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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Handle IOMMU device assignment for PV guests
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1211618737 -3600
# Node ID 28083093cc5de08465c60793a02089a4745ebf3a
# Parent c684cf331f94573ff5829d9701141cf17414b2b8
Handle IOMMU device assignment for PV guests
Added more informative error codes for device assignment domctls.
Introduced python bindings for device assignment and enable xend to
also perform IOMMU device assignment when assigning PCI devices.
Signed-off-by: Espen Skoglund <espen.skoglund@xxxxxxxxxxxxx>
---
tools/python/xen/lowlevel/xc/xc.c | 155 ++++++++++++++++++++++++++--------
tools/python/xen/xend/server/pciif.py | 17 +++
xen/arch/x86/domctl.c | 24 ++++-
3 files changed, 156 insertions(+), 40 deletions(-)
diff -r c684cf331f94 -r 28083093cc5d tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c Sat May 24 09:42:02 2008 +0100
+++ b/tools/python/xen/lowlevel/xc/xc.c Sat May 24 09:45:37 2008 +0100
@@ -106,7 +106,7 @@ static PyObject *pyxc_domain_create(XcOb
static char *kwd_list[] = { "domid", "ssidref", "handle", "flags",
"target", NULL };
if ( !PyArg_ParseTupleAndKeywords(args, kwds, "|iiOii", kwd_list,
- &dom, &ssidref, &pyhandle, &flags,
&target))
+ &dom, &ssidref, &pyhandle, &flags,
&target))
return NULL;
if ( pyhandle != NULL )
{
@@ -434,44 +434,44 @@ static PyObject *pyxc_linux_build(XcObje
dom->vhpt_size_log2 = vhpt;
if ( xc_dom_linux_build(self->xc_handle, dom, domid, mem_mb, image,
- ramdisk, flags, store_evtchn, &store_mfn,
- console_evtchn, &console_mfn) != 0 ) {
- goto out;
+ ramdisk, flags, store_evtchn, &store_mfn,
+ console_evtchn, &console_mfn) != 0 ) {
+ goto out;
}
if ( !(elfnote_dict = PyDict_New()) )
- goto out;
+ goto out;
for ( i = 0; i < ARRAY_SIZE(dom->parms.elf_notes); i++ )
{
- switch ( dom->parms.elf_notes[i].type )
+ switch ( dom->parms.elf_notes[i].type )
{
- case XEN_ENT_NONE:
- continue;
- case XEN_ENT_LONG:
- elfnote = Py_BuildValue("k", dom->parms.elf_notes[i].data.num);
- break;
- case XEN_ENT_STR:
- elfnote = Py_BuildValue("s", dom->parms.elf_notes[i].data.str);
- break;
- }
- PyDict_SetItemString(elfnote_dict,
- dom->parms.elf_notes[i].name,
- elfnote);
- Py_DECREF(elfnote);
+ case XEN_ENT_NONE:
+ continue;
+ case XEN_ENT_LONG:
+ elfnote = Py_BuildValue("k", dom->parms.elf_notes[i].data.num);
+ break;
+ case XEN_ENT_STR:
+ elfnote = Py_BuildValue("s", dom->parms.elf_notes[i].data.str);
+ break;
+ }
+ PyDict_SetItemString(elfnote_dict,
+ dom->parms.elf_notes[i].name,
+ elfnote);
+ Py_DECREF(elfnote);
}
ret = Py_BuildValue("{s:i,s:i,s:N}",
- "store_mfn", store_mfn,
- "console_mfn", console_mfn,
- "notes", elfnote_dict);
+ "store_mfn", store_mfn,
+ "console_mfn", console_mfn,
+ "notes", elfnote_dict);
if ( dom->arch_hooks->native_protocol )
{
- PyObject *native_protocol =
- Py_BuildValue("s", dom->arch_hooks->native_protocol);
- PyDict_SetItemString(ret, "native_protocol", native_protocol);
- Py_DECREF(native_protocol);
+ PyObject *native_protocol =
+ Py_BuildValue("s", dom->arch_hooks->native_protocol);
+ PyDict_SetItemString(ret, "native_protocol", native_protocol);
+ Py_DECREF(native_protocol);
}
xc_dom_release(dom);
@@ -556,7 +556,7 @@ static PyObject *pyxc_test_assign_device
{
uint32_t dom;
char *pci_str;
- uint32_t bdf = 0;
+ int32_t bdf = 0;
int seg, bus, dev, func;
static char *kwd_list[] = { "domid", "pci", NULL };
