xen/setup: update VA mapping when releasing memory during setup

[deliverable/linux.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 58a0e46c404dc417c9af3cf9a08856096ebc99cf..c9a351925a0ce62e83ece80730511df20daa674d 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1071,14 +1071,14 @@ static void drop_other_mm_ref(void *info)
        struct mm_struct *mm = info;
        struct mm_struct *active_mm;
 
-       active_mm = percpu_read(cpu_tlbstate.active_mm);
+       active_mm = this_cpu_read(cpu_tlbstate.active_mm);
 
-       if (active_mm == mm && percpu_read(cpu_tlbstate.state) != TLBSTATE_OK)
+       if (active_mm == mm && this_cpu_read(cpu_tlbstate.state) != TLBSTATE_OK)
                leave_mm(smp_processor_id());
 
        /* If this cpu still has a stale cr3 reference, then make sure
           it has been flushed. */
-       if (percpu_read(xen_current_cr3) == __pa(mm->pgd))
+       if (this_cpu_read(xen_current_cr3) == __pa(mm->pgd))
                load_cr3(swapper_pg_dir);
 }
 
@@ -1185,17 +1185,17 @@ static void __init xen_pagetable_setup_done(pgd_t *base)
 
 static void xen_write_cr2(unsigned long cr2)
 {
-       percpu_read(xen_vcpu)->arch.cr2 = cr2;
+       this_cpu_read(xen_vcpu)->arch.cr2 = cr2;
 }
 
 static unsigned long xen_read_cr2(void)
 {
-       return percpu_read(xen_vcpu)->arch.cr2;
+       return this_cpu_read(xen_vcpu)->arch.cr2;
 }
 
 unsigned long xen_read_cr2_direct(void)
 {
-       return percpu_read(xen_vcpu_info.arch.cr2);
+       return this_cpu_read(xen_vcpu_info.arch.cr2);
 }
 
 static void xen_flush_tlb(void)
@@ -1278,12 +1278,12 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
 
 static unsigned long xen_read_cr3(void)
 {
-       return percpu_read(xen_cr3);
+       return this_cpu_read(xen_cr3);
 }
 
 static void set_current_cr3(void *v)
 {
-       percpu_write(xen_current_cr3, (unsigned long)v);
+       this_cpu_write(xen_current_cr3, (unsigned long)v);
 }
 
 static void __xen_write_cr3(bool kernel, unsigned long cr3)
@@ -1306,7 +1306,7 @@ static void __xen_write_cr3(bool kernel, unsigned long cr3)
        xen_extend_mmuext_op(&op);
 
        if (kernel) {
-               percpu_write(xen_cr3, cr3);
+               this_cpu_write(xen_cr3, cr3);
 
                /* Update xen_current_cr3 once the batch has actually
                   been submitted. */
@@ -1322,7 +1322,7 @@ static void xen_write_cr3(unsigned long cr3)
 
        /* Update while interrupts are disabled, so its atomic with
           respect to ipis */
-       percpu_write(xen_cr3, cr3);
+       this_cpu_write(xen_cr3, cr3);
 
        __xen_write_cr3(true, cr3);
 
@@ -1859,6 +1859,7 @@ pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,
 #endif /* CONFIG_X86_64 */
 
 static unsigned char dummy_mapping[PAGE_SIZE] __page_aligned_bss;
+static unsigned char fake_ioapic_mapping[PAGE_SIZE] __page_aligned_bss;
 
 static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
 {
@@ -1899,7 +1900,7 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
                 * We just don't map the IO APIC - all access is via
                 * hypercalls.  Keep the address in the pte for reference.
                 */
-               pte = pfn_pte(PFN_DOWN(__pa(dummy_mapping)), PAGE_KERNEL);
+               pte = pfn_pte(PFN_DOWN(__pa(fake_ioapic_mapping)), PAGE_KERNEL);
                break;
 #endif
 
@@ -1928,29 +1929,6 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
 #endif
 }
 
-void __init xen_ident_map_ISA(void)
-{
-       unsigned long pa;
-
-       /*
-        * If we're dom0, then linear map the ISA machine addresses into
-        * the kernel's address space.
-        */
-       if (!xen_initial_domain())
-               return;
-
-       xen_raw_printk("Xen: setup ISA identity maps\n");
-
-       for (pa = ISA_START_ADDRESS; pa < ISA_END_ADDRESS; pa += PAGE_SIZE) {
-               pte_t pte = mfn_pte(PFN_DOWN(pa), PAGE_KERNEL_IO);
-
-               if (HYPERVISOR_update_va_mapping(PAGE_OFFSET + pa, pte, 0))
-                       BUG();
-       }
-
-       xen_flush_tlb();
-}
-
 static void __init xen_post_allocator_init(void)
 {
        pv_mmu_ops.set_pte = xen_set_pte;
@@ -2064,6 +2042,7 @@ void __init xen_init_mmu_ops(void)
        pv_mmu_ops = xen_mmu_ops;
 
        memset(dummy_mapping, 0xff, PAGE_SIZE);
+       memset(fake_ioapic_mapping, 0xfd, PAGE_SIZE);
 }
 
 /* Protected by xen_reservation_lock. */