diff options
Diffstat (limited to 'sys/amd64/vmm')
-rw-r--r-- | sys/amd64/vmm/io/ppt.c | 78 | ||||
-rw-r--r-- | sys/amd64/vmm/vmm.c | 7 |
2 files changed, 51 insertions, 34 deletions
diff --git a/sys/amd64/vmm/io/ppt.c b/sys/amd64/vmm/io/ppt.c index fa7083e..b789f77 100644 --- a/sys/amd64/vmm/io/ppt.c +++ b/sys/amd64/vmm/io/ppt.c @@ -56,7 +56,6 @@ __FBSDID("$FreeBSD$"); /* XXX locking */ -#define MAX_PPTDEVS (sizeof(pptdevs) / sizeof(pptdevs[0])) #define MAX_MSIMSGS 32 /* @@ -77,9 +76,10 @@ struct pptintr_arg { /* pptintr(pptintr_arg) */ uint64_t msg_data; }; -static struct pptdev { +struct pptdev { device_t dev; struct vm *vm; /* owner of this device */ + TAILQ_ENTRY(pptdev) next; struct vm_memory_segment mmio[MAX_MMIOSEGS]; struct { int num_msgs; /* guest state */ @@ -99,7 +99,7 @@ static struct pptdev { void **cookie; struct pptintr_arg *arg; } msix; -} pptdevs[64]; +}; SYSCTL_DECL(_hw_vmm); SYSCTL_NODE(_hw_vmm, OID_AUTO, ppt, CTLFLAG_RW, 0, "bhyve passthru devices"); @@ -108,6 +108,8 @@ static int num_pptdevs; SYSCTL_INT(_hw_vmm_ppt, OID_AUTO, devices, CTLFLAG_RD, &num_pptdevs, 0, "number of pci passthru devices"); +static TAILQ_HEAD(, pptdev) pptdev_list = TAILQ_HEAD_INITIALIZER(pptdev_list); + static int ppt_probe(device_t dev) { @@ -125,26 +127,30 @@ ppt_probe(device_t dev) * - 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) + if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL) + return (ENXIO); + else if (vmm_is_pptdev(bus, slot, func)) return (0); else - return (ENXIO); + /* + * Returning BUS_PROBE_NOWILDCARD here matches devices that the + * SR-IOV infrastructure specified as "ppt" passthrough devices. + * All normal devices that did not have "ppt" specified as their + * driver will not be matched by this. + */ + return (BUS_PROBE_NOWILDCARD); } static int ppt_attach(device_t dev) { - int n; + struct pptdev *ppt; - if (num_pptdevs >= MAX_PPTDEVS) { - printf("ppt_attach: maximum number of pci passthrough devices " - "exceeded\n"); - return (ENXIO); - } + ppt = device_get_softc(dev); - n = num_pptdevs++; - pptdevs[n].dev = dev; + num_pptdevs++; + TAILQ_INSERT_TAIL(&pptdev_list, ppt, next); + ppt->dev = dev; if (bootverbose) device_printf(dev, "attached\n"); @@ -155,10 +161,14 @@ ppt_attach(device_t dev) 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. - */ + struct pptdev *ppt; + + ppt = device_get_softc(dev); + + if (ppt->vm != NULL) + return (EBUSY); + num_pptdevs--; + TAILQ_REMOVE(&pptdev_list, ppt, next); return (0); } @@ -172,22 +182,23 @@ static device_method_t ppt_methods[] = { }; static devclass_t ppt_devclass; -DEFINE_CLASS_0(ppt, ppt_driver, ppt_methods, 0); +DEFINE_CLASS_0(ppt, ppt_driver, ppt_methods, sizeof(struct pptdev)); 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; + struct pptdev *ppt; + int b, s, f; - for (i = 0; i < num_pptdevs; i++) { - dev = pptdevs[i].dev; + TAILQ_FOREACH(ppt, &pptdev_list, next) { + dev = ppt->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 (ppt); } return (NULL); } @@ -297,11 +308,12 @@ ppt_avail_devices(void) int ppt_assigned_devices(struct vm *vm) { - int i, num; + struct pptdev *ppt; + int num; num = 0; - for (i = 0; i < num_pptdevs; i++) { - if (pptdevs[i].vm == vm) + TAILQ_FOREACH(ppt, &pptdev_list, next) { + if (ppt->vm == vm) num++; } return (num); @@ -310,12 +322,11 @@ ppt_assigned_devices(struct vm *vm) boolean_t ppt_is_mmio(struct vm *vm, vm_paddr_t gpa) { - int i, n; + int i; struct pptdev *ppt; struct vm_memory_segment *seg; - for (n = 0; n < num_pptdevs; n++) { - ppt = &pptdevs[n]; + TAILQ_FOREACH(ppt, &pptdev_list, next) { if (ppt->vm != vm) continue; @@ -377,12 +388,13 @@ ppt_unassign_device(struct vm *vm, int bus, int slot, int func) int ppt_unassign_all(struct vm *vm) { - int i, bus, slot, func; + struct pptdev *ppt; + int bus, slot, func; device_t dev; - for (i = 0; i < num_pptdevs; i++) { - if (pptdevs[i].vm == vm) { - dev = pptdevs[i].dev; + TAILQ_FOREACH(ppt, &pptdev_list, next) { + if (ppt->vm == vm) { + dev = ppt->dev; bus = pci_get_bus(dev); slot = pci_get_slot(dev); func = pci_get_function(dev); diff --git a/sys/amd64/vmm/vmm.c b/sys/amd64/vmm/vmm.c index 615a639..9e44549 100644 --- a/sys/amd64/vmm/vmm.c +++ b/sys/amd64/vmm/vmm.c @@ -217,6 +217,11 @@ SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN, &trace_guest_exceptions, 0, "Trap into hypervisor on all guest exceptions and reflect them back"); +static int vmm_force_iommu = 0; +TUNABLE_INT("hw.vmm.force_iommu", &vmm_force_iommu); +SYSCTL_INT(_hw_vmm, OID_AUTO, force_iommu, CTLFLAG_RDTUN, &vmm_force_iommu, 0, + "Force use of I/O MMU even if no passthrough devices were found."); + static void vcpu_cleanup(struct vm *vm, int i, bool destroy) { @@ -321,7 +326,7 @@ vmm_handler(module_t mod, int what, void *arg) switch (what) { case MOD_LOAD: vmmdev_init(); - if (ppt_avail_devices() > 0) + if (vmm_force_iommu || ppt_avail_devices() > 0) iommu_init(); error = vmm_init(); if (error == 0) |