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hw/xen: populate store frontend nodes with XenStore PFN/port

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This is kind of redundant since without being able to get these through
some other method (HVMOP_get_param) the guest wouldn't be able to access
XenStore in order to find them.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2023-10-12 10:59:45 +01:00
parent 8473607bcf
commit d388c9f53b
1 changed files with 11 additions and 0 deletions
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11
hw/i386/kvm/xen_xenstore.c
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@ -1434,6 +1434,7 @@ static void alloc_guest_port(XenXenstoreState *s)
int xen_xenstore_reset(void)
{
XenXenstoreState *s = xen_xenstore_singleton;
GList *perms;
int err;
if (!s) {
@ -1461,6 +1462,16 @@ int xen_xenstore_reset(void)
}
s->be_port = err;
/* Create frontend store nodes */
perms = g_list_append(NULL, xs_perm_as_string(XS_PERM_NONE, DOMID_QEMU));
perms = g_list_append(perms, xs_perm_as_string(XS_PERM_READ, xen_domid));
relpath_printf(s, perms, "store/port", "%u", s->guest_port);
relpath_printf(s, perms, "store/ring-ref", "%lu",
XEN_SPECIAL_PFN(XENSTORE));
g_list_free_full(perms, g_free);
/*
* We don't actually access the guest's page through the grant, because
* this isn't real Xen, and we can just use the page we gave it in the