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VFIO updates for v5.16-rc1

Browse Source 
- Cleanup vfio iommu_group creation (Christoph Hellwig)
 
  - Add individual device reset for vfio/fsl-mc (Diana Craciun)
 
  - IGD OpRegion 2.0+ support (Colin Xu)
 
  - Use modern cdev lifecycle for vfio_group (Jason Gunthorpe)
 
  - Use new mdev API in vfio_ccw (Jason Gunthorpe)
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Merge tag 'vfio-v5.16-rc1' of git://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - Cleanup vfio iommu_group creation (Christoph Hellwig)

 - Add individual device reset for vfio/fsl-mc (Diana Craciun)

 - IGD OpRegion 2.0+ support (Colin Xu)

 - Use modern cdev lifecycle for vfio_group (Jason Gunthorpe)

 - Use new mdev API in vfio_ccw (Jason Gunthorpe)

* tag 'vfio-v5.16-rc1' of git://github.com/awilliam/linux-vfio: (27 commits)
  vfio/ccw: Convert to use vfio_register_emulated_iommu_dev()
  vfio/ccw: Pass vfio_ccw_private not mdev_device to various functions
  vfio/ccw: Use functions for alloc/free of the vfio_ccw_private
  vfio/ccw: Remove unneeded GFP_DMA
  vfio: Use cdev_device_add() instead of device_create()
  vfio: Use a refcount_t instead of a kref in the vfio_group
  vfio: Don't leak a group reference if the group already exists
  vfio: Do not open code the group list search in vfio_create_group()
  vfio: Delete vfio_get/put_group from vfio_iommu_group_notifier()
  vfio/pci: Add OpRegion 2.0+ Extended VBT support.
  vfio/iommu_type1: remove IS_IOMMU_CAP_DOMAIN_IN_CONTAINER
  vfio/iommu_type1: remove the "external" domain
  vfio/iommu_type1: initialize pgsize_bitmap in ->open
  vfio/spapr_tce: reject mediated devices
  vfio: clean up the check for mediated device in vfio_iommu_type1
  vfio: remove the unused mdev iommu hook
  vfio: move the vfio_iommu_driver_ops interface out of <linux/vfio.h>
  vfio: remove unused method from vfio_iommu_driver_ops
  vfio: simplify iommu group allocation for mediated devices
  vfio: remove the iommudata hack for noiommu groups
  ...
This commit is contained in:
Linus Torvalds 2021-11-03 13:29:36 -07:00
commit d4ec3d5535
23 changed files with 974 additions and 932 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/bus/fsl-mc/Makefile
View File

@ -15,7 +15,8 @@ mc-bus-driver-objs := fsl-mc-bus.o \
dprc-driver.o \
fsl-mc-allocator.o \
fsl-mc-msi.o \
dpmcp.o
dpmcp.o \
obj-api.o
# MC userspace support
obj-$(CONFIG_FSL_MC_UAPI_SUPPORT) += fsl-mc-uapi.o

39
drivers/bus/fsl-mc/fsl-mc-private.h
View File

@ -48,7 +48,6 @@ struct dpmng_rsp_get_version {
/* DPMCP command IDs */
#define DPMCP_CMDID_CLOSE DPMCP_CMD(0x800)
#define DPMCP_CMDID_OPEN DPMCP_CMD(0x80b)
#define DPMCP_CMDID_RESET DPMCP_CMD(0x005)
struct dpmcp_cmd_open {
@ -91,7 +90,6 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
/* DPRC command IDs */
#define DPRC_CMDID_CLOSE DPRC_CMD(0x800)
#define DPRC_CMDID_OPEN DPRC_CMD(0x805)
#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)
#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
@ -453,7 +451,6 @@ int dprc_get_connection(struct fsl_mc_io *mc_io,
/* Command IDs */
#define DPBP_CMDID_CLOSE DPBP_CMD(0x800)
#define DPBP_CMDID_OPEN DPBP_CMD(0x804)
#define DPBP_CMDID_ENABLE DPBP_CMD(0x002)
#define DPBP_CMDID_DISABLE DPBP_CMD(0x003)
@ -492,7 +489,6 @@ struct dpbp_rsp_get_attributes {
/* Command IDs */
#define DPCON_CMDID_CLOSE DPCON_CMD(0x800)
#define DPCON_CMDID_OPEN DPCON_CMD(0x808)
#define DPCON_CMDID_ENABLE DPCON_CMD(0x002)
#define DPCON_CMDID_DISABLE DPCON_CMD(0x003)
@ -524,6 +520,41 @@ struct dpcon_cmd_set_notification {
__le64 user_ctx;
};
/*
* Generic FSL MC API
*/
/* generic command versioning */
#define OBJ_CMD_BASE_VERSION 1
#define OBJ_CMD_ID_OFFSET 4
#define OBJ_CMD(id) (((id) << OBJ_CMD_ID_OFFSET) | OBJ_CMD_BASE_VERSION)
/* open command codes */
#define DPRTC_CMDID_OPEN OBJ_CMD(0x810)
#define DPNI_CMDID_OPEN OBJ_CMD(0x801)
#define DPSW_CMDID_OPEN OBJ_CMD(0x802)
#define DPIO_CMDID_OPEN OBJ_CMD(0x803)
#define DPBP_CMDID_OPEN OBJ_CMD(0x804)
#define DPRC_CMDID_OPEN OBJ_CMD(0x805)
#define DPDMUX_CMDID_OPEN OBJ_CMD(0x806)
#define DPCI_CMDID_OPEN OBJ_CMD(0x807)
#define DPCON_CMDID_OPEN OBJ_CMD(0x808)
#define DPSECI_CMDID_OPEN OBJ_CMD(0x809)
#define DPAIOP_CMDID_OPEN OBJ_CMD(0x80a)
#define DPMCP_CMDID_OPEN OBJ_CMD(0x80b)
#define DPMAC_CMDID_OPEN OBJ_CMD(0x80c)
#define DPDCEI_CMDID_OPEN OBJ_CMD(0x80d)
#define DPDMAI_CMDID_OPEN OBJ_CMD(0x80e)
#define DPDBG_CMDID_OPEN OBJ_CMD(0x80f)
/* Generic object command IDs */
#define OBJ_CMDID_CLOSE OBJ_CMD(0x800)
#define OBJ_CMDID_RESET OBJ_CMD(0x005)
struct fsl_mc_obj_cmd_open {
__le32 obj_id;
};
/**
* struct fsl_mc_resource_pool - Pool of MC resources of a given

103
drivers/bus/fsl-mc/obj-api.c Normal file
View File

@ -0,0 +1,103 @@
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright 2021 NXP
*
*/
#include <linux/kernel.h>
#include <linux/fsl/mc.h>
#include "fsl-mc-private.h"
static int fsl_mc_get_open_cmd_id(const char *type)
{
static const struct {
int cmd_id;
const char *type;
} dev_ids[] = {
{ DPRTC_CMDID_OPEN, "dprtc" },
{ DPRC_CMDID_OPEN, "dprc" },
{ DPNI_CMDID_OPEN, "dpni" },
{ DPIO_CMDID_OPEN, "dpio" },
{ DPSW_CMDID_OPEN, "dpsw" },
{ DPBP_CMDID_OPEN, "dpbp" },
{ DPCON_CMDID_OPEN, "dpcon" },
{ DPMCP_CMDID_OPEN, "dpmcp" },
{ DPMAC_CMDID_OPEN, "dpmac" },
{ DPSECI_CMDID_OPEN, "dpseci" },
{ DPDMUX_CMDID_OPEN, "dpdmux" },
{ DPDCEI_CMDID_OPEN, "dpdcei" },
{ DPAIOP_CMDID_OPEN, "dpaiop" },
{ DPCI_CMDID_OPEN, "dpci" },
{ DPDMAI_CMDID_OPEN, "dpdmai" },
{ DPDBG_CMDID_OPEN, "dpdbg" },
{ 0, NULL }
};
int i;
for (i = 0; dev_ids[i].type; i++)
if (!strcmp(dev_ids[i].type, type))
return dev_ids[i].cmd_id;
return -1;
}
int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
u32 cmd_flags,
int obj_id,
char *obj_type,
u16 *token)
{
struct fsl_mc_command cmd = { 0 };
struct fsl_mc_obj_cmd_open *cmd_params;
int err = 0;
int cmd_id = fsl_mc_get_open_cmd_id(obj_type);
if (cmd_id == -1)
return -ENODEV;
/* prepare command */
cmd.header = mc_encode_cmd_header(cmd_id, cmd_flags, 0);
cmd_params = (struct fsl_mc_obj_cmd_open *)cmd.params;
cmd_params->obj_id = cpu_to_le32(obj_id);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
*token = mc_cmd_hdr_read_token(&cmd);
return err;
}
EXPORT_SYMBOL_GPL(fsl_mc_obj_open);
int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token)
{
struct fsl_mc_command cmd = { 0 };
/* prepare command */
cmd.header = mc_encode_cmd_header(OBJ_CMDID_CLOSE, cmd_flags,
token);
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL_GPL(fsl_mc_obj_close);
int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token)
{
struct fsl_mc_command cmd = { 0 };
/* prepare command */
cmd.header = mc_encode_cmd_header(OBJ_CMDID_RESET, cmd_flags,
token);
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL_GPL(fsl_mc_obj_reset);

