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xen: introduce xen_remap, use it instead of ioremap

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ioremap can't be used to map ring pages on ARM because it uses device
memory caching attributes (MT_DEVICE*).

Introduce a Xen specific abstraction to map ring pages, called
xen_remap, that is defined as ioremap on x86 (no behavioral changes).
On ARM it explicitly calls __arm_ioremap with the right caching
attributes: MT_MEMORY.

Signed-off-by: Stefano Stabellini <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
This commit is contained in:
Stefano Stabellini 2013-02-19 13:59:19 +00:00 • committed by Konrad Rzeszutek Wilk
commit 3216dceb31
5 changed files with 9 additions and 3 deletions
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2
drivers/xen/grant-table.c
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@ -1147,7 +1147,7 @@ static int gnttab_setup(void)
return gnttab_map(0, nr_grant_frames - 1);
if (gnttab_shared.addr == NULL) {
gnttab_shared.addr = ioremap(xen_hvm_resume_frames,
gnttab_shared.addr = xen_remap(xen_hvm_resume_frames,
PAGE_SIZE * max_nr_gframes);
if (gnttab_shared.addr == NULL) {
printk(KERN_WARNING

2
drivers/xen/xenbus/xenbus_probe.c
View file

@ -769,7 +769,7 @@ static int __init xenbus_init(void)
goto out_error;
xen_store_mfn = (unsigned long)v;
xen_store_interface =
ioremap(xen_store_mfn << PAGE_SHIFT, PAGE_SIZE);
xen_remap(xen_store_mfn << PAGE_SHIFT, PAGE_SIZE);
break;
default:
pr_warn("Xenstore state unknown\n");