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hw/vfio: create common module
A new common module is created. It implements all functions that have no device specificity (PCI, Platform). This patch only consists in move (no functional changes) Signed-off-by: Kim Phillips <kim.phillips@linaro.org> Signed-off-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Eric Auger
Alex Williamson
parent
df92ee4448
commit
e2c7d025ad
@ -1,3 +1,4 @@
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ifeq ($(CONFIG_LINUX), y)
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obj-$(CONFIG_SOFTMMU) += common.o
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obj-$(CONFIG_PCI) += pci.o
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endif
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959
hw/vfio/common.c
Normal file
959
hw/vfio/common.c
Normal file
@ -0,0 +1,959 @@
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/*
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* generic functions used by VFIO devices
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*
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Alex Williamson <alex.williamson@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on qemu-kvm device-assignment:
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* Adapted for KVM by Qumranet.
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* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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*/
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <linux/vfio.h>
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#include "hw/vfio/vfio-common.h"
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#include "hw/vfio/vfio.h"
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#include "exec/address-spaces.h"
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#include "exec/memory.h"
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#include "hw/hw.h"
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#include "qemu/error-report.h"
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#include "sysemu/kvm.h"
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#include "trace.h"
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struct vfio_group_head vfio_group_list =
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QLIST_HEAD_INITIALIZER(vfio_address_spaces);
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struct vfio_as_head vfio_address_spaces =
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QLIST_HEAD_INITIALIZER(vfio_address_spaces);
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#ifdef CONFIG_KVM
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/*
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* We have a single VFIO pseudo device per KVM VM. Once created it lives
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* for the life of the VM. Closing the file descriptor only drops our
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* reference to it and the device's reference to kvm. Therefore once
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* initialized, this file descriptor is only released on QEMU exit and
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* we'll re-use it should another vfio device be attached before then.
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*/
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static int vfio_kvm_device_fd = -1;
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#endif
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/*
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* Common VFIO interrupt disable
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*/
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void vfio_disable_irqindex(VFIODevice *vbasedev, int index)
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{
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struct vfio_irq_set irq_set = {
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.argsz = sizeof(irq_set),
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.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
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.index = index,
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.start = 0,
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.count = 0,
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};
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ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
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}
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void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index)
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{
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struct vfio_irq_set irq_set = {
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.argsz = sizeof(irq_set),
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.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
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.index = index,
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.start = 0,
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.count = 1,
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};
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ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
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}
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void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index)
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{
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struct vfio_irq_set irq_set = {
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.argsz = sizeof(irq_set),
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.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK,
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.index = index,
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.start = 0,
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.count = 1,
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};
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ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
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}
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/*
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* IO Port/MMIO - Beware of the endians, VFIO is always little endian
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*/
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void vfio_region_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size)
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{
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VFIORegion *region = opaque;
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VFIODevice *vbasedev = region->vbasedev;
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union {
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uint8_t byte;
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uint16_t word;
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uint32_t dword;
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uint64_t qword;
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} buf;
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switch (size) {
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case 1:
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buf.byte = data;
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break;
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case 2:
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buf.word = cpu_to_le16(data);
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break;
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case 4:
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buf.dword = cpu_to_le32(data);
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break;
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default:
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hw_error("vfio: unsupported write size, %d bytes", size);
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break;
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}
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if (pwrite(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
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error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64
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",%d) failed: %m",
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__func__, vbasedev->name, region->nr,
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addr, data, size);
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}
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trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size);
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/*
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* A read or write to a BAR always signals an INTx EOI. This will
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* do nothing if not pending (including not in INTx mode). We assume
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* that a BAR access is in response to an interrupt and that BAR
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* accesses will service the interrupt. Unfortunately, we don't know
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* which access will service the interrupt, so we're potentially
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* getting quite a few host interrupts per guest interrupt.
