[Xen-devel] [patch 07/44] paravirt: add an "mm" argument to alloc_pt

[Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxxx>

---
 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)));     \

-- 


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