root / hw / kvm / pci-assign.c @ 0d09e41a
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/*
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* Copyright (c) 2007, Neocleus Corporation.
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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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*
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* Assign a PCI device from the host to a guest VM.
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*
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* This implementation uses the classic device assignment interface of KVM
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* and is only available on x86 hosts. It is expected to be obsoleted by VFIO
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* based device assignment.
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*
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* Adapted for KVM (qemu-kvm) by Qumranet. QEMU version was based on qemu-kvm
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* revision 4144fe9d48. See its repository for the history.
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*
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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 <stdio.h> |
24 |
#include <unistd.h> |
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#include <sys/io.h> |
26 |
#include <sys/mman.h> |
27 |
#include <sys/types.h> |
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#include <sys/stat.h> |
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#include "hw/hw.h" |
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#include "hw/i386/pc.h" |
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#include "qemu/error-report.h" |
32 |
#include "ui/console.h" |
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#include "hw/loader.h" |
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#include "monitor/monitor.h" |
35 |
#include "qemu/range.h" |
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#include "sysemu/sysemu.h" |
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#include "hw/pci/pci.h" |
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#include "hw/pci/msi.h" |
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#include "kvm_i386.h" |
40 |
|
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#define MSIX_PAGE_SIZE 0x1000 |
42 |
|
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/* From linux/ioport.h */
|
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#define IORESOURCE_IO 0x00000100 /* Resource type */ |
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#define IORESOURCE_MEM 0x00000200 |
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#define IORESOURCE_IRQ 0x00000400 |
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#define IORESOURCE_DMA 0x00000800 |
48 |
#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
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#define IORESOURCE_MEM_64 0x00100000 |
50 |
|
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//#define DEVICE_ASSIGNMENT_DEBUG
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|
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#ifdef DEVICE_ASSIGNMENT_DEBUG
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#define DEBUG(fmt, ...) \
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do { \
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fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__); \
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} while (0) |
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#else
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#define DEBUG(fmt, ...)
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#endif
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|
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typedef struct PCIRegion { |
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int type; /* Memory or port I/O */ |
64 |
int valid;
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uint64_t base_addr; |
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uint64_t size; /* size of the region */
|
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int resource_fd;
|
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} PCIRegion; |
69 |
|
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typedef struct PCIDevRegions { |
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uint8_t bus, dev, func; /* Bus inside domain, device and function */
|
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int irq; /* IRQ number */ |
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uint16_t region_number; /* number of active regions */
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|
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/* Port I/O or MMIO Regions */
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PCIRegion regions[PCI_NUM_REGIONS - 1];
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int config_fd;
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} PCIDevRegions; |
79 |
|
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typedef struct AssignedDevRegion { |
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MemoryRegion container; |
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MemoryRegion real_iomem; |
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union {
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uint8_t *r_virtbase; /* mmapped access address for memory regions */
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uint32_t r_baseport; /* the base guest port for I/O regions */
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} u; |
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pcibus_t e_size; /* emulated size of region in bytes */
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pcibus_t r_size; /* real size of region in bytes */
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PCIRegion *region; |
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} AssignedDevRegion; |
91 |
|
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#define ASSIGNED_DEVICE_PREFER_MSI_BIT 0 |
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#define ASSIGNED_DEVICE_SHARE_INTX_BIT 1 |
94 |
|
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#define ASSIGNED_DEVICE_PREFER_MSI_MASK (1 << ASSIGNED_DEVICE_PREFER_MSI_BIT) |
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#define ASSIGNED_DEVICE_SHARE_INTX_MASK (1 << ASSIGNED_DEVICE_SHARE_INTX_BIT) |
97 |
|
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typedef struct MSIXTableEntry { |
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uint32_t addr_lo; |
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uint32_t addr_hi; |
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uint32_t data; |
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uint32_t ctrl; |
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} MSIXTableEntry; |
104 |
|
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typedef enum AssignedIRQType { |
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ASSIGNED_IRQ_NONE = 0,
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ASSIGNED_IRQ_INTX_HOST_INTX, |
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ASSIGNED_IRQ_INTX_HOST_MSI, |
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ASSIGNED_IRQ_MSI, |
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ASSIGNED_IRQ_MSIX |
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} AssignedIRQType; |
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|
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typedef struct AssignedDevice { |
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PCIDevice dev; |
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PCIHostDeviceAddress host; |
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uint32_t dev_id; |
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uint32_t features; |
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int intpin;
|
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AssignedDevRegion v_addrs[PCI_NUM_REGIONS - 1];
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PCIDevRegions real_device; |
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PCIINTxRoute intx_route; |
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AssignedIRQType assigned_irq_type; |
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struct {
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#define ASSIGNED_DEVICE_CAP_MSI (1 << 0) |
125 |
#define ASSIGNED_DEVICE_CAP_MSIX (1 << 1) |
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uint32_t available; |
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#define ASSIGNED_DEVICE_MSI_ENABLED (1 << 0) |
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#define ASSIGNED_DEVICE_MSIX_ENABLED (1 << 1) |
129 |
#define ASSIGNED_DEVICE_MSIX_MASKED (1 << 2) |
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uint32_t state; |
131 |
} cap; |
132 |
uint8_t emulate_config_read[PCI_CONFIG_SPACE_SIZE]; |
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uint8_t emulate_config_write[PCI_CONFIG_SPACE_SIZE]; |
134 |
int msi_virq_nr;
|
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int *msi_virq;
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MSIXTableEntry *msix_table; |
137 |
hwaddr msix_table_addr; |
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uint16_t msix_max; |
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MemoryRegion mmio; |
140 |
char *configfd_name;
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int32_t bootindex; |
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} AssignedDevice; |
143 |
|
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static void assigned_dev_update_irq_routing(PCIDevice *dev); |
145 |
|
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static void assigned_dev_load_option_rom(AssignedDevice *dev); |
147 |
|
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static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev); |
149 |
|
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static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region,
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hwaddr addr, int size,
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uint64_t *data) |
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{ |
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uint64_t val = 0;
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int fd = dev_region->region->resource_fd;