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*/
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vbasedev->ops->vfio_eoi(vbasedev);
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}
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uint64_t vfio_region_read(void *opaque,
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hwaddr addr, unsigned size)
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{
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VFIORegion *region = opaque;
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VFIODevice *vbasedev = region->vbasedev;
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union {
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uint8_t byte;
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uint16_t word;
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uint32_t dword;
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uint64_t qword;
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} buf;
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uint64_t data = 0;
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if (pread(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
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error_report("%s(%s:region%d+0x%"HWADDR_PRIx", %d) failed: %m",
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__func__, vbasedev->name, region->nr,
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addr, size);
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return (uint64_t)-1;
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}
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switch (size) {
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case 1:
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data = buf.byte;
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break;
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case 2:
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data = le16_to_cpu(buf.word);
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break;
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case 4:
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data = le32_to_cpu(buf.dword);
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break;
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default:
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hw_error("vfio: unsupported read size, %d bytes", size);
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break;
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}
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trace_vfio_region_read(vbasedev->name, region->nr, addr, size, data);
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/* Same as write above */
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vbasedev->ops->vfio_eoi(vbasedev);
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return data;
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}
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const MemoryRegionOps vfio_region_ops = {
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.read = vfio_region_read,
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.write = vfio_region_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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};
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/*
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* DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
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*/
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static int vfio_dma_unmap(VFIOContainer *container,
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hwaddr iova, ram_addr_t size)
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{
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struct vfio_iommu_type1_dma_unmap unmap = {
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.argsz = sizeof(unmap),
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.flags = 0,
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.iova = iova,
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.size = size,
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};
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if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
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error_report("VFIO_UNMAP_DMA: %d\n", -errno);
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return -errno;
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}
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return 0;
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}
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static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
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ram_addr_t size, void *vaddr, bool readonly)
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{
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struct vfio_iommu_type1_dma_map map = {
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.argsz = sizeof(map),
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.flags = VFIO_DMA_MAP_FLAG_READ,
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.vaddr = (__u64)(uintptr_t)vaddr,
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.iova = iova,
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.size = size,
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};
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if (!readonly) {
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map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
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}
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/*
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* Try the mapping, if it fails with EBUSY, unmap the region and try
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* again. This shouldn't be necessary, but we sometimes see it in
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* the the VGA ROM space.
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*/
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if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
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(errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
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ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
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return 0;
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}
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error_report("VFIO_MAP_DMA: %d\n", -errno);
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return -errno;
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}
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static bool vfio_listener_skipped_section(MemoryRegionSection *section)
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{
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return (!memory_region_is_ram(section->mr) &&
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!memory_region_is_iommu(section->mr)) ||
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/*
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* Sizing an enabled 64-bit BAR can cause spurious mappings to
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* addresses in the upper part of the 64-bit address space. These
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* are never accessed by the CPU and beyond the address width of
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* some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
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*/
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section->offset_within_address_space & (1ULL << 63);
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}
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static void vfio_iommu_map_notify(Notifier *n, void *data)
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{
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VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
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VFIOContainer *container = giommu->container;
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IOMMUTLBEntry *iotlb = data;
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MemoryRegion *mr;
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hwaddr xlat;
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hwaddr len = iotlb->addr_mask + 1;
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void *vaddr;
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int ret;
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trace_vfio_iommu_map_notify(iotlb->iova,
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iotlb->iova + iotlb->addr_mask);
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/*
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* The IOMMU TLB entry we have just covers translation through
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* this IOMMU to its immediate target. We need to translate
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* it the rest of the way through to memory.
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*/
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mr = address_space_translate(&address_space_memory,
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iotlb->translated_addr,
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&xlat, &len, iotlb->perm & IOMMU_WO);
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if (!memory_region_is_ram(mr)) {
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error_report("iommu map to non memory area %"HWADDR_PRIx"\n",
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xlat);
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return;
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}
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/*
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* Translation truncates length to the IOMMU page size,
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* check that it did not truncate too much.
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*/
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if (len & iotlb->addr_mask) {
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error_report("iommu has granularity incompatible with target AS\n");
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return;
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}
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if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
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vaddr = memory_region_get_ram_ptr(mr) + xlat;
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ret = vfio_dma_map(container, iotlb->iova,
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iotlb->addr_mask + 1, vaddr,
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!(iotlb->perm & IOMMU_WO) || mr->readonly);
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if (ret) {
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error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
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"0x%"HWADDR_PRIx", %p) = %d (%m)",
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container, iotlb->iova,
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iotlb->addr_mask + 1, vaddr, ret);
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}
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} else {
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ret = vfio_dma_unmap(container, iotlb->iova, iotlb->addr_mask + 1);
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if (ret) {
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error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
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"0x%"HWADDR_PRIx") = %d (%m)",
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container, iotlb->iova,
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iotlb->addr_mask + 1, ret);
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}
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}
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}
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static void vfio_listener_region_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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VFIOContainer *container = container_of(listener, VFIOContainer,
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iommu_data.type1.listener);
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hwaddr iova, end;
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Int128 llend;
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void *vaddr;
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int ret;
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if (vfio_listener_skipped_section(section)) {
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trace_vfio_listener_region_add_skip(
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section->offset_within_address_space,
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section->offset_within_address_space +
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int128_get64(int128_sub(section->size, int128_one())));
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return;
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}
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if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
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(section->offset_within_region & ~TARGET_PAGE_MASK))) {
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error_report("%s received unaligned region", __func__);
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return;
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}
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iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
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llend = int128_make64(section->offset_within_address_space);
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llend = int128_add(llend, section->size);
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llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK));
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if (int128_ge(int128_make64(iova), llend)) {
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return;
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}
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memory_region_ref(section->mr);
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if (memory_region_is_iommu(section->mr)) {
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VFIOGuestIOMMU *giommu;
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trace_vfio_listener_region_add_iommu(iova,
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int128_get64(int128_sub(llend, int128_one())));
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/*
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* FIXME: We should do some checking to see if the
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* capabilities of the host VFIO IOMMU are adequate to model
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* the guest IOMMU
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*
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* FIXME: For VFIO iommu types which have KVM acceleration to
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* avoid bouncing all map/unmaps through qemu this way, this
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* would be the right place to wire that up (tell the KVM
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* device emulation the VFIO iommu handles to use).