158
drivers/s390/cio/vfio_ccw_drv.c
View File

@ -137,16 +137,80 @@ static void vfio_ccw_sch_irq(struct subchannel *sch)
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT);
}
static void vfio_ccw_free_regions(struct vfio_ccw_private *private)
static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch)
{
if (private->crw_region)
kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
if (private->schib_region)
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
if (private->cmd_region)
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
if (private->io_region)
kmem_cache_free(vfio_ccw_io_region, private->io_region);
struct vfio_ccw_private *private;
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (!private)
return ERR_PTR(-ENOMEM);
private->sch = sch;
mutex_init(&private->io_mutex);
private->state = VFIO_CCW_STATE_NOT_OPER;
INIT_LIST_HEAD(&private->crw);
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
INIT_WORK(&private->crw_work, vfio_ccw_crw_todo);
atomic_set(&private->avail, 1);
private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1),
GFP_KERNEL);
if (!private->cp.guest_cp)
goto out_free_private;
private->io_region = kmem_cache_zalloc(vfio_ccw_io_region,
GFP_KERNEL | GFP_DMA);
if (!private->io_region)
goto out_free_cp;
private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region,
GFP_KERNEL | GFP_DMA);
if (!private->cmd_region)
goto out_free_io;
private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region,
GFP_KERNEL | GFP_DMA);
if (!private->schib_region)
goto out_free_cmd;
private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region,
GFP_KERNEL | GFP_DMA);
if (!private->crw_region)
goto out_free_schib;
return private;
out_free_schib:
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
out_free_cmd:
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
out_free_io:
kmem_cache_free(vfio_ccw_io_region, private->io_region);
out_free_cp:
kfree(private->cp.guest_cp);
out_free_private:
mutex_destroy(&private->io_mutex);
kfree(private);
return ERR_PTR(-ENOMEM);
}
static void vfio_ccw_free_private(struct vfio_ccw_private *private)
{
struct vfio_ccw_crw *crw, *temp;
list_for_each_entry_safe(crw, temp, &private->crw, next) {
list_del(&crw->next);
kfree(crw);
}
kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
kmem_cache_free(vfio_ccw_io_region, private->io_region);
kfree(private->cp.guest_cp);
mutex_destroy(&private->io_mutex);
kfree(private);
}
static int vfio_ccw_sch_probe(struct subchannel *sch)
@ -161,53 +225,19 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
return -ENODEV;
}
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
if (!private)
return -ENOMEM;
private = vfio_ccw_alloc_private(sch);
if (IS_ERR(private))
return PTR_ERR(private);
private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1),
GFP_KERNEL);
if (!private->cp.guest_cp)
goto out_free;
private->io_region = kmem_cache_zalloc(vfio_ccw_io_region,
GFP_KERNEL | GFP_DMA);
if (!private->io_region)
goto out_free;
private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region,
GFP_KERNEL | GFP_DMA);
if (!private->cmd_region)
goto out_free;
private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region,
GFP_KERNEL | GFP_DMA);
if (!private->schib_region)
goto out_free;
private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region,
GFP_KERNEL | GFP_DMA);
if (!private->crw_region)
goto out_free;
private->sch = sch;
dev_set_drvdata(&sch->dev, private);
mutex_init(&private->io_mutex);
spin_lock_irq(sch->lock);
private->state = VFIO_CCW_STATE_NOT_OPER;
sch->isc = VFIO_CCW_ISC;
ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
spin_unlock_irq(sch->lock);
if (ret)
goto out_free;
INIT_LIST_HEAD(&private->crw);
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
INIT_WORK(&private->crw_work, vfio_ccw_crw_todo);
atomic_set(&private->avail, 1);
private->state = VFIO_CCW_STATE_STANDBY;
ret = vfio_ccw_mdev_reg(sch);
@ -228,31 +258,20 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
cio_disable_subchannel(sch);
out_free:
dev_set_drvdata(&sch->dev, NULL);
vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
vfio_ccw_free_private(private);
return ret;
}
static void vfio_ccw_sch_remove(struct subchannel *sch)
{
struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
struct vfio_ccw_crw *crw, *temp;
vfio_ccw_sch_quiesce(sch);
list_for_each_entry_safe(crw, temp, &private->crw, next) {
list_del(&crw->next);
kfree(crw);
}
vfio_ccw_mdev_unreg(sch);
dev_set_drvdata(&sch->dev, NULL);
vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
vfio_ccw_free_private(private);
VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n",
sch->schid.cssid, sch->schid.ssid,
@ -449,7 +468,7 @@ static int __init vfio_ccw_sch_init(void)
vfio_ccw_work_q = create_singlethread_workqueue("vfio-ccw");
if (!vfio_ccw_work_q) {
ret = -ENOMEM;
goto out_err;
goto out_regions;
}
vfio_ccw_io_region = kmem_cache_create_usercopy("vfio_ccw_io_region",
@ -458,7 +477,7 @@ static int __init vfio_ccw_sch_init(void)
sizeof(struct ccw_io_region), NULL);
if (!vfio_ccw_io_region) {
ret = -ENOMEM;
goto out_err;
goto out_regions;
}
vfio_ccw_cmd_region = kmem_cache_create_usercopy("vfio_ccw_cmd_region",
@ -467,7 +486,7 @@ static int __init vfio_ccw_sch_init(void)
sizeof(struct ccw_cmd_region), NULL);
if (!vfio_ccw_cmd_region) {
ret = -ENOMEM;
goto out_err;
goto out_regions;
}
vfio_ccw_schib_region = kmem_cache_create_usercopy("vfio_ccw_schib_region",
@ -477,7 +496,7 @@ static int __init vfio_ccw_sch_init(void)
if (!vfio_ccw_schib_region) {
ret = -ENOMEM;
goto out_err;
goto out_regions;
}
vfio_ccw_crw_region = kmem_cache_create_usercopy("vfio_ccw_crw_region",
@ -487,19 +506,25 @@ static int __init vfio_ccw_sch_init(void)
if (!vfio_ccw_crw_region) {
ret = -ENOMEM;
goto out_err;
goto out_regions;
}
ret = mdev_register_driver(&vfio_ccw_mdev_driver);
if (ret)
goto out_regions;
isc_register(VFIO_CCW_ISC);
ret = css_driver_register(&vfio_ccw_sch_driver);
if (ret) {
isc_unregister(VFIO_CCW_ISC);
goto out_err;
goto out_driver;
}
return ret;
out_err:
out_driver:
mdev_unregister_driver(&vfio_ccw_mdev_driver);
out_regions:
vfio_ccw_destroy_regions();
destroy_workqueue(vfio_ccw_work_q);
vfio_ccw_debug_exit();
@ -509,6 +534,7 @@ static int __init vfio_ccw_sch_init(void)
static void __exit vfio_ccw_sch_exit(void)
{
css_driver_unregister(&vfio_ccw_sch_driver);
mdev_unregister_driver(&vfio_ccw_mdev_driver);
isc_unregister(VFIO_CCW_ISC);
vfio_ccw_destroy_regions();
destroy_workqueue(vfio_ccw_work_q);