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|
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if (fd >= 0) { |
158 |
if (data) {
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DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx |
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", addr="TARGET_FMT_plx"\n", *data, size, addr, addr); |
161 |
if (pwrite(fd, data, size, addr) != size) {
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error_report("%s - pwrite failed %s",
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__func__, strerror(errno)); |
164 |
} |
165 |
} else {
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if (pread(fd, &val, size, addr) != size) {
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error_report("%s - pread failed %s",
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__func__, strerror(errno)); |
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val = (1UL << (size * 8)) - 1; |
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} |
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DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx |
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", addr=" TARGET_FMT_plx "\n", val, size, addr, addr); |
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} |
174 |
} else {
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uint32_t port = addr + dev_region->u.r_baseport; |
176 |
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if (data) {
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DEBUG("out data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx |
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", host=%x\n", *data, size, addr, port);
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switch (size) {
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case 1: |
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outb(*data, port); |
183 |
break;
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184 |
case 2: |
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outw(*data, port); |
186 |
break;
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187 |
case 4: |
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outl(*data, port); |
189 |
break;
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190 |
} |
191 |
} else {
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switch (size) {
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case 1: |
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val = inb(port); |
195 |
break;
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196 |
case 2: |
197 |
val = inw(port); |
198 |
break;
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199 |
case 4: |
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val = inl(port); |
201 |
break;
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} |
203 |
DEBUG("in data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx |
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", host=%x\n", val, size, addr, port);
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} |
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} |
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return val;
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} |
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|
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static void assigned_dev_ioport_write(void *opaque, hwaddr addr, |
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uint64_t data, unsigned size)
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{ |
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assigned_dev_ioport_rw(opaque, addr, size, &data); |
214 |
} |
215 |
|
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static uint64_t assigned_dev_ioport_read(void *opaque, |
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hwaddr addr, unsigned size)
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{ |
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return assigned_dev_ioport_rw(opaque, addr, size, NULL); |
220 |
} |
221 |
|
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static uint32_t slow_bar_readb(void *opaque, hwaddr addr) |
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{ |
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AssignedDevRegion *d = opaque; |
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uint8_t *in = d->u.r_virtbase + addr; |
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uint32_t r; |
227 |
|
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r = *in; |
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DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); |
230 |
|
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return r;
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232 |
} |
233 |
|
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static uint32_t slow_bar_readw(void *opaque, hwaddr addr) |
235 |
{ |
236 |
AssignedDevRegion *d = opaque; |
237 |
uint16_t *in = (uint16_t *)(d->u.r_virtbase + addr); |
238 |
uint32_t r; |
239 |
|
240 |
r = *in; |
241 |
DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); |
242 |
|
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return r;
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} |
245 |
|
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static uint32_t slow_bar_readl(void *opaque, hwaddr addr) |
247 |
{ |
248 |
AssignedDevRegion *d = opaque; |
249 |
uint32_t *in = (uint32_t *)(d->u.r_virtbase + addr); |
250 |
uint32_t r; |
251 |
|
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r = *in; |
253 |
DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); |
254 |
|
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return r;
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256 |
} |
257 |
|
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static void slow_bar_writeb(void *opaque, hwaddr addr, uint32_t val) |
259 |
{ |
260 |
AssignedDevRegion *d = opaque; |
261 |
uint8_t *out = d->u.r_virtbase + addr; |
262 |
|
263 |
DEBUG("slow_bar_writeb addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr, val); |
264 |
*out = val; |
265 |
} |
266 |
|
267 |
static void slow_bar_writew(void *opaque, hwaddr addr, uint32_t val) |
268 |
{ |
269 |
AssignedDevRegion *d = opaque; |
270 |
uint16_t *out = (uint16_t *)(d->u.r_virtbase + addr); |
271 |
|
272 |
DEBUG("slow_bar_writew addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr, val); |
273 |
*out = val; |
274 |
} |
275 |
|
276 |
static void slow_bar_writel(void *opaque, hwaddr addr, uint32_t val) |
277 |
{ |
278 |
AssignedDevRegion *d = opaque; |
279 |
uint32_t *out = (uint32_t *)(d->u.r_virtbase + addr); |
280 |
|
281 |
DEBUG("slow_bar_writel addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, val); |
282 |
*out = val; |
283 |
} |
284 |
|
285 |
static const MemoryRegionOps slow_bar_ops = { |
286 |
.old_mmio = { |
287 |
.read = { slow_bar_readb, slow_bar_readw, slow_bar_readl, }, |
288 |
.write = { slow_bar_writeb, slow_bar_writew, slow_bar_writel, }, |
289 |
}, |
290 |
.endianness = DEVICE_NATIVE_ENDIAN, |
291 |
}; |
292 |
|
293 |
static void assigned_dev_iomem_setup(PCIDevice *pci_dev, int region_num, |
294 |
pcibus_t e_size) |
295 |
{ |
296 |
AssignedDevice *r_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
297 |
AssignedDevRegion *region = &r_dev->v_addrs[region_num]; |
298 |
PCIRegion *real_region = &r_dev->real_device.regions[region_num]; |
299 |
|
300 |
if (e_size > 0) { |
301 |
memory_region_init(®ion->container, "assigned-dev-container",
|
302 |
e_size); |
303 |
memory_region_add_subregion(®ion->container, 0, ®ion->real_iomem);
|
304 |
|
305 |
/* deal with MSI-X MMIO page */
|
306 |
if (real_region->base_addr <= r_dev->msix_table_addr &&
|
307 |
real_region->base_addr + real_region->size > |
308 |
r_dev->msix_table_addr) { |
309 |
uint64_t offset = r_dev->msix_table_addr - real_region->base_addr; |
310 |
|
311 |
memory_region_add_subregion_overlap(®ion->container, |
312 |
offset, |
313 |
&r_dev->mmio, |
314 |
1);
|
315 |
} |
316 |
} |
317 |
} |
318 |
|
319 |
static const MemoryRegionOps assigned_dev_ioport_ops = { |
320 |
.read = assigned_dev_ioport_read, |
321 |
.write = assigned_dev_ioport_write, |
322 |
.endianness = DEVICE_NATIVE_ENDIAN, |
323 |
}; |
324 |
|
325 |
static void assigned_dev_ioport_setup(PCIDevice *pci_dev, int region_num, |
326 |
pcibus_t size) |
327 |
{ |
328 |
AssignedDevice *r_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
329 |
AssignedDevRegion *region = &r_dev->v_addrs[region_num]; |
330 |
|
331 |
region->e_size = size; |
332 |
memory_region_init(®ion->container, "assigned-dev-container", size);
|
333 |
memory_region_init_io(®ion->real_iomem, &assigned_dev_ioport_ops, |
334 |
r_dev->v_addrs + region_num, |
335 |
"assigned-dev-iomem", size);
|
336 |
memory_region_add_subregion(®ion->container, 0, ®ion->real_iomem);
|
337 |
} |
338 |
|
339 |
static uint32_t assigned_dev_pci_read(PCIDevice *d, int pos, int len) |
340 |
{ |
341 |
AssignedDevice *pci_dev = DO_UPCAST(AssignedDevice, dev, d); |
342 |
uint32_t val; |
343 |
ssize_t ret; |
344 |
int fd = pci_dev->real_device.config_fd;
|
345 |
|
346 |
again:
|
347 |
ret = pread(fd, &val, len, pos); |
348 |
if (ret != len) {
|
349 |
if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) { |
350 |
goto again;
|
351 |
} |
352 |
|
353 |
hw_error("pci read failed, ret = %zd errno = %d\n", ret, errno);
|
354 |
} |
355 |
|
356 |
return val;
|
357 |
} |
358 |
|
359 |
static uint8_t assigned_dev_pci_read_byte(PCIDevice *d, int pos) |
360 |
{ |
361 |
return (uint8_t)assigned_dev_pci_read(d, pos, 1); |
362 |
} |
363 |
|
364 |
static void assigned_dev_pci_write(PCIDevice *d, int pos, uint32_t val, int len) |
365 |
{ |
366 |
AssignedDevice *pci_dev = DO_UPCAST(AssignedDevice, dev, d); |
367 |
ssize_t ret; |
368 |
int fd = pci_dev->real_device.config_fd;
|
369 |
|
370 |
again:
|
371 |
ret = pwrite(fd, &val, len, pos); |
372 |
if (ret != len) {
|
373 |
if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) { |
374 |
goto again;
|
375 |
} |
376 |
|
377 |
hw_error("pci write failed, ret = %zd errno = %d\n", ret, errno);
|
378 |
} |
379 |
} |
380 |
|
381 |
static void assigned_dev_emulate_config_read(AssignedDevice *dev, |
382 |
uint32_t offset, uint32_t len) |
383 |
{ |
384 |
memset(dev->emulate_config_read + offset, 0xff, len);
|
385 |
} |
386 |
|
387 |
static void assigned_dev_direct_config_read(AssignedDevice *dev, |
388 |
uint32_t offset, uint32_t len) |
389 |
{ |
390 |
memset(dev->emulate_config_read + offset, 0, len);
|
391 |
} |
392 |
|
393 |
static void assigned_dev_direct_config_write(AssignedDevice *dev, |
