From: Jagannathan Raman <jag.raman@oracle.com>
PCI BARs read from remote device
PCI config reads/writes sent to remote server
Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
---
hw/vfio/pci.c | 249 ++++++++++++++++++++++++++-------------------
hw/vfio/pci.h | 10 ++
hw/vfio/user-pci.c | 42 ++++++++
3 files changed, 194 insertions(+), 107 deletions(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index c69716f2df..d1da64383e 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1728,7 +1728,7 @@ static bool vfio_msix_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
return true;
}
-static void vfio_teardown_msi(VFIOPCIDevice *vdev)
+void vfio_teardown_msi(VFIOPCIDevice *vdev)
{
msi_uninit(&vdev->pdev);
@@ -1829,7 +1829,7 @@ static void vfio_bars_register(VFIOPCIDevice *vdev)
}
}
-static void vfio_bars_exit(VFIOPCIDevice *vdev)
+void vfio_bars_exit(VFIOPCIDevice *vdev)
{
int i;
@@ -1849,7 +1849,7 @@ static void vfio_bars_exit(VFIOPCIDevice *vdev)
}
}
-static void vfio_bars_finalize(VFIOPCIDevice *vdev)
+void vfio_bars_finalize(VFIOPCIDevice *vdev)
{
int i;
@@ -2417,7 +2417,7 @@ static void vfio_add_ext_cap(VFIOPCIDevice *vdev)
return;
}
-static bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
{
PCIDevice *pdev = &vdev->pdev;
@@ -2766,7 +2766,7 @@ bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
return true;
}
-static bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
{
VFIODevice *vbasedev = &vdev->vbasedev;
struct vfio_region_info *reg_info = NULL;
@@ -2884,7 +2884,7 @@ static void vfio_err_notifier_handler(void *opaque)
* and continue after disabling error recovery support for the
* device.
*/
-static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
+void vfio_register_err_notifier(VFIOPCIDevice *vdev)
{
Error *err = NULL;
int32_t fd;
@@ -2943,7 +2943,7 @@ static void vfio_req_notifier_handler(void *opaque)
}
}
-static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
+void vfio_register_req_notifier(VFIOPCIDevice *vdev)
{
struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
.index = VFIO_PCI_REQ_IRQ_INDEX };
@@ -2998,6 +2998,130 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
vdev->req_enabled = false;
}
+bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp)
+{
+ PCIDevice *pdev = &vdev->pdev;
+ VFIODevice *vbasedev = &vdev->vbasedev;
+
+ /* vfio emulates a lot for us, but some bits need extra love */
+ vdev->emulated_config_bits = g_malloc0(vdev->config_size);
+
+ /* QEMU can choose to expose the ROM or not */
+ memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
+ /* QEMU can also add or extend BARs */
+ memset(vdev->emulated_config_bits + PCI_BASE_ADDRESS_0, 0xff, 6 * 4);
+
+ /*
+ * The PCI spec reserves vendor ID 0xffff as an invalid value. The
+ * device ID is managed by the vendor and need only be a 16-bit value.
+ * Allow any 16-bit value for subsystem so they can be hidden or changed.
+ */
+ if (vdev->vendor_id != PCI_ANY_ID) {
+ if (vdev->vendor_id >= 0xffff) {
+ error_setg(errp, "invalid PCI vendor ID provided");
+ return false;
+ }
+ vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0);
+ trace_vfio_pci_emulated_vendor_id(vdev->vbasedev.name, vdev->vendor_id);
+ } else {
+ vdev->vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
+ }
+
+ if (vdev->device_id != PCI_ANY_ID) {
+ if (vdev->device_id > 0xffff) {
+ error_setg(errp, "invalid PCI device ID provided");
+ return false;
+ }
+ vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0);
+ trace_vfio_pci_emulated_device_id(vbasedev->name, vdev->device_id);
+ } else {
+ vdev->device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
+ }
+
+ if (vdev->sub_vendor_id != PCI_ANY_ID) {
+ if (vdev->sub_vendor_id > 0xffff) {
+ error_setg(errp, "invalid PCI subsystem vendor ID provided");
+ return false;
+ }
+ vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
+ vdev->sub_vendor_id, ~0);
+ trace_vfio_pci_emulated_sub_vendor_id(vbasedev->name,
+ vdev->sub_vendor_id);
+ }
+
+ if (vdev->sub_device_id != PCI_ANY_ID) {
+ if (vdev->sub_device_id > 0xffff) {
+ error_setg(errp, "invalid PCI subsystem device ID provided");
+ return false;
+ }
+ vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0);
+ trace_vfio_pci_emulated_sub_device_id(vbasedev->name,
+ vdev->sub_device_id);
+ }
+
+ /* QEMU can change multi-function devices to single function, or reverse */
+ vdev->emulated_config_bits[PCI_HEADER_TYPE] =
+ PCI_HEADER_TYPE_MULTI_FUNCTION;
+
+ /* Restore or clear multifunction, this is always controlled by QEMU */
+ if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
+ vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
+ } else {
+ vdev->pdev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
+ }
+
+ /*
+ * Clear host resource mapping info. If we choose not to register a
+ * BAR, such as might be the case with the option ROM, we can get
+ * confusing, unwritable, residual addresses from the host here.
