[mirror_ubuntu-hirsute-kernel.git] / kernel / entry / kvm.c

// SPDX-License-Identifier: GPL-2.0

#include <linux/entry-kvm.h>
#include <linux/kvm_host.h>

static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work)
{
	do {
		int ret;

		if (ti_work & _TIF_NOTIFY_SIGNAL)
			tracehook_notify_signal();

		if (ti_work & _TIF_SIGPENDING) {
			kvm_handle_signal_exit(vcpu);
			return -EINTR;
		}

		if (ti_work & _TIF_NEED_RESCHED)
			schedule();

		if (ti_work & _TIF_NOTIFY_RESUME)
			tracehook_notify_resume(NULL);

		ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work);
		if (ret)
			return ret;

		ti_work = READ_ONCE(current_thread_info()->flags);
	} while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched());
	return 0;
}

int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu)
{
	unsigned long ti_work;

	/*
	 * This is invoked from the outer guest loop with interrupts and
	 * preemption enabled.
	 *
	 * KVM invokes xfer_to_guest_mode_work_pending() with interrupts
	 * disabled in the inner loop before going into guest mode. No need
	 * to disable interrupts here.
	 */
	ti_work = READ_ONCE(current_thread_info()->flags);
	if (!(ti_work & XFER_TO_GUEST_MODE_WORK))
		return 0;

	return xfer_to_guest_mode_work(vcpu, ti_work);
}
EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work);
Commit	Line	Data
935ace2f TG	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	#include <linux/entry-kvm.h>
	4	#include <linux/kvm_host.h>
	5
	6	static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work)
	7	{
	8	do {
	9	int ret;
	10
12db8b69 JA	11	if (ti_work & _TIF_NOTIFY_SIGNAL)
	12	tracehook_notify_signal();
	13
935ace2f TG	14	if (ti_work & _TIF_SIGPENDING) {
	15	kvm_handle_signal_exit(vcpu);
	16	return -EINTR;
	17	}
	18
	19	if (ti_work & _TIF_NEED_RESCHED)
	20	schedule();
	21
3c532798	22	if (ti_work & _TIF_NOTIFY_RESUME)
935ace2f	23	tracehook_notify_resume(NULL);
935ace2f TG	24
	25	ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work);
	26	if (ret)
	27	return ret;
	28
	29	ti_work = READ_ONCE(current_thread_info()->flags);
	30	} while (ti_work & XFER_TO_GUEST_MODE_WORK \|\| need_resched());
	31	return 0;
	32	}
	33
	34	int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu)
	35	{
	36	unsigned long ti_work;
	37
	38	/*
	39	* This is invoked from the outer guest loop with interrupts and
	40	* preemption enabled.
	41	*
	42	* KVM invokes xfer_to_guest_mode_work_pending() with interrupts
	43	* disabled in the inner loop before going into guest mode. No need
	44	* to disable interrupts here.
	45	*/
	46	ti_work = READ_ONCE(current_thread_info()->flags);
	47	if (!(ti_work & XFER_TO_GUEST_MODE_WORK))
	48	return 0;
	49
	50	return xfer_to_guest_mode_work(vcpu, ti_work);
	51	}
	52	EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work);