394 |
uint32_t offset, uint32_t len) |
395 |
{ |
396 |
memset(dev->emulate_config_write + offset, 0, len);
|
397 |
} |
398 |
|
399 |
static uint8_t pci_find_cap_offset(PCIDevice *d, uint8_t cap, uint8_t start)
|
400 |
{ |
401 |
int id;
|
402 |
int max_cap = 48; |
403 |
int pos = start ? start : PCI_CAPABILITY_LIST;
|
404 |
int status;
|
405 |
|
406 |
status = assigned_dev_pci_read_byte(d, PCI_STATUS); |
407 |
if ((status & PCI_STATUS_CAP_LIST) == 0) { |
408 |
return 0; |
409 |
} |
410 |
|
411 |
while (max_cap--) {
|
412 |
pos = assigned_dev_pci_read_byte(d, pos); |
413 |
if (pos < 0x40) { |
414 |
break;
|
415 |
} |
416 |
|
417 |
pos &= ~3;
|
418 |
id = assigned_dev_pci_read_byte(d, pos + PCI_CAP_LIST_ID); |
419 |
|
420 |
if (id == 0xff) { |
421 |
break;
|
422 |
} |
423 |
if (id == cap) {
|
424 |
return pos;
|
425 |
} |
426 |
|
427 |
pos += PCI_CAP_LIST_NEXT; |
428 |
} |
429 |
return 0; |
430 |
} |
431 |
|
432 |
static int assigned_dev_register_regions(PCIRegion *io_regions, |
433 |
unsigned long regions_num, |
434 |
AssignedDevice *pci_dev) |
435 |
{ |
436 |
uint32_t i; |
437 |
PCIRegion *cur_region = io_regions; |
438 |
|
439 |
for (i = 0; i < regions_num; i++, cur_region++) { |
440 |
if (!cur_region->valid) {
|
441 |
continue;
|
442 |
} |
443 |
|
444 |
/* handle memory io regions */
|
445 |
if (cur_region->type & IORESOURCE_MEM) {
|
446 |
int t = PCI_BASE_ADDRESS_SPACE_MEMORY;
|
447 |
if (cur_region->type & IORESOURCE_PREFETCH) {
|
448 |
t |= PCI_BASE_ADDRESS_MEM_PREFETCH; |
449 |
} |
450 |
if (cur_region->type & IORESOURCE_MEM_64) {
|
451 |
t |= PCI_BASE_ADDRESS_MEM_TYPE_64; |
452 |
} |
453 |
|
454 |
/* map physical memory */
|
455 |
pci_dev->v_addrs[i].u.r_virtbase = mmap(NULL, cur_region->size,
|
456 |
PROT_WRITE | PROT_READ, |
457 |
MAP_SHARED, |
458 |
cur_region->resource_fd, |
459 |
(off_t)0);
|
460 |
|
461 |
if (pci_dev->v_addrs[i].u.r_virtbase == MAP_FAILED) {
|
462 |
pci_dev->v_addrs[i].u.r_virtbase = NULL;
|
463 |
error_report("%s: Error: Couldn't mmap 0x%" PRIx64 "!", |
464 |
__func__, cur_region->base_addr); |
465 |
return -1; |
466 |
} |
467 |
|
468 |
pci_dev->v_addrs[i].r_size = cur_region->size; |
469 |
pci_dev->v_addrs[i].e_size = 0;
|
470 |
|
471 |
/* add offset */
|
472 |
pci_dev->v_addrs[i].u.r_virtbase += |
473 |
(cur_region->base_addr & 0xFFF);
|
474 |
|
475 |
if (cur_region->size & 0xFFF) { |
476 |
error_report("PCI region %d at address 0x%" PRIx64 " has " |
477 |
"size 0x%" PRIx64 ", which is not a multiple of " |
478 |
"4K. You might experience some performance hit "
|
479 |
"due to that.",
|
480 |
i, cur_region->base_addr, cur_region->size); |
481 |
memory_region_init_io(&pci_dev->v_addrs[i].real_iomem, |
482 |
&slow_bar_ops, &pci_dev->v_addrs[i], |
483 |
"assigned-dev-slow-bar",
|
484 |
cur_region->size); |
485 |
} else {
|
486 |
void *virtbase = pci_dev->v_addrs[i].u.r_virtbase;
|
487 |
char name[32]; |
488 |
snprintf(name, sizeof(name), "%s.bar%d", |
489 |
object_get_typename(OBJECT(pci_dev)), i); |
490 |
memory_region_init_ram_ptr(&pci_dev->v_addrs[i].real_iomem, |
491 |
name, cur_region->size, |
492 |
virtbase); |
493 |
vmstate_register_ram(&pci_dev->v_addrs[i].real_iomem, |
494 |
&pci_dev->dev.qdev); |
495 |
} |
496 |
|
497 |
assigned_dev_iomem_setup(&pci_dev->dev, i, cur_region->size); |
498 |
pci_register_bar((PCIDevice *) pci_dev, i, t, |
499 |
&pci_dev->v_addrs[i].container); |
500 |
continue;
|
501 |
} else {
|
502 |
/* handle port io regions */
|
503 |
uint32_t val; |
504 |
int ret;
|
505 |
|
506 |
/* Test kernel support for ioport resource read/write. Old
|
507 |
* kernels return EIO. New kernels only allow 1/2/4 byte reads
|
508 |
* so should return EINVAL for a 3 byte read */
|
509 |
ret = pread(pci_dev->v_addrs[i].region->resource_fd, &val, 3, 0); |
510 |
if (ret >= 0) { |
511 |
error_report("Unexpected return from I/O port read: %d", ret);
|
512 |
abort(); |
513 |
} else if (errno != EINVAL) { |
514 |
error_report("Kernel doesn't support ioport resource "
|
515 |
"access, hiding this region.");
|
516 |
close(pci_dev->v_addrs[i].region->resource_fd); |
517 |
cur_region->valid = 0;
|
518 |
continue;
|
519 |
} |
520 |
|
521 |
pci_dev->v_addrs[i].u.r_baseport = cur_region->base_addr; |
522 |
pci_dev->v_addrs[i].r_size = cur_region->size; |
523 |
pci_dev->v_addrs[i].e_size = 0;
|
524 |
|
525 |
assigned_dev_ioport_setup(&pci_dev->dev, i, cur_region->size); |
526 |
pci_register_bar((PCIDevice *) pci_dev, i, |
527 |
PCI_BASE_ADDRESS_SPACE_IO, |
528 |
&pci_dev->v_addrs[i].container); |
529 |
} |
530 |
} |
531 |
|
532 |
/* success */
|
533 |
return 0; |
534 |
} |
535 |
|
536 |
static int get_real_id(const char *devpath, const char *idname, uint16_t *val) |
537 |
{ |
538 |
FILE *f; |
539 |
char name[128]; |
540 |
long id;
|
541 |
|
542 |
snprintf(name, sizeof(name), "%s%s", devpath, idname); |
543 |
f = fopen(name, "r");
|
544 |
if (f == NULL) { |
545 |
error_report("%s: %s: %m", __func__, name);
|
546 |
return -1; |
547 |
} |
548 |
if (fscanf(f, "%li\n", &id) == 1) { |
549 |
*val = id; |
550 |
} else {
|
551 |
return -1; |
552 |
} |
553 |
fclose(f); |
554 |
|
555 |
return 0; |
556 |
} |
557 |
|
558 |
static int get_real_vendor_id(const char *devpath, uint16_t *val) |
559 |
{ |
560 |
return get_real_id(devpath, "vendor", val); |
561 |
} |
562 |
|
563 |
static int get_real_device_id(const char *devpath, uint16_t *val) |
564 |
{ |
565 |
return get_real_id(devpath, "device", val); |
566 |
} |
567 |
|
568 |
static int get_real_device(AssignedDevice *pci_dev, uint16_t r_seg, |
569 |
uint8_t r_bus, uint8_t r_dev, uint8_t r_func) |
570 |
{ |
571 |
char dir[128], name[128]; |
572 |
int fd, r = 0, v; |
573 |
FILE *f; |
574 |
uint64_t start, end, size, flags; |
575 |
uint16_t id; |
576 |
PCIRegion *rp; |
577 |
PCIDevRegions *dev = &pci_dev->real_device; |
578 |
|
579 |
dev->region_number = 0;
|
580 |
|
581 |
snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%x/", |
582 |
r_seg, r_bus, r_dev, r_func); |
583 |
|
584 |
snprintf(name, sizeof(name), "%sconfig", dir); |
585 |
|
586 |
if (pci_dev->configfd_name && *pci_dev->configfd_name) {
|
587 |
dev->config_fd = monitor_handle_fd_param(cur_mon, pci_dev->configfd_name); |
588 |
if (dev->config_fd < 0) { |
589 |
return 1; |
590 |
} |
591 |
} else {
|
592 |
dev->config_fd = open(name, O_RDWR); |
593 |
|
594 |
if (dev->config_fd == -1) { |
595 |
error_report("%s: %s: %m", __func__, name);
|
596 |
return 1; |
597 |
} |
598 |
} |
599 |
again:
|
600 |
r = read(dev->config_fd, pci_dev->dev.config, |
601 |
pci_config_size(&pci_dev->dev)); |
602 |
if (r < 0) { |
603 |
if (errno == EINTR || errno == EAGAIN) {
|
604 |
goto again;
|
605 |
} |
606 |
error_report("%s: read failed, errno = %d", __func__, errno);
|
607 |
} |
608 |
|
609 |
/* Restore or clear multifunction, this is always controlled by qemu */
|
610 |
if (pci_dev->dev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
611 |
pci_dev->dev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; |
612 |
} else {
|
613 |
pci_dev->dev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION; |
614 |
} |
615 |
|
616 |
/* Clear host resource mapping info. If we choose not to register a
|
617 |
* BAR, such as might be the case with the option ROM, we can get
|
618 |
* confusing, unwritable, residual addresses from the host here. */
|
619 |
memset(&pci_dev->dev.config[PCI_BASE_ADDRESS_0], 0, 24); |
620 |
memset(&pci_dev->dev.config[PCI_ROM_ADDRESS], 0, 4); |
621 |
|
622 |
snprintf(name, sizeof(name), "%sresource", dir); |
623 |
|
624 |
f = fopen(name, "r");
|
625 |
if (f == NULL) { |
626 |
error_report("%s: %s: %m", __func__, name);
|
627 |
return 1; |
628 |
} |
629 |
|
630 |
for (r = 0; r < PCI_ROM_SLOT; r++) { |
631 |
if (fscanf(f, "%" SCNi64 " %" SCNi64 " %" SCNi64 "\n", |
632 |
&start, &end, &flags) != 3) {
|
633 |
break;
|
634 |
} |
635 |
|
636 |
rp = dev->regions + r; |
637 |
rp->valid = 0;
|
638 |
rp->resource_fd = -1;
|
639 |
size = end - start + 1;
|
640 |
flags &= IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH |
641 |
| IORESOURCE_MEM_64; |
642 |
if (size == 0 || (flags & ~IORESOURCE_PREFETCH) == 0) { |
643 |
continue;
|
644 |
} |
645 |
if (flags & IORESOURCE_MEM) {
|
646 |
flags &= ~IORESOURCE_IO; |
647 |
} else {
|
648 |
flags &= ~IORESOURCE_PREFETCH; |
649 |
} |
650 |
snprintf(name, sizeof(name), "%sresource%d", dir, r); |
651 |
fd = open(name, O_RDWR); |
652 |
if (fd == -1) { |
653 |
continue;
|
654 |
} |
655 |
rp->resource_fd = fd; |
656 |
|
657 |
rp->type = flags; |
658 |
rp->valid = 1;
|
659 |
rp->base_addr = start; |
660 |
rp->size = size; |
661 |
pci_dev->v_addrs[r].region = rp; |
662 |
DEBUG("region %d size %" PRIu64 " start 0x%" PRIx64 |
663 |
" type %d resource_fd %d\n",
|
664 |
r, rp->size, start, rp->type, rp->resource_fd); |
665 |
} |
666 |
|
667 |
fclose(f); |
668 |
|
669 |
/* read and fill vendor ID */
|
670 |
v = get_real_vendor_id(dir, &id); |
671 |
if (v) {
|
672 |
return 1; |
673 |
} |
674 |
pci_dev->dev.config[0] = id & 0xff; |
675 |
pci_dev->dev.config[1] = (id & 0xff00) >> 8; |
676 |
|
677 |
/* read and fill device ID */
|
678 |
v = get_real_device_id(dir, &id); |
679 |
if (v) {
|
680 |
return 1; |
681 |
} |
682 |
pci_dev->dev.config[2] = id & 0xff; |
683 |
pci_dev->dev.config[3] = (id & 0xff00) >> 8; |
684 |
|
685 |
pci_word_test_and_clear_mask(pci_dev->emulate_config_write + PCI_COMMAND, |
686 |
PCI_COMMAND_MASTER | PCI_COMMAND_INTX_DISABLE); |
687 |
|
688 |
dev->region_number = r; |
689 |
return 0; |
690 |
} |
691 |
|
692 |
static void free_msi_virqs(AssignedDevice *dev) |
693 |
{ |
694 |
int i;
|
695 |
|
696 |
for (i = 0; i < dev->msi_virq_nr; i++) { |
697 |
if (dev->msi_virq[i] >= 0) { |
698 |
kvm_irqchip_release_virq(kvm_state, dev->msi_virq[i]); |
699 |
dev->msi_virq[i] = -1;
|
700 |
} |
701 |
} |
702 |
g_free(dev->msi_virq); |
703 |
dev->msi_virq = NULL;
|
704 |
dev->msi_virq_nr = 0;
|
705 |
} |
706 |
|
707 |
static void free_assigned_device(AssignedDevice *dev) |
708 |
{ |
709 |
int i;
|
710 |
|
711 |
if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
|
712 |
assigned_dev_unregister_msix_mmio(dev); |
713 |
} |
714 |
for (i = 0; i < dev->real_device.region_number; i++) { |
715 |
PCIRegion *pci_region = &dev->real_device.regions[i]; |
716 |
AssignedDevRegion *region = &dev->v_addrs[i]; |
717 |
|
718 |
if (!pci_region->valid) {
|
719 |
continue;
|
720 |
} |
721 |
if (pci_region->type & IORESOURCE_IO) {
|
722 |
if (region->u.r_baseport) {
|
723 |
memory_region_del_subregion(®ion->container, |
724 |
®ion->real_iomem); |
725 |
memory_region_destroy(®ion->real_iomem); |
726 |
memory_region_destroy(®ion->container); |
727 |
} |
728 |
} else if (pci_region->type & IORESOURCE_MEM) { |