+ */
+ memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
+ memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
+
+ vfio_pci_size_rom(vdev);
+
+ vfio_bars_prepare(vdev);
+
+ if (!vfio_msix_early_setup(vdev, errp)) {
+ return false;
+ }
+
+ vfio_bars_register(vdev);
+
+ return true;
+}
+
+bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp)
+{
+ PCIDevice *pdev = &vdev->pdev;
+
+ /* QEMU emulates all of MSI & MSIX */
+ if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
+ memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
+ MSIX_CAP_LENGTH);
+ }
+
+ if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
+ memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
+ vdev->msi_cap_size);
+ }
+
+ if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
+ vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
+ vfio_intx_mmap_enable, vdev);
+ pci_device_set_intx_routing_notifier(&vdev->pdev,
+ vfio_intx_routing_notifier);
+ vdev->irqchip_change_notifier.notify = vfio_irqchip_change;
+ kvm_irqchip_add_change_notifier(&vdev->irqchip_change_notifier);
+ if (!vfio_intx_enable(vdev, errp)) {
+ pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
+ kvm_irqchip_remove_change_notifier(&vdev->irqchip_change_notifier);
+ return false;
+ }
+ }
+ return true;
+}
+
static void vfio_realize(PCIDevice *pdev, Error **errp)
{
ERRP_GUARD();
@@ -3078,90 +3202,15 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
goto error;
}
- /* vfio emulates a lot for us, but some bits need extra love */
- vdev->emulated_config_bits = g_malloc0(vdev->config_size);
-
- /* QEMU can choose to expose the ROM or not */
- memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
- /* QEMU can also add or extend BARs */
- memset(vdev->emulated_config_bits + PCI_BASE_ADDRESS_0, 0xff, 6 * 4);
-
- /*
- * The PCI spec reserves vendor ID 0xffff as an invalid value. The
- * device ID is managed by the vendor and need only be a 16-bit value.
- * Allow any 16-bit value for subsystem so they can be hidden or changed.
- */
- if (vdev->vendor_id != PCI_ANY_ID) {
- if (vdev->vendor_id >= 0xffff) {
- error_setg(errp, "invalid PCI vendor ID provided");
- goto error;
- }
- vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0);
- trace_vfio_pci_emulated_vendor_id(vbasedev->name, vdev->vendor_id);
- } else {
- vdev->vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
- }
-
- if (vdev->device_id != PCI_ANY_ID) {
- if (vdev->device_id > 0xffff) {
- error_setg(errp, "invalid PCI device ID provided");
- goto error;
- }
- vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0);
- trace_vfio_pci_emulated_device_id(vbasedev->name, vdev->device_id);
- } else {
- vdev->device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
- }
-
- if (vdev->sub_vendor_id != PCI_ANY_ID) {
- if (vdev->sub_vendor_id > 0xffff) {
- error_setg(errp, "invalid PCI subsystem vendor ID provided");
- goto error;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
- vdev->sub_vendor_id, ~0);
- trace_vfio_pci_emulated_sub_vendor_id(vbasedev->name,
- vdev->sub_vendor_id);
- }
-
- if (vdev->sub_device_id != PCI_ANY_ID) {
- if (vdev->sub_device_id > 0xffff) {
- error_setg(errp, "invalid PCI subsystem device ID provided");
- goto error;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0);
- trace_vfio_pci_emulated_sub_device_id(vbasedev->name,
- vdev->sub_device_id);
- }
-
- /* QEMU can change multi-function devices to single function, or reverse */
- vdev->emulated_config_bits[PCI_HEADER_TYPE] =
- PCI_HEADER_TYPE_MULTI_FUNCTION;
-
- /* Restore or clear multifunction, this is always controlled by QEMU */
- if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
- vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
- } else {
- vdev->pdev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
+ if (!vfio_pci_config_setup(vdev, errp)) {
+ goto error;
}
/*
- * Clear host resource mapping info. If we choose not to register a
- * BAR, such as might be the case with the option ROM, we can get
- * confusing, unwritable, residual addresses from the host here.
