mirror of https://github.com/xemu-project/xemu.git
hw/xen: Implement GNTTABOP_query_size
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Paul Durrant <paul@xen.org>
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@ -211,3 +211,22 @@ int xen_gnttab_get_version_op(struct gnttab_get_version *get)
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get->version = 1;
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return 0;
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}
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int xen_gnttab_query_size_op(struct gnttab_query_size *size)
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{
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XenGnttabState *s = xen_gnttab_singleton;
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if (!s) {
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return -ENOTSUP;
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}
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if (size->dom != DOMID_SELF && size->dom != xen_domid) {
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size->status = GNTST_bad_domain;
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return 0;
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}
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size->status = GNTST_okay;
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size->nr_frames = s->nr_frames;
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size->max_nr_frames = s->max_frames;
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return 0;
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}
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@ -17,7 +17,9 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn);
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struct gnttab_set_version;
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struct gnttab_get_version;
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struct gnttab_query_size;
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int xen_gnttab_set_version_op(struct gnttab_set_version *set);
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int xen_gnttab_get_version_op(struct gnttab_get_version *get);
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int xen_gnttab_query_size_op(struct gnttab_query_size *size);
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#endif /* QEMU_XEN_GNTTAB_H */
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@ -1207,7 +1207,21 @@ static bool kvm_xen_hcall_gnttab_op(struct kvm_xen_exit *exit, X86CPU *cpu,
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}
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break;
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}
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case GNTTABOP_query_size:
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case GNTTABOP_query_size: {
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struct gnttab_query_size size;
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qemu_build_assert(sizeof(size) == 16);
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if (kvm_copy_from_gva(cs, arg, &size, sizeof(size))) {
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err = -EFAULT;
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break;
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}
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err = xen_gnttab_query_size_op(&size);
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if (!err && kvm_copy_to_gva(cs, arg, &size, sizeof(size))) {
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err = -EFAULT;
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}
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break;
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}
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case GNTTABOP_setup_table:
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case GNTTABOP_copy:
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case GNTTABOP_map_grant_ref:
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