x86/generic: add xen DomU support

Copy the relevant config options from the xen_domu subtarget

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/x86/base-files/etc/inittab

 ::sysinit:/etc/init.d/rcS S boot
 ::shutdown:/etc/init.d/rcS K shutdown
 ttyS0::askfirst:/usr/libexec/login.sh
+hvc0::askfirst:/usr/libexec/login.sh
 tty1::askfirst:/usr/libexec/login.sh

target/linux/x86/generic/base-files/lib/preinit/45_mount_xenfs

+#!/bin/sh
+# Copyright (C) 2010 OpenWrt.org
+
+do_mount_xenfs() {
+	grep -q xenfs /proc/filesystems && \
+		mount -o noatime -t xenfs none /proc/xen
+}
+
+boot_hook_add preinit_mount_root do_mount_xenfs

target/linux/x86/generic/config-default

@@ -5,7 +5,7 @@ CONFIG_ACPI_BATTERY=y
 # CONFIG_ACPI_BGRT is not set
 CONFIG_ACPI_BUTTON=y
 # CONFIG_ACPI_CMPC is not set
-# CONFIG_ACPI_CONTAINER is not set
+CONFIG_ACPI_CONTAINER=y
 CONFIG_ACPI_CPU_FREQ_PSS=y
 # CONFIG_ACPI_CUSTOM_DSDT is not set
 # CONFIG_ACPI_DEBUG is not set
@@ -13,6 +13,7 @@ CONFIG_ACPI_CPU_FREQ_PSS=y
 # CONFIG_ACPI_DOCK is not set
 # CONFIG_ACPI_EC_DEBUGFS is not set
 # CONFIG_ACPI_FAN is not set
+CONFIG_ACPI_HOTPLUG_CPU=y
 CONFIG_ACPI_HOTPLUG_IOAPIC=y
 # CONFIG_ACPI_I2C_OPREGION is not set
 # CONFIG_ACPI_INITRD_TABLE_OVERRIDE is not set
@@ -40,6 +41,7 @@ CONFIG_AGP_INTEL=y
 # CONFIG_AGP_SIS is not set
 # CONFIG_AGP_SWORKS is not set
 # CONFIG_AGP_VIA is not set
+# CONFIG_APM is not set
 CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
 CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y
 CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
@@ -51,10 +53,17 @@ CONFIG_BACKLIGHT_GENERIC=y
 CONFIG_BACKLIGHT_LCD_SUPPORT=y
 CONFIG_BLK_DEV_SR=y
 # CONFIG_BLK_DEV_SR_VENDOR is not set
+# CONFIG_BOOTPARAM_HOTPLUG_CPU0 is not set
 CONFIG_CLKDEV_LOOKUP=y
 CONFIG_COMMON_CLK=y
 CONFIG_CPU_IDLE_GOV_MENU=y
 CONFIG_CPU_RMAP=y
+CONFIG_CRYPTO_AEAD=y
+CONFIG_CRYPTO_AEAD2=y
+CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MANAGER2=y
+CONFIG_CRYPTO_NULL2=y
+# CONFIG_DEBUG_HOTPLUG_CPU0 is not set
 CONFIG_DMA_SHARED_BUFFER=y
 CONFIG_DRM=y
 CONFIG_DRM_AMDGPU=y
@@ -112,6 +121,7 @@ CONFIG_FB_CFB_COPYAREA=y
 CONFIG_FB_CFB_FILLRECT=y
 CONFIG_FB_CFB_IMAGEBLIT=y
 CONFIG_FB_CMDLINE=y
+CONFIG_FB_DEFERRED_IO=y
 CONFIG_FB_EFI=y
 # CONFIG_FB_I810 is not set
 CONFIG_FB_SYS_COPYAREA=y
@@ -126,6 +136,7 @@ CONFIG_FONT_SUPPORT=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
 CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
 # CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
+CONFIG_FREEZER=y
 CONFIG_GENERIC_PENDING_IRQ=y
 CONFIG_GENERIC_PINCONF=y
 CONFIG_GPIOLIB=y
@@ -151,13 +162,18 @@ CONFIG_HAVE_KVM_IRQ_BYPASS=y
 CONFIG_HAVE_KVM_IRQ_ROUTING=y
 CONFIG_HAVE_KVM_MSI=y
 CONFIG_HDMI=y
+CONFIG_HIBERNATE_CALLBACKS=y
 CONFIG_HID=y
 CONFIG_HID_BATTERY_STRENGTH=y
 # CONFIG_HIGHMEM64G is not set
+CONFIG_HOTPLUG_CPU=y
 CONFIG_HPET=y
 CONFIG_HPET_MMAP=y
 # CONFIG_HP_ACCEL is not set
 CONFIG_HVC_DRIVER=y
+CONFIG_HVC_IRQ=y
+CONFIG_HVC_XEN=y
+CONFIG_HVC_XEN_FRONTEND=y
 CONFIG_HWMON=y