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*/
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/*
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* This assumes that the guest IOMMU is empty of
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* mappings at this point.
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*
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* One way of doing this is:
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* 1. Avoid sharing IOMMUs between emulated devices or different
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* IOMMU groups.
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* 2. Implement VFIO_IOMMU_ENABLE in the host kernel to fail if
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* there are some mappings in IOMMU.
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*
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* VFIO on SPAPR does that. Other IOMMU models may do that different,
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* they must make sure there are no existing mappings or
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* loop through existing mappings to map them into VFIO.
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*/
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giommu = g_malloc0(sizeof(*giommu));
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giommu->iommu = section->mr;
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giommu->container = container;
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giommu->n.notify = vfio_iommu_map_notify;
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QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next);
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memory_region_register_iommu_notifier(giommu->iommu, &giommu->n);
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return;
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}
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/* Here we assume that memory_region_is_ram(section->mr)==true */
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end = int128_get64(llend);
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vaddr = memory_region_get_ram_ptr(section->mr) +
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section->offset_within_region +
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(iova - section->offset_within_address_space);
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trace_vfio_listener_region_add_ram(iova, end - 1, vaddr);
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ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly);
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if (ret) {
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error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
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"0x%"HWADDR_PRIx", %p) = %d (%m)",
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container, iova, end - iova, vaddr, ret);
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/*
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* On the initfn path, store the first error in the container so we
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* can gracefully fail. Runtime, there's not much we can do other
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* than throw a hardware error.
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*/
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if (!container->iommu_data.type1.initialized) {
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if (!container->iommu_data.type1.error) {
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container->iommu_data.type1.error = ret;
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}
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} else {
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hw_error("vfio: DMA mapping failed, unable to continue");
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}
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}
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}
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static void vfio_listener_region_del(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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VFIOContainer *container = container_of(listener, VFIOContainer,
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iommu_data.type1.listener);
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hwaddr iova, end;
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int ret;
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if (vfio_listener_skipped_section(section)) {
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trace_vfio_listener_region_del_skip(
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section->offset_within_address_space,
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section->offset_within_address_space +
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int128_get64(int128_sub(section->size, int128_one())));
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return;
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}
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if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
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(section->offset_within_region & ~TARGET_PAGE_MASK))) {
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error_report("%s received unaligned region", __func__);
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return;
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}
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if (memory_region_is_iommu(section->mr)) {
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||||
VFIOGuestIOMMU *giommu;
|
||||
|
||||
QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
|
||||
if (giommu->iommu == section->mr) {
|
||||
memory_region_unregister_iommu_notifier(&giommu->n);
|
||||
QLIST_REMOVE(giommu, giommu_next);
|
||||
g_free(giommu);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* FIXME: We assume the one big unmap below is adequate to
|
||||
* remove any individual page mappings in the IOMMU which
|
||||
* might have been copied into VFIO. This works for a page table
|
||||
* based IOMMU where a big unmap flattens a large range of IO-PTEs.
|
||||
* That may not be true for all IOMMU types.