+ * vfio_pci_config_setup will have registered the device's BARs
+ * and setup any MSIX BARs, so errors after it succeeds must
+ * use out_teardown
*/
- memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
- memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
-
- vfio_pci_size_rom(vdev);
-
- vfio_bars_prepare(vdev);
-
- if (!vfio_msix_early_setup(vdev, errp)) {
- goto error;
- }
-
- vfio_bars_register(vdev);
if (!vfio_add_capabilities(vdev, errp)) {
goto out_teardown;
@@ -3200,28 +3249,14 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
}
}
- /* QEMU emulates all of MSI & MSIX */
- if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
- memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
- MSIX_CAP_LENGTH);
- }
-
- if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
- memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
- vdev->msi_cap_size);
+ if (!vfio_interrupt_setup(vdev, errp)) {
+ goto out_teardown;
}
- if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
- vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intx_mmap_enable, vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev,
- vfio_intx_routing_notifier);
- vdev->irqchip_change_notifier.notify = vfio_irqchip_change;
- kvm_irqchip_add_change_notifier(&vdev->irqchip_change_notifier);
- if (!vfio_intx_enable(vdev, errp)) {
- goto out_deregister;
- }
- }
+ /*
+ * vfio_interrupt_setup will have setup INTx's KVM routing
+ * so errors after it succeeds must use out_deregister
+ */
if (vdev->display != ON_OFF_AUTO_OFF) {
if (!vfio_display_probe(vdev, errp)) {
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 040f4995b5..1eeb67bb2e 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -218,6 +218,16 @@ Object *vfio_pci_get_object(VFIODevice *vbasedev);
int vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f, Error **errp);
int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f);
void vfio_pci_put_device(VFIOPCIDevice *vdev);
+bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp);
+void vfio_teardown_msi(VFIOPCIDevice *vdev);
+void vfio_bars_exit(VFIOPCIDevice *vdev);
+void vfio_bars_finalize(VFIOPCIDevice *vdev);
+bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp);
+void vfio_put_device(VFIOPCIDevice *vdev);
+void vfio_register_err_notifier(VFIOPCIDevice *vdev);
+void vfio_register_req_notifier(VFIOPCIDevice *vdev);
+bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp);
+bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp);
void vfio_instance_init(Object *obj);
uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size);
diff --git a/hw/vfio/user-pci.c b/hw/vfio/user-pci.c
index 54b19b68d0..b8a9f7a7fb 100644
--- a/hw/vfio/user-pci.c
+++ b/hw/vfio/user-pci.c
@@ -79,6 +79,7 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
AddressSpace *as;
SocketAddress addr;
VFIOUserProxy *proxy;
+ int ret;
/*
* TODO: make option parser understand SocketAddress
@@ -126,8 +127,45 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
goto error;
}
+ if (!vfio_populate_device(vdev, errp)) {
+ goto error;
+ }
+
+ /* Get a copy of config space */
+ ret = vbasedev->io->region_read(vbasedev, VFIO_PCI_CONFIG_REGION_INDEX, 0,
+ MIN(pci_config_size(pdev), vdev->config_size),
+ pdev->config);
+ if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
+ error_setg_errno(errp, -ret, "failed to read device config space");
+ goto error;
+ }
+
+ if (!vfio_pci_config_setup(vdev, errp)) {
+ goto error;
+ }
+
+ /*
+ * vfio_pci_config_setup will have registered the device's BARs
+ * and setup any MSIX BARs, so errors after it succeeds must
+ * use out_teardown
+ */
+
+ if (!vfio_add_capabilities(vdev, errp)) {
+ goto out_teardown;
+ }
+
+ if (!vfio_interrupt_setup(vdev, errp)) {
+ goto out_teardown;
+ }
+
+ vfio_register_err_notifier(vdev);
+ vfio_register_req_notifier(vdev);
+
return;
+out_teardown:
+ vfio_teardown_msi(vdev);
+ vfio_bars_exit(vdev);
error:
error_prepend(errp, VFIO_MSG_PREFIX, vdev->vbasedev.name);
}
@@ -163,6 +201,10 @@ static void vfio_user_instance_finalize(Object *obj)
VFIOPCIDevice *vdev = VFIO_PCI_BASE(obj);
VFIODevice *vbasedev = &vdev->vbasedev;
+ vfio_bars_finalize(vdev);
+ g_free(vdev->emulated_config_bits);
+ g_free(vdev->rom);
+
vfio_pci_put_device(vdev);
if (vbasedev->proxy != NULL) {
--
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