diff --git a/alpine/kernel/kernel_config b/alpine/kernel/kernel_config
index a2f8268ec..18faf407a 100644
--- a/alpine/kernel/kernel_config
+++ b/alpine/kernel/kernel_config
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.9.0 Kernel Configuration
+# Linux/x86 4.9.4 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -512,6 +512,7 @@ CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_BOUNCE=y
 CONFIG_VIRT_TO_BUS=y
+CONFIG_MMU_NOTIFIER=y
 CONFIG_KSM=y
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
 CONFIG_TRANSPARENT_HUGEPAGE=y
@@ -1362,7 +1363,7 @@ CONFIG_ALLOW_DEV_COREDUMP=y
 # CONFIG_DEBUG_DRIVER is not set
 # CONFIG_DEBUG_DEVRES is not set
 # CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
-# CONFIG_SYS_HYPERVISOR is not set
+CONFIG_SYS_HYPERVISOR=y
 # CONFIG_GENERIC_CPU_DEVICES is not set
 CONFIG_GENERIC_CPU_AUTOPROBE=y
 CONFIG_REGMAP=y
@@ -2651,7 +2652,7 @@ CONFIG_VIRTIO=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_PCI_LEGACY=y
 CONFIG_VIRTIO_BALLOON=y
-# CONFIG_VIRTIO_INPUT is not set
+CONFIG_VIRTIO_INPUT=y
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 
@@ -2660,26 +2661,31 @@ CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 #
 CONFIG_HYPERV=y
 CONFIG_HYPERV_UTILS=y
-# CONFIG_HYPERV_BALLOON is not set
+CONFIG_HYPERV_BALLOON=y
 
 #
 # Xen driver support
 #
-# CONFIG_XEN_BALLOON is not set
-# CONFIG_XEN_DEV_EVTCHN is not set
+CONFIG_XEN_BALLOON=y
+CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
+CONFIG_XEN_BALLOON_MEMORY_HOTPLUG_LIMIT=512
+CONFIG_XEN_SCRUB_PAGES=y
+CONFIG_XEN_DEV_EVTCHN=y
 # CONFIG_XEN_BACKEND is not set
-# CONFIG_XENFS is not set
-# CONFIG_XEN_SYS_HYPERVISOR is not set
+CONFIG_XENFS=y
+CONFIG_XEN_COMPAT_XENFS=y
+CONFIG_XEN_SYS_HYPERVISOR=y
 CONFIG_XEN_XENBUS_FRONTEND=y
-# CONFIG_XEN_GNTDEV is not set
-# CONFIG_XEN_GRANT_DEV_ALLOC is not set
+CONFIG_XEN_GNTDEV=y
+CONFIG_XEN_GRANT_DEV_ALLOC=y
 CONFIG_SWIOTLB_XEN=y
-CONFIG_XEN_PRIVCMD=m
-# CONFIG_XEN_ACPI_PROCESSOR is not set
+CONFIG_XEN_PRIVCMD=y
+CONFIG_XEN_ACPI_PROCESSOR=y
 CONFIG_XEN_HAVE_PVMMU=y
 CONFIG_XEN_EFI=y
 CONFIG_XEN_AUTO_XLATE=y
 CONFIG_XEN_ACPI=y
+# CONFIG_XEN_SYMS is not set
 CONFIG_XEN_HAVE_VPMU=y
 # CONFIG_STAGING is not set
 CONFIG_X86_PLATFORM_DEVICES=y