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x86, CPA: Add set_pages_arrayuc and set_pages_array_wb

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Add new interfaces:

  set_pages_array_uc()
  set_pages_array_wb()

that can be used change the page attribute for a bunch of pages with
flush etc done once at the end of all the changes. These interfaces
are similar to existing set_memory_array_uc() and set_memory_array_wc().

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: arjan@infradead.org
Cc: eric@anholt.net
Cc: airlied@redhat.com
LKML-Reference: <20090319215358.901545000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
venkatesh.pallipadi@intel.com 2009-03-19 14:51:15 -07:00 committed by Ingo Molnar
parent 9ae2847591
commit 0f3507555f
2 changed files with 66 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
arch/x86/include/asm/cacheflush.h
View file

@ -90,6 +90,9 @@ int set_memory_4k(unsigned long addr, int numpages);
int set_memory_array_uc(unsigned long *addr, int addrinarray);
int set_memory_array_wb(unsigned long *addr, int addrinarray);
int set_pages_array_uc(struct page **pages, int addrinarray);
int set_pages_array_wb(struct page **pages, int addrinarray);
/*
* For legacy compatibility with the old APIs, a few functions
* are provided that work on a "struct page".

63
arch/x86/mm/pageattr.c
View file

@ -920,6 +920,20 @@ static inline int change_page_attr_clear(unsigned long *addr, int numpages,
(array ? CPA_ARRAY : 0), NULL);
}
static inline int cpa_set_pages_array(struct page **pages, int numpages,
pgprot_t mask)
{
return change_page_attr_set_clr(NULL, numpages, mask, __pgprot(0), 0,
CPA_PAGES_ARRAY, pages);
}
static inline int cpa_clear_pages_array(struct page **pages, int numpages,
pgprot_t mask)
{
return change_page_attr_set_clr(NULL, numpages, __pgprot(0), mask, 0,
CPA_PAGES_ARRAY, pages);
}
int _set_memory_uc(unsigned long addr, int numpages)
{
/*
@ -1076,6 +1090,35 @@ int set_pages_uc(struct page *page, int numpages)
}
EXPORT_SYMBOL(set_pages_uc);
int set_pages_array_uc(struct page **pages, int addrinarray)
{
unsigned long start;
unsigned long end;
int i;
int free_idx;
for (i = 0; i < addrinarray; i++) {
start = (unsigned long)page_address(pages[i]);
end = start + PAGE_SIZE;
if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
goto err_out;
}
if (cpa_set_pages_array(pages, addrinarray,
__pgprot(_PAGE_CACHE_UC_MINUS)) == 0) {
return 0; /* Success */
}
err_out:
free_idx = i;
for (i = 0; i < free_idx; i++) {
start = (unsigned long)page_address(pages[i]);
end = start + PAGE_SIZE;
free_memtype(start, end);
}
return -EINVAL;
}
EXPORT_SYMBOL(set_pages_array_uc);
int set_pages_wb(struct page *page, int numpages)
{
unsigned long addr = (unsigned long)page_address(page);
@ -1084,6 +1127,26 @@ int set_pages_wb(struct page *page, int numpages)
}
EXPORT_SYMBOL(set_pages_wb);
int set_pages_array_wb(struct page **pages, int addrinarray)
{
int retval;
unsigned long start;
unsigned long end;
int i;
retval = cpa_clear_pages_array(pages, addrinarray,
__pgprot(_PAGE_CACHE_MASK));
for (i = 0; i < addrinarray; i++) {
start = (unsigned long)page_address(pages[i]);
end = start + PAGE_SIZE;
free_memtype(start, end);
}
return retval;
}
EXPORT_SYMBOL(set_pages_array_wb);
int set_pages_x(struct page *page, int numpages)
{
unsigned long addr = (unsigned long)page_address(page);