@@ -571,8 +571,75 @@ static PyObject *pyxc_test_assign_device
bdf |= (func & 0x7) << 8;
if ( xc_test_assign_device(self->xc_handle, dom, bdf) != 0 )
+ {
+ if (errno == ENOSYS)
+ bdf = -1;
break;
-
+ }
+ bdf = 0;
+ }
+
+ return Py_BuildValue("i", bdf);
+}
+
+static PyObject *pyxc_assign_device(XcObject *self,
+ PyObject *args,
+ PyObject *kwds)
+{
+ uint32_t dom;
+ char *pci_str;
+ int32_t bdf = 0;
+ int seg, bus, dev, func;
+
+ static char *kwd_list[] = { "domid", "pci", NULL };
+ if ( !PyArg_ParseTupleAndKeywords(args, kwds, "is", kwd_list,
+ &dom, &pci_str) )
+ return NULL;
+
+ while ( next_bdf(&pci_str, &seg, &bus, &dev, &func) )
+ {
+ bdf |= (bus & 0xff) << 16;
+ bdf |= (dev & 0x1f) << 11;
+ bdf |= (func & 0x7) << 8;
+
+ if ( xc_assign_device(self->xc_handle, dom, bdf) != 0 )
+ {
+ if (errno == ENOSYS)
+ bdf = -1;
+ break;
+ }
+ bdf = 0;
+ }
+
+ return Py_BuildValue("i", bdf);
+}
+
+static PyObject *pyxc_deassign_device(XcObject *self,
+ PyObject *args,
+ PyObject *kwds)
+{
+ uint32_t dom;
+ char *pci_str;
+ int32_t bdf = 0;
+ int seg, bus, dev, func;
+
+ static char *kwd_list[] = { "domid", "pci", NULL };
+ if ( !PyArg_ParseTupleAndKeywords(args, kwds, "is", kwd_list,
+ &dom, &pci_str) )
+ return NULL;
+
+ while ( next_bdf(&pci_str, &seg, &bus, &dev, &func) )
+ {
+ bdf |= (bus & 0xff) << 16;
+ bdf |= (dev & 0x1f) << 11;
+ bdf |= (func & 0x7) << 8;
+
+ if ( xc_deassign_device(self->xc_handle, dom, bdf) != 0 )
+ {
+ if (errno == ENOSYS)
+ bdf = -1;
+ break;
+ }
bdf = 0;
}
@@ -729,8 +796,8 @@ static PyObject *pyxc_hvm_build(XcObject
int memsize, vcpus = 1, acpi = 0, apic = 1;
static char *kwd_list[] = { "domid",
- "memsize", "image", "vcpus", "acpi",
- "apic", NULL };
+ "memsize", "image", "vcpus", "acpi",
+ "apic", NULL };
if ( !PyArg_ParseTupleAndKeywords(args, kwds, "iis|iii", kwd_list,
&dom, &memsize,
&image, &vcpus, &acpi, &apic) )
@@ -782,8 +849,8 @@ static PyObject *pyxc_evtchn_alloc_unbou
}
static PyObject *pyxc_evtchn_reset(XcObject *self,
- PyObject *args,
- PyObject *kwds)
+ PyObject *args,
+ PyObject *kwds)
{
uint32_t dom;
@@ -947,11 +1014,11 @@ static PyObject *pyxc_physinfo(XcObject
for ( i = 0; i < info.nr_nodes; i++ )
{
- xc_availheap(self->xc_handle, 0, 0, i, &free_heap);
- PyList_Append(node_to_memory_obj,
- PyInt_FromLong(free_heap / 1024));
+ xc_availheap(self->xc_handle, 0, 0, i, &free_heap);
+ PyList_Append(node_to_memory_obj,
+ PyInt_FromLong(free_heap / 1024));
}
-
+
PyDict_SetItemString(ret_obj, "node_to_cpu", node_to_cpu_obj);
PyDict_SetItemString(ret_obj, "node_to_memory", node_to_memory_obj);
@@ -1524,6 +1591,22 @@ static PyMethodDef pyxc_methods[] = {
" dom [int]: Identifier of domain to build into.\n"
" pci_str [str]: PCI devices.\n"
"Returns: [int] 0 on success, or device bdf that can't be assigned.\n"
},
+
+ { "assign_device",
+ (PyCFunction)pyxc_assign_device,
+ METH_VARARGS | METH_KEYWORDS, "\n"
+ "Assign device to IOMMU domain.\n"
+ " dom [int]: Domain to assign device to.\n"
+ " pci_str [str]: PCI devices.\n"
+ "Returns: [int] 0 on success, or device bdf that can't be assigned.\n"
},
+
+ { "deassign_device",
+ (PyCFunction)pyxc_deassign_device,
+ METH_VARARGS | METH_KEYWORDS, "\n"
+ "Deassign device from IOMMU domain.\n"
+ " dom [int]: Domain to deassign device from.\n"
+ " pci_str [str]: PCI devices.\n"
+ "Returns: [int] 0 on success, or device bdf that can't be
deassigned.\n" },
{ "sched_id_get",
(PyCFunction)pyxc_sched_id_get,
