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 91dc2871e3367ffb0b46a55281f9c68853aa99a5..b756d8cf4df50025fa1707036f3c30e79c46977a 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -415,13 +415,13 @@ static pteval_t iomap_pte(pteval_t val)
 static pteval_t xen_pte_val(pte_t pte)
 {
        pteval_t pteval = pte.pte;
-
+#if 0
        /* If this is a WC pte, convert back from Xen WC to Linux WC */
        if ((pteval & (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)) == _PAGE_PAT) {
                WARN_ON(!pat_enabled);
                pteval = (pteval & ~_PAGE_PAT) | _PAGE_PWT;
        }
-
+#endif
        if (xen_initial_domain() && (pteval & _PAGE_IOMAP))
                return pteval;
 
@@ -463,7 +463,7 @@ void xen_set_pat(u64 pat)
 static pte_t xen_make_pte(pteval_t pte)
 {
        phys_addr_t addr = (pte & PTE_PFN_MASK);
-
+#if 0
        /* If Linux is trying to set a WC pte, then map to the Xen WC.
         * If _PAGE_PAT is set, then it probably means it is really
         * _PAGE_PSE, so avoid fiddling with the PAT mapping and hope
@@ -476,7 +476,7 @@ static pte_t xen_make_pte(pteval_t pte)
                if ((pte & (_PAGE_PCD | _PAGE_PWT)) == _PAGE_PWT)
                        pte = (pte & ~(_PAGE_PCD | _PAGE_PWT)) | _PAGE_PAT;
        }
-
+#endif
        /*
         * Unprivileged domains are allowed to do IOMAPpings for
         * PCI passthrough, but not map ISA space.  The ISA
@@ -1929,29 +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;