142
drivers/s390/cio/vfio_ccw_ops.c
View File

@ -17,13 +17,13 @@
#include "vfio_ccw_private.h"
static int vfio_ccw_mdev_reset(struct mdev_device *mdev)
static const struct vfio_device_ops vfio_ccw_dev_ops;
static int vfio_ccw_mdev_reset(struct vfio_ccw_private *private)
{
struct vfio_ccw_private *private;
struct subchannel *sch;
int ret;
private = dev_get_drvdata(mdev_parent_dev(mdev));
sch = private->sch;
/*
* TODO:
@ -61,7 +61,7 @@ static int vfio_ccw_mdev_notifier(struct notifier_block *nb,
if (!cp_iova_pinned(&private->cp, unmap->iova))
return NOTIFY_OK;
if (vfio_ccw_mdev_reset(private->mdev))
if (vfio_ccw_mdev_reset(private))
return NOTIFY_BAD;
cp_free(&private->cp);
@ -113,10 +113,10 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
static int vfio_ccw_mdev_create(struct mdev_device *mdev)
static int vfio_ccw_mdev_probe(struct mdev_device *mdev)
{
struct vfio_ccw_private *private =
dev_get_drvdata(mdev_parent_dev(mdev));
struct vfio_ccw_private *private = dev_get_drvdata(mdev->dev.parent);
int ret;
if (private->state == VFIO_CCW_STATE_NOT_OPER)
return -ENODEV;
@ -124,6 +124,10 @@ static int vfio_ccw_mdev_create(struct mdev_device *mdev)
if (atomic_dec_if_positive(&private->avail) < 0)
return -EPERM;
memset(&private->vdev, 0, sizeof(private->vdev));
vfio_init_group_dev(&private->vdev, &mdev->dev,
&vfio_ccw_dev_ops);
private->mdev = mdev;
private->state = VFIO_CCW_STATE_IDLE;
@ -132,19 +136,31 @@ static int vfio_ccw_mdev_create(struct mdev_device *mdev)
private->sch->schid.ssid,
private->sch->schid.sch_no);
ret = vfio_register_emulated_iommu_dev(&private->vdev);
if (ret)
goto err_atomic;
dev_set_drvdata(&mdev->dev, private);
return 0;
err_atomic:
vfio_uninit_group_dev(&private->vdev);
atomic_inc(&private->avail);
private->mdev = NULL;
private->state = VFIO_CCW_STATE_IDLE;
return ret;
}
static int vfio_ccw_mdev_remove(struct mdev_device *mdev)
static void vfio_ccw_mdev_remove(struct mdev_device *mdev)
{
struct vfio_ccw_private *private =
dev_get_drvdata(mdev_parent_dev(mdev));
struct vfio_ccw_private *private = dev_get_drvdata(mdev->dev.parent);
VFIO_CCW_MSG_EVENT(2, "mdev %pUl, sch %x.%x.%04x: remove\n",
mdev_uuid(mdev), private->sch->schid.cssid,
private->sch->schid.ssid,
private->sch->schid.sch_no);
vfio_unregister_group_dev(&private->vdev);
if ((private->state != VFIO_CCW_STATE_NOT_OPER) &&
(private->state != VFIO_CCW_STATE_STANDBY)) {
if (!vfio_ccw_sch_quiesce(private->sch))
@ -152,23 +168,22 @@ static int vfio_ccw_mdev_remove(struct mdev_device *mdev)
/* The state will be NOT_OPER on error. */
}
vfio_uninit_group_dev(&private->vdev);
cp_free(&private->cp);
private->mdev = NULL;
atomic_inc(&private->avail);
return 0;
}
static int vfio_ccw_mdev_open_device(struct mdev_device *mdev)
static int vfio_ccw_mdev_open_device(struct vfio_device *vdev)
{
struct vfio_ccw_private *private =
dev_get_drvdata(mdev_parent_dev(mdev));
container_of(vdev, struct vfio_ccw_private, vdev);
unsigned long events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
int ret;
private->nb.notifier_call = vfio_ccw_mdev_notifier;
ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
ret = vfio_register_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
&events, &private->nb);
if (ret)
return ret;
@ -189,27 +204,26 @@ static int vfio_ccw_mdev_open_device(struct mdev_device *mdev)
out_unregister:
vfio_ccw_unregister_dev_regions(private);
vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
&private->nb);
return ret;
}
static void vfio_ccw_mdev_close_device(struct mdev_device *mdev)
static void vfio_ccw_mdev_close_device(struct vfio_device *vdev)
{
struct vfio_ccw_private *private =
dev_get_drvdata(mdev_parent_dev(mdev));
container_of(vdev, struct vfio_ccw_private, vdev);
if ((private->state != VFIO_CCW_STATE_NOT_OPER) &&
(private->state != VFIO_CCW_STATE_STANDBY)) {
if (!vfio_ccw_mdev_reset(mdev))
if (!vfio_ccw_mdev_reset(private))
private->state = VFIO_CCW_STATE_STANDBY;
/* The state will be NOT_OPER on error. */
}
cp_free(&private->cp);
vfio_ccw_unregister_dev_regions(private);
vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
&private->nb);
vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY, &private->nb);
}
static ssize_t vfio_ccw_mdev_read_io_region(struct vfio_ccw_private *private,
@ -233,15 +247,14 @@ static ssize_t vfio_ccw_mdev_read_io_region(struct vfio_ccw_private *private,
return ret;
}
static ssize_t vfio_ccw_mdev_read(struct mdev_device *mdev,
static ssize_t vfio_ccw_mdev_read(struct vfio_device *vdev,
char __user *buf,
size_t count,
loff_t *ppos)
{
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
unsigned int index = VFIO_CCW_OFFSET_TO_INDEX(*ppos);
struct vfio_ccw_private *private;
private = dev_get_drvdata(mdev_parent_dev(mdev));
if (index >= VFIO_CCW_NUM_REGIONS + private->num_regions)
return -EINVAL;
@ -286,15 +299,14 @@ static ssize_t vfio_ccw_mdev_write_io_region(struct vfio_ccw_private *private,
return ret;
}
static ssize_t vfio_ccw_mdev_write(struct mdev_device *mdev,
static ssize_t vfio_ccw_mdev_write(struct vfio_device *vdev,
const char __user *buf,
size_t count,
loff_t *ppos)
{
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
unsigned int index = VFIO_CCW_OFFSET_TO_INDEX(*ppos);
struct vfio_ccw_private *private;
private = dev_get_drvdata(mdev_parent_dev(mdev));
if (index >= VFIO_CCW_NUM_REGIONS + private->num_regions)
return -EINVAL;
@ -311,12 +323,9 @@ static ssize_t vfio_ccw_mdev_write(struct mdev_device *mdev,
return -EINVAL;
}
static int vfio_ccw_mdev_get_device_info(struct vfio_device_info *info,
struct mdev_device *mdev)
static int vfio_ccw_mdev_get_device_info(struct vfio_ccw_private *private,
struct vfio_device_info *info)
{
struct vfio_ccw_private *private;
private = dev_get_drvdata(mdev_parent_dev(mdev));
info->flags = VFIO_DEVICE_FLAGS_CCW | VFIO_DEVICE_FLAGS_RESET;
info->num_regions = VFIO_CCW_NUM_REGIONS + private->num_regions;
info->num_irqs = VFIO_CCW_NUM_IRQS;
@ -324,14 +333,12 @@ static int vfio_ccw_mdev_get_device_info(struct vfio_device_info *info,
return 0;
}
static int vfio_ccw_mdev_get_region_info(struct vfio_region_info *info,
struct mdev_device *mdev,
static int vfio_ccw_mdev_get_region_info(struct vfio_ccw_private *private,
struct vfio_region_info *info,
unsigned long arg)
{
struct vfio_ccw_private *private;
int i;
private = dev_get_drvdata(mdev_parent_dev(mdev));
switch (info->index) {
case VFIO_CCW_CONFIG_REGION_INDEX:
info->offset = 0;
@ -406,19 +413,16 @@ static int vfio_ccw_mdev_get_irq_info(struct vfio_irq_info *info)
return 0;
}
static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev,
static int vfio_ccw_mdev_set_irqs(struct vfio_ccw_private *private,
uint32_t flags,
uint32_t index,
void __user *data)
{
struct vfio_ccw_private *private;
struct eventfd_ctx **ctx;
if (!(flags & VFIO_IRQ_SET_ACTION_TRIGGER))
return -EINVAL;
private = dev_get_drvdata(mdev_parent_dev(mdev));
switch (index) {
case VFIO_CCW_IO_IRQ_INDEX:
ctx = &private->io_trigger;
@ -520,10 +524,12 @@ void vfio_ccw_unregister_dev_regions(struct vfio_ccw_private *private)
private->region = NULL;
}
static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
static ssize_t vfio_ccw_mdev_ioctl(struct vfio_device *vdev,
unsigned int cmd,
unsigned long arg)
{
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
int ret = 0;
unsigned long minsz;
@ -540,7 +546,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
if (info.argsz < minsz)
return -EINVAL;
ret = vfio_ccw_mdev_get_device_info(&info, mdev);
ret = vfio_ccw_mdev_get_device_info(private, &info);
if (ret)
return ret;
@ -558,7 +564,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
if (info.argsz < minsz)
return -EINVAL;
ret = vfio_ccw_mdev_get_region_info(&info, mdev, arg);
ret = vfio_ccw_mdev_get_region_info(private, &info, arg);
if (ret)
return ret;
@ -603,47 +609,59 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
return ret;
data = (void __user *)(arg + minsz);
return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, hdr.index, data);
return vfio_ccw_mdev_set_irqs(private, hdr.flags, hdr.index,
data);
}
case VFIO_DEVICE_RESET:
return vfio_ccw_mdev_reset(mdev);
return vfio_ccw_mdev_reset(private);
default:
return -ENOTTY;
}
}
/* Request removal of the device*/
static void vfio_ccw_mdev_request(struct mdev_device *mdev, unsigned int count)
static void vfio_ccw_mdev_request(struct vfio_device *vdev, unsigned int count)
{
struct vfio_ccw_private *private = dev_get_drvdata(mdev_parent_dev(mdev));
if (!private)
return;
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
struct device *dev = vdev->dev;
if (private->req_trigger) {
if (!(count % 10))
dev_notice_ratelimited(mdev_dev(private->mdev),
dev_notice_ratelimited(dev,
"Relaying device request to user (#%u)\n",
count);
eventfd_signal(private->req_trigger, 1);
} else if (count == 0) {
dev_notice(mdev_dev(private->mdev),
dev_notice(dev,
"No device request channel registered, blocked until released by user\n");
}
}
static const struct vfio_device_ops vfio_ccw_dev_ops = {
.open_device = vfio_ccw_mdev_open_device,
.close_device = vfio_ccw_mdev_close_device,
.read = vfio_ccw_mdev_read,
.write = vfio_ccw_mdev_write,
.ioctl = vfio_ccw_mdev_ioctl,
.request = vfio_ccw_mdev_request,
};
struct mdev_driver vfio_ccw_mdev_driver = {
.driver = {
.name = "vfio_ccw_mdev",
.owner = THIS_MODULE,
.mod_name = KBUILD_MODNAME,
},
.probe = vfio_ccw_mdev_probe,
.remove = vfio_ccw_mdev_remove,
};
static const struct mdev_parent_ops vfio_ccw_mdev_ops = {
.owner = THIS_MODULE,
.device_driver = &vfio_ccw_mdev_driver,
.supported_type_groups = mdev_type_groups,
.create = vfio_ccw_mdev_create,
.remove = vfio_ccw_mdev_remove,
.open_device = vfio_ccw_mdev_open_device,
.close_device = vfio_ccw_mdev_close_device,
.read = vfio_ccw_mdev_read,
.write = vfio_ccw_mdev_write,
.ioctl = vfio_ccw_mdev_ioctl,
.request = vfio_ccw_mdev_request,
};
int vfio_ccw_mdev_reg(struct subchannel *sch)

5
drivers/s390/cio/vfio_ccw_private.h
View File

@ -17,6 +17,7 @@
#include <linux/eventfd.h>
#include <linux/workqueue.h>
#include <linux/vfio_ccw.h>
#include <linux/vfio.h>
#include <asm/crw.h>
#include <asm/debug.h>
@ -67,6 +68,7 @@ struct vfio_ccw_crw {
/**
* struct vfio_ccw_private
* @vdev: Embedded VFIO device
* @sch: pointer to the subchannel
* @state: internal state of the device
* @completion: synchronization helper of the I/O completion
@ -90,6 +92,7 @@ struct vfio_ccw_crw {
* @crw_work: work for deferral process of CRW handling
*/
struct vfio_ccw_private {
struct vfio_device vdev;
struct subchannel *sch;
int state;
struct completion *completion;
@ -121,6 +124,8 @@ extern void vfio_ccw_mdev_unreg(struct subchannel *sch);
extern int vfio_ccw_sch_quiesce(struct subchannel *sch);
extern struct mdev_driver vfio_ccw_mdev_driver;
/*
* States of the device statemachine.
*/

