366f60834f
vmm.ko - kernel module for VT-x, VT-d and hypervisor control bhyve - user-space sequencer and i/o emulation vmmctl - dump of hypervisor register state libvmm - front-end to vmm.ko chardev interface bhyve was designed and implemented by Neel Natu. Thanks to the following folk from NetApp who helped to make this available: Joe CaraDonna Peter Snyder Jeff Heller Sandeep Mann Steve Miller Brian Pawlowski
450 lines
9.7 KiB
C
450 lines
9.7 KiB
C
/*-
|
|
* Copyright (c) 2011 NetApp, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/pciio.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcireg.h>
|
|
|
|
#include <machine/resource.h>
|
|
|
|
#include <machine/vmm.h>
|
|
#include <machine/vmm_dev.h>
|
|
|
|
#include "vmm_lapic.h"
|
|
#include "vmm_ktr.h"
|
|
|
|
#include "iommu.h"
|
|
#include "ppt.h"
|
|
|
|
#define MAX_PPTDEVS (sizeof(pptdevs) / sizeof(pptdevs[0]))
|
|
#define MAX_MMIOSEGS (PCIR_MAX_BAR_0 + 1)
|
|
#define MAX_MSIMSGS 32
|
|
|
|
struct pptintr_arg { /* pptintr(pptintr_arg) */
|
|
struct pptdev *pptdev;
|
|
int msg;
|
|
};
|
|
|
|
static struct pptdev {
|
|
device_t dev;
|
|
struct vm *vm; /* owner of this device */
|
|
struct vm_memory_segment mmio[MAX_MMIOSEGS];
|
|
struct {
|
|
int num_msgs; /* guest state */
|
|
int vector;
|
|
int vcpu;
|
|
|
|
int startrid; /* host state */
|
|
struct resource *res[MAX_MSIMSGS];
|
|
void *cookie[MAX_MSIMSGS];
|
|
struct pptintr_arg arg[MAX_MSIMSGS];
|
|
} msi;
|
|
} pptdevs[32];
|
|
|
|
static int num_pptdevs;
|
|
|
|
static int
|
|
ppt_probe(device_t dev)
|
|
{
|
|
int bus, slot, func;
|
|
struct pci_devinfo *dinfo;
|
|
|
|
dinfo = (struct pci_devinfo *)device_get_ivars(dev);
|
|
|
|
bus = pci_get_bus(dev);
|
|
slot = pci_get_slot(dev);
|
|
func = pci_get_function(dev);
|
|
|
|
/*
|
|
* To qualify as a pci passthrough device a device must:
|
|
* - be allowed by administrator to be used in this role
|
|
* - be an endpoint device
|
|
*/
|
|
if (vmm_is_pptdev(bus, slot, func) &&
|
|
(dinfo->cfg.hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_NORMAL)
|
|
return (0);
|
|
else
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
ppt_attach(device_t dev)
|
|
{
|
|
int n;
|
|
|
|
if (num_pptdevs >= MAX_PPTDEVS) {
|
|
printf("ppt_attach: maximum number of pci passthrough devices "
|
|
"exceeded\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
n = num_pptdevs++;
|
|
pptdevs[n].dev = dev;
|
|
|
|
if (bootverbose)
|
|
device_printf(dev, "attached\n");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ppt_detach(device_t dev)
|
|
{
|
|
/*
|
|
* XXX check whether there are any pci passthrough devices assigned
|
|
* to guests before we allow this driver to detach.
