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/*
* Common IOMMU interface for X86 platform
*
* Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_I386_X86_IOMMU_H
#define HW_I386_X86_IOMMU_H
#include "hw/sysbus.h"
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "qom/object.h"
#define TYPE_X86_IOMMU_DEVICE ("x86-iommu")
OBJECT_DECLARE_TYPE(X86IOMMUState, X86IOMMUClass, X86_IOMMU_DEVICE)
#define X86_IOMMU_SID_INVALID (0xffff)
typedef struct X86IOMMUIrq X86IOMMUIrq;
typedef struct X86IOMMU_MSIMessage X86IOMMU_MSIMessage;
struct X86IOMMUClass {
SysBusDeviceClass parent;
/* Intel/AMD specific realize() hook */
DeviceRealize realize;
/* MSI-based interrupt remapping */
int (*int_remap)(X86IOMMUState *iommu, MSIMessage *src,
MSIMessage *dst, uint16_t sid);
};
/**
* iec_notify_fn - IEC (Interrupt Entry Cache) notifier hook,
* triggered when IR invalidation happens.
* @private: private data
* @global: whether this is a global IEC invalidation
* @index: IRTE index to invalidate (start from)
* @mask: invalidation mask
*/
typedef void (*iec_notify_fn)(void *private, bool global,
uint32_t index, uint32_t mask);
struct IEC_Notifier {
iec_notify_fn iec_notify;
void *private;
QLIST_ENTRY(IEC_Notifier) list;
};
typedef struct IEC_Notifier IEC_Notifier;
struct X86IOMMUState {
SysBusDevice busdev;
OnOffAuto intr_supported; /* Whether vIOMMU supports IR */
bool dt_supported; /* Whether vIOMMU supports DT */
bool pt_supported; /* Whether vIOMMU supports pass-through */
QLIST_HEAD(, IEC_Notifier) iec_notifiers; /* IEC notify list */
};
bool x86_iommu_ir_supported(X86IOMMUState *s);
/* Generic IRQ entry information when interrupt remapping is enabled */
struct X86IOMMUIrq {
/* Used by both IOAPIC/MSI interrupt remapping */
uint8_t trigger_mode;
uint8_t vector;
uint8_t delivery_mode;
uint32_t dest;
uint8_t dest_mode;
/* only used by MSI interrupt remapping */
uint8_t redir_hint;
uint8_t msi_addr_last_bits;
};
struct X86IOMMU_MSIMessage {
union {
struct {
#ifdef HOST_WORDS_BIGENDIAN
uint32_t __addr_head:12; /* 0xfee */
uint32_t dest:8;
uint32_t __reserved:8;
uint32_t redir_hint:1;
uint32_t dest_mode:1;
uint32_t __not_used:2;
#else
uint32_t __not_used:2;
uint32_t dest_mode:1;
uint32_t redir_hint:1;
uint32_t __reserved:8;
uint32_t dest:8;
uint32_t __addr_head:12; /* 0xfee */
#endif
uint32_t __addr_hi;
} QEMU_PACKED;
uint64_t msi_addr;
};
union {
struct {
#ifdef HOST_WORDS_BIGENDIAN
uint16_t trigger_mode:1;
uint16_t level:1;
uint16_t __resved:3;
uint16_t delivery_mode:3;
uint16_t vector:8;
#else
uint16_t vector:8;
uint16_t delivery_mode:3;
uint16_t __resved:3;
uint16_t level:1;
uint16_t trigger_mode:1;
#endif
uint16_t __resved1;
} QEMU_PACKED;
uint32_t msi_data;
};
};
/**
* x86_iommu_get_default - get default IOMMU device
* @return: pointer to default IOMMU device
*/
X86IOMMUState *x86_iommu_get_default(void);
/**
* x86_iommu_iec_register_notifier - register IEC (Interrupt Entry
* Cache) notifiers
* @iommu: IOMMU device to register
* @fn: IEC notifier hook function
* @data: notifier private data
*/
void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
iec_notify_fn fn, void *data);
/**
* x86_iommu_iec_notify_all - Notify IEC invalidations
* @iommu: IOMMU device that sends the notification
* @global: whether this is a global invalidation. If true, @index
* and @mask are undefined.
* @index: starting index of interrupt entry to invalidate
* @mask: index mask for the invalidation
*/
void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
uint32_t index, uint32_t mask);
/**
* x86_iommu_irq_to_msi_message - Populate one MSIMessage from X86IOMMUIrq
* @X86IOMMUIrq: The IRQ information
* @out: Output MSI message
*/
void x86_iommu_irq_to_msi_message(X86IOMMUIrq *irq, MSIMessage *out);
#endif
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