Merge branch 'x86/fixmap' into x86/devel

Conflicts:

	arch/x86/mm/init_64.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 59 insertions, 33 deletions

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index f1ab0f72700..e9b50453721 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -420,6 +420,8 @@ struct pv_mmu_ops pv_mmu_ops = {
 		.enter = paravirt_nop,
 		.leave = paravirt_nop,
 	},
+
+	.set_fixmap = native_set_fixmap,
 };
 
 EXPORT_SYMBOL_GPL(pv_time_ops);
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 18c6a006e40..97c2bc741e9 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -148,15 +148,15 @@ static __init void *spp_getpage(void)
 	return ptr;
 }
 
-static __init void
-set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
+void
+set_pte_vaddr(unsigned long vaddr, pte_t new_pte)
 {
 	pgd_t *pgd;
 	pud_t *pud;
 	pmd_t *pmd;
-	pte_t *pte, new_pte;
+	pte_t *pte;
 
-	pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys);
+	pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte));
 
 	pgd = pgd_offset_k(vaddr);
 	if (pgd_none(*pgd)) {
@@ -183,7 +183,6 @@ set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
 			return;
 		}
 	}
-	new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
 
 	pte = pte_offset_kernel(pmd, vaddr);
 	if (!pte_none(*pte) && pte_val(new_pte) &&
@@ -226,18 +225,6 @@ void __init cleanup_highmap(void)
 	}
 }
 
-/* NOTE: this is meant to be run only at boot */
-void __init __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
-{
-	unsigned long address = __fix_to_virt(idx);
-
-	if (idx >= __end_of_fixed_addresses) {
-		printk(KERN_ERR "Invalid __set_fixmap\n");
-		return;
-	}
-	set_pte_phys(address, phys, prot);
-}
-
 static unsigned long __initdata table_start;
 static unsigned long __meminitdata table_end;
 
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index ee1d6d39edd..45b99ac3948 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -2,6 +2,7 @@
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 #include <asm/tlb.h>
+#include <asm/fixmap.h>
 
 pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
 {
@@ -274,3 +275,22 @@ int ptep_clear_flush_young(struct vm_area_struct *vma,
 
 	return young;
 }
+
+int fixmaps_set;
+
+void __native_set_fixmap(enum fixed_addresses idx, pte_t pte)
+{
+	unsigned long address = __fix_to_virt(idx);
+
+	if (idx >= __end_of_fixed_addresses) {
+		BUG();
+		return;
+	}
+	set_pte_vaddr(address, pte);
+	fixmaps_set++;
+}
+
+void native_set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
+{
+	__native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags));
+}
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 369cf065b6a..0662f345212 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -71,7 +71,7 @@ void show_mem(void)
  * Associate a virtual page frame with a given physical page frame 
  * and protection flags for that frame.
  */ 
-static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
+void set_pte_vaddr(unsigned long vaddr, pte_t pteval)
 {
 	pgd_t *pgd;
 	pud_t *pud;
@@ -94,8 +94,8 @@ static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
 		return;
 	}
 	pte = pte_offset_kernel(pmd, vaddr);
-	if (pgprot_val(flags))
-		set_pte_present(&init_mm, vaddr, pte, pfn_pte(pfn, flags));
+	if (pte_val(pteval))
+		set_pte_present(&init_mm, vaddr, pte, pteval);
 	else
 		pte_clear(&init_mm, vaddr, pte);
 
@@ -145,18 +145,6 @@ static int fixmaps;
 unsigned long __FIXADDR_TOP = 0xfffff000;
 EXPORT_SYMBOL(__FIXADDR_TOP);
 
-void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
-{
-	unsigned long address = __fix_to_virt(idx);
-
-	if (idx >= __end_of_fixed_addresses) {
-		BUG();
-		return;
-	}
-	set_pte_pfn(address, phys >> PAGE_SHIFT, flags);
-	fixmaps++;
-}
-
 /**
  * reserve_top_address - reserves a hole in the top of kernel address space
  * @reserve - size of hole to reserve
@@ -166,7 +154,7 @@ void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
  */
 void reserve_top_address(unsigned long reserve)
 {
-	BUG_ON(fixmaps > 0);
+	BUG_ON(fixmaps_set > 0);
 	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
 	       (int)-reserve);
 	__FIXADDR_TOP = -reserve - PAGE_SIZE;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index fe60aa9fed0..316623cf411 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1013,6 +1013,33 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
 	return ret;
 }
 
+static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot)
+{
+	pte_t pte;
+
+	phys >>= PAGE_SHIFT;
+
+	switch (idx) {
+	case FIX_BTMAP_END ... FIX_BTMAP_BEGIN:
+#ifdef CONFIG_X86_F00F_BUG
+	case FIX_F00F_IDT:
+#endif
+	case FIX_WP_TEST:
+	case FIX_VDSO:
+#ifdef CONFIG_X86_LOCAL_APIC
+	case FIX_APIC_BASE:	/* maps dummy local APIC */
+#endif
+		pte = pfn_pte(phys, prot);
+		break;
+
+	default:
+		pte = mfn_pte(phys, prot);
+		break;
+	}
+
+	__native_set_fixmap(idx, pte);
+}
+
 static const struct pv_info xen_info __initdata = {
 	.paravirt_enabled = 1,
 	.shared_kernel_pmd = 0,
@@ -1167,6 +1194,8 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
 		.enter = paravirt_enter_lazy_mmu,
 		.leave = xen_leave_lazy,
 	},
+
+	.set_fixmap = xen_set_fixmap,
 };
 
 #ifdef CONFIG_SMP