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xen: introduce xen_remap, use it instead of ioremap 

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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4
arch/arm/include/asm/xen/page.h
View File

@ -1,6 +1,7 @@
#ifndef _ASM_ARM_XEN_PAGE_H
#define _ASM_ARM_XEN_PAGE_H
#include <asm/mach/map.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@ -86,4 +87,7 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
return __set_phys_to_machine(pfn, mfn);
}
#define xen_remap(cookie, size) __arm_ioremap((cookie), (size), MT_MEMORY);
#endif /* _ASM_ARM_XEN_PAGE_H */

2
arch/x86/include/asm/xen/page.h
View File

@ -212,4 +212,6 @@ unsigned long arbitrary_virt_to_mfn(void *vaddr);
void make_lowmem_page_readonly(void *vaddr);
void make_lowmem_page_readwrite(void *vaddr);
#define xen_remap(cookie, size) ioremap((cookie), (size));
#endif /* _ASM_X86_XEN_PAGE_H */

2
drivers/tty/hvc/hvc_xen.c
View File

@ -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;

2
drivers/xen/grant-table.c
View File

@ -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");