1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/entry-virt.h> 4 xfer_to_guest_mode_work(unsigned long ti_work)5static int xfer_to_guest_mode_work(unsigned long ti_work) 6 { 7 do { 8 int ret; 9 10 if (ti_work & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) 11 return -EINTR; 12 13 if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)) 14 schedule(); 15 16 if (ti_work & _TIF_NOTIFY_RESUME) 17 resume_user_mode_work(NULL); 18 19 ret = arch_xfer_to_guest_mode_handle_work(ti_work); 20 if (ret) 21 return ret; 22 23 ti_work = read_thread_flags(); 24 } while (ti_work & XFER_TO_GUEST_MODE_WORK); 25 return 0; 26 } 27 xfer_to_guest_mode_handle_work(void)28int xfer_to_guest_mode_handle_work(void) 29 { 30 unsigned long ti_work; 31 32 /* 33 * This is invoked from the outer guest loop with interrupts and 34 * preemption enabled. 35 * 36 * KVM invokes xfer_to_guest_mode_work_pending() with interrupts 37 * disabled in the inner loop before going into guest mode. No need 38 * to disable interrupts here. 39 */ 40 ti_work = read_thread_flags(); 41 if (!(ti_work & XFER_TO_GUEST_MODE_WORK)) 42 return 0; 43 44 return xfer_to_guest_mode_work(ti_work); 45 } 46 EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work); 47