|
||||
*/
|
||||
}
|
||||
|
||||
iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
|
||||
end = (section->offset_within_address_space + int128_get64(section->size)) &
|
||||
TARGET_PAGE_MASK;
|
||||
|
||||
if (iova >= end) {
|
||||
return;
|
||||
}
|
||||
|
||||
trace_vfio_listener_region_del(iova, end - 1);
|
||||
|
||||
ret = vfio_dma_unmap(container, iova, end - iova);
|
||||
memory_region_unref(section->mr);
|
||||
if (ret) {
|
||||
error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
|
||||
"0x%"HWADDR_PRIx") = %d (%m)",
|
||||
container, iova, end - iova, ret);
|
||||
}
|
||||
}
|
||||
|
||||
const MemoryListener vfio_memory_listener = {
|
||||
.region_add = vfio_listener_region_add,
|
||||
.region_del = vfio_listener_region_del,
|
||||
};
|
||||
|
||||
void vfio_listener_release(VFIOContainer *container)
|
||||
{
|
||||
memory_listener_unregister(&container->iommu_data.type1.listener);
|
||||
}
|
||||
|
||||
int vfio_mmap_region(Object *obj, VFIORegion *region,
|
||||
MemoryRegion *mem, MemoryRegion *submem,
|
||||
void **map, size_t size, off_t offset,
|
||||
const char *name)
|
||||
{
|
||||
int ret = 0;
|
||||
VFIODevice *vbasedev = region->vbasedev;
|
||||
|
||||
if (VFIO_ALLOW_MMAP && size && region->flags &
|
||||
VFIO_REGION_INFO_FLAG_MMAP) {
|
||||
int prot = 0;
|
||||
|
||||
if (region->flags & VFIO_REGION_INFO_FLAG_READ) {
|
||||
prot |= PROT_READ;
|
||||
}
|
||||
|
||||
if (region->flags & VFIO_REGION_INFO_FLAG_WRITE) {
|
||||
prot |= PROT_WRITE;
|
||||
}
|
||||
|
||||
*map = mmap(NULL, size, prot, MAP_SHARED,
|
||||
vbasedev->fd,
|
||||
region->fd_offset + offset);
|
||||
if (*map == MAP_FAILED) {
|
||||
*map = NULL;
|
||||
ret = -errno;
|
||||
goto empty_region;
|
||||
}
|
||||
|
||||
memory_region_init_ram_ptr(submem, obj, name, size, *map);
|
||||
memory_region_set_skip_dump(submem);
|
||||
} else {
|
||||
empty_region:
|
||||
/* Create a zero sized sub-region to make cleanup easy. */
|
||||
memory_region_init(submem, obj, name, 0);
|
||||
}
|
||||
|
||||
memory_region_add_subregion(mem, offset, submem);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void vfio_reset_handler(void *opaque)
|
||||
{
|
||||
VFIOGroup *group;
|
||||
VFIODevice *vbasedev;
|
||||
|
||||
QLIST_FOREACH(group, &vfio_group_list, next) {
|
||||
QLIST_FOREACH(vbasedev, &group->device_list, next) {
|
||||
vbasedev->ops->vfio_compute_needs_reset(vbasedev);
|
||||
}
|
||||
}
|
||||
|
||||
QLIST_FOREACH(group, &vfio_group_list, next) {
|
||||
QLIST_FOREACH(vbasedev, &group->device_list, next) {
|
||||
if (vbasedev->needs_reset) {
|
||||
vbasedev->ops->vfio_hot_reset_multi(vbasedev);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void vfio_kvm_device_add_group(VFIOGroup *group)
|
||||
{
|
||||
#ifdef CONFIG_KVM
|
||||
struct kvm_device_attr attr = {
|
||||
.group = KVM_DEV_VFIO_GROUP,
|
||||
.attr = KVM_DEV_VFIO_GROUP_ADD,
|
||||
.addr = (uint64_t)(unsigned long)&group->fd,
|
||||
};
|
||||
|
||||
if (!kvm_enabled()) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (vfio_kvm_device_fd < 0) {
|
||||
struct kvm_create_device cd = {
|
||||
.type = KVM_DEV_TYPE_VFIO,
|
||||
};
|
||||
|
||||
if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
|
||||
error_report("KVM_CREATE_DEVICE: %m\n");
|
||||
return;
|
||||
}
|
||||
|
||||
vfio_kvm_device_fd = cd.fd;
|
||||
}
|
||||
|
||||
if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
|
||||
error_report("Failed to add group %d to KVM VFIO device: %m",
|
||||
group->groupid);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static void vfio_kvm_device_del_group(VFIOGroup *group)
|
||||
{
|
||||
#ifdef CONFIG_KVM
|
||||
struct kvm_device_attr attr = {
|
||||
.group = KVM_DEV_VFIO_GROUP,
|
||||
.attr = KVM_DEV_VFIO_GROUP_DEL,
|
||||
.addr = (uint64_t)(unsigned long)&group->fd,
|
||||
};
|
||||
|
||||
if (vfio_kvm_device_fd < 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
|
||||
error_report("Failed to remove group %d from KVM VFIO device: %m",
|
||||
group->groupid);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
|
||||
{
|
||||
VFIOAddressSpace *space;
|
||||
|
||||