729 |
if (region->u.r_virtbase) {
|
730 |
memory_region_del_subregion(®ion->container, |
731 |
®ion->real_iomem); |
732 |
|
733 |
/* Remove MSI-X table subregion */
|
734 |
if (pci_region->base_addr <= dev->msix_table_addr &&
|
735 |
pci_region->base_addr + pci_region->size > |
736 |
dev->msix_table_addr) { |
737 |
memory_region_del_subregion(®ion->container, |
738 |
&dev->mmio); |
739 |
} |
740 |
|
741 |
memory_region_destroy(®ion->real_iomem); |
742 |
memory_region_destroy(®ion->container); |
743 |
if (munmap(region->u.r_virtbase,
|
744 |
(pci_region->size + 0xFFF) & 0xFFFFF000)) { |
745 |
error_report("Failed to unmap assigned device region: %s",
|
746 |
strerror(errno)); |
747 |
} |
748 |
} |
749 |
} |
750 |
if (pci_region->resource_fd >= 0) { |
751 |
close(pci_region->resource_fd); |
752 |
} |
753 |
} |
754 |
|
755 |
if (dev->real_device.config_fd >= 0) { |
756 |
close(dev->real_device.config_fd); |
757 |
} |
758 |
|
759 |
free_msi_virqs(dev); |
760 |
} |
761 |
|
762 |
static void assign_failed_examine(AssignedDevice *dev) |
763 |
{ |
764 |
char name[PATH_MAX], dir[PATH_MAX], driver[PATH_MAX] = {}, *ns;
|
765 |
uint16_t vendor_id, device_id; |
766 |
int r;
|
767 |
|
768 |
snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/", |
769 |
dev->host.domain, dev->host.bus, dev->host.slot, |
770 |
dev->host.function); |
771 |
|
772 |
snprintf(name, sizeof(name), "%sdriver", dir); |
773 |
|
774 |
r = readlink(name, driver, sizeof(driver));
|
775 |
if ((r <= 0) || r >= sizeof(driver)) { |
776 |
goto fail;
|
777 |
} |
778 |
|
779 |
ns = strrchr(driver, '/');
|
780 |
if (!ns) {
|
781 |
goto fail;
|
782 |
} |
783 |
|
784 |
ns++; |
785 |
|
786 |
if (get_real_vendor_id(dir, &vendor_id) ||
|
787 |
get_real_device_id(dir, &device_id)) { |
788 |
goto fail;
|
789 |
} |
790 |
|
791 |
error_report("*** The driver '%s' is occupying your device "
|
792 |
"%04x:%02x:%02x.%x.",
|
793 |
ns, dev->host.domain, dev->host.bus, dev->host.slot, |
794 |
dev->host.function); |
795 |
error_report("***");
|
796 |
error_report("*** You can try the following commands to free it:");
|
797 |
error_report("***");
|
798 |
error_report("*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/"
|
799 |
"new_id", vendor_id, device_id);
|
800 |
error_report("*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/"
|
801 |
"%s/unbind",
|
802 |
dev->host.domain, dev->host.bus, dev->host.slot, |
803 |
dev->host.function, ns); |
804 |
error_report("*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/"
|
805 |
"pci-stub/bind",
|
806 |
dev->host.domain, dev->host.bus, dev->host.slot, |
807 |
dev->host.function); |
808 |
error_report("*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub"
|
809 |
"/remove_id", vendor_id, device_id);
|
810 |
error_report("***");
|
811 |
|
812 |
return;
|
813 |
|
814 |
fail:
|
815 |
error_report("Couldn't find out why.");
|
816 |
} |
817 |
|
818 |
static int assign_device(AssignedDevice *dev) |
819 |
{ |
820 |
uint32_t flags = KVM_DEV_ASSIGN_ENABLE_IOMMU; |
821 |
int r;
|
822 |
|
823 |
/* Only pass non-zero PCI segment to capable module */
|
824 |
if (!kvm_check_extension(kvm_state, KVM_CAP_PCI_SEGMENT) &&
|
825 |
dev->host.domain) { |
826 |
error_report("Can't assign device inside non-zero PCI segment "
|
827 |
"as this KVM module doesn't support it.");
|
828 |
return -ENODEV;
|
829 |
} |
830 |
|
831 |
if (!kvm_check_extension(kvm_state, KVM_CAP_IOMMU)) {
|
832 |
error_report("No IOMMU found. Unable to assign device \"%s\"",
|
833 |
dev->dev.qdev.id); |
834 |
return -ENODEV;
|
835 |
} |
836 |
|
837 |
if (dev->features & ASSIGNED_DEVICE_SHARE_INTX_MASK &&
|
838 |
kvm_has_intx_set_mask()) { |
839 |
flags |= KVM_DEV_ASSIGN_PCI_2_3; |
840 |
} |
841 |
|
842 |
r = kvm_device_pci_assign(kvm_state, &dev->host, flags, &dev->dev_id); |
843 |
if (r < 0) { |
844 |
error_report("Failed to assign device \"%s\" : %s",
|
845 |
dev->dev.qdev.id, strerror(-r)); |
846 |
|
847 |
switch (r) {
|
848 |
case -EBUSY:
|
849 |
assign_failed_examine(dev); |
850 |
break;
|
851 |
default:
|
852 |
break;
|
853 |
} |
854 |
} |
855 |
return r;
|
856 |
} |
857 |
|
858 |
static bool check_irqchip_in_kernel(void) |
859 |
{ |
860 |
if (kvm_irqchip_in_kernel()) {
|
861 |
return true; |
862 |
} |
863 |
error_report("pci-assign: error: requires KVM with in-kernel irqchip "
|
864 |
"enabled");
|
865 |
return false; |
866 |
} |
867 |
|
868 |
static int assign_intx(AssignedDevice *dev) |
869 |
{ |
870 |
AssignedIRQType new_type; |
871 |
PCIINTxRoute intx_route; |
872 |
bool intx_host_msi;
|
873 |
int r;
|
874 |
|
875 |
/* Interrupt PIN 0 means don't use INTx */
|
876 |
if (assigned_dev_pci_read_byte(&dev->dev, PCI_INTERRUPT_PIN) == 0) { |
877 |
pci_device_set_intx_routing_notifier(&dev->dev, NULL);
|
878 |
return 0; |
879 |
} |
880 |
|
881 |
if (!check_irqchip_in_kernel()) {
|
882 |
return -ENOTSUP;
|
883 |
} |
884 |
|
885 |
pci_device_set_intx_routing_notifier(&dev->dev, |
886 |
assigned_dev_update_irq_routing); |
887 |
|
888 |
intx_route = pci_device_route_intx_to_irq(&dev->dev, dev->intpin); |
889 |
assert(intx_route.mode != PCI_INTX_INVERTED); |
890 |
|
891 |
if (!pci_intx_route_changed(&dev->intx_route, &intx_route)) {
|
892 |
return 0; |
893 |
} |
894 |
|
895 |
switch (dev->assigned_irq_type) {
|
896 |
case ASSIGNED_IRQ_INTX_HOST_INTX:
|
897 |
case ASSIGNED_IRQ_INTX_HOST_MSI:
|
898 |
intx_host_msi = dev->assigned_irq_type == ASSIGNED_IRQ_INTX_HOST_MSI; |
899 |
r = kvm_device_intx_deassign(kvm_state, dev->dev_id, intx_host_msi); |
900 |
break;
|
901 |
case ASSIGNED_IRQ_MSI:
|
902 |
r = kvm_device_msi_deassign(kvm_state, dev->dev_id); |
903 |
break;
|
904 |
case ASSIGNED_IRQ_MSIX:
|
905 |
r = kvm_device_msix_deassign(kvm_state, dev->dev_id); |
906 |
break;
|
907 |
default:
|
908 |
r = 0;
|
909 |
break;
|
910 |
} |
911 |
if (r) {
|
912 |
perror("assign_intx: deassignment of previous interrupt failed");
|
913 |
} |
914 |
dev->assigned_irq_type = ASSIGNED_IRQ_NONE; |
915 |
|
916 |
if (intx_route.mode == PCI_INTX_DISABLED) {
|
917 |
dev->intx_route = intx_route; |
918 |
return 0; |
919 |
} |
920 |
|
921 |
retry:
|
922 |
if (dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK &&
|
923 |
dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) { |
924 |
intx_host_msi = true;
|
925 |
new_type = ASSIGNED_IRQ_INTX_HOST_MSI; |
926 |
} else {
|
927 |
intx_host_msi = false;
|
928 |
new_type = ASSIGNED_IRQ_INTX_HOST_INTX; |
929 |
} |
930 |
|
931 |
r = kvm_device_intx_assign(kvm_state, dev->dev_id, intx_host_msi, |
932 |
intx_route.irq); |
933 |
if (r < 0) { |
934 |
if (r == -EIO && !(dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK) &&
|
935 |
dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) { |
936 |
/* Retry with host-side MSI. There might be an IRQ conflict and
|
937 |
* either the kernel or the device doesn't support sharing. */
|
938 |
error_report("Host-side INTx sharing not supported, "
|
939 |
"using MSI instead");
|
940 |
error_printf("Some devices do not work properly in this mode.\n");
|
941 |
dev->features |= ASSIGNED_DEVICE_PREFER_MSI_MASK; |
942 |
goto retry;
|
943 |
} |
944 |
error_report("Failed to assign irq for \"%s\": %s",
|
945 |
dev->dev.qdev.id, strerror(-r)); |
946 |
error_report("Perhaps you are assigning a device "
|
947 |
"that shares an IRQ with another device?");
|
948 |
return r;
|
949 |
} |
950 |
|
951 |
dev->intx_route = intx_route; |
952 |
dev->assigned_irq_type = new_type; |
953 |
return r;
|
954 |
} |
955 |
|
956 |
static void deassign_device(AssignedDevice *dev) |
957 |
{ |
958 |
int r;
|
959 |
|
960 |
r = kvm_device_pci_deassign(kvm_state, dev->dev_id); |
961 |
assert(r == 0);
|
962 |
} |
963 |
|
964 |
/* The pci config space got updated. Check if irq numbers have changed
|
965 |
* for our devices
|
966 |
*/
|
967 |
static void assigned_dev_update_irq_routing(PCIDevice *dev) |
968 |
{ |
969 |
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, dev); |
970 |
Error *err = NULL;
|
971 |
int r;
|
972 |
|
973 |
r = assign_intx(assigned_dev); |
974 |
if (r < 0) { |
975 |
qdev_unplug(&dev->qdev, &err); |
976 |
assert(!err); |
977 |
} |
978 |
} |
979 |
|
980 |
static void assigned_dev_update_msi(PCIDevice *pci_dev) |
981 |
{ |
982 |
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
983 |
uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap + |
984 |
PCI_MSI_FLAGS); |
985 |
int r;
|
986 |
|
987 |
/* Some guests gratuitously disable MSI even if they're not using it,
|
988 |
* try to catch this by only deassigning irqs if the guest is using
|
989 |
* MSI or intends to start. */
|
990 |
if (assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSI ||
|
991 |
(ctrl_byte & PCI_MSI_FLAGS_ENABLE)) { |
992 |
r = kvm_device_msi_deassign(kvm_state, assigned_dev->dev_id); |
993 |
/* -ENXIO means no assigned irq */
|
994 |
if (r && r != -ENXIO) {
|
995 |
perror("assigned_dev_update_msi: deassign irq");
|
996 |
} |
997 |
|
998 |
free_msi_virqs(assigned_dev); |
999 |
|
1000 |
assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE; |
1001 |
pci_device_set_intx_routing_notifier(pci_dev, NULL);
|
1002 |
} |
1003 |
|
1004 |
if (ctrl_byte & PCI_MSI_FLAGS_ENABLE) {
|
1005 |
MSIMessage msg = msi_get_message(pci_dev, 0);
|
1006 |
int virq;
|
1007 |
|
1008 |
virq = kvm_irqchip_add_msi_route(kvm_state, msg); |
1009 |
if (virq < 0) { |
1010 |
perror("assigned_dev_update_msi: kvm_irqchip_add_msi_route");
|
1011 |
return;
|
1012 |
} |
1013 |
|
1014 |
assigned_dev->msi_virq = g_malloc(sizeof(*assigned_dev->msi_virq));
|
1015 |
assigned_dev->msi_virq_nr = 1;
|
1016 |
assigned_dev->msi_virq[0] = virq;
|
1017 |
if (kvm_device_msi_assign(kvm_state, assigned_dev->dev_id, virq) < 0) { |
1018 |
perror("assigned_dev_update_msi: kvm_device_msi_assign");
|
1019 |
} |
1020 |
|
1021 |
assigned_dev->intx_route.mode = PCI_INTX_DISABLED; |
1022 |
assigned_dev->intx_route.irq = -1;
|
1023 |
assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSI; |
1024 |
} else {
|
1025 |
assign_intx(assigned_dev); |
1026 |
} |
1027 |
} |
1028 |
|
1029 |
static bool assigned_dev_msix_masked(MSIXTableEntry *entry) |
1030 |
{ |
1031 |
return (entry->ctrl & cpu_to_le32(0x1)) != 0; |
1032 |
} |
1033 |
|
1034 |
/*
|
1035 |
* When MSI-X is first enabled the vector table typically has all the
|
1036 |
* vectors masked, so we can't use that as the obvious test to figure out
|
1037 |
* how many vectors to initially enable. Instead we look at the data field
|
1038 |
* because this is what worked for pci-assign for a long time. This makes
|
1039 |
* sure the physical MSI-X state tracks the guest's view, which is important
|
1040 |
* for some VF/PF and PF/fw communication channels.
