summaryrefslogtreecommitdiffstats
path: root/arch/arm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/xen/enlighten.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 7619fbffcea2..49bb6757d031 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -59,6 +59,9 @@ unsigned long xen_released_pages;
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
static __read_mostly unsigned int xen_events_irq;
+static __read_mostly phys_addr_t xen_grant_frames;
+
+#define GRANT_TABLE_INDEX 0
uint32_t xen_start_flags;
EXPORT_SYMBOL(xen_start_flags);
@@ -303,6 +306,7 @@ static void __init xen_acpi_guest_init(void)
static void __init xen_dt_guest_init(void)
{
struct device_node *xen_node;
+ struct resource res;
xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
if (!xen_node) {
@@ -311,13 +315,19 @@ static void __init xen_dt_guest_init(void)
}
xen_events_irq = irq_of_parse_and_map(xen_node, 0);
+
+ if (of_address_to_resource(xen_node, GRANT_TABLE_INDEX, &res)) {
+ pr_err("Xen grant table region is not found\n");
+ return;
+ }
+ xen_grant_frames = res.start;
}
static int __init xen_guest_init(void)
{
struct xen_add_to_physmap xatp;
struct shared_info *shared_info_page = NULL;
- int cpu;
+ int rc, cpu;
if (!xen_domain())
return 0;
@@ -370,12 +380,16 @@ static int __init xen_guest_init(void)
for_each_possible_cpu(cpu)
per_cpu(xen_vcpu_id, cpu) = cpu;
- xen_auto_xlat_grant_frames.count = gnttab_max_grant_frames();
- if (xen_xlate_map_ballooned_pages(&xen_auto_xlat_grant_frames.pfn,
- &xen_auto_xlat_grant_frames.vaddr,
- xen_auto_xlat_grant_frames.count)) {
+ if (!xen_grant_frames) {
+ xen_auto_xlat_grant_frames.count = gnttab_max_grant_frames();
+ rc = xen_xlate_map_ballooned_pages(&xen_auto_xlat_grant_frames.pfn,
+ &xen_auto_xlat_grant_frames.vaddr,
+ xen_auto_xlat_grant_frames.count);
+ } else
+ rc = gnttab_setup_auto_xlat_frames(xen_grant_frames);
+ if (rc) {
free_percpu(xen_vcpu_info);
- return -ENOMEM;
+ return rc;
}
gnttab_init();