 CONFIG_HW_RANDOM_VIRTIO=y
 CONFIG_HYPERVISOR_GUEST=y
@@ -169,6 +185,7 @@ CONFIG_INPUT_MOUSEDEV=y
 CONFIG_INPUT_MOUSEDEV_PSAUX=y
 CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
+CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
 CONFIG_INTEL_GTT=y
 CONFIG_INTEL_IDLE=y
 # CONFIG_INTEL_IPS is not set
@@ -194,7 +211,6 @@ CONFIG_KVM_MMIO=y
 CONFIG_KVM_VFIO=y
 # CONFIG_LANCE is not set
 # CONFIG_LCD_CLASS_DEVICE is not set
-# CONFIG_LGUEST is not set
 # CONFIG_LGUEST_GUEST is not set
 CONFIG_LOCK_SPIN_ON_OWNER=y
 # CONFIG_M486 is not set
@@ -234,6 +250,7 @@ CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NET_FLOW_LIMIT=y
 CONFIG_NO_HZ=y
 CONFIG_NR_CPUS=4
+CONFIG_PADATA=y
 CONFIG_PARAVIRT=y
 CONFIG_PARAVIRT_CLOCK=y
 # CONFIG_PARAVIRT_DEBUG is not set
@@ -249,7 +266,9 @@ CONFIG_PATA_SC1200=y
 CONFIG_PATA_VIA=y
 CONFIG_PCIEAER=y
 CONFIG_PCIEPORTBUS=y
+CONFIG_PCIE_PME=y
 CONFIG_PCI_MMCONFIG=y
+CONFIG_PCI_XEN=y
 # CONFIG_PCWATCHDOG is not set
 CONFIG_PGTABLE_LEVELS=3
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -259,7 +278,12 @@ CONFIG_PINCTRL_BROXTON=y
 CONFIG_PINCTRL_CHERRYVIEW=y
 CONFIG_PINCTRL_INTEL=y
 CONFIG_PINCTRL_SUNRISEPOINT=y
+CONFIG_PM=y
 # CONFIG_PMIC_OPREGION is not set
+CONFIG_PM_CLK=y
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_PM_SLEEP_SMP=y
 CONFIG_PNP=y
 CONFIG_PNPACPI=y
 # CONFIG_PNPBIOS is not set
@@ -284,9 +308,10 @@ CONFIG_SERIAL_8250_PNP=y
 CONFIG_SMP=y
 # CONFIG_SURFACE_PRO3_BUTTON is not set
 CONFIG_SWIOTLB=y
+CONFIG_SWIOTLB_XEN=y
+CONFIG_SYS_HYPERVISOR=y
 CONFIG_TASKSTATS=y
 CONFIG_TASK_DELAY_ACCT=y
-# CONFIG_TASK_XACCT is not set
 # CONFIG_TOSHIBA_BT_RFKILL is not set
 CONFIG_TREE_RCU=y
 CONFIG_UCS2_STRING=y
@@ -303,7 +328,6 @@ CONFIG_USER_RETURN_NOTIFIER=y
 CONFIG_VGACON_SOFT_SCROLLBACK=y
 CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
 CONFIG_VHOST=y
-# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
 CONFIG_VHOST_NET=y
 CONFIG_VHOST_RING=y
 CONFIG_VIRTIO=y
@@ -317,6 +341,7 @@ CONFIG_VIRTIO_NET=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_PCI_LEGACY=y
 CONFIG_VIRTUALIZATION=y
+CONFIG_VT_CONSOLE_SLEEP=y
 # CONFIG_WDT is not set
 CONFIG_X86_32_SMP=y
 CONFIG_X86_ACPI_CPUFREQ=y
@@ -342,4 +367,32 @@ CONFIG_X86_PM_TIMER=y
 # CONFIG_X86_POWERNOW_K8 is not set
 CONFIG_X86_TSC=y
 CONFIG_X86_USE_PPRO_CHECKSUM=y
+CONFIG_XEN=y
+CONFIG_XENFS=y
+CONFIG_XEN_ACPI=y
+CONFIG_XEN_ACPI_PROCESSOR=y
+CONFIG_XEN_AUTO_XLATE=y
+# CONFIG_XEN_BACKEND is not set
+CONFIG_XEN_BALLOON=y
+CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_COMPAT_XENFS=y
+CONFIG_XEN_DEBUG_FS=y
+CONFIG_XEN_DEV_EVTCHN=y
+CONFIG_XEN_DOM0=y
+CONFIG_XEN_FBDEV_FRONTEND=y
+CONFIG_XEN_GNTDEV=y
+CONFIG_XEN_GRANT_DEV_ALLOC=y
+CONFIG_XEN_HAVE_PVMMU=y
+CONFIG_XEN_HAVE_VPMU=y
+CONFIG_XEN_NETDEV_FRONTEND=y
+CONFIG_XEN_PCIDEV_FRONTEND=y
+CONFIG_XEN_PRIVCMD=y
+CONFIG_XEN_PVHVM=y
+CONFIG_XEN_SAVE_RESTORE=y
+CONFIG_XEN_SCRUB_PAGES=y
+CONFIG_XEN_SCSI_FRONTEND=y
+CONFIG_XEN_SYMS=y
+CONFIG_XEN_SYS_HYPERVISOR=y
+CONFIG_XEN_WDT=y
+CONFIG_XEN_XENBUS_FRONTEND=y
 CONFIG_XPS=y