|
1041 |
*/
|
1042 |
static bool assigned_dev_msix_skipped(MSIXTableEntry *entry) |
1043 |
{ |
1044 |
return !entry->data;
|
1045 |
} |
1046 |
|
1047 |
static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev) |
1048 |
{ |
1049 |
AssignedDevice *adev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1050 |
uint16_t entries_nr = 0;
|
1051 |
int i, r = 0; |
1052 |
MSIXTableEntry *entry = adev->msix_table; |
1053 |
MSIMessage msg; |
1054 |
|
1055 |
/* Get the usable entry number for allocating */
|
1056 |
for (i = 0; i < adev->msix_max; i++, entry++) { |
1057 |
if (assigned_dev_msix_skipped(entry)) {
|
1058 |
continue;
|
1059 |
} |
1060 |
entries_nr++; |
1061 |
} |
1062 |
|
1063 |
DEBUG("MSI-X entries: %d\n", entries_nr);
|
1064 |
|
1065 |
/* It's valid to enable MSI-X with all entries masked */
|
1066 |
if (!entries_nr) {
|
1067 |
return 0; |
1068 |
} |
1069 |
|
1070 |
r = kvm_device_msix_init_vectors(kvm_state, adev->dev_id, entries_nr); |
1071 |
if (r != 0) { |
1072 |
error_report("fail to set MSI-X entry number for MSIX! %s",
|
1073 |
strerror(-r)); |
1074 |
return r;
|
1075 |
} |
1076 |
|
1077 |
free_msi_virqs(adev); |
1078 |
|
1079 |
adev->msi_virq_nr = adev->msix_max; |
1080 |
adev->msi_virq = g_malloc(adev->msix_max * sizeof(*adev->msi_virq));
|
1081 |
|
1082 |
entry = adev->msix_table; |
1083 |
for (i = 0; i < adev->msix_max; i++, entry++) { |
1084 |
adev->msi_virq[i] = -1;
|
1085 |
|
1086 |
if (assigned_dev_msix_skipped(entry)) {
|
1087 |
continue;
|
1088 |
} |
1089 |
|
1090 |
msg.address = entry->addr_lo | ((uint64_t)entry->addr_hi << 32);
|
1091 |
msg.data = entry->data; |
1092 |
r = kvm_irqchip_add_msi_route(kvm_state, msg); |
1093 |
if (r < 0) { |
1094 |
return r;
|
1095 |
} |
1096 |
adev->msi_virq[i] = r; |
1097 |
|
1098 |
DEBUG("MSI-X vector %d, gsi %d, addr %08x_%08x, data %08x\n", i,
|
1099 |
r, entry->addr_hi, entry->addr_lo, entry->data); |
1100 |
|
1101 |
r = kvm_device_msix_set_vector(kvm_state, adev->dev_id, i, |
1102 |
adev->msi_virq[i]); |
1103 |
if (r) {
|
1104 |
error_report("fail to set MSI-X entry! %s", strerror(-r));
|
1105 |
break;
|
1106 |
} |
1107 |
} |
1108 |
|
1109 |
return r;
|
1110 |
} |
1111 |
|
1112 |
static void assigned_dev_update_msix(PCIDevice *pci_dev) |
1113 |
{ |
1114 |
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1115 |
uint16_t ctrl_word = pci_get_word(pci_dev->config + pci_dev->msix_cap + |
1116 |
PCI_MSIX_FLAGS); |
1117 |
int r;
|
1118 |
|
1119 |
/* Some guests gratuitously disable MSIX even if they're not using it,
|
1120 |
* try to catch this by only deassigning irqs if the guest is using
|
1121 |
* MSIX or intends to start. */
|
1122 |
if ((assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSIX) ||
|
1123 |
(ctrl_word & PCI_MSIX_FLAGS_ENABLE)) { |
1124 |
r = kvm_device_msix_deassign(kvm_state, assigned_dev->dev_id); |
1125 |
/* -ENXIO means no assigned irq */
|
1126 |
if (r && r != -ENXIO) {
|
1127 |
perror("assigned_dev_update_msix: deassign irq");
|
1128 |
} |
1129 |
|
1130 |
free_msi_virqs(assigned_dev); |
1131 |
|
1132 |
assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE; |
1133 |
pci_device_set_intx_routing_notifier(pci_dev, NULL);
|
1134 |
} |
1135 |
|
1136 |
if (ctrl_word & PCI_MSIX_FLAGS_ENABLE) {
|
1137 |
if (assigned_dev_update_msix_mmio(pci_dev) < 0) { |
1138 |
perror("assigned_dev_update_msix_mmio");
|
1139 |
return;
|
1140 |
} |
1141 |
|
1142 |
if (assigned_dev->msi_virq_nr > 0) { |
1143 |
if (kvm_device_msix_assign(kvm_state, assigned_dev->dev_id) < 0) { |
1144 |
perror("assigned_dev_enable_msix: assign irq");
|
1145 |
return;
|
1146 |
} |
1147 |
} |
1148 |
assigned_dev->intx_route.mode = PCI_INTX_DISABLED; |
1149 |
assigned_dev->intx_route.irq = -1;
|
1150 |
assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSIX; |
1151 |
} else {
|
1152 |
assign_intx(assigned_dev); |
1153 |
} |
1154 |
} |
1155 |
|
1156 |
static uint32_t assigned_dev_pci_read_config(PCIDevice *pci_dev,
|
1157 |
uint32_t address, int len)
|
1158 |
{ |
1159 |
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1160 |
uint32_t virt_val = pci_default_read_config(pci_dev, address, len); |
1161 |
uint32_t real_val, emulate_mask, full_emulation_mask; |
1162 |
|
1163 |
emulate_mask = 0;
|
1164 |
memcpy(&emulate_mask, assigned_dev->emulate_config_read + address, len); |
1165 |
emulate_mask = le32_to_cpu(emulate_mask); |
1166 |
|
1167 |
full_emulation_mask = 0xffffffff >> (32 - len * 8); |
1168 |
|
1169 |
if (emulate_mask != full_emulation_mask) {
|
1170 |
real_val = assigned_dev_pci_read(pci_dev, address, len); |
1171 |
return (virt_val & emulate_mask) | (real_val & ~emulate_mask);
|
1172 |
} else {
|
1173 |
return virt_val;
|
1174 |
} |
1175 |
} |
1176 |
|
1177 |
static void assigned_dev_pci_write_config(PCIDevice *pci_dev, uint32_t address, |
1178 |
uint32_t val, int len)
|
1179 |
{ |
1180 |
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1181 |
uint16_t old_cmd = pci_get_word(pci_dev->config + PCI_COMMAND); |
1182 |
uint32_t emulate_mask, full_emulation_mask; |
1183 |
int ret;
|
1184 |
|
1185 |
pci_default_write_config(pci_dev, address, val, len); |
1186 |
|
1187 |
if (kvm_has_intx_set_mask() &&
|
1188 |
range_covers_byte(address, len, PCI_COMMAND + 1)) {
|
1189 |
bool intx_masked = (pci_get_word(pci_dev->config + PCI_COMMAND) &
|
1190 |
PCI_COMMAND_INTX_DISABLE); |
1191 |
|
1192 |
if (intx_masked != !!(old_cmd & PCI_COMMAND_INTX_DISABLE)) {
|
1193 |
ret = kvm_device_intx_set_mask(kvm_state, assigned_dev->dev_id, |
1194 |
intx_masked); |
1195 |
if (ret) {
|
1196 |
perror("assigned_dev_pci_write_config: set intx mask");
|
1197 |
} |
1198 |
} |
1199 |
} |
1200 |
if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) {
|
1201 |
if (range_covers_byte(address, len,
|
1202 |
pci_dev->msi_cap + PCI_MSI_FLAGS)) { |
1203 |
assigned_dev_update_msi(pci_dev); |
1204 |
} |
1205 |
} |
1206 |
if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
|
1207 |
if (range_covers_byte(address, len,
|
1208 |
pci_dev->msix_cap + PCI_MSIX_FLAGS + 1)) {
|
1209 |
assigned_dev_update_msix(pci_dev); |
1210 |
} |
1211 |
} |
1212 |
|
1213 |
emulate_mask = 0;
|
1214 |
memcpy(&emulate_mask, assigned_dev->emulate_config_write + address, len); |
1215 |
emulate_mask = le32_to_cpu(emulate_mask); |
1216 |
|
1217 |
full_emulation_mask = 0xffffffff >> (32 - len * 8); |
1218 |
|
1219 |
if (emulate_mask != full_emulation_mask) {
|
1220 |
if (emulate_mask) {
|
1221 |
val &= ~emulate_mask; |
1222 |
val |= assigned_dev_pci_read(pci_dev, address, len) & emulate_mask; |
1223 |
} |
1224 |
assigned_dev_pci_write(pci_dev, address, val, len); |
1225 |
} |
1226 |
} |
1227 |
|
1228 |
static void assigned_dev_setup_cap_read(AssignedDevice *dev, uint32_t offset, |
1229 |
uint32_t len) |
1230 |
{ |
1231 |
assigned_dev_direct_config_read(dev, offset, len); |
1232 |
assigned_dev_emulate_config_read(dev, offset + PCI_CAP_LIST_NEXT, 1);
|
1233 |
} |
1234 |
|
1235 |
static int assigned_device_pci_cap_init(PCIDevice *pci_dev) |
1236 |
{ |
1237 |
AssignedDevice *dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1238 |
PCIRegion *pci_region = dev->real_device.regions; |
1239 |
int ret, pos;
|
1240 |
|
1241 |
/* Clear initial capabilities pointer and status copied from hw */
|
1242 |
pci_set_byte(pci_dev->config + PCI_CAPABILITY_LIST, 0);
|
1243 |
pci_set_word(pci_dev->config + PCI_STATUS, |
1244 |
pci_get_word(pci_dev->config + PCI_STATUS) & |
1245 |
~PCI_STATUS_CAP_LIST); |
1246 |
|
1247 |
/* Expose MSI capability
|
1248 |
* MSI capability is the 1st capability in capability config */
|
1249 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSI, 0);
|
1250 |
if (pos != 0 && kvm_check_extension(kvm_state, KVM_CAP_ASSIGN_DEV_IRQ)) { |
1251 |
if (!check_irqchip_in_kernel()) {
|
1252 |
return -ENOTSUP;
|
1253 |
} |
1254 |
dev->cap.available |= ASSIGNED_DEVICE_CAP_MSI; |
1255 |
/* Only 32-bit/no-mask currently supported */
|
1256 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSI, pos, 10);
|
1257 |
if (ret < 0) { |
1258 |
return ret;
|
1259 |
} |
1260 |
pci_dev->msi_cap = pos; |
1261 |
|
1262 |
pci_set_word(pci_dev->config + pos + PCI_MSI_FLAGS, |
1263 |
pci_get_word(pci_dev->config + pos + PCI_MSI_FLAGS) & |
1264 |
PCI_MSI_FLAGS_QMASK); |
1265 |
pci_set_long(pci_dev->config + pos + PCI_MSI_ADDRESS_LO, 0);
|
1266 |
pci_set_word(pci_dev->config + pos + PCI_MSI_DATA_32, 0);
|
1267 |
|
1268 |
/* Set writable fields */
|
1269 |
