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/*
* QEMU emulation of common X86 IOMMU
*
* Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "hw/boards.h"
#include "hw/i386/x86-iommu.h"
#include "hw/i386/pc.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "trace.h"
#include "sysemu/kvm.h"
void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
iec_notify_fn fn, void *data)
{
IEC_Notifier *notifier = g_new0(IEC_Notifier, 1);
notifier->iec_notify = fn;
notifier->private = data;
QLIST_INSERT_HEAD(&iommu->iec_notifiers, notifier, list);
}
void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
uint32_t index, uint32_t mask)
{
IEC_Notifier *notifier;
trace_x86_iommu_iec_notify(global, index, mask);
QLIST_FOREACH(notifier, &iommu->iec_notifiers, list) {
if (notifier->iec_notify) {
notifier->iec_notify(notifier->private, global,
index, mask);
}
}
}
/* Generate one MSI message from VTDIrq info */
void x86_iommu_irq_to_msi_message(X86IOMMUIrq *irq, MSIMessage *msg_out)
{
X86IOMMU_MSIMessage msg = {};
/* Generate address bits */
msg.dest_mode = irq->dest_mode;
msg.redir_hint = irq->redir_hint;
msg.dest = irq->dest;
msg.__addr_hi = irq->dest & 0xffffff00;
msg.__addr_head = cpu_to_le32(0xfee);
/* Keep this from original MSI address bits */
msg.__not_used = irq->msi_addr_last_bits;
/* Generate data bits */
msg.vector = irq->vector;
msg.delivery_mode = irq->delivery_mode;
msg.level = 1;
msg.trigger_mode = irq->trigger_mode;
msg_out->address = msg.msi_addr;
msg_out->data = msg.msi_data;
}
/* Default X86 IOMMU device */
static X86IOMMUState *x86_iommu_default = NULL;
static void x86_iommu_set_default(X86IOMMUState *x86_iommu)
{
assert(x86_iommu);
if (x86_iommu_default) {
error_report("QEMU does not support multiple vIOMMUs "
"for x86 yet.");
exit(1);
}
x86_iommu_default = x86_iommu;
}
X86IOMMUState *x86_iommu_get_default(void)
{
return x86_iommu_default;
}
IommuType x86_iommu_get_type(void)
{
return x86_iommu_default->type;
}
static void x86_iommu_realize(DeviceState *dev, Error **errp)
{
X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
MachineState *ms = MACHINE(qdev_get_machine());
MachineClass *mc = MACHINE_GET_CLASS(ms);
PCMachineState *pcms =
PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
QLIST_INIT(&x86_iommu->iec_notifiers);
bool irq_all_kernel = kvm_irqchip_in_kernel() && !kvm_irqchip_is_split();
if (!pcms || !pcms->bus) {
error_setg(errp, "Machine-type '%s' not supported by IOMMU",
mc->name);
return;
}
/* If the user didn't specify IR, choose a default value for it */
if (x86_iommu->intr_supported == ON_OFF_AUTO_AUTO) {
x86_iommu->intr_supported = irq_all_kernel ?
ON_OFF_AUTO_OFF : ON_OFF_AUTO_ON;
}
/* Both Intel and AMD IOMMU IR only support "kernel-irqchip={off|split}" */
if (x86_iommu_ir_supported(x86_iommu) && irq_all_kernel) {
error_setg(errp, "Interrupt Remapping cannot work with "
"kernel-irqchip=on, please use 'split|off'.");
return;
}
if (x86_class->realize) {
x86_class->realize(dev, errp);
}
x86_iommu_set_default(X86_IOMMU_DEVICE(dev));
}
static Property x86_iommu_properties[] = {
DEFINE_PROP_ON_OFF_AUTO("intremap", X86IOMMUState,
intr_supported, ON_OFF_AUTO_AUTO),
DEFINE_PROP_BOOL("device-iotlb", X86IOMMUState, dt_supported, false),
DEFINE_PROP_BOOL("pt", X86IOMMUState, pt_supported, true),
DEFINE_PROP_END_OF_LIST(),
};
static void x86_iommu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = x86_iommu_realize;
dc->props = x86_iommu_properties;
}
bool x86_iommu_ir_supported(X86IOMMUState *s)
{
return s->intr_supported == ON_OFF_AUTO_ON;
}
static const TypeInfo x86_iommu_info = {
.name = TYPE_X86_IOMMU_DEVICE,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(X86IOMMUState),
.class_init = x86_iommu_class_init,
.class_size = sizeof(X86IOMMUClass),
.abstract = true,
};
static void x86_iommu_register_types(void)
{
type_register_static(&x86_iommu_info);
}
type_init(x86_iommu_register_types)
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