QLIST_FOREACH(space, &vfio_address_spaces, list) {
|
||||
if (space->as == as) {
|
||||
return space;
|
||||
}
|
||||
}
|
||||
|
||||
/* No suitable VFIOAddressSpace, create a new one */
|
||||
space = g_malloc0(sizeof(*space));
|
||||
space->as = as;
|
||||
QLIST_INIT(&space->containers);
|
||||
|
||||
QLIST_INSERT_HEAD(&vfio_address_spaces, space, list);
|
||||
|
||||
return space;
|
||||
}
|
||||
|
||||
static void vfio_put_address_space(VFIOAddressSpace *space)
|
||||
{
|
||||
if (QLIST_EMPTY(&space->containers)) {
|
||||
QLIST_REMOVE(space, list);
|
||||
g_free(space);
|
||||
}
|
||||
}
|
||||
|
||||
static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
|
||||
{
|
||||
VFIOContainer *container;
|
||||
int ret, fd;
|
||||
VFIOAddressSpace *space;
|
||||
|
||||
space = vfio_get_address_space(as);
|
||||
|
||||
QLIST_FOREACH(container, &space->containers, next) {
|
||||
if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
|
||||
group->container = container;
|
||||
QLIST_INSERT_HEAD(&container->group_list, group, container_next);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
fd = qemu_open("/dev/vfio/vfio", O_RDWR);
|
||||
if (fd < 0) {
|
||||
error_report("vfio: failed to open /dev/vfio/vfio: %m");
|
||||
ret = -errno;
|
||||
goto put_space_exit;
|
||||
}
|
||||
|
||||
ret = ioctl(fd, VFIO_GET_API_VERSION);
|
||||
if (ret != VFIO_API_VERSION) {
|
||||
error_report("vfio: supported vfio version: %d, "
|
||||
"reported version: %d", VFIO_API_VERSION, ret);
|
||||
ret = -EINVAL;
|
||||
goto close_fd_exit;
|
||||
}
|
||||
|
||||
container = g_malloc0(sizeof(*container));
|
||||
container->space = space;
|
||||
container->fd = fd;
|
||||
if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
|
||||
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to set group container: %m");
|
||||
ret = -errno;
|
||||
goto free_container_exit;
|
||||
}
|
||||
|
||||
ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to set iommu for container: %m");
|
||||
ret = -errno;
|
||||
goto free_container_exit;
|
||||
}
|
||||
|
||||
container->iommu_data.type1.listener = vfio_memory_listener;
|
||||
container->iommu_data.release = vfio_listener_release;
|
||||
|
||||
memory_listener_register(&container->iommu_data.type1.listener,
|
||||
container->space->as);
|
||||
|
||||
if (container->iommu_data.type1.error) {
|
||||
ret = container->iommu_data.type1.error;
|
||||
error_report("vfio: memory listener initialization failed for container");
|
||||
goto listener_release_exit;
|
||||
}
|
||||
|
||||
container->iommu_data.type1.initialized = true;
|
||||
|
||||
} else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
|
||||
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to set group container: %m");
|
||||
ret = -errno;
|
||||
goto free_container_exit;
|
||||
}
|
||||
ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_SPAPR_TCE_IOMMU);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to set iommu for container: %m");
|
||||
ret = -errno;
|
||||
goto free_container_exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* The host kernel code implementing VFIO_IOMMU_DISABLE is called
|
||||
* when container fd is closed so we do not call it explicitly
|
||||
* in this file.
|
||||
*/
|
||||
ret = ioctl(fd, VFIO_IOMMU_ENABLE);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to enable container: %m");
|
||||
ret = -errno;
|
||||
goto free_container_exit;
|
||||
}
|
||||
|
||||
container->iommu_data.type1.listener = vfio_memory_listener;
|
||||
container->iommu_data.release = vfio_listener_release;
|
||||
|
||||
memory_listener_register(&container->iommu_data.type1.listener,
|
||||
container->space->as);
|
||||
|
||||
} else {
|
||||
error_report("vfio: No available IOMMU models");
|
||||
ret = -EINVAL;
|
||||
goto free_container_exit;
|
||||
}
|
||||
|
||||
QLIST_INIT(&container->group_list);
|
||||
QLIST_INSERT_HEAD(&space->containers, container, next);
|
||||
|
||||
group->container = container;
|
||||
QLIST_INSERT_HEAD(&container->group_list, group, container_next);
|
||||
|
||||
return 0;
|
||||
listener_release_exit:
|
||||
