27c36a12f1
The main differences with the currently implemented method are: - Requires a local APIC EOI, since it doesn't bypass the local APIC as the previous method used to do. - Can be set to use different IDT vectors on each vCPU. Note that FreeBSD doesn't make use of this feature since the event channel IDT vector is reserved system wide. Note that the old method of setting the event channel upcall is not removed, and will be used as a fallback if this newly introduced method is not available. MFC after: 1 month Sponsored by: Citrix Systems R&D
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* $FreeBSD$
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*/
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#ifndef __XEN_HVM_H__
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#define __XEN_HVM_H__
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#include <xen/xen-os.h>
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#include <xen/hypervisor.h>
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#include <xen/interface/hvm/params.h>
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/**
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* \brief Wrapper function to obtain a HVM parameter value.
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*
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* \param index HVM parameter index; see <xen/interface/hvm/params.h>.
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*
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* \returns 0 on failure; the value of the parameter otherwise.
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*/
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static inline unsigned long
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hvm_get_parameter(int index)
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{
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struct xen_hvm_param xhv;
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int error;
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xhv.domid = DOMID_SELF;
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xhv.index = index;
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error = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
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if (error) {
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printf("%s: error %d trying to get %d\n", __func__,
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error, index);
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return (0);
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}
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return (xhv.value);
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}
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/** The callback method types for Hypervisor event delivery to our domain. */
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enum {
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HVM_CB_TYPE_GSI,
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HVM_CB_TYPE_PCI_INTX,
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HVM_CB_TYPE_VECTOR,
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HVM_CB_TYPE_MASK = 0xFF,
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HVM_CB_TYPE_SHIFT = 56
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};
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/** Format for specifying a GSI type callback. */
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enum {
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HVM_CB_GSI_GSI_MASK = 0xFFFFFFFF,
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HVM_CB_GSI_GSI_SHIFT = 0
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};
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#define HVM_CALLBACK_GSI(gsi) \
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(((uint64_t)HVM_CB_TYPE_GSI << HVM_CB_TYPE_SHIFT) \
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| ((gsi) & HVM_CB_GSI_GSI_MASK) << HVM_CB_GSI_GSI_SHIFT)
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/** Format for specifying a virtual PCI interrupt line GSI style callback. */
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enum {
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HVM_CB_PCI_INTX_INTPIN_MASK = 0x3,
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HVM_CB_PCI_INTX_INTPIN_SHIFT = 0,
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HVM_CB_PCI_INTX_SLOT_MASK = 0x1F,
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HVM_CB_PCI_INTX_SLOT_SHIFT = 11,
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};
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#define HVM_CALLBACK_PCI_INTX(slot, pin) \
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(((uint64_t)HVM_CB_TYPE_PCI_INTX << HVM_CB_TYPE_SHIFT) \
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| (((slot) & HVM_CB_PCI_INTX_SLOT_MASK) << HVM_CB_PCI_INTX_SLOT_SHIFT) \
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| (((pin) & HVM_CB_PCI_INTX_INTPIN_MASK) << HVM_CB_PCI_INTX_INTPIN_SHIFT))
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/** Format for specifying a direct IDT vector injection style callback. */
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enum {
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HVM_CB_VECTOR_VECTOR_MASK = 0xFFFFFFFF,
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HVM_CB_VECTOR_VECTOR_SHIFT = 0
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};
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#define HVM_CALLBACK_VECTOR(vector) \
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(((uint64_t)HVM_CB_TYPE_VECTOR << HVM_CB_TYPE_SHIFT) \
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| (((vector) & HVM_CB_GSI_GSI_MASK) << HVM_CB_GSI_GSI_SHIFT))
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enum xen_hvm_init_type {
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XEN_HVM_INIT_EARLY,
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XEN_HVM_INIT_LATE,
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XEN_HVM_INIT_CANCELLED_SUSPEND,
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XEN_HVM_INIT_RESUME,
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};
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int xen_hvm_init_hypercall_stubs(enum xen_hvm_init_type);
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void xen_hvm_set_callback(device_t);
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void xen_hvm_suspend(void);
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void xen_hvm_resume(bool suspend_cancelled);
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extern uint32_t hvm_start_flags;
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extern bool xen_evtchn_needs_ack;
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#endif /* __XEN_HVM_H__ */
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