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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 | ||
7c5d8fa6 | 11 | if (ti_work & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) { |
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12 | kvm_handle_signal_exit(vcpu); |
13 | return -EINTR; | |
14 | } | |
15 | ||
16 | if (ti_work & _TIF_NEED_RESCHED) | |
17 | schedule(); | |
18 | ||
3c532798 | 19 | if (ti_work & _TIF_NOTIFY_RESUME) |
03248add | 20 | resume_user_mode_work(NULL); |
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21 | |
22 | ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work); | |
23 | if (ret) | |
24 | return ret; | |
25 | ||
6ce89512 | 26 | ti_work = read_thread_flags(); |
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27 | } while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched()); |
28 | return 0; | |
29 | } | |
30 | ||
31 | int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu) | |
32 | { | |
33 | unsigned long ti_work; | |
34 | ||
35 | /* | |
36 | * This is invoked from the outer guest loop with interrupts and | |
37 | * preemption enabled. | |
38 | * | |
39 | * KVM invokes xfer_to_guest_mode_work_pending() with interrupts | |
40 | * disabled in the inner loop before going into guest mode. No need | |
41 | * to disable interrupts here. | |
42 | */ | |
6ce89512 | 43 | ti_work = read_thread_flags(); |
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44 | if (!(ti_work & XFER_TO_GUEST_MODE_WORK)) |
45 | return 0; | |
46 | ||
47 | return xfer_to_guest_mode_work(vcpu, ti_work); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work); |