1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __LINUX_ENTRYKVM_H 3*4882a593Smuzhiyun #define __LINUX_ENTRYKVM_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/entry-common.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* Transfer to guest mode work */ 8*4882a593Smuzhiyun #ifdef CONFIG_KVM_XFER_TO_GUEST_WORK 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef ARCH_XFER_TO_GUEST_MODE_WORK 11*4882a593Smuzhiyun # define ARCH_XFER_TO_GUEST_MODE_WORK (0) 12*4882a593Smuzhiyun #endif 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define XFER_TO_GUEST_MODE_WORK \ 15*4882a593Smuzhiyun (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL | \ 16*4882a593Smuzhiyun _TIF_NOTIFY_RESUME | ARCH_XFER_TO_GUEST_MODE_WORK) 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun struct kvm_vcpu; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /** 21*4882a593Smuzhiyun * arch_xfer_to_guest_mode_handle_work - Architecture specific xfer to guest 22*4882a593Smuzhiyun * mode work handling function. 23*4882a593Smuzhiyun * @vcpu: Pointer to current's VCPU data 24*4882a593Smuzhiyun * @ti_work: Cached TIF flags gathered in xfer_to_guest_mode_handle_work() 25*4882a593Smuzhiyun * 26*4882a593Smuzhiyun * Invoked from xfer_to_guest_mode_handle_work(). Defaults to NOOP. Can be 27*4882a593Smuzhiyun * replaced by architecture specific code. 28*4882a593Smuzhiyun */ 29*4882a593Smuzhiyun static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, 30*4882a593Smuzhiyun unsigned long ti_work); 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #ifndef arch_xfer_to_guest_mode_work arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu * vcpu,unsigned long ti_work)33*4882a593Smuzhiyunstatic inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, 34*4882a593Smuzhiyun unsigned long ti_work) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun return 0; 37*4882a593Smuzhiyun } 38*4882a593Smuzhiyun #endif 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /** 41*4882a593Smuzhiyun * xfer_to_guest_mode_handle_work - Check and handle pending work which needs 42*4882a593Smuzhiyun * to be handled before going to guest mode 43*4882a593Smuzhiyun * @vcpu: Pointer to current's VCPU data 44*4882a593Smuzhiyun * 45*4882a593Smuzhiyun * Returns: 0 or an error code 46*4882a593Smuzhiyun */ 47*4882a593Smuzhiyun int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu); 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun /** 50*4882a593Smuzhiyun * __xfer_to_guest_mode_work_pending - Check if work is pending 51*4882a593Smuzhiyun * 52*4882a593Smuzhiyun * Returns: True if work pending, False otherwise. 53*4882a593Smuzhiyun * 54*4882a593Smuzhiyun * Bare variant of xfer_to_guest_mode_work_pending(). Can be called from 55*4882a593Smuzhiyun * interrupt enabled code for racy quick checks with care. 56*4882a593Smuzhiyun */ __xfer_to_guest_mode_work_pending(void)57*4882a593Smuzhiyunstatic inline bool __xfer_to_guest_mode_work_pending(void) 58*4882a593Smuzhiyun { 59*4882a593Smuzhiyun unsigned long ti_work = READ_ONCE(current_thread_info()->flags); 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun return !!(ti_work & XFER_TO_GUEST_MODE_WORK); 62*4882a593Smuzhiyun } 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun /** 65*4882a593Smuzhiyun * xfer_to_guest_mode_work_pending - Check if work is pending which needs to be 66*4882a593Smuzhiyun * handled before returning to guest mode 67*4882a593Smuzhiyun * 68*4882a593Smuzhiyun * Returns: True if work pending, False otherwise. 69*4882a593Smuzhiyun * 70*4882a593Smuzhiyun * Has to be invoked with interrupts disabled before the transition to 71*4882a593Smuzhiyun * guest mode. 72*4882a593Smuzhiyun */ xfer_to_guest_mode_work_pending(void)73*4882a593Smuzhiyunstatic inline bool xfer_to_guest_mode_work_pending(void) 74*4882a593Smuzhiyun { 75*4882a593Smuzhiyun lockdep_assert_irqs_disabled(); 76*4882a593Smuzhiyun return __xfer_to_guest_mode_work_pending(); 77*4882a593Smuzhiyun } 78*4882a593Smuzhiyun #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */ 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun #endif 81