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 <[email protected]>
---
arch/x86/include/asm/cacheflush.h | 3 +
arch/x86/mm/pageattr.c | 63 ++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+)
Index: tip/arch/x86/mm/pageattr.c
===================================================================
--- tip.orig/arch/x86/mm/pageattr.c 2009-03-17 11:03:51.000000000 -0700
+++ tip/arch/x86/mm/pageattr.c 2009-03-17 11:04:08.000000000 -0700
@@ -919,6 +919,20 @@ static inline int change_page_attr_clear
(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)
{
/*
@@ -1075,6 +1089,35 @@ int set_pages_uc(struct page *page, int
}
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);
@@ -1083,6 +1126,26 @@ int set_pages_wb(struct page *page, int
}
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);
Index: tip/arch/x86/include/asm/cacheflush.h
===================================================================
--- tip.orig/arch/x86/include/asm/cacheflush.h 2009-03-13 11:51:31.000000000 -0700
+++ tip/arch/x86/include/asm/cacheflush.h 2009-03-17 11:04:08.000000000 -0700
@@ -90,6 +90,9 @@ int set_memory_4k(unsigned long addr, in
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".
--
Commit-ID: 0f3507555f6fa4acbc85a646d6e8766230db38fc
Gitweb: http://git.kernel.org/tip/0f3507555f6fa4acbc85a646d6e8766230db38fc
Author: [email protected] <[email protected]>
AuthorDate: Thu, 19 Mar 2009 14:51:15 -0700
Committer: Ingo Molnar <[email protected]>
CommitDate: Fri, 20 Mar 2009 10:34:49 +0100
x86, CPA: Add set_pages_arrayuc and set_pages_array_wb
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 <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86/include/asm/cacheflush.h | 3 ++
arch/x86/mm/pageattr.c | 63 +++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/cacheflush.h b/arch/x86/include/asm/cacheflush.h
index 5b301b7..b3894bf 100644
--- a/arch/x86/include/asm/cacheflush.h
+++ b/arch/x86/include/asm/cacheflush.h
@@ -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".
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index e5c257f..d71e1b6 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -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);