Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel...

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

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 105db2501050483901a3ba9be6b37310b4152481..b1dbdaa23ecc2a632003382c0c9e4e1d6819e386 100644 (file)
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -204,6 +204,9 @@ char * __init xen_memory_setup(void)
         * Even though this is normal, usable memory under Xen, reserve
         * ISA memory anyway because too many things think they can poke
         * about in there.
+        *
+        * In a dom0 kernel, this region is identity mapped with the
+        * hardware ISA area, so it really is out of bounds.
         */
        e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS,
                        E820_RESERVED);
@@ -367,7 +370,5 @@ void __init xen_arch_setup(void)
 
        pm_idle = xen_idle;
 
-       paravirt_disable_iospace();
-
        fiddle_vdso();
 }