Merge branch 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[~andy/linux] / arch / x86 / xen / setup.c

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 518ab4a17b8a87d9c4caaa34c16c30ae7823ff49..0982233b9b8433a97d6905de4aad3369c6f4c0a5 100644 (file)
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -27,6 +27,7 @@
 #include <xen/interface/memory.h>
 #include <xen/interface/physdev.h>
 #include <xen/features.h>
+#include "mmu.h"
 #include "xen-ops.h"
 #include "vdso.h"
 
@@ -81,6 +82,9 @@ static void __init xen_add_extra_mem(u64 start, u64 size)
 
        memblock_reserve(start, size);
 
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return;
+
        xen_max_p2m_pfn = PFN_DOWN(start + size);
        for (pfn = PFN_DOWN(start); pfn < xen_max_p2m_pfn; pfn++) {
                unsigned long mfn = pfn_to_mfn(pfn);
@@ -103,6 +107,7 @@ static unsigned long __init xen_do_chunk(unsigned long start,
                .domid        = DOMID_SELF
        };
        unsigned long len = 0;
+       int xlated_phys = xen_feature(XENFEAT_auto_translated_physmap);
        unsigned long pfn;
        int ret;
 
@@ -116,7 +121,7 @@ static unsigned long __init xen_do_chunk(unsigned long start,
                                continue;
                        frame = mfn;
                } else {
-                       if (mfn != INVALID_P2M_ENTRY)
+                       if (!xlated_phys && mfn != INVALID_P2M_ENTRY)
                                continue;
                        frame = pfn;
                }
@@ -154,6 +159,13 @@ static unsigned long __init xen_do_chunk(unsigned long start,
 static unsigned long __init xen_release_chunk(unsigned long start,
                                              unsigned long end)
 {
+       /*
+        * Xen already ballooned out the E820 non RAM regions for us
+        * and set them up properly in EPT.
+        */
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return end - start;
+
        return xen_do_chunk(start, end, true);
 }
 
@@ -222,7 +234,13 @@ static void __init xen_set_identity_and_release_chunk(
         * (except for the ISA region which must be 1:1 mapped) to
         * release the refcounts (in Xen) on the original frames.
         */
-       for (pfn = start_pfn; pfn <= max_pfn_mapped && pfn < end_pfn; pfn++) {
+
+       /*
+        * PVH E820 matches the hypervisor's P2M which means we need to
+        * account for the proper values of *release and *identity.
+        */
+       for (pfn = start_pfn; !xen_feature(XENFEAT_auto_translated_physmap) &&
+            pfn <= max_pfn_mapped && pfn < end_pfn; pfn++) {
                pte_t pte = __pte_ma(0);
 
                if (pfn < PFN_UP(ISA_END_ADDRESS))
@@ -563,16 +581,13 @@ void xen_enable_nmi(void)
                BUG();
 #endif
 }
-void __init xen_arch_setup(void)
+void __init xen_pvmmu_arch_setup(void)
 {
-       xen_panic_handler_init();
-
        HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
        HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
 
-       if (!xen_feature(XENFEAT_auto_translated_physmap))
-               HYPERVISOR_vm_assist(VMASST_CMD_enable,
-                                    VMASST_TYPE_pae_extended_cr3);
+       HYPERVISOR_vm_assist(VMASST_CMD_enable,
+                            VMASST_TYPE_pae_extended_cr3);
 
        if (register_callback(CALLBACKTYPE_event, xen_hypervisor_callback) ||
            register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback))
@@ -581,6 +596,15 @@ void __init xen_arch_setup(void)
        xen_enable_sysenter();
        xen_enable_syscall();
        xen_enable_nmi();
+}
+
+/* This function is not called for HVM domains */
+void __init xen_arch_setup(void)
+{
+       xen_panic_handler_init();
+       if (!xen_feature(XENFEAT_auto_translated_physmap))
+               xen_pvmmu_arch_setup();
+
 #ifdef CONFIG_ACPI
        if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
                printk(KERN_INFO "ACPI in unprivileged domain disabled\n");