diff -r c684cf331f94 -r 28083093cc5d tools/python/xen/xend/server/pciif.py
--- a/tools/python/xen/xend/server/pciif.py Sat May 24 09:42:02 2008 +0100
+++ b/tools/python/xen/xend/server/pciif.py Sat May 24 09:45:37 2008 +0100
@@ -248,6 +248,15 @@ class PciController(DevController):
PCIQuirk(dev.vendor, dev.device, dev.subvendor, dev.subdevice, domain,
bus, slot, func)
+ if not self.vm.info.is_hvm():
+ # Setup IOMMU device assignment
+ pci_str = "0x%x, 0x%x, 0x%x, 0x%x" % (domain, bus, slot, func)
+ bdf = xc.assign_device(fe_domid, pci_str)
+ if bdf > 0:
+ raise VmError("Failed to assign device to IOMMU (%x:%x.%x)"
+ % (bus, slot, func))
+ log.debug("pci: assign device %x:%x.%x" % (bus, slot, func))
+
for (start, size) in dev.ioports:
log.debug('pci: enabling ioport 0x%x/0x%x'%(start,size))
rc = xc.domain_ioport_permission(domid = fe_domid, first_port =
start,
@@ -329,6 +338,14 @@ class PciController(DevController):
"command-line parameter or\n"+ \
"bind your slot/device to the PCI backend using sysfs" \
)%(dev.name))
+
+ if not self.vm.info.is_hvm():
+ pci_str = "0x%x, 0x%x, 0x%x, 0x%x" % (domain, bus, slot, func)
+ bdf = xc.deassign_device(fe_domid, pci_str)
+ if bdf > 0:
+ raise VmError("Failed to deassign device from IOMMU (%x:%x.%x)"
+ % (bus, slot, func))
+ log.debug("pci: deassign device %x:%x.%x" % (bus, slot, func))
for (start, size) in dev.ioports:
log.debug('pci: disabling ioport 0x%x/0x%x'%(start,size))
diff -r c684cf331f94 -r 28083093cc5d xen/arch/x86/domctl.c
--- a/xen/arch/x86/domctl.c Sat May 24 09:42:02 2008 +0100
+++ b/xen/arch/x86/domctl.c Sat May 24 09:45:37 2008 +0100
@@ -530,10 +530,11 @@ long arch_do_domctl(
{
u8 bus, devfn;
- ret = -EINVAL;
+ ret = -ENOSYS;
if ( !iommu_enabled )
break;
+ ret = -EINVAL;
bus = (domctl->u.assign_device.machine_bdf >> 16) & 0xff;
devfn = (domctl->u.assign_device.machine_bdf >> 8) & 0xff;
@@ -553,10 +554,11 @@ long arch_do_domctl(
struct domain *d;
u8 bus, devfn;
- ret = -EINVAL;
+ ret = -ENOSYS;
if ( !iommu_enabled )
break;
+ ret = -EINVAL;
if ( unlikely((d = get_domain_by_id(domctl->domain)) == NULL) )
{
gdprintk(XENLOG_ERR,
@@ -565,6 +567,12 @@ long arch_do_domctl(
}
bus = (domctl->u.assign_device.machine_bdf >> 16) & 0xff;
devfn = (domctl->u.assign_device.machine_bdf >> 8) & 0xff;
+
+ if ( !iommu_pv_enabled && !is_hvm_domain(d) )
+ {
+ ret = -ENOSYS;
+ break;
+ }
if ( device_assigned(bus, devfn) )
{
@@ -576,7 +584,7 @@ long arch_do_domctl(
ret = assign_device(d, bus, devfn);
gdprintk(XENLOG_INFO, "XEN_DOMCTL_assign_device: bdf = %x:%x:%x\n",
- bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
+ bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
put_domain(d);
}
break;
@@ -586,10 +594,11 @@ long arch_do_domctl(
struct domain *d;
u8 bus, devfn;
- ret = -EINVAL;
+ ret = -ENOSYS;
if ( !iommu_enabled )
break;
+ ret = -EINVAL;
if ( unlikely((d = get_domain_by_id(domctl->domain)) == NULL) )
{
gdprintk(XENLOG_ERR,
@@ -599,9 +608,16 @@ long arch_do_domctl(
bus = (domctl->u.assign_device.machine_bdf >> 16) & 0xff;
devfn = (domctl->u.assign_device.machine_bdf >> 8) & 0xff;
+ if ( !iommu_pv_enabled && !is_hvm_domain(d) )
+ {
+ ret = -ENOSYS;
+ break;
+ }
+
if ( !device_assigned(bus, devfn) )
break;
+ ret = 0;
deassign_device(d, bus, devfn);
gdprintk(XENLOG_INFO, "XEN_DOMCTL_deassign_device: bdf = %x:%x:%x\n",
bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
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