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xen/arm: initialize grant_table on ARM

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Initialize the grant table mapping at the address specified at index 0
in the DT under the /xen node.
After the grant table is initialized, call xenbus_probe (if not dom0).

Changes in v2:

- introduce GRANT_TABLE_PHYSADDR;
- remove unneeded initialization of boot_max_nr_grant_frames.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Stefano Stabellini 2012-09-13 12:06:52 +00:00
parent ef61ee0dc7
commit b3b52fd87e
1 changed files with 14 additions and 0 deletions
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14
arch/arm/xen/enlighten.c
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@ -1,8 +1,12 @@
#include <xen/xen.h>
#include <xen/grant_table.h>
#include <xen/hvm.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
#include <xen/interface/hvm/params.h>
#include <xen/features.h>
#include <xen/platform_pci.h>
#include <xen/xenbus.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#include <linux/module.h>
@ -42,6 +46,7 @@ EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
* see Documentation/devicetree/bindings/arm/xen.txt for the
* documentation of the Xen Device Tree format.
*/
#define GRANT_TABLE_PHYSADDR 0
static int __init xen_guest_init(void)
{
struct xen_add_to_physmap xatp;
@ -51,6 +56,7 @@ static int __init xen_guest_init(void)
const char *s = NULL;
const char *version = NULL;
const char *xen_prefix = "xen,xen-";
struct resource res;
node = of_find_compatible_node(NULL, NULL, "xen,xen");
if (!node) {
@ -65,6 +71,9 @@ static int __init xen_guest_init(void)
pr_debug("Xen version not found\n");
return 0;
}
if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res))
return 0;
xen_hvm_resume_frames = res.start >> PAGE_SHIFT;
xen_domain_type = XEN_HVM_DOMAIN;
xen_setup_features();
@ -98,6 +107,11 @@ static int __init xen_guest_init(void)
* is required to use VCPUOP_register_vcpu_info to place vcpu info
* for secondary CPUs as they are brought up. */
per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
gnttab_init();
if (!xen_initial_domain())
xenbus_probe(NULL);
return 0;
}
core_initcall(xen_guest_init);