2
drivers/s390/crypto/vfio_ap_ops.c
View File

@ -351,7 +351,7 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev)
list_add(&matrix_mdev->node, &matrix_dev->mdev_list);
mutex_unlock(&matrix_dev->lock);
ret = vfio_register_group_dev(&matrix_mdev->vdev);
ret = vfio_register_emulated_iommu_dev(&matrix_mdev->vdev);
if (ret)
goto err_list;
dev_set_drvdata(&mdev->dev, matrix_mdev);

62
drivers/vfio/fsl-mc/vfio_fsl_mc.c
View File

@ -65,6 +65,34 @@ static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
kfree(vdev->regions);
}
static int vfio_fsl_mc_reset_device(struct vfio_fsl_mc_device *vdev)
{
struct fsl_mc_device *mc_dev = vdev->mc_dev;
int ret = 0;
if (is_fsl_mc_bus_dprc(vdev->mc_dev)) {
return dprc_reset_container(mc_dev->mc_io, 0,
mc_dev->mc_handle,
mc_dev->obj_desc.id,
DPRC_RESET_OPTION_NON_RECURSIVE);
} else {
u16 token;
ret = fsl_mc_obj_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
mc_dev->obj_desc.type,
&token);
if (ret)
goto out;
ret = fsl_mc_obj_reset(mc_dev->mc_io, 0, token);
if (ret) {
fsl_mc_obj_close(mc_dev->mc_io, 0, token);
goto out;
}
ret = fsl_mc_obj_close(mc_dev->mc_io, 0, token);
}
out:
return ret;
}
static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
{
@ -78,9 +106,7 @@ static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
vfio_fsl_mc_regions_cleanup(vdev);
/* reset the device before cleaning up the interrupts */
ret = dprc_reset_container(mc_cont->mc_io, 0, mc_cont->mc_handle,
mc_cont->obj_desc.id,
DPRC_RESET_OPTION_NON_RECURSIVE);
ret = vfio_fsl_mc_reset_device(vdev);
if (WARN_ON(ret))
dev_warn(&mc_cont->dev,
@ -203,18 +229,7 @@ static long vfio_fsl_mc_ioctl(struct vfio_device *core_vdev,
}
case VFIO_DEVICE_RESET:
{
int ret;
struct fsl_mc_device *mc_dev = vdev->mc_dev;
/* reset is supported only for the DPRC */
if (!is_fsl_mc_bus_dprc(mc_dev))
return -ENOTTY;
ret = dprc_reset_container(mc_dev->mc_io, 0,
mc_dev->mc_handle,
mc_dev->obj_desc.id,
DPRC_RESET_OPTION_NON_RECURSIVE);
return ret;
return vfio_fsl_mc_reset_device(vdev);
}
default:
@ -505,22 +520,13 @@ static void vfio_fsl_uninit_device(struct vfio_fsl_mc_device *vdev)
static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
{
struct iommu_group *group;
struct vfio_fsl_mc_device *vdev;
struct device *dev = &mc_dev->dev;
int ret;
group = vfio_iommu_group_get(dev);
if (!group) {
dev_err(dev, "VFIO_FSL_MC: No IOMMU group\n");
return -EINVAL;
}
vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
if (!vdev) {
ret = -ENOMEM;
goto out_group_put;
}
if (!vdev)
return -ENOMEM;
vfio_init_group_dev(&vdev->vdev, dev, &vfio_fsl_mc_ops);
vdev->mc_dev = mc_dev;
@ -556,8 +562,6 @@ static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
out_uninit:
vfio_uninit_group_dev(&vdev->vdev);
kfree(vdev);
out_group_put:
vfio_iommu_group_put(group, dev);
return ret;
}
@ -574,8 +578,6 @@ static int vfio_fsl_mc_remove(struct fsl_mc_device *mc_dev)
vfio_uninit_group_dev(&vdev->vdev);
kfree(vdev);
vfio_iommu_group_put(mc_dev->dev.iommu_group, dev);
return 0;
}

45
drivers/vfio/mdev/mdev_driver.c
View File

@ -13,60 +13,23 @@
#include "mdev_private.h"
static int mdev_attach_iommu(struct mdev_device *mdev)
{
int ret;
struct iommu_group *group;
group = iommu_group_alloc();
if (IS_ERR(group))
return PTR_ERR(group);
ret = iommu_group_add_device(group, &mdev->dev);
if (!ret)
dev_info(&mdev->dev, "MDEV: group_id = %d\n",
iommu_group_id(group));
iommu_group_put(group);
return ret;
}
static void mdev_detach_iommu(struct mdev_device *mdev)
{
iommu_group_remove_device(&mdev->dev);
dev_info(&mdev->dev, "MDEV: detaching iommu\n");
}
static int mdev_probe(struct device *dev)
{
struct mdev_driver *drv =
container_of(dev->driver, struct mdev_driver, driver);
struct mdev_device *mdev = to_mdev_device(dev);
int ret;
ret = mdev_attach_iommu(mdev);
if (ret)
return ret;
if (drv->probe) {
ret = drv->probe(mdev);
if (ret)
mdev_detach_iommu(mdev);
}
return ret;
if (!drv->probe)
return 0;
return drv->probe(to_mdev_device(dev));
}
static void mdev_remove(struct device *dev)
{
struct mdev_driver *drv =
container_of(dev->driver, struct mdev_driver, driver);
struct mdev_device *mdev = to_mdev_device(dev);
if (drv->remove)
drv->remove(mdev);
mdev_detach_iommu(mdev);
drv->remove(to_mdev_device(dev));
}
static int mdev_match(struct device *dev, struct device_driver *drv)

2
drivers/vfio/mdev/vfio_mdev.c
View File

@ -119,7 +119,7 @@ static int vfio_mdev_probe(struct mdev_device *mdev)
return -ENOMEM;
vfio_init_group_dev(vdev, &mdev->dev, &vfio_mdev_dev_ops);
ret = vfio_register_group_dev(vdev);
ret = vfio_register_emulated_iommu_dev(vdev);
if (ret)
goto out_uninit;

13
drivers/vfio/pci/vfio_pci_core.c
View File

@ -1806,7 +1806,6 @@ EXPORT_SYMBOL_GPL(vfio_pci_core_uninit_device);
int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev)
{
struct pci_dev *pdev = vdev->pdev;
struct iommu_group *group;
int ret;
if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL)
@ -1825,10 +1824,6 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev)
return -EBUSY;
}
group = vfio_iommu_group_get(&pdev->dev);
if (!group)
return -EINVAL;
if (pci_is_root_bus(pdev->bus)) {
ret = vfio_assign_device_set(&vdev->vdev, vdev);
} else if (!pci_probe_reset_slot(pdev->slot)) {
@ -1842,10 +1837,10 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev)
}
if (ret)
goto out_group_put;
return ret;
ret = vfio_pci_vf_init(vdev);
if (ret)
goto out_group_put;
return ret;
ret = vfio_pci_vga_init(vdev);
if (ret)
goto out_vf;
@ -1876,8 +1871,6 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev)
vfio_pci_set_power_state(vdev, PCI_D0);
out_vf:
vfio_pci_vf_uninit(vdev);
out_group_put:
vfio_iommu_group_put(group, &pdev->dev);
return ret;
}
EXPORT_SYMBOL_GPL(vfio_pci_core_register_device);
@ -1893,8 +1886,6 @@ void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev)
vfio_pci_vf_uninit(vdev);
vfio_pci_vga_uninit(vdev);
vfio_iommu_group_put(pdev->dev.iommu_group, &pdev->dev);
if (!disable_idle_d3)
vfio_pci_set_power_state(vdev, PCI_D0);
}

