Commit-ID: 49a3b3cbdf1621678a39bd95a3e67c0f858539c7
Gitweb: http://git.kernel.org/tip/49a3b3cbdf1621678a39bd95a3e67c0f858539c7
Author: Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Mon, 3 Nov 2014 14:01:54 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sun, 16 Nov 2014 11:04:25 +0100
x86: Use new cache mode type in mm/iomap_32.c
Instead of directly using the cache mode bits in the pte switch to
using the cache mode type. This requires to change
io_reserve_memtype() as well.
Based-on-patch-by: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: stefan.bader@xxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: konrad.wilk@xxxxxxxxxx
Cc: ville.syrjala@xxxxxxxxxxxxxxx
Cc: david.vrabel@xxxxxxxxxx
Cc: jbeulich@xxxxxxxx
Cc: toshi.kani@xxxxxx
Cc: plagnioj@xxxxxxxxxxxx
Cc: tomi.valkeinen@xxxxxx
Cc: bhelgaas@xxxxxxxxxx
Link: http://lkml.kernel.org/r/1415019724-4317-9-git-send-email-jgross@xxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/include/asm/pat.h | 2 +-
arch/x86/mm/iomap_32.c | 12 +++++++-----
arch/x86/mm/pat.c | 18 ++++++++++--------
3 files changed, 18 insertions(+), 14 deletions(-)
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h
index e2c1668..a8438bc 100644
--- a/arch/x86/include/asm/pat.h
+++ b/arch/x86/include/asm/pat.h
@@ -20,7 +20,7 @@ extern int kernel_map_sync_memtype(u64 base, unsigned long size,
unsigned long flag);
int io_reserve_memtype(resource_size_t start, resource_size_t end,
- unsigned long *type);
+ enum page_cache_mode *pcm);
void io_free_memtype(resource_size_t start, resource_size_t end);
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index 7b179b49..9ca35fc 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -33,17 +33,17 @@ static int is_io_mapping_possible(resource_size_t base, unsigned long size)
int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot)
{
- unsigned long flag = _PAGE_CACHE_WC;
+ enum page_cache_mode pcm = _PAGE_CACHE_MODE_WC;
int ret;
if (!is_io_mapping_possible(base, size))
return -EINVAL;
- ret = io_reserve_memtype(base, base + size, &flag);
+ ret = io_reserve_memtype(base, base + size, &pcm);
if (ret)
return ret;
- *prot = __pgprot(__PAGE_KERNEL | flag);
+ *prot = __pgprot(__PAGE_KERNEL | cachemode2protval(pcm));
return 0;
}
EXPORT_SYMBOL_GPL(iomap_create_wc);
@@ -82,8 +82,10 @@ iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot)
* MTRR is UC or WC. UC_MINUS gets the real intention, of the
* user, which is "WC if the MTRR is WC, UC if you can't do that."
*/
- if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC))
- prot = PAGE_KERNEL_UC_MINUS;
+ if (!pat_enabled && pgprot_val(prot) ==
+ (__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_WC)))
+ prot = __pgprot(__PAGE_KERNEL |
+ cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS));
return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, prot);
}
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 47282c2..6d5a8e3 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -442,25 +442,27 @@ static unsigned long lookup_memtype(u64 paddr)
* On failure, returns non-zero
*/
int io_reserve_memtype(resource_size_t start, resource_size_t end,
- unsigned long *type)
+ enum page_cache_mode *type)
{
resource_size_t size = end - start;
- unsigned long req_type = *type;
- unsigned long new_type;
+ enum page_cache_mode req_type = *type;
+ enum page_cache_mode new_type;
+ unsigned long new_prot;
int ret;
WARN_ON_ONCE(iomem_map_sanity_check(start, size));
- ret = reserve_memtype(start, end, req_type, &new_type);
+ ret = reserve_memtype(start, end, cachemode2protval(req_type),
+ &new_prot);
if (ret)
goto out_err;
- if (!is_new_memtype_allowed(start, size,
- pgprot2cachemode(__pgprot(req_type)),
- pgprot2cachemode(__pgprot(new_type))))
+ new_type = pgprot2cachemode(__pgprot(new_prot));
+
+ if (!is_new_memtype_allowed(start, size, req_type, new_type))
goto out_free;
- if (kernel_map_sync_memtype(start, size, new_type) < 0)
+ if (kernel_map_sync_memtype(start, size, new_prot) < 0)
goto out_free;
*type = new_type;
--
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