Merge branch 'linus' into x86/delay

[linux-2.6-omap-h63xx.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 3525ef523a74c6e102954a36ab7763a40f3de444..df40bf74ea751da4a0556a5b6603af1f3989a39b 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -179,50 +179,56 @@ out:
                preempt_enable();
 }
 
-pteval_t xen_pte_val(pte_t pte)
+/* Assume pteval_t is equivalent to all the other *val_t types. */
+static pteval_t pte_mfn_to_pfn(pteval_t val)
+{
+       if (val & _PAGE_PRESENT) {
+               unsigned long mfn = (val & PTE_MASK) >> PAGE_SHIFT;
+               pteval_t flags = val & ~PTE_MASK;
+               val = (mfn_to_pfn(mfn) << PAGE_SHIFT) | flags;
+       }
+
+       return val;
+}
+
+static pteval_t pte_pfn_to_mfn(pteval_t val)
 {
-       pteval_t ret = pte.pte;
+       if (val & _PAGE_PRESENT) {
+               unsigned long pfn = (val & PTE_MASK) >> PAGE_SHIFT;
+               pteval_t flags = val & ~PTE_MASK;
+               val = (pfn_to_mfn(pfn) << PAGE_SHIFT) | flags;
+       }
 
-       if (ret & _PAGE_PRESENT)
-               ret = machine_to_phys(XMADDR(ret)).paddr | _PAGE_PRESENT;
+       return val;
+}
 
-       return ret;
+pteval_t xen_pte_val(pte_t pte)
+{
+       return pte_mfn_to_pfn(pte.pte);
 }
 
 pgdval_t xen_pgd_val(pgd_t pgd)
 {
-       pgdval_t ret = pgd.pgd;
-       if (ret & _PAGE_PRESENT)
-               ret = machine_to_phys(XMADDR(ret)).paddr | _PAGE_PRESENT;
-       return ret;
+       return pte_mfn_to_pfn(pgd.pgd);
 }
 
 pte_t xen_make_pte(pteval_t pte)
 {
-       if (pte & _PAGE_PRESENT) {
-               pte = phys_to_machine(XPADDR(pte)).maddr;
-               pte &= ~(_PAGE_PCD | _PAGE_PWT);
-       }
-
-       return (pte_t){ .pte = pte };
+       pte = pte_pfn_to_mfn(pte);
+       return native_make_pte(pte);
 }
 
 pgd_t xen_make_pgd(pgdval_t pgd)
 {
-       if (pgd & _PAGE_PRESENT)
-               pgd = phys_to_machine(XPADDR(pgd)).maddr;
-
-       return (pgd_t){ pgd };
+       pgd = pte_pfn_to_mfn(pgd);
+       return native_make_pgd(pgd);
 }
 
 pmdval_t xen_pmd_val(pmd_t pmd)
 {
-       pmdval_t ret = native_pmd_val(pmd);
-       if (ret & _PAGE_PRESENT)
-               ret = machine_to_phys(XMADDR(ret)).paddr | _PAGE_PRESENT;
-       return ret;
+       return pte_mfn_to_pfn(pmd.pmd);
 }
-#ifdef CONFIG_X86_PAE
+
 void xen_set_pud(pud_t *ptr, pud_t val)
 {
        struct multicall_space mcs;
@@ -267,17 +273,9 @@ void xen_pmd_clear(pmd_t *pmdp)
 
 pmd_t xen_make_pmd(pmdval_t pmd)
 {
-       if (pmd & _PAGE_PRESENT)
-               pmd = phys_to_machine(XPADDR(pmd)).maddr;
-
+       pmd = pte_pfn_to_mfn(pmd);
        return native_make_pmd(pmd);
 }
-#else  /* !PAE */
-void xen_set_pte(pte_t *ptep, pte_t pte)
-{
-       *ptep = pte;
-}
-#endif /* CONFIG_X86_PAE */
 
 /*
   (Yet another) pagetable walker.  This one is intended for pinning a
@@ -430,8 +428,6 @@ static int pin_page(struct page *page, enum pt_level level)
    read-only, and can be pinned. */
 void xen_pgd_pin(pgd_t *pgd)
 {
-       unsigned level;
-
        xen_mc_batch();
 
        if (pgd_walk(pgd, pin_page, TASK_SIZE)) {
@@ -441,14 +437,7 @@ void xen_pgd_pin(pgd_t *pgd)
                xen_mc_batch();
        }
 
-#ifdef CONFIG_X86_PAE
-       level = MMUEXT_PIN_L3_TABLE;
-#else
-       level = MMUEXT_PIN_L2_TABLE;
-#endif
-
-       xen_do_pin(level, PFN_DOWN(__pa(pgd)));
-
+       xen_do_pin(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(pgd)));
        xen_mc_issue(0);
 }