vfio_listener_release(container);
|
||||
|
||||
free_container_exit:
|
||||
g_free(container);
|
||||
|
||||
close_fd_exit:
|
||||
close(fd);
|
||||
|
||||
put_space_exit:
|
||||
vfio_put_address_space(space);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void vfio_disconnect_container(VFIOGroup *group)
|
||||
{
|
||||
VFIOContainer *container = group->container;
|
||||
|
||||
if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
|
||||
error_report("vfio: error disconnecting group %d from container",
|
||||
group->groupid);
|
||||
}
|
||||
|
||||
QLIST_REMOVE(group, container_next);
|
||||
group->container = NULL;
|
||||
|
||||
if (QLIST_EMPTY(&container->group_list)) {
|
||||
VFIOAddressSpace *space = container->space;
|
||||
|
||||
if (container->iommu_data.release) {
|
||||
container->iommu_data.release(container);
|
||||
}
|
||||
QLIST_REMOVE(container, next);
|
||||
trace_vfio_disconnect_container(container->fd);
|
||||
close(container->fd);
|
||||
g_free(container);
|
||||
|
||||
vfio_put_address_space(space);
|
||||
}
|
||||
}
|
||||
|
||||
VFIOGroup *vfio_get_group(int groupid, AddressSpace *as)
|
||||
{
|
||||
VFIOGroup *group;
|
||||
char path[32];
|
||||
struct vfio_group_status status = { .argsz = sizeof(status) };
|
||||
|
||||
QLIST_FOREACH(group, &vfio_group_list, next) {
|
||||
if (group->groupid == groupid) {
|
||||
/* Found it. Now is it already in the right context? */
|
||||
if (group->container->space->as == as) {
|
||||
return group;
|
||||
} else {
|
||||
error_report("vfio: group %d used in multiple address spaces",
|
||||
group->groupid);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
group = g_malloc0(sizeof(*group));
|
||||
|
||||
snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
|
||||
group->fd = qemu_open(path, O_RDWR);
|
||||
if (group->fd < 0) {
|
||||
error_report("vfio: error opening %s: %m", path);
|
||||
goto free_group_exit;
|
||||
}
|
||||
|
||||
if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
|
||||
error_report("vfio: error getting group status: %m");
|
||||
goto close_fd_exit;
|
||||
}
|
||||
|
||||
if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
|
||||
error_report("vfio: error, group %d is not viable, please ensure "
|
||||
"all devices within the iommu_group are bound to their "
|
||||
"vfio bus driver.", groupid);
|
||||
goto close_fd_exit;
|
||||
}
|
||||
|
||||
group->groupid = groupid;
|
||||
QLIST_INIT(&group->device_list);
|
||||
|
||||
if (vfio_connect_container(group, as)) {
|
||||
error_report("vfio: failed to setup container for group %d", groupid);
|
||||
goto close_fd_exit;
|
||||
}
|
||||
|
||||
if (QLIST_EMPTY(&vfio_group_list)) {
|
||||
qemu_register_reset(vfio_reset_handler, NULL);
|
||||
}
|
||||
|
||||
QLIST_INSERT_HEAD(&vfio_group_list, group, next);
|
||||
|
||||
vfio_kvm_device_add_group(group);
|
||||
|
||||
return group;
|
||||
|
||||
close_fd_exit:
|
||||
close(group->fd);
|
||||
|
||||
free_group_exit:
|
||||
g_free(group);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void vfio_put_group(VFIOGroup *group)
|
||||
{
|
||||
if (!QLIST_EMPTY(&group->device_list)) {
|
||||
return;
|
||||
}
|
||||
|
||||
vfio_kvm_device_del_group(group);
|
||||
vfio_disconnect_container(group);
|
||||
QLIST_REMOVE(group, next);
|
||||
trace_vfio_put_group(group->fd);
|
||||
close(group->fd);
|
||||
g_free(group);
|
||||
|
||||
if (QLIST_EMPTY(&vfio_group_list)) {
|
||||
qemu_unregister_reset(vfio_reset_handler, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
int vfio_get_device(VFIOGroup *group, const char *name,
|
||||
VFIODevice *vbasedev)
|
||||
{
|
||||
struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
|
||||
int ret;
|
||||
|
||||
ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
|
||||
if (ret < 0) {
|
||||
error_report("vfio: error getting device %s from group %d: %m",
|
||||
name, group->groupid);
|
||||
error_printf("Verify all devices in group %d are bound to vfio-<bus> "
|
||||
"or pci-stub and not already in use\n", group->groupid);
|
||||
return ret;
|
||||
}
|
||||
|
||||
vbasedev->fd = ret;
|
||||
vbasedev->group = group;
|
||||
