcall.params[0],
exit->u.hcall.params[1]);
--
2.35.3
- [RFC PATCH 00/21] Xen HVM support under KVM, David Woodhouse, 2022/12/05
- [RFC PATCH 14/21] i386/xen: implement HYPERVISOR_vcpu_op,
David Woodhouse <=
- [RFC PATCH 08/21] xen_platform: exclude vfio-pci from the PCI platform unplug, David Woodhouse, 2022/12/05
- [RFC PATCH 04/21] xen-platform-pci: allow its creation with XEN_EMULATE mode, David Woodhouse, 2022/12/05
- [RFC PATCH 06/21] pc_piix: handle XEN_EMULATE backend init, David Woodhouse, 2022/12/05
- [RFC PATCH 19/21] i386/xen: handle event channel upcall related hypercalls, David Woodhouse, 2022/12/05
- [RFC PATCH 02/21] i386/xen: Add xen-version machine property and init KVM Xen support, David Woodhouse, 2022/12/05
- [RFC PATCH 01/21] include: import xen public headers, David Woodhouse, 2022/12/05
- [RFC PATCH 03/21] i386/kvm: handle Xen HVM cpuid leaves, David Woodhouse, 2022/12/05