236
drivers/vfio/pci/vfio_pci_igd.c
View File

@ -25,20 +25,121 @@
#define OPREGION_RVDS 0x3c2
#define OPREGION_VERSION 0x16
struct igd_opregion_vbt {
void *opregion;
void *vbt_ex;
};
/**
* igd_opregion_shift_copy() - Copy OpRegion to user buffer and shift position.
* @dst: User buffer ptr to copy to.
* @off: Offset to user buffer ptr. Increased by bytes on return.
* @src: Source buffer to copy from.
* @pos: Increased by bytes on return.
* @remaining: Decreased by bytes on return.
* @bytes: Bytes to copy and adjust off, pos and remaining.
*
* Copy OpRegion to offset from specific source ptr and shift the offset.
*
* Return: 0 on success, -EFAULT otherwise.
*
*/
static inline unsigned long igd_opregion_shift_copy(char __user *dst,
loff_t *off,
void *src,
loff_t *pos,
size_t *remaining,
size_t bytes)
{
if (copy_to_user(dst + (*off), src, bytes))
return -EFAULT;
*off += bytes;
*pos += bytes;
*remaining -= bytes;
return 0;
}
static ssize_t vfio_pci_igd_rw(struct vfio_pci_core_device *vdev,
char __user *buf, size_t count, loff_t *ppos,
bool iswrite)
{
unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - VFIO_PCI_NUM_REGIONS;
void *base = vdev->region[i].data;
loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK;
struct igd_opregion_vbt *opregionvbt = vdev->region[i].data;
loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK, off = 0;
size_t remaining;
if (pos >= vdev->region[i].size || iswrite)
return -EINVAL;
count = min(count, (size_t)(vdev->region[i].size - pos));
count = min_t(size_t, count, vdev->region[i].size - pos);
remaining = count;
if (copy_to_user(buf, base + pos, count))
/* Copy until OpRegion version */
if (remaining && pos < OPREGION_VERSION) {
size_t bytes = min_t(size_t, remaining, OPREGION_VERSION - pos);
if (igd_opregion_shift_copy(buf, &off,
opregionvbt->opregion + pos, &pos,
&remaining, bytes))
return -EFAULT;
}
/* Copy patched (if necessary) OpRegion version */
if (remaining && pos < OPREGION_VERSION + sizeof(__le16)) {
size_t bytes = min_t(size_t, remaining,
OPREGION_VERSION + sizeof(__le16) - pos);
__le16 version = *(__le16 *)(opregionvbt->opregion +
OPREGION_VERSION);
/* Patch to 2.1 if OpRegion 2.0 has extended VBT */
if (le16_to_cpu(version) == 0x0200 && opregionvbt->vbt_ex)
version = cpu_to_le16(0x0201);
if (igd_opregion_shift_copy(buf, &off,
&version + (pos - OPREGION_VERSION),
&pos, &remaining, bytes))
return -EFAULT;
}
/* Copy until RVDA */
if (remaining && pos < OPREGION_RVDA) {
size_t bytes = min_t(size_t, remaining, OPREGION_RVDA - pos);
if (igd_opregion_shift_copy(buf, &off,
opregionvbt->opregion + pos, &pos,
&remaining, bytes))
return -EFAULT;
}
/* Copy modified (if necessary) RVDA */
if (remaining && pos < OPREGION_RVDA + sizeof(__le64)) {
size_t bytes = min_t(size_t, remaining,
OPREGION_RVDA + sizeof(__le64) - pos);
__le64 rvda = cpu_to_le64(opregionvbt->vbt_ex ?
OPREGION_SIZE : 0);
if (igd_opregion_shift_copy(buf, &off,
&rvda + (pos - OPREGION_RVDA),
&pos, &remaining, bytes))
return -EFAULT;
}
/* Copy the rest of OpRegion */
if (remaining && pos < OPREGION_SIZE) {
size_t bytes = min_t(size_t, remaining, OPREGION_SIZE - pos);
if (igd_opregion_shift_copy(buf, &off,
opregionvbt->opregion + pos, &pos,
&remaining, bytes))
return -EFAULT;
}
/* Copy extended VBT if exists */
if (remaining &&
copy_to_user(buf + off, opregionvbt->vbt_ex + (pos - OPREGION_SIZE),
remaining))
return -EFAULT;
*ppos += count;
@ -49,7 +150,13 @@ static ssize_t vfio_pci_igd_rw(struct vfio_pci_core_device *vdev,
static void vfio_pci_igd_release(struct vfio_pci_core_device *vdev,
struct vfio_pci_region *region)
{
memunmap(region->data);
struct igd_opregion_vbt *opregionvbt = region->data;
if (opregionvbt->vbt_ex)
memunmap(opregionvbt->vbt_ex);
memunmap(opregionvbt->opregion);
kfree(opregionvbt);
}
static const struct vfio_pci_regops vfio_pci_igd_regops = {
@ -61,7 +168,7 @@ static int vfio_pci_igd_opregion_init(struct vfio_pci_core_device *vdev)
{
__le32 *dwordp = (__le32 *)(vdev->vconfig + OPREGION_PCI_ADDR);
u32 addr, size;
void *base;
struct igd_opregion_vbt *opregionvbt;
int ret;
u16 version;
@ -72,84 +179,93 @@ static int vfio_pci_igd_opregion_init(struct vfio_pci_core_device *vdev)
if (!addr || !(~addr))
return -ENODEV;
base = memremap(addr, OPREGION_SIZE, MEMREMAP_WB);
if (!base)
opregionvbt = kzalloc(sizeof(*opregionvbt), GFP_KERNEL);
if (!opregionvbt)
return -ENOMEM;
if (memcmp(base, OPREGION_SIGNATURE, 16)) {
memunmap(base);
opregionvbt->opregion = memremap(addr, OPREGION_SIZE, MEMREMAP_WB);
if (!opregionvbt->opregion) {
kfree(opregionvbt);
return -ENOMEM;
}
if (memcmp(opregionvbt->opregion, OPREGION_SIGNATURE, 16)) {
memunmap(opregionvbt->opregion);
kfree(opregionvbt);
return -EINVAL;
}
size = le32_to_cpu(*(__le32 *)(base + 16));
size = le32_to_cpu(*(__le32 *)(opregionvbt->opregion + 16));
if (!size) {
memunmap(base);
memunmap(opregionvbt->opregion);
kfree(opregionvbt);
return -EINVAL;
}
size *= 1024; /* In KB */
/*
* Support opregion v2.1+
* When VBT data exceeds 6KB size and cannot be within mailbox #4, then
* the Extended VBT region next to opregion is used to hold the VBT data.
* RVDA (Relative Address of VBT Data from Opregion Base) and RVDS
* (Raw VBT Data Size) from opregion structure member are used to hold the
* address from region base and size of VBT data. RVDA/RVDS are not
* defined before opregion 2.0.
* OpRegion and VBT:
* When VBT data doesn't exceed 6KB, it's stored in Mailbox #4.
* When VBT data exceeds 6KB size, Mailbox #4 is no longer large enough
* to hold the VBT data, the Extended VBT region is introduced since
* OpRegion 2.0 to hold the VBT data. Since OpRegion 2.0, RVDA/RVDS are
* introduced to define the extended VBT data location and size.
* OpRegion 2.0: RVDA defines the absolute physical address of the
* extended VBT data, RVDS defines the VBT data size.
* OpRegion 2.1 and above: RVDA defines the relative address of the
* extended VBT data to OpRegion base, RVDS defines the VBT data size.
*
* opregion 2.1+: RVDA is unsigned, relative offset from
* opregion base, and should point to the end of opregion.
* otherwise, exposing to userspace to allow read access to everything between
* the OpRegion and VBT is not safe.
* RVDS is defined as size in bytes.
*
* opregion 2.0: rvda is the physical VBT address.
* Since rvda is HPA it cannot be directly used in guest.
* And it should not be practically available for end user,so it is not supported.
* Due to the RVDA definition diff in OpRegion VBT (also the only diff
* between 2.0 and 2.1), exposing OpRegion and VBT as a contiguous range
* for OpRegion 2.0 and above makes it possible to support the
* non-contiguous VBT through a single vfio region. From r/w ops view,
* only contiguous VBT after OpRegion with version 2.1+ is exposed,
* regardless the host OpRegion is 2.0 or non-contiguous 2.1+. The r/w
* ops will on-the-fly shift the actural offset into VBT so that data at
* correct position can be returned to the requester.
*/
version = le16_to_cpu(*(__le16 *)(base + OPREGION_VERSION));
version = le16_to_cpu(*(__le16 *)(opregionvbt->opregion +
OPREGION_VERSION));
if (version >= 0x0200) {
u64 rvda;
u32 rvds;
u64 rvda = le64_to_cpu(*(__le64 *)(opregionvbt->opregion +
OPREGION_RVDA));
u32 rvds = le32_to_cpu(*(__le32 *)(opregionvbt->opregion +
OPREGION_RVDS));
rvda = le64_to_cpu(*(__le64 *)(base + OPREGION_RVDA));
rvds = le32_to_cpu(*(__le32 *)(base + OPREGION_RVDS));
/* The extended VBT is valid only when RVDA/RVDS are non-zero */
if (rvda && rvds) {
/* no support for opregion v2.0 with physical VBT address */
if (version == 0x0200) {
memunmap(base);
pci_err(vdev->pdev,
"IGD assignment does not support opregion v2.0 with an extended VBT region\n");
return -EINVAL;
}
if (rvda != size) {
memunmap(base);
pci_err(vdev->pdev,
"Extended VBT does not follow opregion on version 0x%04x\n",
version);
return -EINVAL;
}
/* region size for opregion v2.0+: opregion and VBT size. */
size += rvds;
}
}
if (size != OPREGION_SIZE) {
memunmap(base);
base = memremap(addr, size, MEMREMAP_WB);
if (!base)
return -ENOMEM;
/*
* Extended VBT location by RVDA:
* Absolute physical addr for 2.0.
* Relative addr to OpRegion header for 2.1+.
*/
if (version == 0x0200)
addr = rvda;
else
addr += rvda;
opregionvbt->vbt_ex = memremap(addr, rvds, MEMREMAP_WB);
if (!opregionvbt->vbt_ex) {
memunmap(opregionvbt->opregion);
kfree(opregionvbt);
return -ENOMEM;
}
}
}
ret = vfio_pci_register_dev_region(vdev,
PCI_VENDOR_ID_INTEL | VFIO_REGION_TYPE_PCI_VENDOR_TYPE,
VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION,
&vfio_pci_igd_regops, size, VFIO_REGION_INFO_FLAG_READ, base);
VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, &vfio_pci_igd_regops,
size, VFIO_REGION_INFO_FLAG_READ, opregionvbt);
if (ret) {
memunmap(base);
if (opregionvbt->vbt_ex)
memunmap(opregionvbt->vbt_ex);
memunmap(opregionvbt->opregion);
kfree(opregionvbt);
return ret;
}

13
drivers/vfio/platform/vfio_platform_common.c
View File

@ -642,7 +642,6 @@ static int vfio_platform_of_probe(struct vfio_platform_device *vdev,
int vfio_platform_probe_common(struct vfio_platform_device *vdev,
struct device *dev)
{
struct iommu_group *group;
int ret;
vfio_init_group_dev(&vdev->vdev, dev, &vfio_platform_ops);
@ -663,24 +662,15 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
goto out_uninit;
}
group = vfio_iommu_group_get(dev);
if (!group) {
dev_err(dev, "No IOMMU group for device %s\n", vdev->name);
ret = -EINVAL;
goto put_reset;
}
ret = vfio_register_group_dev(&vdev->vdev);
if (ret)
goto put_iommu;
goto put_reset;
mutex_init(&vdev->igate);
pm_runtime_enable(dev);
return 0;
put_iommu:
vfio_iommu_group_put(group, dev);
put_reset:
vfio_platform_put_reset(vdev);
out_uninit:
@ -696,7 +686,6 @@ void vfio_platform_remove_common(struct vfio_platform_device *vdev)
pm_runtime_disable(vdev->device);
vfio_platform_put_reset(vdev);
vfio_uninit_group_dev(&vdev->vdev);
vfio_iommu_group_put(vdev->vdev.dev->iommu_group, vdev->vdev.dev);
}
EXPORT_SYMBOL_GPL(vfio_platform_remove_common);

