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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 <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Stefano Stabellini
2013-02-19 13:59:19 +00:00
committed by Konrad Rzeszutek Wilk
parent e7e44e4448
commit 3216dceb31
5 changed files with 9 additions and 3 deletions
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2
drivers/tty/hvc/hvc_xen.c
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@@ -230,7 +230,7 @@ static int xen_hvm_console_init(void)
if (r < 0 || v == 0)
goto err;
mfn = v;
info->intf = ioremap(mfn << PAGE_SHIFT, PAGE_SIZE);
info->intf = xen_remap(mfn << PAGE_SHIFT, PAGE_SIZE);
if (info->intf == NULL)
goto err;
info->vtermno = HVC_COOKIE;