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| 2 |
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| 3 | #include <linux/entry-virt.h>
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| 4 |
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| 5 | static int xfer_to_guest_mode_work(unsigned long ti_work)
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| 6 | {
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| 7 | do {
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| 8 | int ret;
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| 9 |
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| 10 | if (ti_work & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
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| 11 | return -EINTR;
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| 12 |
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| 13 | if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY))
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| 14 | schedule();
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| 15 |
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| 16 | if (ti_work & _TIF_NOTIFY_RESUME)
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| 17 | resume_user_mode_work(NULL);
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| 18 |
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| 19 | ret = arch_xfer_to_guest_mode_handle_work(ti_work);
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| 20 | if (ret)
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| 21 | return ret;
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| 22 |
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| 23 | ti_work = read_thread_flags();
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| 24 | } while (ti_work & XFER_TO_GUEST_MODE_WORK);
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| 25 | return 0;
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| 26 | }
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| 27 |
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| 28 | int xfer_to_guest_mode_handle_work(void)
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| 29 | {
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| 30 | unsigned long ti_work;
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| 31 |
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| 32 | |
| 33 | * This is invoked from the outer guest loop with interrupts and
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| 34 | * preemption enabled.
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| 35 | *
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| 36 | * KVM invokes xfer_to_guest_mode_work_pending() with interrupts
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| 37 | * disabled in the inner loop before going into guest mode. No need
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| 38 | * to disable interrupts here.
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| 39 |
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| 40 | ti_work = read_thread_flags();
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| 41 | if (!(ti_work & XFER_TO_GUEST_MODE_WORK))
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| 42 | return 0;
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| 43 |
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| 44 | return xfer_to_guest_mode_work(ti_work);
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| 45 | }
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| 46 | EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work);
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