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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-02-19 13:59:19 +0000 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-02-19 22:02:34 -0500 |
| commit | 3216dceb31c08be08ea98814a9ca5775fa680389 (patch) | |
| tree | 06f0ec957f047a01176b4514c03782fc923bd747 | |
| parent | e7e44e444876478d50630f57b0c31d29f6725020 (diff) | |
| download | op-kernel-dev-3216dceb31c08be08ea98814a9ca5775fa680389.zip op-kernel-dev-3216dceb31c08be08ea98814a9ca5775fa680389.tar.gz | |
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>
| -rw-r--r-- | arch/arm/include/asm/xen/page.h | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 2 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_xen.c | 2 | ||||
| -rw-r--r-- | drivers/xen/grant-table.c | 2 | ||||
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe.c | 2 |
5 files changed, 9 insertions, 3 deletions
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index c6b9096..30cdacb 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -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 */ diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index 472b9b7..6aef9fb 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -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 */ diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c index 19843ec..682210d 100644 --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -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; diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 157c0cc..04c1b2d 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -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 diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 038b71d..3325884 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -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"); |