656
drivers/vfio/vfio.c
View File

@ -32,6 +32,7 @@
#include <linux/vfio.h>
#include <linux/wait.h>
#include <linux/sched/signal.h>
#include "vfio.h"
#define DRIVER_VERSION "0.3"
#define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>"
@ -42,9 +43,8 @@ static struct vfio {
struct list_head iommu_drivers_list;
struct mutex iommu_drivers_lock;
struct list_head group_list;
struct idr group_idr;
struct mutex group_lock;
struct cdev group_cdev;
struct mutex group_lock; /* locks group_list */
struct ida group_ida;
dev_t group_devt;
} vfio;
@ -68,14 +68,14 @@ struct vfio_unbound_dev {
};
struct vfio_group {
struct kref kref;
int minor;
struct device dev;
struct cdev cdev;
refcount_t users;
atomic_t container_users;
struct iommu_group *iommu_group;
struct vfio_container *container;
struct list_head device_list;
struct mutex device_lock;
struct device *dev;
struct notifier_block nb;
struct list_head vfio_next;
struct list_head container_next;
@ -83,7 +83,7 @@ struct vfio_group {
struct mutex unbound_lock;
atomic_t opened;
wait_queue_head_t container_q;
bool noiommu;
enum vfio_group_type type;
unsigned int dev_counter;
struct kvm *kvm;
struct blocking_notifier_head notifier;
@ -97,6 +97,7 @@ MODULE_PARM_DESC(enable_unsafe_noiommu_mode, "Enable UNSAFE, no-IOMMU mode. Thi
#endif
static DEFINE_XARRAY(vfio_device_set_xa);
static const struct file_operations vfio_group_fops;
int vfio_assign_device_set(struct vfio_device *device, void *set_id)
{
@ -169,70 +170,6 @@ static void vfio_release_device_set(struct vfio_device *device)
xa_unlock(&vfio_device_set_xa);
}
/*
* vfio_iommu_group_{get,put} are only intended for VFIO bus driver probe
* and remove functions, any use cases other than acquiring the first
* reference for the purpose of calling vfio_register_group_dev() or removing
* that symmetric reference after vfio_unregister_group_dev() should use the raw
* iommu_group_{get,put} functions. In particular, vfio_iommu_group_put()
* removes the device from the dummy group and cannot be nested.
*/
struct iommu_group *vfio_iommu_group_get(struct device *dev)
{
struct iommu_group *group;
int __maybe_unused ret;
group = iommu_group_get(dev);
#ifdef CONFIG_VFIO_NOIOMMU
/*
* With noiommu enabled, an IOMMU group will be created for a device
* that doesn't already have one and doesn't have an iommu_ops on their
* bus. We set iommudata simply to be able to identify these groups
* as special use and for reclamation later.
*/
if (group || !noiommu || iommu_present(dev->bus))
return group;
group = iommu_group_alloc();
if (IS_ERR(group))
return NULL;
iommu_group_set_name(group, "vfio-noiommu");
iommu_group_set_iommudata(group, &noiommu, NULL);
ret = iommu_group_add_device(group, dev);
if (ret) {
iommu_group_put(group);
return NULL;
}
/*
* Where to taint? At this point we've added an IOMMU group for a
* device that is not backed by iommu_ops, therefore any iommu_
* callback using iommu_ops can legitimately Oops. So, while we may
* be about to give a DMA capable device to a user without IOMMU
* protection, which is clearly taint-worthy, let's go ahead and do
* it here.
*/
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
dev_warn(dev, "Adding kernel taint for vfio-noiommu group on device\n");
#endif
return group;
}
EXPORT_SYMBOL_GPL(vfio_iommu_group_get);
void vfio_iommu_group_put(struct iommu_group *group, struct device *dev)
{
#ifdef CONFIG_VFIO_NOIOMMU
if (iommu_group_get_iommudata(group) == &noiommu)
iommu_group_remove_device(dev);
#endif
iommu_group_put(group);
}
EXPORT_SYMBOL_GPL(vfio_iommu_group_put);
#ifdef CONFIG_VFIO_NOIOMMU
static void *vfio_noiommu_open(unsigned long arg)
{
@ -258,9 +195,9 @@ static long vfio_noiommu_ioctl(void *iommu_data,
}
static int vfio_noiommu_attach_group(void *iommu_data,
struct iommu_group *iommu_group)
struct iommu_group *iommu_group, enum vfio_group_type type)
{
return iommu_group_get_iommudata(iommu_group) == &noiommu ? 0 : -EINVAL;
return 0;
}
static void vfio_noiommu_detach_group(void *iommu_data,
@ -277,8 +214,23 @@ static const struct vfio_iommu_driver_ops vfio_noiommu_ops = {
.attach_group = vfio_noiommu_attach_group,
.detach_group = vfio_noiommu_detach_group,
};
#endif
/*
* Only noiommu containers can use vfio-noiommu and noiommu containers can only
* use vfio-noiommu.
*/
static inline bool vfio_iommu_driver_allowed(struct vfio_container *container,
const struct vfio_iommu_driver *driver)
{
return container->noiommu == (driver->ops == &vfio_noiommu_ops);
}
#else
static inline bool vfio_iommu_driver_allowed(struct vfio_container *container,
const struct vfio_iommu_driver *driver)
{
return true;
}
#endif /* CONFIG_VFIO_NOIOMMU */
/**
* IOMMU driver registration
@ -329,19 +281,6 @@ void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops)
}
EXPORT_SYMBOL_GPL(vfio_unregister_iommu_driver);
/**
* Group minor allocation/free - both called with vfio.group_lock held
*/
static int vfio_alloc_group_minor(struct vfio_group *group)
{
return idr_alloc(&vfio.group_idr, group, 0, MINORMASK + 1, GFP_KERNEL);
}
static void vfio_free_group_minor(int minor)
{
idr_remove(&vfio.group_idr, minor);
}
static int vfio_iommu_group_notifier(struct notifier_block *nb,
unsigned long action, void *data);
static void vfio_group_get(struct vfio_group *group);
@ -370,105 +309,38 @@ static void vfio_container_put(struct vfio_container *container)
kref_put(&container->kref, vfio_container_release);
}
static void vfio_group_unlock_and_free(struct vfio_group *group)
{
mutex_unlock(&vfio.group_lock);
/*
* Unregister outside of lock. A spurious callback is harmless now
* that the group is no longer in vfio.group_list.
*/
iommu_group_unregister_notifier(group->iommu_group, &group->nb);
kfree(group);
}
/**
* Group objects - create, release, get, put, search
*/
static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group)
static struct vfio_group *
__vfio_group_get_from_iommu(struct iommu_group *iommu_group)
{
struct vfio_group *group, *tmp;
struct device *dev;
int ret, minor;
struct vfio_group *group;
group = kzalloc(sizeof(*group), GFP_KERNEL);
if (!group)
return ERR_PTR(-ENOMEM);
kref_init(&group->kref);
INIT_LIST_HEAD(&group->device_list);
mutex_init(&group->device_lock);
INIT_LIST_HEAD(&group->unbound_list);
mutex_init(&group->unbound_lock);
atomic_set(&group->container_users, 0);
atomic_set(&group->opened, 0);
init_waitqueue_head(&group->container_q);
group->iommu_group = iommu_group;
#ifdef CONFIG_VFIO_NOIOMMU
group->noiommu = (iommu_group_get_iommudata(iommu_group) == &noiommu);
#endif
BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier);
group->nb.notifier_call = vfio_iommu_group_notifier;
/*
* blocking notifiers acquire a rwsem around registering and hold
* it around callback. Therefore, need to register outside of
* vfio.group_lock to avoid A-B/B-A contention. Our callback won't
* do anything unless it can find the group in vfio.group_list, so
* no harm in registering early.
*/
ret = iommu_group_register_notifier(iommu_group, &group->nb);
if (ret) {
kfree(group);
return ERR_PTR(ret);
}
mutex_lock(&vfio.group_lock);
/* Did we race creating this group? */
list_for_each_entry(tmp, &vfio.group_list, vfio_next) {
if (tmp->iommu_group == iommu_group) {
vfio_group_get(tmp);
vfio_group_unlock_and_free(group);
return tmp;
list_for_each_entry(group, &vfio.group_list, vfio_next) {
if (group->iommu_group == iommu_group) {
vfio_group_get(group);
return group;
}
}
return NULL;
}
minor = vfio_alloc_group_minor(group);
if (minor < 0) {
vfio_group_unlock_and_free(group);
return ERR_PTR(minor);
}
dev = device_create(vfio.class, NULL,
MKDEV(MAJOR(vfio.group_devt), minor),
group, "%s%d", group->noiommu ? "noiommu-" : "",
iommu_group_id(iommu_group));
if (IS_ERR(dev)) {
vfio_free_group_minor(minor);
vfio_group_unlock_and_free(group);
return ERR_CAST(dev);
}
group->minor = minor;
group->dev = dev;
list_add(&group->vfio_next, &vfio.group_list);
static struct vfio_group *
vfio_group_get_from_iommu(struct iommu_group *iommu_group)
{
struct vfio_group *group;
mutex_lock(&vfio.group_lock);
group = __vfio_group_get_from_iommu(iommu_group);
mutex_unlock(&vfio.group_lock);
return group;
}
/* called with vfio.group_lock held */
static void vfio_group_release(struct kref *kref)
static void vfio_group_release(struct device *dev)
{
struct vfio_group *group = container_of(kref, struct vfio_group, kref);
struct vfio_group *group = container_of(dev, struct vfio_group, dev);
struct vfio_unbound_dev *unbound, *tmp;
struct iommu_group *iommu_group = group->iommu_group;
WARN_ON(!list_empty(&group->device_list));
WARN_ON(group->notifier.head);
list_for_each_entry_safe(unbound, tmp,
