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52 lines
1.2 KiB
52 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/entry-kvm.h> |
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#include <linux/kvm_host.h> |
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static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work) |
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{ |
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do { |
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int ret; |
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if (ti_work & _TIF_NOTIFY_SIGNAL) |
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tracehook_notify_signal(); |
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if (ti_work & _TIF_SIGPENDING) { |
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kvm_handle_signal_exit(vcpu); |
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return -EINTR; |
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} |
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if (ti_work & _TIF_NEED_RESCHED) |
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schedule(); |
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if (ti_work & _TIF_NOTIFY_RESUME) |
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tracehook_notify_resume(NULL); |
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ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work); |
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if (ret) |
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return ret; |
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ti_work = READ_ONCE(current_thread_info()->flags); |
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} while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched()); |
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return 0; |
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} |
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int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu) |
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{ |
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unsigned long ti_work; |
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/* |
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* This is invoked from the outer guest loop with interrupts and |
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* preemption enabled. |
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* |
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* KVM invokes xfer_to_guest_mode_work_pending() with interrupts |
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* disabled in the inner loop before going into guest mode. No need |
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* to disable interrupts here. |
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*/ |
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ti_work = READ_ONCE(current_thread_info()->flags); |
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if (!(ti_work & XFER_TO_GUEST_MODE_WORK)) |
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return 0; |
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return xfer_to_guest_mode_work(vcpu, ti_work); |
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} |
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EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work);
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