|
|
*/
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t ppt_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, ppt_probe),
|
|
DEVMETHOD(device_attach, ppt_attach),
|
|
DEVMETHOD(device_detach, ppt_detach),
|
|
{0, 0}
|
|
};
|
|
|
|
static devclass_t ppt_devclass;
|
|
DEFINE_CLASS_0(ppt, ppt_driver, ppt_methods, 0);
|
|
DRIVER_MODULE(ppt, pci, ppt_driver, ppt_devclass, NULL, NULL);
|
|
|
|
static struct pptdev *
|
|
ppt_find(int bus, int slot, int func)
|
|
{
|
|
device_t dev;
|
|
int i, b, s, f;
|
|
|
|
for (i = 0; i < num_pptdevs; i++) {
|
|
dev = pptdevs[i].dev;
|
|
b = pci_get_bus(dev);
|
|
s = pci_get_slot(dev);
|
|
f = pci_get_function(dev);
|
|
if (bus == b && slot == s && func == f)
|
|
return (&pptdevs[i]);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
ppt_unmap_mmio(struct vm *vm, struct pptdev *ppt)
|
|
{
|
|
int i;
|
|
struct vm_memory_segment *seg;
|
|
|
|
for (i = 0; i < MAX_MMIOSEGS; i++) {
|
|
seg = &ppt->mmio[i];
|
|
if (seg->len == 0)
|
|
continue;
|
|
(void)vm_unmap_mmio(vm, seg->gpa, seg->len);
|
|
bzero(seg, sizeof(struct vm_memory_segment));
|
|
}
|
|
}
|
|
|
|
static void
|
|
ppt_teardown_msi(struct pptdev *ppt)
|
|
{
|
|
int i, rid;
|
|
void *cookie;
|
|
struct resource *res;
|
|
|
|
if (ppt->msi.num_msgs == 0)
|
|
return;
|
|
|
|
for (i = 0; i < ppt->msi.num_msgs; i++) {
|
|
rid = ppt->msi.startrid + i;
|
|
res = ppt->msi.res[i];
|
|
cookie = ppt->msi.cookie[i];
|
|
|
|
if (cookie != NULL)
|
|
bus_teardown_intr(ppt->dev, res, cookie);
|
|
|
|
if (res != NULL)
|
|
bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, res);
|
|
|
|
ppt->msi.res[i] = NULL;
|
|
ppt->msi.cookie[i] = NULL;
|
|
}
|
|
|
|
if (ppt->msi.startrid == 1)
|
|
pci_release_msi(ppt->dev);
|
|
|
|
ppt->msi.num_msgs = 0;
|
|
}
|
|
|
|
int
|
|
ppt_assign_device(struct vm *vm, int bus, int slot, int func)
|
|
{
|
|
struct pptdev *ppt;
|
|
|
|
ppt = ppt_find(bus, slot, func);
|
|
if (ppt != NULL) {
|
|
/*
|
|
* If this device is owned by a different VM then we
|
|
* cannot change its owner.
|
|
*/
|
|
if (ppt->vm != NULL && ppt->vm != vm)
|
|
return (EBUSY);
|
|
|
|
ppt->vm = vm;
|
|
iommu_add_device(vm_iommu_domain(vm), bus, slot, func);
|
|
return (0);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
int
|
|
ppt_unassign_device(struct vm *vm, int bus, int slot, int func)
|
|
{
|
|
struct pptdev *ppt;
|
|
|
|
ppt = ppt_find(bus, slot, func);
|
|
if (ppt != NULL) {
|
|
/*
|
|
* If this device is not owned by this 'vm' then bail out.
|
|
*/
|
|
if (ppt->vm != vm)
|
|
return (EBUSY);
|
|
ppt_unmap_mmio(vm, ppt);
|
|
ppt_teardown_msi(ppt);
|
|
iommu_remove_device(vm_iommu_domain(vm), bus, slot, func);
|
|
ppt->vm = NULL;
|
|
return (0);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
int
|
|
ppt_unassign_all(struct vm *vm)
|
|
{
|
|
int i, bus, slot, func;
|
|
device_t dev;
|
|
|
|
for (i = 0; i < num_pptdevs; i++) {
|
|
if (pptdevs[i].vm == vm) {
|
|
dev = pptdevs[i].dev;
|
|
bus = pci_get_bus(dev);
|
|
slot = pci_get_slot(dev);
|
|
func = pci_get_function(dev);
|
|
ppt_unassign_device(vm, bus, slot, func);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ppt_map_mmio(struct vm *vm, int bus, int slot, int func,
|
|
vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
|
|
{
|
|
int i, error;
|
|
struct vm_memory_segment *seg;
|
|
struct pptdev *ppt;
|
|
|
|
ppt = ppt_find(bus, slot, func);
|
|
if (ppt != NULL) {
|
|
if (ppt->vm != vm)
|
|
return (EBUSY);
|
|
|
|
for (i = 0; i < MAX_MMIOSEGS; i++) {
|
|
seg = &ppt->mmio[i];
|
|
if (seg->len == 0) {
|
|
error = vm_map_mmio(vm, gpa, len, hpa);
|
|
if (error == 0) {
|
|
seg->gpa = gpa;
|
|
seg->len = len;
|
|
seg->hpa = hpa;
|
|
}
|
|
return (error);
|
|
}
|
|
}
|
|
return (ENOSPC);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
static int
|
|
pptintr(void *arg)
|
|
{
|
|
int vec;
|
|
struct pptdev *ppt;
|
|
struct pptintr_arg *pptarg;
|
|
|
|
pptarg = arg;
|
|
ppt = pptarg->pptdev;
|
|
vec = ppt->msi.vector + pptarg->msg;
|
|
|
|
if (ppt->vm != NULL)
|
|
(void) lapic_set_intr(ppt->vm, ppt->msi.vcpu, vec);
|
|
else {
|
|
/*
|
|
* XXX
|
|
* This is not expected to happen - panic?