QLIST_INSERT_HEAD(&group->device_list, vbasedev, next);
|
||||
|
||||
ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_INFO, &dev_info);
|
||||
if (ret) {
|
||||
error_report("vfio: error getting device info: %m");
|
||||
goto error;
|
||||
}
|
||||
|
||||
vbasedev->num_irqs = dev_info.num_irqs;
|
||||
vbasedev->num_regions = dev_info.num_regions;
|
||||
vbasedev->flags = dev_info.flags;
|
||||
|
||||
trace_vfio_get_device(name, dev_info.flags, dev_info.num_regions,
|
||||
dev_info.num_irqs);
|
||||
|
||||
vbasedev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
|
||||
|
||||
ret = vbasedev->ops->vfio_populate_device(vbasedev);
|
||||
|
||||
error:
|
||||
if (ret) {
|
||||
vfio_put_base_device(vbasedev);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
void vfio_put_base_device(VFIODevice *vbasedev)
|
||||
{
|
||||
QLIST_REMOVE(vbasedev, next);
|
||||
vbasedev->group = NULL;
|
||||
trace_vfio_put_base_device(vbasedev->fd);
|
||||
close(vbasedev->fd);
|
||||
}
|
||||
|
||||
static int vfio_container_do_ioctl(AddressSpace *as, int32_t groupid,
|
||||
int req, void *param)
|
||||
{
|
||||
VFIOGroup *group;
|
||||
VFIOContainer *container;
|
||||
int ret = -1;
|
||||
|
||||
group = vfio_get_group(groupid, as);
|
||||
if (!group) {
|
||||
error_report("vfio: group %d not registered", groupid);
|
||||
return ret;
|
||||
}
|
||||
|
||||
container = group->container;
|
||||
if (group->container) {
|
||||
ret = ioctl(container->fd, req, param);
|
||||
if (ret < 0) {
|
||||
error_report("vfio: failed to ioctl container: ret=%d, %s",
|
||||
ret, strerror(errno));
|
||||
}
|
||||
}
|
||||
|
||||
vfio_put_group(group);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
|
||||
int req, void *param)
|
||||
{
|
||||
/* We allow only certain ioctls to the container */
|
||||
switch (req) {
|
||||
case VFIO_CHECK_EXTENSION:
|
||||
case VFIO_IOMMU_SPAPR_TCE_GET_INFO:
|
||||
break;
|
||||
default:
|
||||
/* Return an error on unknown requests */
|
||||
error_report("vfio: unsupported ioctl %X", req);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return vfio_container_do_ioctl(as, groupid, req, param);
|
||||
}
|
||||
1028
hw/vfio/pci.c
1028
hw/vfio/pci.c
File diff suppressed because it is too large
Load Diff
151
include/hw/vfio/vfio-common.h
Normal file
151
include/hw/vfio/vfio-common.h
Normal file
@ -0,0 +1,151 @@
|
||||
/*
|
||||
* common header for vfio based device assignment support
|
||||
*
|
||||
* Copyright Red Hat, Inc. 2012
|
||||
*
|
||||
* Authors:
|
||||
* Alex Williamson <alex.williamson@redhat.com>
|
||||
*
|
||||
* This work is licensed under the terms of the GNU GPL, version 2. See
|
||||
* the COPYING file in the top-level directory.
|
||||
*
|
||||
* Based on qemu-kvm device-assignment:
|
||||
* Adapted for KVM by Qumranet.
|
||||
* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
|
||||
* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
|
||||
* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
|
||||
* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
|
||||
* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
|
||||
*/
|
||||
#ifndef HW_VFIO_VFIO_COMMON_H
|
||||
#define HW_VFIO_VFIO_COMMON_H
|
||||
|
||||
#include "qemu-common.h"
|
||||
#include "exec/address-spaces.h"
|
||||
#include "exec/memory.h"
|
||||
#include "qemu/queue.h"
|
||||
#include "qemu/notify.h"
|
||||
|
||||
/*#define DEBUG_VFIO*/
|
||||
#ifdef DEBUG_VFIO
|
||||
#define DPRINTF(fmt, ...) \
|
||||
do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
|
||||
#else
|
||||
#define DPRINTF(fmt, ...) \
|
||||
do { } while (0)
|
||||
#endif
|
||||
|
||||
/* Extra debugging, trap acceleration paths for more logging */
|
||||
#define VFIO_ALLOW_MMAP 1
|
||||
#define VFIO_ALLOW_KVM_INTX 1
|
||||
#define VFIO_ALLOW_KVM_MSI 1
|
||||
#define VFIO_ALLOW_KVM_MSIX 1
|
||||
|
||||
enum {
|
||||
VFIO_DEVICE_TYPE_PCI = 0,
|
||||
};
|
||||
|
||||
typedef struct VFIORegion {
|
||||
struct VFIODevice *vbasedev;
|
||||
off_t fd_offset; /* offset of region within device fd */
|
||||
MemoryRegion mem; /* slow, read/write access */
|
||||
MemoryRegion mmap_mem; /* direct mapped access */
