Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/entry-kvm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/kvm_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		if (ti_work & _TIF_SIGPENDING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 			kvm_handle_signal_exit(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 			return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 		if (ti_work & _TIF_NEED_RESCHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 			schedule();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		if (ti_work & _TIF_NOTIFY_RESUME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 			tracehook_notify_resume(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			rseq_handle_notify_resume(NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		ti_work = READ_ONCE(current_thread_info()->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	} while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	unsigned long ti_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	 * This is invoked from the outer guest loop with interrupts and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	 * preemption enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	 * KVM invokes xfer_to_guest_mode_work_pending() with interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	 * disabled in the inner loop before going into guest mode. No need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	 * to disable interrupts here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	ti_work = READ_ONCE(current_thread_info()->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	if (!(ti_work & XFER_TO_GUEST_MODE_WORK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	return xfer_to_guest_mode_work(vcpu, ti_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work);