pci_set_word(pci_dev->wmask + pos + PCI_MSI_FLAGS, |
1270 |
PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE); |
1271 |
pci_set_long(pci_dev->wmask + pos + PCI_MSI_ADDRESS_LO, 0xfffffffc);
|
1272 |
pci_set_word(pci_dev->wmask + pos + PCI_MSI_DATA_32, 0xffff);
|
1273 |
} |
1274 |
/* Expose MSI-X capability */
|
1275 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSIX, 0);
|
1276 |
if (pos != 0 && kvm_device_msix_supported(kvm_state)) { |
1277 |
int bar_nr;
|
1278 |
uint32_t msix_table_entry; |
1279 |
|
1280 |
if (!check_irqchip_in_kernel()) {
|
1281 |
return -ENOTSUP;
|
1282 |
} |
1283 |
dev->cap.available |= ASSIGNED_DEVICE_CAP_MSIX; |
1284 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSIX, pos, 12);
|
1285 |
if (ret < 0) { |
1286 |
return ret;
|
1287 |
} |
1288 |
pci_dev->msix_cap = pos; |
1289 |
|
1290 |
pci_set_word(pci_dev->config + pos + PCI_MSIX_FLAGS, |
1291 |
pci_get_word(pci_dev->config + pos + PCI_MSIX_FLAGS) & |
1292 |
PCI_MSIX_FLAGS_QSIZE); |
1293 |
|
1294 |
/* Only enable and function mask bits are writable */
|
1295 |
pci_set_word(pci_dev->wmask + pos + PCI_MSIX_FLAGS, |
1296 |
PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL); |
1297 |
|
1298 |
msix_table_entry = pci_get_long(pci_dev->config + pos + PCI_MSIX_TABLE); |
1299 |
bar_nr = msix_table_entry & PCI_MSIX_FLAGS_BIRMASK; |
1300 |
msix_table_entry &= ~PCI_MSIX_FLAGS_BIRMASK; |
1301 |
dev->msix_table_addr = pci_region[bar_nr].base_addr + msix_table_entry; |
1302 |
dev->msix_max = pci_get_word(pci_dev->config + pos + PCI_MSIX_FLAGS); |
1303 |
dev->msix_max &= PCI_MSIX_FLAGS_QSIZE; |
1304 |
dev->msix_max += 1;
|
1305 |
} |
1306 |
|
1307 |
/* Minimal PM support, nothing writable, device appears to NAK changes */
|
1308 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PM, 0);
|
1309 |
if (pos) {
|
1310 |
uint16_t pmc; |
1311 |
|
1312 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_PM, pos, PCI_PM_SIZEOF); |
1313 |
if (ret < 0) { |
1314 |
return ret;
|
1315 |
} |
1316 |
|
1317 |
assigned_dev_setup_cap_read(dev, pos, PCI_PM_SIZEOF); |
1318 |
|
1319 |
pmc = pci_get_word(pci_dev->config + pos + PCI_CAP_FLAGS); |
1320 |
pmc &= (PCI_PM_CAP_VER_MASK | PCI_PM_CAP_DSI); |
1321 |
pci_set_word(pci_dev->config + pos + PCI_CAP_FLAGS, pmc); |
1322 |
|
1323 |
/* assign_device will bring the device up to D0, so we don't need
|
1324 |
* to worry about doing that ourselves here. */
|
1325 |
pci_set_word(pci_dev->config + pos + PCI_PM_CTRL, |
1326 |
PCI_PM_CTRL_NO_SOFT_RESET); |
1327 |
|
1328 |
pci_set_byte(pci_dev->config + pos + PCI_PM_PPB_EXTENSIONS, 0);
|
1329 |
pci_set_byte(pci_dev->config + pos + PCI_PM_DATA_REGISTER, 0);
|
1330 |
} |
1331 |
|
1332 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_EXP, 0);
|
1333 |
if (pos) {
|
1334 |
uint8_t version, size = 0;
|
1335 |
uint16_t type, devctl, lnksta; |
1336 |
uint32_t devcap, lnkcap; |
1337 |
|
1338 |
version = pci_get_byte(pci_dev->config + pos + PCI_EXP_FLAGS); |
1339 |
version &= PCI_EXP_FLAGS_VERS; |
1340 |
if (version == 1) { |
1341 |
size = 0x14;
|
1342 |
} else if (version == 2) { |
1343 |
/*
|
1344 |
* Check for non-std size, accept reduced size to 0x34,
|
1345 |
* which is what bcm5761 implemented, violating the
|
1346 |
* PCIe v3.0 spec that regs should exist and be read as 0,
|
1347 |
* not optionally provided and shorten the struct size.
|
1348 |
*/
|
1349 |
size = MIN(0x3c, PCI_CONFIG_SPACE_SIZE - pos);
|
1350 |
if (size < 0x34) { |
1351 |
error_report("%s: Invalid size PCIe cap-id 0x%x",
|
1352 |
__func__, PCI_CAP_ID_EXP); |
1353 |
return -EINVAL;
|
1354 |
} else if (size != 0x3c) { |
1355 |
error_report("WARNING, %s: PCIe cap-id 0x%x has "
|
1356 |
"non-standard size 0x%x; std size should be 0x3c",
|
1357 |
__func__, PCI_CAP_ID_EXP, size); |
1358 |
} |
1359 |
} else if (version == 0) { |
1360 |
uint16_t vid, did; |
1361 |
vid = pci_get_word(pci_dev->config + PCI_VENDOR_ID); |
1362 |
did = pci_get_word(pci_dev->config + PCI_DEVICE_ID); |
1363 |
if (vid == PCI_VENDOR_ID_INTEL && did == 0x10ed) { |
1364 |
/*
|
1365 |
* quirk for Intel 82599 VF with invalid PCIe capability
|
1366 |
* version, should really be version 2 (same as PF)
|
1367 |
*/
|
1368 |
size = 0x3c;
|
1369 |
} |
1370 |
} |
1371 |
|
1372 |
if (size == 0) { |
1373 |
error_report("%s: Unsupported PCI express capability version %d",
|
1374 |
__func__, version); |
1375 |
return -EINVAL;
|
1376 |
} |
1377 |
|
1378 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_EXP, pos, size); |
1379 |
if (ret < 0) { |
1380 |
return ret;
|
1381 |
} |
1382 |
|
1383 |
assigned_dev_setup_cap_read(dev, pos, size); |
1384 |
|
1385 |
type = pci_get_word(pci_dev->config + pos + PCI_EXP_FLAGS); |
1386 |
type = (type & PCI_EXP_FLAGS_TYPE) >> 4;
|
1387 |
if (type != PCI_EXP_TYPE_ENDPOINT &&
|
1388 |
type != PCI_EXP_TYPE_LEG_END && type != PCI_EXP_TYPE_RC_END) { |
1389 |
error_report("Device assignment only supports endpoint assignment,"
|
1390 |
" device type %d", type);
|
1391 |
return -EINVAL;
|
1392 |
} |
1393 |
|
1394 |
/* capabilities, pass existing read-only copy
|
1395 |
* PCI_EXP_FLAGS_IRQ: updated by hardware, should be direct read */
|
1396 |
|
1397 |
/* device capabilities: hide FLR */
|
1398 |
devcap = pci_get_long(pci_dev->config + pos + PCI_EXP_DEVCAP); |
1399 |
devcap &= ~PCI_EXP_DEVCAP_FLR; |
1400 |
pci_set_long(pci_dev->config + pos + PCI_EXP_DEVCAP, devcap); |
1401 |
|
1402 |
/* device control: clear all error reporting enable bits, leaving
|
1403 |
* only a few host values. Note, these are
|
1404 |
* all writable, but not passed to hw.
|
1405 |
*/
|
1406 |
devctl = pci_get_word(pci_dev->config + pos + PCI_EXP_DEVCTL); |
1407 |
devctl = (devctl & (PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_PAYLOAD)) | |
1408 |
PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN; |
1409 |
pci_set_word(pci_dev->config + pos + PCI_EXP_DEVCTL, devctl); |
1410 |
devctl = PCI_EXP_DEVCTL_BCR_FLR | PCI_EXP_DEVCTL_AUX_PME; |
1411 |
pci_set_word(pci_dev->wmask + pos + PCI_EXP_DEVCTL, ~devctl); |
1412 |
|
1413 |
/* Clear device status */
|
1414 |
pci_set_word(pci_dev->config + pos + PCI_EXP_DEVSTA, 0);
|
1415 |
|
1416 |
/* Link capabilities, expose links and latencues, clear reporting */
|
1417 |
lnkcap = pci_get_long(pci_dev->config + pos + PCI_EXP_LNKCAP); |
1418 |
lnkcap &= (PCI_EXP_LNKCAP_SLS | PCI_EXP_LNKCAP_MLW | |
1419 |
PCI_EXP_LNKCAP_ASPMS | PCI_EXP_LNKCAP_L0SEL | |
1420 |
PCI_EXP_LNKCAP_L1EL); |
1421 |
pci_set_long(pci_dev->config + pos + PCI_EXP_LNKCAP, lnkcap); |
1422 |
|
1423 |
/* Link control, pass existing read-only copy. Should be writable? */
|
1424 |
|
1425 |
/* Link status, only expose current speed and width */
|
1426 |
lnksta = pci_get_word(pci_dev->config + pos + PCI_EXP_LNKSTA); |
1427 |
lnksta &= (PCI_EXP_LNKSTA_CLS | PCI_EXP_LNKSTA_NLW); |
1428 |
pci_set_word(pci_dev->config + pos + PCI_EXP_LNKSTA, lnksta); |
1429 |
|
1430 |
if (version >= 2) { |
1431 |
/* Slot capabilities, control, status - not needed for endpoints */
|
1432 |
pci_set_long(pci_dev->config + pos + PCI_EXP_SLTCAP, 0);
|
1433 |
pci_set_word(pci_dev->config + pos + PCI_EXP_SLTCTL, 0);
|
1434 |
pci_set_word(pci_dev->config + pos + PCI_EXP_SLTSTA, 0);
|
1435 |
|
1436 |
/* Root control, capabilities, status - not needed for endpoints */
|
1437 |
pci_set_word(pci_dev->config + pos + PCI_EXP_RTCTL, 0);
|
1438 |
pci_set_word(pci_dev->config + pos + PCI_EXP_RTCAP, 0);
|
1439 |
pci_set_long(pci_dev->config + pos + PCI_EXP_RTSTA, 0);
|
1440 |
|
1441 |
/* Device capabilities/control 2, pass existing read-only copy */
|
1442 |
/* Link control 2, pass existing read-only copy */
|
1443 |
} |
1444 |
} |
1445 |
|
1446 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PCIX, 0);
|
1447 |
if (pos) {
|
1448 |
uint16_t cmd; |
1449 |
uint32_t status; |
1450 |
|
1451 |
/* Only expose the minimum, 8 byte capability */
|
1452 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_PCIX, pos, 8);
|
1453 |
if (ret < 0) { |
1454 |
return ret;
|
1455 |
} |
1456 |
|
1457 |
assigned_dev_setup_cap_read(dev, pos, 8);
|
1458 |
|
1459 |
/* Command register, clear upper bits, including extended modes */
|
1460 |
cmd = pci_get_word(pci_dev->config + pos + PCI_X_CMD); |
1461 |
cmd &= (PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO | PCI_X_CMD_MAX_READ | |
1462 |
PCI_X_CMD_MAX_SPLIT); |
1463 |
pci_set_word(pci_dev->config + pos + PCI_X_CMD, cmd); |
1464 |
|
1465 |