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* For legacy interrupts give other filters a chance in case
|
|
* the interrupt was not generated by the passthrough device.
|
|
*/
|
|
if (ppt->msi.startrid == 0)
|
|
return (FILTER_STRAY);
|
|
else
|
|
return (FILTER_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* XXX
|
|
* When we try to free the MSI resource the kernel will bind the thread to
|
|
* the host cpu was originally handling the MSI. The function freeing the
|
|
* MSI vector (apic_free_vector()) will panic the kernel if the thread
|
|
* is already bound to a cpu.
|
|
*
|
|
* So, we temporarily unbind the vcpu thread before freeing the MSI resource.
|
|
*/
|
|
static void
|
|
PPT_TEARDOWN_MSI(struct vm *vm, int vcpu, struct pptdev *ppt)
|
|
{
|
|
int pincpu = -1;
|
|
|
|
vm_get_pinning(vm, vcpu, &pincpu);
|
|
|
|
if (pincpu >= 0)
|
|
vm_set_pinning(vm, vcpu, -1);
|
|
|
|
ppt_teardown_msi(ppt);
|
|
|
|
if (pincpu >= 0)
|
|
vm_set_pinning(vm, vcpu, pincpu);
|
|
}
|
|
|
|
int
|
|
ppt_setup_msi(struct vm *vm, int vcpu, int bus, int slot, int func,
|
|
int destcpu, int vector, int numvec)
|
|
{
|
|
int i, rid, flags;
|
|
int msi_count, startrid, error, tmp;
|
|
struct pptdev *ppt;
|
|
|
|
if ((destcpu >= VM_MAXCPU || destcpu < 0) ||
|
|
(vector < 0 || vector > 255) ||
|
|
(numvec < 0 || numvec > MAX_MSIMSGS))
|
|
return (EINVAL);
|
|
|
|
ppt = ppt_find(bus, slot, func);
|
|
if (ppt == NULL)
|
|
return (ENOENT);
|
|
if (ppt->vm != vm) /* Make sure we own this device */
|
|
return (EBUSY);
|
|
|
|
/* Free any allocated resources */
|
|
PPT_TEARDOWN_MSI(vm, vcpu, ppt);
|
|
|
|
if (numvec == 0) /* nothing more to do */
|
|
return (0);
|
|
|
|
flags = RF_ACTIVE;
|
|
msi_count = pci_msi_count(ppt->dev);
|
|
if (msi_count == 0) {
|
|
startrid = 0; /* legacy interrupt */
|
|
msi_count = 1;
|
|
flags |= RF_SHAREABLE;
|
|
} else
|
|
startrid = 1; /* MSI */
|
|
|
|
/*
|
|
* The device must be capable of supporting the number of vectors
|
|
* the guest wants to allocate.
|
|
*/
|
|
if (numvec > msi_count)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Make sure that we can allocate all the MSI vectors that are needed
|
|
* by the guest.
|
|
*/
|
|
if (startrid == 1) {
|
|
tmp = numvec;
|
|
error = pci_alloc_msi(ppt->dev, &tmp);
|
|
if (error)
|
|
return (error);
|
|
else if (tmp != numvec) {
|
|
pci_release_msi(ppt->dev);
|
|
return (ENOSPC);
|
|
} else {
|
|
/* success */
|
|
}
|
|
}
|
|
|
|
ppt->msi.vector = vector;
|
|
ppt->msi.vcpu = destcpu;
|
|
ppt->msi.startrid = startrid;
|
|
|
|
/*
|
|
* Allocate the irq resource and attach it to the interrupt handler.
|
|
*/
|
|
for (i = 0; i < numvec; i++) {
|
|
ppt->msi.num_msgs = i + 1;
|
|
ppt->msi.cookie[i] = NULL;
|
|
|
|
rid = startrid + i;
|
|
ppt->msi.res[i] = bus_alloc_resource_any(ppt->dev, SYS_RES_IRQ,
|
|
&rid, flags);
|
|
if (ppt->msi.res[i] == NULL)
|
|
break;
|
|
|
|
ppt->msi.arg[i].pptdev = ppt;
|
|
ppt->msi.arg[i].msg = i;
|
|
|
|
error = bus_setup_intr(ppt->dev, ppt->msi.res[i],
|
|
INTR_TYPE_NET | INTR_MPSAFE | INTR_FAST,
|
|
pptintr, NULL, &ppt->msi.arg[i],
|
|
&ppt->msi.cookie[i]);
|
|
if (error != 0)
|
|
break;
|
|
}
|
|
|
|
if (i < numvec) {
|
|
PPT_TEARDOWN_MSI(vm, vcpu, ppt);
|
|
return (ENXIO);
|
|
}
|
|
|
|
return (0);
|
|
}
|