&group->unbound_list, unbound_next) {
@ -476,105 +348,129 @@ static void vfio_group_release(struct kref *kref)
kfree(unbound);
}
device_destroy(vfio.class, MKDEV(MAJOR(vfio.group_devt), group->minor));
list_del(&group->vfio_next);
vfio_free_group_minor(group->minor);
vfio_group_unlock_and_free(group);
iommu_group_put(iommu_group);
mutex_destroy(&group->device_lock);
mutex_destroy(&group->unbound_lock);
iommu_group_put(group->iommu_group);
ida_free(&vfio.group_ida, MINOR(group->dev.devt));
kfree(group);
}
static struct vfio_group *vfio_group_alloc(struct iommu_group *iommu_group,
enum vfio_group_type type)
{
struct vfio_group *group;
int minor;
group = kzalloc(sizeof(*group), GFP_KERNEL);
if (!group)
return ERR_PTR(-ENOMEM);
minor = ida_alloc_max(&vfio.group_ida, MINORMASK, GFP_KERNEL);
if (minor < 0) {
kfree(group);
return ERR_PTR(minor);
}
device_initialize(&group->dev);
group->dev.devt = MKDEV(MAJOR(vfio.group_devt), minor);
group->dev.class = vfio.class;
group->dev.release = vfio_group_release;
cdev_init(&group->cdev, &vfio_group_fops);
group->cdev.owner = THIS_MODULE;
refcount_set(&group->users, 1);
INIT_LIST_HEAD(&group->device_list);
mutex_init(&group->device_lock);
INIT_LIST_HEAD(&group->unbound_list);
mutex_init(&group->unbound_lock);
init_waitqueue_head(&group->container_q);
group->iommu_group = iommu_group;
/* put in vfio_group_release() */
iommu_group_ref_get(iommu_group);
group->type = type;
BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier);
return group;
}
static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group,
enum vfio_group_type type)
{
struct vfio_group *group;
struct vfio_group *ret;
int err;
group = vfio_group_alloc(iommu_group, type);
if (IS_ERR(group))
return group;
err = dev_set_name(&group->dev, "%s%d",
group->type == VFIO_NO_IOMMU ? "noiommu-" : "",
iommu_group_id(iommu_group));
if (err) {
ret = ERR_PTR(err);
goto err_put;
}
group->nb.notifier_call = vfio_iommu_group_notifier;
err = iommu_group_register_notifier(iommu_group, &group->nb);
if (err) {
ret = ERR_PTR(err);
goto err_put;
}
mutex_lock(&vfio.group_lock);
/* Did we race creating this group? */
ret = __vfio_group_get_from_iommu(iommu_group);
if (ret)
goto err_unlock;
err = cdev_device_add(&group->cdev, &group->dev);
if (err) {
ret = ERR_PTR(err);
goto err_unlock;
}
list_add(&group->vfio_next, &vfio.group_list);
mutex_unlock(&vfio.group_lock);
return group;
err_unlock:
mutex_unlock(&vfio.group_lock);
iommu_group_unregister_notifier(group->iommu_group, &group->nb);
err_put:
put_device(&group->dev);
return ret;
}
static void vfio_group_put(struct vfio_group *group)
{
kref_put_mutex(&group->kref, vfio_group_release, &vfio.group_lock);
}
struct vfio_group_put_work {
struct work_struct work;
struct vfio_group *group;
};
static void vfio_group_put_bg(struct work_struct *work)
{
struct vfio_group_put_work *do_work;
do_work = container_of(work, struct vfio_group_put_work, work);
vfio_group_put(do_work->group);
kfree(do_work);
}
static void vfio_group_schedule_put(struct vfio_group *group)
{
struct vfio_group_put_work *do_work;
do_work = kmalloc(sizeof(*do_work), GFP_KERNEL);
if (WARN_ON(!do_work))
if (!refcount_dec_and_mutex_lock(&group->users, &vfio.group_lock))
return;
INIT_WORK(&do_work->work, vfio_group_put_bg);
do_work->group = group;
schedule_work(&do_work->work);
/*
* These data structures all have paired operations that can only be
* undone when the caller holds a live reference on the group. Since all
* pairs must be undone these WARN_ON's indicate some caller did not
* properly hold the group reference.
*/
WARN_ON(!list_empty(&group->device_list));
WARN_ON(atomic_read(&group->container_users));
WARN_ON(group->notifier.head);
list_del(&group->vfio_next);
cdev_device_del(&group->cdev, &group->dev);
mutex_unlock(&vfio.group_lock);
iommu_group_unregister_notifier(group->iommu_group, &group->nb);
put_device(&group->dev);
}
/* Assume group_lock or group reference is held */
static void vfio_group_get(struct vfio_group *group)
{
kref_get(&group->kref);
}
/*
* Not really a try as we will sleep for mutex, but we need to make
* sure the group pointer is valid under lock and get a reference.
*/
static struct vfio_group *vfio_group_try_get(struct vfio_group *group)
{
struct vfio_group *target = group;
mutex_lock(&vfio.group_lock);
list_for_each_entry(group, &vfio.group_list, vfio_next) {
if (group == target) {
vfio_group_get(group);
mutex_unlock(&vfio.group_lock);
return group;
}
}
mutex_unlock(&vfio.group_lock);
return NULL;
}
static
struct vfio_group *vfio_group_get_from_iommu(struct iommu_group *iommu_group)
{
struct vfio_group *group;
mutex_lock(&vfio.group_lock);
list_for_each_entry(group, &vfio.group_list, vfio_next) {
if (group->iommu_group == iommu_group) {
vfio_group_get(group);
mutex_unlock(&vfio.group_lock);
return group;
}
}
mutex_unlock(&vfio.group_lock);
return NULL;
}
static struct vfio_group *vfio_group_get_from_minor(int minor)
{
struct vfio_group *group;
mutex_lock(&vfio.group_lock);
group = idr_find(&vfio.group_idr, minor);
if (!group) {
mutex_unlock(&vfio.group_lock);
return NULL;
}
vfio_group_get(group);
mutex_unlock(&vfio.group_lock);
return group;
refcount_inc(&group->users);
}
static struct vfio_group *vfio_group_get_from_dev(struct device *dev)
@ -740,14 +636,6 @@ static int vfio_iommu_group_notifier(struct notifier_block *nb,
struct device *dev = data;
struct vfio_unbound_dev *unbound;
/*
* Need to go through a group_lock lookup to get a reference or we
* risk racing a group being removed. Ignore spurious notifies.
*/
group = vfio_group_try_get(group);
if (!group)
return NOTIFY_OK;
switch (action) {
case IOMMU_GROUP_NOTIFY_ADD_DEVICE:
vfio_group_nb_add_dev(group, dev);
@ -798,15 +686,6 @@ static int vfio_iommu_group_notifier(struct notifier_block *nb,
mutex_unlock(&group->unbound_lock);
break;
}
/*
* If we're the last reference to the group, the group will be
* released, which includes unregistering the iommu group notifier.
* We hold a read-lock on that notifier list, unregistering needs
* a write-lock... deadlock. Release our reference asynchronously
* to avoid that situation.
*/
vfio_group_schedule_put(group);
return NOTIFY_OK;
}
@ -828,11 +707,78 @@ void vfio_uninit_group_dev(struct vfio_device *device)
}
EXPORT_SYMBOL_GPL(vfio_uninit_group_dev);
int vfio_register_group_dev(struct vfio_device *device)
static struct vfio_group *vfio_noiommu_group_alloc(struct device *dev,
enum vfio_group_type type)
{
struct vfio_device *existing_device;
struct iommu_group *iommu_group;
struct vfio_group *group;
int ret;
iommu_group = iommu_group_alloc();
if (IS_ERR(iommu_group))
return ERR_CAST(iommu_group);
iommu_group_set_name(iommu_group, "vfio-noiommu");
ret = iommu_group_add_device(iommu_group, dev);
if (ret)
goto out_put_group;
group = vfio_create_group(iommu_group, type);
if (IS_ERR(group)) {
ret = PTR_ERR(group);
goto out_remove_device;
}
iommu_group_put(iommu_group);
return group;
out_remove_device:
iommu_group_remove_device(dev);
out_put_group:
iommu_group_put(iommu_group);
return ERR_PTR(ret);
}
static struct vfio_group *vfio_group_find_or_alloc(struct device *dev)
{
struct iommu_group *iommu_group;
struct vfio_group *group;
iommu_group = iommu_group_get(dev);
#ifdef CONFIG_VFIO_NOIOMMU
if (!iommu_group && noiommu && !iommu_present(dev->bus)) {
/*
* With noiommu enabled, create an IOMMU group for devices that
* don't already have one and don't have an iommu_ops on their
* bus. Taint the kernel because we're about to give a DMA
* capable device to a user without IOMMU protection.
*/
group = vfio_noiommu_group_alloc(dev, VFIO_NO_IOMMU);
if (!IS_ERR(group)) {
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
dev_warn(dev, "Adding kernel taint for vfio-noiommu group on device\n");
}
return group;
}
#endif
if (!iommu_group)
return ERR_PTR(-EINVAL);
group = vfio_group_get_from_iommu(iommu_group);
if (!group)
group = vfio_create_group(iommu_group, VFIO_IOMMU);
/* The vfio_group holds a reference to the iommu_group */
iommu_group_put(iommu_group);
return group;
}
static int __vfio_register_dev(struct vfio_device *device,
struct vfio_group *group)
{
struct vfio_device *existing_device;
if (IS_ERR(group))
return PTR_ERR(group);
/*
* If the driver doesn't specify a set then the device is added to a
@ -841,30 +787,14 @@ int vfio_register_group_dev(struct vfio_device *device)
if (!device->dev_set)
vfio_assign_device_set(device, device);
iommu_group = iommu_group_get(device->dev);
if (!iommu_group)
return -EINVAL;
group = vfio_group_get_from_iommu(iommu_group);
if (!group) {
group = vfio_create_group(iommu_group);
if (IS_ERR(group)) {