/* Status register, update with emulated PCI bus location, clear
|
1466 |
* error bits, leave the rest. */
|
1467 |
status = pci_get_long(pci_dev->config + pos + PCI_X_STATUS); |
1468 |
status &= ~(PCI_X_STATUS_BUS | PCI_X_STATUS_DEVFN); |
1469 |
status |= (pci_bus_num(pci_dev->bus) << 8) | pci_dev->devfn;
|
1470 |
status &= ~(PCI_X_STATUS_SPL_DISC | PCI_X_STATUS_UNX_SPL | |
1471 |
PCI_X_STATUS_SPL_ERR); |
1472 |
pci_set_long(pci_dev->config + pos + PCI_X_STATUS, status); |
1473 |
} |
1474 |
|
1475 |
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VPD, 0);
|
1476 |
if (pos) {
|
1477 |
/* Direct R/W passthrough */
|
1478 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_VPD, pos, 8);
|
1479 |
if (ret < 0) { |
1480 |
return ret;
|
1481 |
} |
1482 |
|
1483 |
assigned_dev_setup_cap_read(dev, pos, 8);
|
1484 |
|
1485 |
/* direct write for cap content */
|
1486 |
assigned_dev_direct_config_write(dev, pos + 2, 6); |
1487 |
} |
1488 |
|
1489 |
/* Devices can have multiple vendor capabilities, get them all */
|
1490 |
for (pos = 0; (pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VNDR, pos)); |
1491 |
pos += PCI_CAP_LIST_NEXT) { |
1492 |
uint8_t len = pci_get_byte(pci_dev->config + pos + PCI_CAP_FLAGS); |
1493 |
/* Direct R/W passthrough */
|
1494 |
ret = pci_add_capability(pci_dev, PCI_CAP_ID_VNDR, pos, len); |
1495 |
if (ret < 0) { |
1496 |
return ret;
|
1497 |
} |
1498 |
|
1499 |
assigned_dev_setup_cap_read(dev, pos, len); |
1500 |
|
1501 |
/* direct write for cap content */
|
1502 |
assigned_dev_direct_config_write(dev, pos + 2, len - 2); |
1503 |
} |
1504 |
|
1505 |
/* If real and virtual capability list status bits differ, virtualize the
|
1506 |
* access. */
|
1507 |
if ((pci_get_word(pci_dev->config + PCI_STATUS) & PCI_STATUS_CAP_LIST) !=
|
1508 |
(assigned_dev_pci_read_byte(pci_dev, PCI_STATUS) & |
1509 |
PCI_STATUS_CAP_LIST)) { |
1510 |
dev->emulate_config_read[PCI_STATUS] |= PCI_STATUS_CAP_LIST; |
1511 |
} |
1512 |
|
1513 |
return 0; |
1514 |
} |
1515 |
|
1516 |
static uint64_t
|
1517 |
assigned_dev_msix_mmio_read(void *opaque, hwaddr addr,
|
1518 |
unsigned size)
|
1519 |
{ |
1520 |
AssignedDevice *adev = opaque; |
1521 |
uint64_t val; |
1522 |
|
1523 |
memcpy(&val, (void *)((uint8_t *)adev->msix_table + addr), size);
|
1524 |
|
1525 |
return val;
|
1526 |
} |
1527 |
|
1528 |
static void assigned_dev_msix_mmio_write(void *opaque, hwaddr addr, |
1529 |
uint64_t val, unsigned size)
|
1530 |
{ |
1531 |
AssignedDevice *adev = opaque; |
1532 |
PCIDevice *pdev = &adev->dev; |
1533 |
uint16_t ctrl; |
1534 |
MSIXTableEntry orig; |
1535 |
int i = addr >> 4; |
1536 |
|
1537 |
if (i >= adev->msix_max) {
|
1538 |
return; /* Drop write */ |
1539 |
} |
1540 |
|
1541 |
ctrl = pci_get_word(pdev->config + pdev->msix_cap + PCI_MSIX_FLAGS); |
1542 |
|
1543 |
DEBUG("write to MSI-X table offset 0x%lx, val 0x%lx\n", addr, val);
|
1544 |
|
1545 |
if (ctrl & PCI_MSIX_FLAGS_ENABLE) {
|
1546 |
orig = adev->msix_table[i]; |
1547 |
} |
1548 |
|
1549 |
memcpy((uint8_t *)adev->msix_table + addr, &val, size); |
1550 |
|
1551 |
if (ctrl & PCI_MSIX_FLAGS_ENABLE) {
|
1552 |
MSIXTableEntry *entry = &adev->msix_table[i]; |
1553 |
|
1554 |
if (!assigned_dev_msix_masked(&orig) &&
|
1555 |
assigned_dev_msix_masked(entry)) { |
1556 |
/*
|
1557 |
* Vector masked, disable it
|
1558 |
*
|
1559 |
* XXX It's not clear if we can or should actually attempt
|
1560 |
* to mask or disable the interrupt. KVM doesn't have
|
1561 |
* support for pending bits and kvm_assign_set_msix_entry
|
1562 |
* doesn't modify the device hardware mask. Interrupts
|
1563 |
* while masked are simply not injected to the guest, so
|
1564 |
* are lost. Can we get away with always injecting an
|
1565 |
* interrupt on unmask?
|
1566 |
*/
|
1567 |
} else if (assigned_dev_msix_masked(&orig) && |
1568 |
!assigned_dev_msix_masked(entry)) { |
1569 |
/* Vector unmasked */
|
1570 |
if (i >= adev->msi_virq_nr || adev->msi_virq[i] < 0) { |
1571 |
/* Previously unassigned vector, start from scratch */
|
1572 |
assigned_dev_update_msix(pdev); |
1573 |
return;
|
1574 |
} else {
|
1575 |
/* Update an existing, previously masked vector */
|
1576 |
MSIMessage msg; |
1577 |
int ret;
|
1578 |
|
1579 |
msg.address = entry->addr_lo | |
1580 |
((uint64_t)entry->addr_hi << 32);
|
1581 |
msg.data = entry->data; |
1582 |
|
1583 |
ret = kvm_irqchip_update_msi_route(kvm_state, |
1584 |
adev->msi_virq[i], msg); |
1585 |
if (ret) {
|
1586 |
error_report("Error updating irq routing entry (%d)", ret);
|
1587 |
} |
1588 |
} |
1589 |
} |
1590 |
} |
1591 |
} |
1592 |
|
1593 |
static const MemoryRegionOps assigned_dev_msix_mmio_ops = { |
1594 |
.read = assigned_dev_msix_mmio_read, |
1595 |
.write = assigned_dev_msix_mmio_write, |
1596 |
.endianness = DEVICE_NATIVE_ENDIAN, |
1597 |
.valid = { |
1598 |
.min_access_size = 4,
|
1599 |
.max_access_size = 8,
|
1600 |
}, |
1601 |
.impl = { |
1602 |
.min_access_size = 4,
|
1603 |
.max_access_size = 8,
|
1604 |
}, |
1605 |
}; |
1606 |
|
1607 |
static void assigned_dev_msix_reset(AssignedDevice *dev) |
1608 |
{ |
1609 |
MSIXTableEntry *entry; |
1610 |
int i;
|
1611 |
|
1612 |
if (!dev->msix_table) {
|
1613 |
return;
|
1614 |
} |
1615 |
|
1616 |
memset(dev->msix_table, 0, MSIX_PAGE_SIZE);
|
1617 |
|
1618 |
for (i = 0, entry = dev->msix_table; i < dev->msix_max; i++, entry++) { |
1619 |
entry->ctrl = cpu_to_le32(0x1); /* Masked */ |
1620 |
} |
1621 |
} |
1622 |
|
1623 |
static int assigned_dev_register_msix_mmio(AssignedDevice *dev) |
1624 |
{ |
1625 |
dev->msix_table = mmap(NULL, MSIX_PAGE_SIZE, PROT_READ|PROT_WRITE,
|
1626 |
MAP_ANONYMOUS|MAP_PRIVATE, 0, 0); |
1627 |
if (dev->msix_table == MAP_FAILED) {
|
1628 |
error_report("fail allocate msix_table! %s", strerror(errno));
|
1629 |
return -EFAULT;
|
1630 |
} |
1631 |
|
1632 |
assigned_dev_msix_reset(dev); |
1633 |
|
1634 |
memory_region_init_io(&dev->mmio, &assigned_dev_msix_mmio_ops, dev, |
1635 |
"assigned-dev-msix", MSIX_PAGE_SIZE);
|
1636 |
return 0; |
1637 |
} |
1638 |
|
1639 |
static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev) |
1640 |
{ |
1641 |
if (!dev->msix_table) {
|
1642 |
return;
|
1643 |
} |
1644 |
|
1645 |
memory_region_destroy(&dev->mmio); |
1646 |
|
1647 |
if (munmap(dev->msix_table, MSIX_PAGE_SIZE) == -1) { |
1648 |
error_report("error unmapping msix_table! %s", strerror(errno));
|
1649 |
} |
1650 |
dev->msix_table = NULL;
|
1651 |
} |
1652 |
|
1653 |
static const VMStateDescription vmstate_assigned_device = { |
1654 |
.name = "pci-assign",
|
1655 |
.unmigratable = 1,
|
1656 |
}; |
1657 |
|
1658 |
static void reset_assigned_device(DeviceState *dev) |
1659 |
{ |
1660 |
PCIDevice *pci_dev = DO_UPCAST(PCIDevice, qdev, dev); |
1661 |
AssignedDevice *adev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1662 |
char reset_file[64]; |
1663 |
const char reset[] = "1"; |
1664 |
int fd, ret;
|
1665 |
|
1666 |
/*
|
1667 |
* If a guest is reset without being shutdown, MSI/MSI-X can still
|
1668 |
* be running. We want to return the device to a known state on
|
1669 |
* reset, so disable those here. We especially do not want MSI-X
|
1670 |
* enabled since it lives in MMIO space, which is about to get
|
1671 |
* disabled.
|
1672 |
*/
|
1673 |
if (adev->assigned_irq_type == ASSIGNED_IRQ_MSIX) {
|
1674 |
uint16_t ctrl = pci_get_word(pci_dev->config + |
1675 |
pci_dev->msix_cap + PCI_MSIX_FLAGS); |
1676 |
|
1677 |
pci_set_word(pci_dev->config + pci_dev->msix_cap + PCI_MSIX_FLAGS, |
1678 |
ctrl & ~PCI_MSIX_FLAGS_ENABLE); |
1679 |
assigned_dev_update_msix(pci_dev); |
1680 |
} else if (adev->assigned_irq_type == ASSIGNED_IRQ_MSI) { |
1681 |
uint8_t ctrl = pci_get_byte(pci_dev->config + |
1682 |
pci_dev->msi_cap + PCI_MSI_FLAGS); |
1683 |
|
1684 |
pci_set_byte(pci_dev->config + pci_dev->msi_cap + PCI_MSI_FLAGS, |
1685 |
ctrl & ~PCI_MSI_FLAGS_ENABLE); |
1686 |
assigned_dev_update_msi(pci_dev); |
1687 |
} |
1688 |
|
1689 |
snprintf(reset_file, sizeof(reset_file),
|
1690 |
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/reset",
|
1691 |
adev->host.domain, adev->host.bus, adev->host.slot, |
1692 |
adev->host.function); |
1693 |
|
1694 |
/*
|
1695 |
* Issue a device reset via pci-sysfs. Note that we use write(2) here
|
1696 |
* and ignore the return value because some kernels have a bug that
|
1697 |
* returns 0 rather than bytes written on success, sending us into an
|
1698 |
* infinite retry loop using other write mechanisms.
