[patch 01/33] xen: paravirt: add an "mm" argument to alloc_pt

Jeremy Fitzhardinge
2007-05-22T15:23:55Z

[-- Attachment #1: paravirt-add-mm-to-alloc_pt.patch --]
[-- Type: text/plain, Size: 3816 bytes --]

It's useful to know which mm is allocating a pagetable. Xen uses this
to determine whether the pagetable being added to is pinned or not.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

---
arch/i386/kernel/vmi.c | 2 +-
arch/i386/mm/init.c | 2 +-
arch/i386/mm/pageattr.c | 2 +-
include/asm-i386/paravirt.h | 8 ++++----
include/asm-i386/pgalloc.h | 6 +++---
5 files changed, 10 insertions(+), 10 deletions(-)

===================================================================
--- a/arch/i386/kernel/vmi.c
+++ b/arch/i386/kernel/vmi.c
@@ -361,7 +361,7 @@ static void *vmi_kmap_atomic_pte(struct
}
#endif

-static void vmi_allocate_pt(u32 pfn)
+static void vmi_allocate_pt(struct mm_struct *mm, u32 pfn)
{
vmi_set_page_type(pfn, VMI_PAGE_L1);
vmi_ops.allocate_page(pfn, VMI_PAGE_L1, 0, 0, 0);
===================================================================
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -87,7 +87,7 @@ static pte_t * __init one_page_table_ini
if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);

- paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
+ paravirt_alloc_pt(&init_mm, __pa(page_table) >> PAGE_SHIFT);
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
BUG_ON(page_table != pte_offset_kernel(pmd, 0));
}
===================================================================
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@@ -60,7 +60,7 @@ static struct page *split_large_page(uns
address = __pa(address);
addr = address & LARGE_PAGE_MASK;
pbase = (pte_t *)page_address(base);
- paravirt_alloc_pt(page_to_pfn(base));
+ paravirt_alloc_pt(&init_mm, page_to_pfn(base));
for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT,
addr == address ? prot : ref_prot));
===================================================================
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -173,7 +175,7 @@ struct paravirt_ops
unsigned long va);

/* Hooks for allocating/releasing pagetable pages */
- void (*alloc_pt)(u32 pfn);
+ void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
void (*alloc_pd)(u32 pfn);
void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
void (*release_pt)(u32 pfn);
@@ -738,9 +746,9 @@ static inline void flush_tlb_others(cpum
PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
}

-static inline void paravirt_alloc_pt(unsigned pfn)
-{
- PVOP_VCALL1(alloc_pt, pfn);
+static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
+{
+ PVOP_VCALL2(alloc_pt, mm, pfn);
}
static inline void paravirt_release_pt(unsigned pfn)
{
===================================================================
--- a/include/asm-i386/pgalloc.h
+++ b/include/asm-i386/pgalloc.h
@@ -7,7 +7,7 @@
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
-#define paravirt_alloc_pt(pfn) do { } while (0)
+#define paravirt_alloc_pt(mm, pfn) do { } while (0)
#define paravirt_alloc_pd(pfn) do { } while (0)
#define paravirt_alloc_pd(pfn) do { } while (0)
#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
@@ -17,13 +17,13 @@

#define pmd_populate_kernel(mm, pmd, pte) \
do { \
- paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT); \
+ paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
} while (0)

#define pmd_populate(mm, pmd, pte) \
do { \
- paravirt_alloc_pt(page_to_pfn(pte)); \
+ paravirt_alloc_pt(mm, page_to_pfn(pte)); \
set_pmd(pmd, __pmd(_PAGE_TABLE + \
((unsigned long long)page_to_pfn(pte) << \
(unsigned long long) PAGE_SHIFT))); \

--