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[PATCH v13 46/60] hw/xen: Implement GNTTABOP_query_size
From: |
David Woodhouse |
Subject: |
[PATCH v13 46/60] hw/xen: Implement GNTTABOP_query_size |
Date: |
Thu, 23 Feb 2023 12:45:59 +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_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 b54a94e2bd..1e691ded32 100644
--- a/hw/i386/kvm/xen_gnttab.c
+++ b/hw/i386/kvm/xen_gnttab.c
@@ -211,3 +211,22 @@ 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 e570bd7c26..c0a59b5fc9 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -1204,7 +1204,21 @@ 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
- [PATCH v13 57/60] hw/xen: Support MSI mapping to PIRQ, (continued)
- [PATCH v13 57/60] hw/xen: Support MSI mapping to PIRQ, David Woodhouse, 2023/02/23
- [PATCH v13 54/60] i386/xen: Implement HYPERVISOR_physdev_op, David Woodhouse, 2023/02/23
- [PATCH v13 17/60] i386/xen: implement HYPERVISOR_memory_op, David Woodhouse, 2023/02/23
- [PATCH v13 55/60] hw/xen: Implement emulated PIRQ hypercall support, David Woodhouse, 2023/02/23
- [PATCH v13 12/60] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield, David Woodhouse, 2023/02/23
- [PATCH v13 15/60] i386/xen: add pc_machine_kvm_type to initialize XEN_EMULATE mode, David Woodhouse, 2023/02/23
- [PATCH v13 44/60] hw/xen: Support mapping grant frames, David Woodhouse, 2023/02/23
- [PATCH v13 56/60] hw/xen: Support GSI mapping to PIRQ, David Woodhouse, 2023/02/23
- [PATCH v13 33/60] hw/xen: Implement EVTCHNOP_bind_ipi, David Woodhouse, 2023/02/23
- [PATCH v13 48/60] i386/xen: Reserve Xen special pages for console, xenstore rings, David Woodhouse, 2023/02/23
- [PATCH v13 46/60] hw/xen: Implement GNTTABOP_query_size,
David Woodhouse <=
- [PATCH v13 24/60] i386/xen: implement HYPERVISOR_event_channel_op, David Woodhouse, 2023/02/23
- [PATCH v13 18/60] i386/xen: implement XENMEM_add_to_physmap_batch, David Woodhouse, 2023/02/23
- [PATCH v13 03/60] xen: Add XEN_DISABLED mode and make it default, David Woodhouse, 2023/02/23
- [PATCH v13 11/60] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown, David Woodhouse, 2023/02/23
- [PATCH v13 51/60] hw/xen: Add xen_xenstore device for xenstore emulation, David Woodhouse, 2023/02/23
- [PATCH v13 28/60] i386/xen: Add support for Xen event channel delivery to vCPU, David Woodhouse, 2023/02/23
- [PATCH v13 52/60] hw/xen: Add basic ring handling to xenstore, David Woodhouse, 2023/02/23
- [PATCH v13 19/60] i386/xen: implement HYPERVISOR_hvm_op, David Woodhouse, 2023/02/23
- Re: [PATCH v13 00/60] Xen HVM support under KVM, David Woodhouse, 2023/02/24