|
1699 |
*/
|
1700 |
fd = open(reset_file, O_WRONLY); |
1701 |
if (fd != -1) { |
1702 |
ret = write(fd, reset, strlen(reset)); |
1703 |
(void)ret;
|
1704 |
close(fd); |
1705 |
} |
1706 |
|
1707 |
/*
|
1708 |
* When a 0 is written to the bus master register, the device is logically
|
1709 |
* disconnected from the PCI bus. This avoids further DMA transfers.
|
1710 |
*/
|
1711 |
assigned_dev_pci_write_config(pci_dev, PCI_COMMAND, 0, 1); |
1712 |
} |
1713 |
|
1714 |
static int assigned_initfn(struct PCIDevice *pci_dev) |
1715 |
{ |
1716 |
AssignedDevice *dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1717 |
uint8_t e_intx; |
1718 |
int r;
|
1719 |
|
1720 |
if (!kvm_enabled()) {
|
1721 |
error_report("pci-assign: error: requires KVM support");
|
1722 |
return -1; |
1723 |
} |
1724 |
|
1725 |
if (!dev->host.domain && !dev->host.bus && !dev->host.slot &&
|
1726 |
!dev->host.function) { |
1727 |
error_report("pci-assign: error: no host device specified");
|
1728 |
return -1; |
1729 |
} |
1730 |
|
1731 |
/*
|
1732 |
* Set up basic config space access control. Will be further refined during
|
1733 |
* device initialization.
|
1734 |
*/
|
1735 |
assigned_dev_emulate_config_read(dev, 0, PCI_CONFIG_SPACE_SIZE);
|
1736 |
assigned_dev_direct_config_read(dev, PCI_STATUS, 2);
|
1737 |
assigned_dev_direct_config_read(dev, PCI_REVISION_ID, 1);
|
1738 |
assigned_dev_direct_config_read(dev, PCI_CLASS_PROG, 3);
|
1739 |
assigned_dev_direct_config_read(dev, PCI_CACHE_LINE_SIZE, 1);
|
1740 |
assigned_dev_direct_config_read(dev, PCI_LATENCY_TIMER, 1);
|
1741 |
assigned_dev_direct_config_read(dev, PCI_BIST, 1);
|
1742 |
assigned_dev_direct_config_read(dev, PCI_CARDBUS_CIS, 4);
|
1743 |
assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_VENDOR_ID, 2);
|
1744 |
assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_ID, 2);
|
1745 |
assigned_dev_direct_config_read(dev, PCI_CAPABILITY_LIST + 1, 7); |
1746 |
assigned_dev_direct_config_read(dev, PCI_MIN_GNT, 1);
|
1747 |
assigned_dev_direct_config_read(dev, PCI_MAX_LAT, 1);
|
1748 |
memcpy(dev->emulate_config_write, dev->emulate_config_read, |
1749 |
sizeof(dev->emulate_config_read));
|
1750 |
|
1751 |
if (get_real_device(dev, dev->host.domain, dev->host.bus,
|
1752 |
dev->host.slot, dev->host.function)) { |
1753 |
error_report("pci-assign: Error: Couldn't get real device (%s)!",
|
1754 |
dev->dev.qdev.id); |
1755 |
goto out;
|
1756 |
} |
1757 |
|
1758 |
if (assigned_device_pci_cap_init(pci_dev) < 0) { |
1759 |
goto out;
|
1760 |
} |
1761 |
|
1762 |
/* intercept MSI-X entry page in the MMIO */
|
1763 |
if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
|
1764 |
if (assigned_dev_register_msix_mmio(dev)) {
|
1765 |
goto out;
|
1766 |
} |
1767 |
} |
1768 |
|
1769 |
/* handle real device's MMIO/PIO BARs */
|
1770 |
if (assigned_dev_register_regions(dev->real_device.regions,
|
1771 |
dev->real_device.region_number, |
1772 |
dev)) { |
1773 |
goto out;
|
1774 |
} |
1775 |
|
1776 |
/* handle interrupt routing */
|
1777 |
e_intx = dev->dev.config[PCI_INTERRUPT_PIN] - 1;
|
1778 |
dev->intpin = e_intx; |
1779 |
dev->intx_route.mode = PCI_INTX_DISABLED; |
1780 |
dev->intx_route.irq = -1;
|
1781 |
|
1782 |
/* assign device to guest */
|
1783 |
r = assign_device(dev); |
1784 |
if (r < 0) { |
1785 |
goto out;
|
1786 |
} |
1787 |
|
1788 |
/* assign legacy INTx to the device */
|
1789 |
r = assign_intx(dev); |
1790 |
if (r < 0) { |
1791 |
goto assigned_out;
|
1792 |
} |
1793 |
|
1794 |
assigned_dev_load_option_rom(dev); |
1795 |
|
1796 |
add_boot_device_path(dev->bootindex, &pci_dev->qdev, NULL);
|
1797 |
|
1798 |
return 0; |
1799 |
|
1800 |
assigned_out:
|
1801 |
deassign_device(dev); |
1802 |
out:
|
1803 |
free_assigned_device(dev); |
1804 |
return -1; |
1805 |
} |
1806 |
|
1807 |
static void assigned_exitfn(struct PCIDevice *pci_dev) |
1808 |
{ |
1809 |
AssignedDevice *dev = DO_UPCAST(AssignedDevice, dev, pci_dev); |
1810 |
|
1811 |
deassign_device(dev); |
1812 |
free_assigned_device(dev); |
1813 |
} |
1814 |
|
1815 |
static Property assigned_dev_properties[] = {
|
1816 |
DEFINE_PROP_PCI_HOST_DEVADDR("host", AssignedDevice, host),
|
1817 |
DEFINE_PROP_BIT("prefer_msi", AssignedDevice, features,
|
1818 |
ASSIGNED_DEVICE_PREFER_MSI_BIT, false),
|
1819 |
DEFINE_PROP_BIT("share_intx", AssignedDevice, features,
|
1820 |
ASSIGNED_DEVICE_SHARE_INTX_BIT, true),
|
1821 |
DEFINE_PROP_INT32("bootindex", AssignedDevice, bootindex, -1), |
1822 |
DEFINE_PROP_STRING("configfd", AssignedDevice, configfd_name),
|
1823 |
DEFINE_PROP_END_OF_LIST(), |
1824 |
}; |
1825 |
|
1826 |
static void assign_class_init(ObjectClass *klass, void *data) |
1827 |
{ |
1828 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1829 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1830 |
|
1831 |
k->init = assigned_initfn; |
1832 |
k->exit = assigned_exitfn; |
1833 |
k->config_read = assigned_dev_pci_read_config; |
1834 |
k->config_write = assigned_dev_pci_write_config; |
1835 |
dc->props = assigned_dev_properties; |
1836 |
dc->vmsd = &vmstate_assigned_device; |
1837 |
dc->reset = reset_assigned_device; |
1838 |
dc->desc = "KVM-based PCI passthrough";
|
1839 |
} |
1840 |
|
1841 |
static const TypeInfo assign_info = { |
1842 |
.name = "kvm-pci-assign",
|
1843 |
.parent = TYPE_PCI_DEVICE, |
1844 |
.instance_size = sizeof(AssignedDevice),
|
1845 |
.class_init = assign_class_init, |
1846 |
}; |
1847 |
|
1848 |
static void assign_register_types(void) |
1849 |
{ |
1850 |
type_register_static(&assign_info); |
1851 |
} |
1852 |
|
1853 |
type_init(assign_register_types) |
1854 |
|
1855 |
/*
|
1856 |
* Scan the assigned devices for the devices that have an option ROM, and then
|
1857 |
* load the corresponding ROM data to RAM. If an error occurs while loading an
|
1858 |
* option ROM, we just ignore that option ROM and continue with the next one.
|
1859 |
*/
|
1860 |
static void assigned_dev_load_option_rom(AssignedDevice *dev) |
1861 |
{ |
1862 |
char name[32], rom_file[64]; |
1863 |
FILE *fp; |
1864 |
uint8_t val; |
1865 |
struct stat st;
|
1866 |
void *ptr;
|
1867 |
|
1868 |
/* If loading ROM from file, pci handles it */
|
1869 |
if (dev->dev.romfile || !dev->dev.rom_bar) {
|
1870 |
return;
|
1871 |
} |
1872 |
|
1873 |
snprintf(rom_file, sizeof(rom_file),
|
1874 |
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
|
1875 |
dev->host.domain, dev->host.bus, dev->host.slot, |
1876 |
dev->host.function); |
1877 |
|
1878 |
if (stat(rom_file, &st)) {
|
1879 |
return;
|
1880 |
} |
1881 |
|
1882 |
if (access(rom_file, F_OK)) {
|
1883 |
error_report("pci-assign: Insufficient privileges for %s", rom_file);
|
1884 |
return;
|
1885 |
} |
1886 |
|
1887 |
/* Write "1" to the ROM file to enable it */
|
1888 |
fp = fopen(rom_file, "r+");
|
1889 |
if (fp == NULL) { |
1890 |
return;
|
1891 |
} |
1892 |
val = 1;
|
1893 |
if (fwrite(&val, 1, 1, fp) != 1) { |
1894 |
goto close_rom;
|
1895 |
} |
1896 |
fseek(fp, 0, SEEK_SET);
|
1897 |
|
1898 |
snprintf(name, sizeof(name), "%s.rom", |
1899 |
object_get_typename(OBJECT(dev))); |
1900 |
memory_region_init_ram(&dev->dev.rom, name, st.st_size); |
1901 |
vmstate_register_ram(&dev->dev.rom, &dev->dev.qdev); |
1902 |
ptr = memory_region_get_ram_ptr(&dev->dev.rom); |
1903 |
memset(ptr, 0xff, st.st_size);
|
1904 |
|
1905 |
if (!fread(ptr, 1, st.st_size, fp)) { |
1906 |
error_report("pci-assign: Cannot read from host %s", rom_file);
|
1907 |
error_printf("Device option ROM contents are probably invalid "
|
1908 |
"(check dmesg).\nSkip option ROM probe with rombar=0, "
|
1909 |
"or load from file with romfile=\n");
|
1910 |
memory_region_destroy(&dev->dev.rom); |
1911 |
goto close_rom;
|
1912 |
} |
1913 |
|
1914 |
pci_register_bar(&dev->dev, PCI_ROM_SLOT, 0, &dev->dev.rom);
|
1915 |
dev->dev.has_rom = true;
|
1916 |
close_rom:
|
1917 |
/* Write "0" to disable ROM */
|
1918 |
fseek(fp, 0, SEEK_SET);
|
1919 |
val = 0;
|
1920 |
if (!fwrite(&val, 1, 1, fp)) { |
1921 |
DEBUG("%s\n", "Failed to disable pci-sysfs rom file"); |
1922 |
} |
1923 |
fclose(fp); |
1924 |
} |