ffe1b10d95
Rather than enabling the I/O MMU when the vmm module is loaded, defer initialization until the first attempt to pass a PCI device through to a guest. If the I/O MMU fails to initialize or is not present, than fail the attempt to pass a PCI device through to a guest. The hw.vmm.force_iommu tunable has been removed since the I/O MMU is no longer enabled during boot. However, the I/O MMU support can be disabled by setting the hw.vmm.iommu.enable tunable to 0 to prevent use of the I/O MMU on any systems where it is buggy. Reviewed by: grehan MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D7448
75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
/*-
|
|
* Copyright (c) 2011 NetApp, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _IO_IOMMU_H_
|
|
#define _IO_IOMMU_H_
|
|
|
|
typedef int (*iommu_init_func_t)(void);
|
|
typedef void (*iommu_cleanup_func_t)(void);
|
|
typedef void (*iommu_enable_func_t)(void);
|
|
typedef void (*iommu_disable_func_t)(void);
|
|
typedef void *(*iommu_create_domain_t)(vm_paddr_t maxaddr);
|
|
typedef void (*iommu_destroy_domain_t)(void *domain);
|
|
typedef uint64_t (*iommu_create_mapping_t)(void *domain, vm_paddr_t gpa,
|
|
vm_paddr_t hpa, uint64_t len);
|
|
typedef uint64_t (*iommu_remove_mapping_t)(void *domain, vm_paddr_t gpa,
|
|
uint64_t len);
|
|
typedef void (*iommu_add_device_t)(void *domain, uint16_t rid);
|
|
typedef void (*iommu_remove_device_t)(void *dom, uint16_t rid);
|
|
typedef void (*iommu_invalidate_tlb_t)(void *dom);
|
|
|
|
struct iommu_ops {
|
|
iommu_init_func_t init; /* module wide */
|
|
iommu_cleanup_func_t cleanup;
|
|
iommu_enable_func_t enable;
|
|
iommu_disable_func_t disable;
|
|
|
|
iommu_create_domain_t create_domain; /* domain-specific */
|
|
iommu_destroy_domain_t destroy_domain;
|
|
iommu_create_mapping_t create_mapping;
|
|
iommu_remove_mapping_t remove_mapping;
|
|
iommu_add_device_t add_device;
|
|
iommu_remove_device_t remove_device;
|
|
iommu_invalidate_tlb_t invalidate_tlb;
|
|
};
|
|
|
|
extern struct iommu_ops iommu_ops_intel;
|
|
extern struct iommu_ops iommu_ops_amd;
|
|
|
|
void iommu_cleanup(void);
|
|
void *iommu_host_domain(void);
|
|
void *iommu_create_domain(vm_paddr_t maxaddr);
|
|
void iommu_destroy_domain(void *dom);
|
|
void iommu_create_mapping(void *dom, vm_paddr_t gpa, vm_paddr_t hpa,
|
|
size_t len);
|
|
void iommu_remove_mapping(void *dom, vm_paddr_t gpa, size_t len);
|
|
void iommu_add_device(void *dom, uint16_t rid);
|
|
void iommu_remove_device(void *dom, uint16_t rid);
|
|
void iommu_invalidate_tlb(void *domain);
|
|
#endif
|