x86: add mm parameter to paravirt_alloc_pd

Add mm to paravirt_alloc_pd, partly to make it consistent with
paravirt_alloc_pt, and because later changes will make use of it.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/vmi_32.c

@@ -398,7 +398,7 @@ static void vmi_allocate_pt(struct mm_struct *mm, u32 pfn)
 	vmi_ops.allocate_page(pfn, VMI_PAGE_L1, 0, 0, 0);
 }
 
-static void vmi_allocate_pd(u32 pfn)
+static void vmi_allocate_pd(struct mm_struct *mm, u32 pfn)
 {
  	/*
 	 * This call comes in very early, before mem_map is setup.

arch/x86/mm/init_32.c

@@ -65,7 +65,7 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
 	if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
 		pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
 
-		paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
+		paravirt_alloc_pd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
 		set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
 		pud = pud_offset(pgd, 0);
 		if (pmd_table != pmd_offset(pud, 0))
@@ -365,7 +365,7 @@ void __init native_pagetable_setup_start(pgd_t *base)
 	memset(&base[USER_PTRS_PER_PGD], 0,
 	       KERNEL_PGD_PTRS * sizeof(pgd_t));
 #else
-	paravirt_alloc_pd(__pa(swapper_pg_dir) >> PAGE_SHIFT);
+	paravirt_alloc_pd(&init_mm, __pa(base) >> PAGE_SHIFT);
 #endif
 }
 

arch/x86/mm/pgtable_32.c

@@ -330,13 +330,15 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 	if (PTRS_PER_PMD == 1 || !pgd)
 		return pgd;
 
+	mm->pgd = pgd;		/* so that alloc_pd can use it */
+
  	for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
 		pmd_t *pmd = pmd_cache_alloc(i);
 
 		if (!pmd)
 			goto out_oom;
 
-		paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+		paravirt_alloc_pd(mm, __pa(pmd) >> PAGE_SHIFT);
 		set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
 	}
 	return pgd;

include/asm-x86/paravirt.h

@@ -221,7 +221,7 @@ struct pv_mmu_ops {
 
 	/* Hooks for allocating/releasing pagetable pages */
 	void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
-	void (*alloc_pd)(u32 pfn);
+	void (*alloc_pd)(struct mm_struct *mm, u32 pfn);
 	void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 	void (*release_pt)(u32 pfn);
 	void (*release_pd)(u32 pfn);
@@ -903,9 +903,9 @@ static inline void paravirt_release_pt(unsigned pfn)
 	PVOP_VCALL1(pv_mmu_ops.release_pt, pfn);
 }
 
-static inline void paravirt_alloc_pd(unsigned pfn)
+static inline void paravirt_alloc_pd(struct mm_struct *mm, unsigned pfn)
 {
-	PVOP_VCALL1(pv_mmu_ops.alloc_pd, pfn);
+	PVOP_VCALL2(pv_mmu_ops.alloc_pd, mm, pfn);
 }
 
 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,

include/asm-x86/pgalloc_32.h

@@ -8,8 +8,7 @@
 #include <asm/paravirt.h>
 #else
 #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(mm, pfn) do { } while (0)
 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
 #define paravirt_release_pt(pfn) do { } while (0)
 #define paravirt_release_pd(pfn) do { } while (0)