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i386/xen: Implement HYPERVISOR_grant_table_op and GNTTABOP_[gs]et_verson

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Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-16 23:40:57 +00:00
parent e33cb789af
commit 28b7ae94a2
3 changed files with 96 additions and 0 deletions
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31
hw/i386/kvm/xen_gnttab.c
View file

@ -180,3 +180,34 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn)
return 0;
}
int xen_gnttab_set_version_op(struct gnttab_set_version *set)
{
int ret;
switch (set->version) {
case 1:
ret = 0;
break;
case 2:
/* Behave as before set_version was introduced. */
ret = -ENOSYS;
break;
default:
ret = -EINVAL;
}
set->version = 1;
return ret;
}
int xen_gnttab_get_version_op(struct gnttab_get_version *get)
{
if (get->dom != DOMID_SELF && get->dom != xen_domid) {
return -ESRCH;
}
get->version = 1;
return 0;
}

5
hw/i386/kvm/xen_gnttab.h
View file

@ -15,4 +15,9 @@
void xen_gnttab_create(void);
int xen_gnttab_map_page(uint64_t idx, uint64_t gfn);
struct gnttab_set_version;
struct gnttab_get_version;
int xen_gnttab_set_version_op(struct gnttab_set_version *set);
int xen_gnttab_get_version_op(struct gnttab_get_version *get);
#endif /* QEMU_XEN_GNTTAB_H */