Merge branch 'stable/autoballoon.v5.2' into stable/for-linus-3.5

[firefly-linux-kernel-4.4.55.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 988828b479ed29660363f87adda4c6c62707441b..b756d8cf4df50025fa1707036f3c30e79c46977a 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -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. */