81 строка
2.2 KiB
C
81 строка
2.2 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef __LINUX_ENTRYKVM_H
|
||
|
|
#define __LINUX_ENTRYKVM_H
|
||
|
|
|
||
|
|
#include <linux/entry-common.h>
|
||
|
|
|
||
|
|
/* Transfer to guest mode work */
|
||
|
|
#ifdef CONFIG_KVM_XFER_TO_GUEST_WORK
|
||
|
|
|
||
|
|
#ifndef ARCH_XFER_TO_GUEST_MODE_WORK
|
||
|
|
# define ARCH_XFER_TO_GUEST_MODE_WORK (0)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define XFER_TO_GUEST_MODE_WORK \
|
||
|
|
(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
|
||
|
|
_TIF_NOTIFY_RESUME | ARCH_XFER_TO_GUEST_MODE_WORK)
|
||
|
|
|
||
|
|
struct kvm_vcpu;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* arch_xfer_to_guest_mode_handle_work - Architecture specific xfer to guest
|
||
|
|
* mode work handling function.
|
||
|
|
* @vcpu: Pointer to current's VCPU data
|
||
|
|
* @ti_work: Cached TIF flags gathered in xfer_to_guest_mode_handle_work()
|
||
|
|
*
|
||
|
|
* Invoked from xfer_to_guest_mode_handle_work(). Defaults to NOOP. Can be
|
||
|
|
* replaced by architecture specific code.
|
||
|
|
*/
|
||
|
|
static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu,
|
||
|
|
unsigned long ti_work);
|
||
|
|
|
||
|
|
#ifndef arch_xfer_to_guest_mode_work
|
||
|
|
static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu,
|
||
|
|
unsigned long ti_work)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xfer_to_guest_mode_handle_work - Check and handle pending work which needs
|
||
|
|
* to be handled before going to guest mode
|
||
|
|
* @vcpu: Pointer to current's VCPU data
|
||
|
|
*
|
||
|
|
* Returns: 0 or an error code
|
||
|
|
*/
|
||
|
|
int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* __xfer_to_guest_mode_work_pending - Check if work is pending
|
||
|
|
*
|
||
|
|
* Returns: True if work pending, False otherwise.
|
||
|
|
*
|
||
|
|
* Bare variant of xfer_to_guest_mode_work_pending(). Can be called from
|
||
|
|
* interrupt enabled code for racy quick checks with care.
|
||
|
|
*/
|
||
|
|
static inline bool __xfer_to_guest_mode_work_pending(void)
|
||
|
|
{
|
||
|
|
unsigned long ti_work = READ_ONCE(current_thread_info()->flags);
|
||
|
|
|
||
|
|
return !!(ti_work & XFER_TO_GUEST_MODE_WORK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xfer_to_guest_mode_work_pending - Check if work is pending which needs to be
|
||
|
|
* handled before returning to guest mode
|
||
|
|
*
|
||
|
|
* Returns: True if work pending, False otherwise.
|
||
|
|
*
|
||
|
|
* Has to be invoked with interrupts disabled before the transition to
|
||
|
|
* guest mode.
|
||
|
|
*/
|
||
|
|
static inline bool xfer_to_guest_mode_work_pending(void)
|
||
|
|
{
|
||
|
|
lockdep_assert_irqs_disabled();
|
||
|
|
return __xfer_to_guest_mode_work_pending();
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */
|
||
|
|
|
||
|
|
#endif
|