1925586e03
Add a new ioctl to disable all MSI-X interrupts for a PCI passthrough device and invoke it if a write to the MSI-X capability registers disables MSI-X. This avoids leaving MSI-X interrupts enabled on the host if a guest device driver has disabled them (e.g. as part of detaching a guest device driver). This was found by Chelsio QA when testing that a Linux guest could switch from MSI-X to MSI interrupts when using the cxgb4vf driver. While here, explicitly fail requests to enable MSI on a passthrough device if MSI-X is enabled and vice versa. Reported by: Sony Arpita Das @ Chelsio Reviewed by: grehan, markj MFC after: 2 weeks Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D27212
58 lines
2.4 KiB
C
58 lines
2.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _IO_PPT_H_
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#define _IO_PPT_H_
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int ppt_unassign_all(struct vm *vm);
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int ppt_map_mmio(struct vm *vm, int bus, int slot, int func,
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vm_paddr_t gpa, size_t len, vm_paddr_t hpa);
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int ppt_setup_msi(struct vm *vm, int vcpu, int bus, int slot, int func,
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uint64_t addr, uint64_t msg, int numvec);
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int ppt_setup_msix(struct vm *vm, int vcpu, int bus, int slot, int func,
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int idx, uint64_t addr, uint64_t msg, uint32_t vector_control);
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int ppt_disable_msix(struct vm *vm, int bus, int slot, int func);
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int ppt_assigned_devices(struct vm *vm);
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bool ppt_is_mmio(struct vm *vm, vm_paddr_t gpa);
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/*
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* Returns the number of devices sequestered by the ppt driver for assignment
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* to virtual machines.
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*/
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int ppt_avail_devices(void);
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/*
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* The following functions should never be called directly.
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* Use 'vm_assign_pptdev()' and 'vm_unassign_pptdev()' instead.
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*/
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int ppt_assign_device(struct vm *vm, int bus, int slot, int func);
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int ppt_unassign_device(struct vm *vm, int bus, int slot, int func);
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#endif
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