|
||||
void *mmap;
|
||||
size_t size;
|
||||
uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
|
||||
uint8_t nr; /* cache the region number for debug */
|
||||
} VFIORegion;
|
||||
|
||||
typedef struct VFIOAddressSpace {
|
||||
AddressSpace *as;
|
||||
QLIST_HEAD(, VFIOContainer) containers;
|
||||
QLIST_ENTRY(VFIOAddressSpace) list;
|
||||
} VFIOAddressSpace;
|
||||
|
||||
struct VFIOGroup;
|
||||
|
||||
typedef struct VFIOType1 {
|
||||
MemoryListener listener;
|
||||
int error;
|
||||
bool initialized;
|
||||
} VFIOType1;
|
||||
|
||||
typedef struct VFIOContainer {
|
||||
VFIOAddressSpace *space;
|
||||
int fd; /* /dev/vfio/vfio, empowered by the attached groups */
|
||||
struct {
|
||||
/* enable abstraction to support various iommu backends */
|
||||
union {
|
||||
VFIOType1 type1;
|
||||
};
|
||||
void (*release)(struct VFIOContainer *);
|
||||
} iommu_data;
|
||||
QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
|
||||
QLIST_HEAD(, VFIOGroup) group_list;
|
||||
QLIST_ENTRY(VFIOContainer) next;
|
||||
} VFIOContainer;
|
||||
|
||||
typedef struct VFIOGuestIOMMU {
|
||||
VFIOContainer *container;
|
||||
MemoryRegion *iommu;
|
||||
Notifier n;
|
||||
QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
|
||||
} VFIOGuestIOMMU;
|
||||
|
||||
typedef struct VFIODeviceOps VFIODeviceOps;
|
||||
|
||||
typedef struct VFIODevice {
|
||||
QLIST_ENTRY(VFIODevice) next;
|
||||
struct VFIOGroup *group;
|
||||
char *name;
|
||||
int fd;
|
||||
int type;
|
||||
bool reset_works;
|
||||
bool needs_reset;
|
||||
VFIODeviceOps *ops;
|
||||
unsigned int num_irqs;
|
||||
unsigned int num_regions;
|
||||
unsigned int flags;
|
||||
} VFIODevice;
|
||||
|
||||
struct VFIODeviceOps {
|
||||
void (*vfio_compute_needs_reset)(VFIODevice *vdev);
|
||||
int (*vfio_hot_reset_multi)(VFIODevice *vdev);
|
||||
void (*vfio_eoi)(VFIODevice *vdev);
|
||||
int (*vfio_populate_device)(VFIODevice *vdev);
|
||||
};
|
||||
|
||||
typedef struct VFIOGroup {
|
||||
int fd;
|
||||
int groupid;
|
||||
VFIOContainer *container;
|
||||
QLIST_HEAD(, VFIODevice) device_list;
|
||||
QLIST_ENTRY(VFIOGroup) next;
|
||||
QLIST_ENTRY(VFIOGroup) container_next;
|
||||
} VFIOGroup;
|
||||
|
||||
void vfio_put_base_device(VFIODevice *vbasedev);
|
||||
void vfio_disable_irqindex(VFIODevice *vbasedev, int index);
|
||||
void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index);
|
||||
void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index);
|
||||
void vfio_region_write(void *opaque, hwaddr addr,
|
||||
uint64_t data, unsigned size);
|
||||
uint64_t vfio_region_read(void *opaque,
|
||||
hwaddr addr, unsigned size);
|
||||
void vfio_listener_release(VFIOContainer *container);
|
||||
int vfio_mmap_region(Object *vdev, VFIORegion *region,
|
||||
MemoryRegion *mem, MemoryRegion *submem,
|
||||
void **map, size_t size, off_t offset,
|
||||
const char *name);
|
||||
void vfio_reset_handler(void *opaque);
|
||||
VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
|
||||
void vfio_put_group(VFIOGroup *group);
|
||||
int vfio_get_device(VFIOGroup *group, const char *name,
|
||||
VFIODevice *vbasedev);
|
||||
|
||||
extern const MemoryRegionOps vfio_region_ops;
|
||||
extern const MemoryListener vfio_memory_listener;
|
||||
extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
|
||||
extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
|
||||
|
||||
#endif /* !HW_VFIO_VFIO_COMMON_H */
|
||||
@ -1416,6 +1416,7 @@ vfio_pci_reset(const char *name) " (%s)"
|
||||
vfio_pci_reset_flr(const char *name) "%s FLR/VFIO_DEVICE_RESET"
|
||||
vfio_pci_reset_pm(const char *name) "%s PCI PM Reset"
|
||||
|
||||
# hw/vfio/vfio-common.c
|
||||
vfio_region_write(const char *name, int index, uint64_t addr, uint64_t data, unsigned size) " (%s:region%d+0x%"PRIx64", 0x%"PRIx64 ", %d)"
|
||||
vfio_region_read(char *name, int index, uint64_t addr, unsigned size, uint64_t data) " (%s:region%d+0x%"PRIx64", %d) = 0x%"PRIx64
|
||||
vfio_iommu_map_notify(uint64_t iova_start, uint64_t iova_end) "iommu map @ %"PRIx64" - %"PRIx64
|
||||
|
||||
Loading…
Reference in New Issue
Block a user