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[PATCH v7 45/51] hw/xen: Implement GNTTABOP_query_size
From: |
David Woodhouse |
Subject: |
[PATCH v7 45/51] hw/xen: Implement GNTTABOP_query_size |
Date: |
Mon, 16 Jan 2023 21:57:59 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_gnttab.c | 19 +++++++++++++++++++
hw/i386/kvm/xen_gnttab.h | 2 ++
target/i386/kvm/xen-emu.c | 16 +++++++++++++++-
3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c
index cdcfea5be3..5e8fc0184e 100644
--- a/hw/i386/kvm/xen_gnttab.c
+++ b/hw/i386/kvm/xen_gnttab.c
@@ -217,3 +217,22 @@ int xen_gnttab_get_version_op(struct gnttab_get_version
*get)
get->version = 1;
return 0;
}
+
+int xen_gnttab_query_size_op(struct gnttab_query_size *size)
+{
+ XenGnttabState *s = xen_gnttab_singleton;
+
+ if (!s) {
+ return -ENOTSUP;
+ }
+
+ if (size->dom != DOMID_SELF && size->dom != xen_domid) {
+ size->status = GNTST_bad_domain;
+ return 0;
+ }
+
+ size->status = GNTST_okay;
+ size->nr_frames = s->nr_frames;
+ size->max_nr_frames = s->max_frames;
+ return 0;
+}
diff --git a/hw/i386/kvm/xen_gnttab.h b/hw/i386/kvm/xen_gnttab.h
index 79579677ba..3bdbe96191 100644
--- a/hw/i386/kvm/xen_gnttab.h
+++ b/hw/i386/kvm/xen_gnttab.h
@@ -17,7 +17,9 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn);
struct gnttab_set_version;
struct gnttab_get_version;
+struct gnttab_query_size;
int xen_gnttab_set_version_op(struct gnttab_set_version *set);
int xen_gnttab_get_version_op(struct gnttab_get_version *get);
+int xen_gnttab_query_size_op(struct gnttab_query_size *size);
#endif /* QEMU_XEN_GNTTAB_H */
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index fa2d3e5615..9b22209170 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -1175,7 +1175,21 @@ static bool kvm_xen_hcall_gnttab_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
}
break;
}
- case GNTTABOP_query_size:
+ case GNTTABOP_query_size: {
+ struct gnttab_query_size size;
+
+ qemu_build_assert(sizeof(size) == 16);
+ if (kvm_copy_from_gva(cs, arg, &size, sizeof(size))) {
+ err = -EFAULT;
+ break;
+ }
+
+ err = xen_gnttab_query_size_op(&size);
+ if (!err && kvm_copy_to_gva(cs, arg, &size, sizeof(size))) {
+ err = -EFAULT;
+ }
+ break;
+ }
case GNTTABOP_setup_table:
case GNTTABOP_copy:
case GNTTABOP_map_grant_ref:
--
2.39.0
- Re: [PATCH v7 38/51] i386/xen: add monitor commands to test event injection, (continued)
- [PATCH v7 06/51] i386/hvm: Set Xen vCPU ID in KVM, David Woodhouse, 2023/01/16
- [PATCH v7 29/51] hw/xen: Implement EVTCHNOP_close, David Woodhouse, 2023/01/16
- [PATCH v7 36/51] hw/xen: Implement EVTCHNOP_bind_vcpu, David Woodhouse, 2023/01/16
- [PATCH v7 19/51] i386/xen: implement HYPERVISOR_vcpu_op, David Woodhouse, 2023/01/16
- [PATCH v7 28/51] hw/xen: Implement EVTCHNOP_status, David Woodhouse, 2023/01/16
- [PATCH v7 42/51] hw/xen: Add xen_gnttab device for grant table emulation, David Woodhouse, 2023/01/16
- [PATCH v7 20/51] i386/xen: handle VCPUOP_register_vcpu_info, David Woodhouse, 2023/01/16
- [PATCH v7 43/51] hw/xen: Support mapping grant frames, David Woodhouse, 2023/01/16
- [PATCH v7 45/51] hw/xen: Implement GNTTABOP_query_size,
David Woodhouse <=
- [PATCH v7 50/51] hw/xen: Add xen_xenstore device for xenstore emulation, David Woodhouse, 2023/01/16
- [PATCH v7 15/51] i386/xen: manage and save/restore Xen guest long_mode setting, David Woodhouse, 2023/01/16
- [PATCH v7 51/51] hw/xen: Add basic ring handling to xenstore, David Woodhouse, 2023/01/16
- [PATCH v7 01/51] include: import Xen public headers to include/standard-headers/, David Woodhouse, 2023/01/16
- [PATCH v7 33/51] hw/xen: Implement EVTCHNOP_send, David Woodhouse, 2023/01/16
- [PATCH v7 49/51] hw/xen: Add backend implementation of interdomain event channel support, David Woodhouse, 2023/01/16
- [PATCH v7 22/51] i386/xen: handle VCPUOP_register_runstate_memory_area, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 00/19] Emulated Xen PV backend and PIRQ support, David Woodhouse, 2023/01/16