02a2cbc872
This patch introduces x86 IOMMU IEC (Interrupt Entry Cache) invalidation notifier list. When vIOMMU receives IEC invalidate request, all the registered units will be notified with specific invalidation requests. Intel IOMMU is the first provider that generates such a event. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
/*
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* Common IOMMU interface for X86 platform
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*
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* Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef IOMMU_COMMON_H
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#define IOMMU_COMMON_H
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#include "hw/sysbus.h"
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#include "hw/pci/pci.h"
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#define TYPE_X86_IOMMU_DEVICE ("x86-iommu")
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#define X86_IOMMU_DEVICE(obj) \
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OBJECT_CHECK(X86IOMMUState, (obj), TYPE_X86_IOMMU_DEVICE)
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#define X86_IOMMU_CLASS(klass) \
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OBJECT_CLASS_CHECK(X86IOMMUClass, (klass), TYPE_X86_IOMMU_DEVICE)
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#define X86_IOMMU_GET_CLASS(obj) \
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OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE)
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#define X86_IOMMU_PCI_DEVFN_MAX 256
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#define X86_IOMMU_SID_INVALID (0xffff)
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typedef struct X86IOMMUState X86IOMMUState;
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typedef struct X86IOMMUClass X86IOMMUClass;
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struct X86IOMMUClass {
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SysBusDeviceClass parent;
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/* Intel/AMD specific realize() hook */
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DeviceRealize realize;
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/* MSI-based interrupt remapping */
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int (*int_remap)(X86IOMMUState *iommu, MSIMessage *src,
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MSIMessage *dst, uint16_t sid);
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};
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/**
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* iec_notify_fn - IEC (Interrupt Entry Cache) notifier hook,
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* triggered when IR invalidation happens.
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* @private: private data
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* @global: whether this is a global IEC invalidation
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* @index: IRTE index to invalidate (start from)
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* @mask: invalidation mask
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*/
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typedef void (*iec_notify_fn)(void *private, bool global,
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uint32_t index, uint32_t mask);
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struct IEC_Notifier {
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iec_notify_fn iec_notify;
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void *private;
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QLIST_ENTRY(IEC_Notifier) list;
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};
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typedef struct IEC_Notifier IEC_Notifier;
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struct X86IOMMUState {
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SysBusDevice busdev;
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bool intr_supported; /* Whether vIOMMU supports IR */
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QLIST_HEAD(, IEC_Notifier) iec_notifiers; /* IEC notify list */
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};
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/**
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* x86_iommu_get_default - get default IOMMU device
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* @return: pointer to default IOMMU device
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*/
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X86IOMMUState *x86_iommu_get_default(void);
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/**
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* x86_iommu_iec_register_notifier - register IEC (Interrupt Entry
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* Cache) notifiers
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* @iommu: IOMMU device to register
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* @fn: IEC notifier hook function
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* @data: notifier private data
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*/
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void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
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iec_notify_fn fn, void *data);
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/**
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* x86_iommu_iec_notify_all - Notify IEC invalidations
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* @iommu: IOMMU device that sends the notification
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* @global: whether this is a global invalidation. If true, @index
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* and @mask are undefined.
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* @index: starting index of interrupt entry to invalidate
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* @mask: index mask for the invalidation
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*/
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void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
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uint32_t index, uint32_t mask);
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#endif
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