iommu_group_put(iommu_group);
return PTR_ERR(group);
}
} else {
/*
* A found vfio_group already holds a reference to the
* iommu_group. A created vfio_group keeps the reference.
*/
iommu_group_put(iommu_group);
}
existing_device = vfio_group_get_device(group, device->dev);
if (existing_device) {
dev_WARN(device->dev, "Device already exists on group %d\n",
iommu_group_id(iommu_group));
iommu_group_id(group->iommu_group));
vfio_device_put(existing_device);
if (group->type == VFIO_NO_IOMMU ||
group->type == VFIO_EMULATED_IOMMU)
iommu_group_remove_device(device->dev);
vfio_group_put(group);
return -EBUSY;
}
@ -882,8 +812,25 @@ int vfio_register_group_dev(struct vfio_device *device)
return 0;
}
int vfio_register_group_dev(struct vfio_device *device)
{
return __vfio_register_dev(device,
vfio_group_find_or_alloc(device->dev));
}
EXPORT_SYMBOL_GPL(vfio_register_group_dev);
/*
* Register a virtual device without IOMMU backing. The user of this
* device must not be able to directly trigger unmediated DMA.
*/
int vfio_register_emulated_iommu_dev(struct vfio_device *device)
{
return __vfio_register_dev(device,
vfio_noiommu_group_alloc(device->dev, VFIO_EMULATED_IOMMU));
}
EXPORT_SYMBOL_GPL(vfio_register_emulated_iommu_dev);
/**
* Get a reference to the vfio_device for a device. Even if the
* caller thinks they own the device, they could be racing with a
@ -1010,6 +957,9 @@ void vfio_unregister_group_dev(struct vfio_device *device)
if (list_empty(&group->device_list))
wait_event(group->container_q, !group->container);
if (group->type == VFIO_NO_IOMMU || group->type == VFIO_EMULATED_IOMMU)
iommu_group_remove_device(device->dev);
/* Matches the get in vfio_register_group_dev() */
vfio_group_put(group);
}
@ -1042,13 +992,10 @@ static long vfio_ioctl_check_extension(struct vfio_container *container,
list_for_each_entry(driver, &vfio.iommu_drivers_list,
vfio_next) {
#ifdef CONFIG_VFIO_NOIOMMU
if (!list_empty(&container->group_list) &&
(container->noiommu !=
(driver->ops == &vfio_noiommu_ops)))
!vfio_iommu_driver_allowed(container,
driver))
continue;
#endif
if (!try_module_get(driver->ops->owner))
continue;
@ -1079,7 +1026,8 @@ static int __vfio_container_attach_groups(struct vfio_container *container,
int ret = -ENODEV;
list_for_each_entry(group, &container->group_list, container_next) {
ret = driver->ops->attach_group(data, group->iommu_group);
ret = driver->ops->attach_group(data, group->iommu_group,
group->type);
if (ret)
goto unwind;
}
@ -1120,15 +1068,8 @@ static long vfio_ioctl_set_iommu(struct vfio_container *container,
list_for_each_entry(driver, &vfio.iommu_drivers_list, vfio_next) {
void *data;
#ifdef CONFIG_VFIO_NOIOMMU
/*
* Only noiommu containers can use vfio-noiommu and noiommu
* containers can only use vfio-noiommu.
*/
if (container->noiommu != (driver->ops == &vfio_noiommu_ops))
if (!vfio_iommu_driver_allowed(container, driver))
continue;
#endif
if (!try_module_get(driver->ops->owner))
continue;
@ -1234,62 +1175,12 @@ static int vfio_fops_release(struct inode *inode, struct file *filep)
return 0;
}
/*
* Once an iommu driver is set, we optionally pass read/write/mmap
* on to the driver, allowing management interfaces beyond ioctl.
*/
static ssize_t vfio_fops_read(struct file *filep, char __user *buf,
size_t count, loff_t *ppos)
{
struct vfio_container *container = filep->private_data;
struct vfio_iommu_driver *driver;
ssize_t ret = -EINVAL;
driver = container->iommu_driver;
if (likely(driver && driver->ops->read))
ret = driver->ops->read(container->iommu_data,
buf, count, ppos);
return ret;
}
static ssize_t vfio_fops_write(struct file *filep, const char __user *buf,
size_t count, loff_t *ppos)
{
struct vfio_container *container = filep->private_data;
struct vfio_iommu_driver *driver;
ssize_t ret = -EINVAL;
driver = container->iommu_driver;
if (likely(driver && driver->ops->write))
ret = driver->ops->write(container->iommu_data,
buf, count, ppos);
return ret;
}
static int vfio_fops_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct vfio_container *container = filep->private_data;
struct vfio_iommu_driver *driver;
int ret = -EINVAL;
driver = container->iommu_driver;
if (likely(driver && driver->ops->mmap))
ret = driver->ops->mmap(container->iommu_data, vma);
return ret;
}
static const struct file_operations vfio_fops = {
.owner = THIS_MODULE,
.open = vfio_fops_open,
.release = vfio_fops_release,
.read = vfio_fops_read,
.write = vfio_fops_write,
.unlocked_ioctl = vfio_fops_unl_ioctl,
.compat_ioctl = compat_ptr_ioctl,
.mmap = vfio_fops_mmap,
};
/**
@ -1366,7 +1257,7 @@ static int vfio_group_set_container(struct vfio_group *group, int container_fd)
if (atomic_read(&group->container_users))
return -EINVAL;
if (group->noiommu && !capable(CAP_SYS_RAWIO))
if (group->type == VFIO_NO_IOMMU && !capable(CAP_SYS_RAWIO))
return -EPERM;
f = fdget(container_fd);
@ -1386,7 +1277,7 @@ static int vfio_group_set_container(struct vfio_group *group, int container_fd)
/* Real groups and fake groups cannot mix */
if (!list_empty(&container->group_list) &&
container->noiommu != group->noiommu) {
container->noiommu != (group->type == VFIO_NO_IOMMU)) {
ret = -EPERM;
goto unlock_out;
}
@ -1394,13 +1285,14 @@ static int vfio_group_set_container(struct vfio_group *group, int container_fd)
driver = container->iommu_driver;
if (driver) {
ret = driver->ops->attach_group(container->iommu_data,
group->iommu_group);
group->iommu_group,
group->type);
if (ret)
goto unlock_out;
}
group->container = container;
container->noiommu = group->noiommu;
container->noiommu = (group->type == VFIO_NO_IOMMU);
list_add(&group->container_next, &container->group_list);
/* Get a reference on the container and mark a user within the group */
@ -1424,7 +1316,7 @@ static int vfio_group_add_container_user(struct vfio_group *group)
if (!atomic_inc_not_zero(&group->container_users))
return -EINVAL;
if (group->noiommu) {
if (group->type == VFIO_NO_IOMMU) {
atomic_dec(&group->container_users);
return -EPERM;
}
@ -1449,7 +1341,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
!group->container->iommu_driver || !vfio_group_viable(group))
return -EINVAL;
if (group->noiommu && !capable(CAP_SYS_RAWIO))
if (group->type == VFIO_NO_IOMMU && !capable(CAP_SYS_RAWIO))
return -EPERM;
device = vfio_device_get_from_name(group, buf);
@ -1496,7 +1388,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
fd_install(fdno, filep);
if (group->noiommu)
if (group->type == VFIO_NO_IOMMU)
dev_warn(device->dev, "vfio-noiommu device opened by user "
"(%s:%d)\n", current->comm, task_pid_nr(current));
return fdno;
@ -1585,14 +1477,15 @@ static long vfio_group_fops_unl_ioctl(struct file *filep,
static int vfio_group_fops_open(struct inode *inode, struct file *filep)
{
struct vfio_group *group;
struct vfio_group *group =
container_of(inode->i_cdev, struct vfio_group, cdev);
int opened;
group = vfio_group_get_from_minor(iminor(inode));
if (!group)
/* users can be zero if this races with vfio_group_put() */
if (!refcount_inc_not_zero(&group->users))
return -ENODEV;
if (group->noiommu && !capable(CAP_SYS_RAWIO)) {
if (group->type == VFIO_NO_IOMMU && !capable(CAP_SYS_RAWIO)) {
vfio_group_put(group);
return -EPERM;
}
@ -1757,6 +1650,9 @@ struct vfio_group *vfio_group_get_external_user(struct file *filep)
if (ret)
return ERR_PTR(ret);
/*
* Since the caller holds the fget on the file group->users must be >= 1
*/
vfio_group_get(group);
return group;
@ -2396,7 +2292,7 @@ static int __init vfio_init(void)
{
int ret;
idr_init(&vfio.group_idr);
ida_init(&vfio.group_ida);
mutex_init(&vfio.group_lock);
mutex_init(&vfio.iommu_drivers_lock);
INIT_LIST_HEAD(&vfio.group_list);
@ -2421,11 +2317,6 @@ static int __init vfio_init(void)
if (ret)
goto err_alloc_chrdev;
cdev_init(&vfio.group_cdev, &vfio_group_fops);
ret = cdev_add(&vfio.group_cdev, vfio.group_devt, MINORMASK + 1);
if (ret)
goto err_cdev_add;
pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
#ifdef CONFIG_VFIO_NOIOMMU
@ -2433,8 +2324,6 @@ static int __init vfio_init(void)
#endif
return 0;
err_cdev_add:
unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);
err_alloc_chrdev:
class_destroy(vfio.class);
vfio.class = NULL;
@ -2450,8 +2339,7 @@ static void __exit vfio_cleanup(void)
#ifdef CONFIG_VFIO_NOIOMMU
vfio_unregister_iommu_driver(&vfio_noiommu_ops);
#endif
idr_destroy(&vfio.group_idr);
cdev_del(&vfio.group_cdev);
ida_destroy(&vfio.group_ida);
unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);
class_destroy(vfio.class);
vfio.class = NULL;

72
drivers/vfio/vfio.h Normal file
View File

@ -0,0 +1,72 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
* Author: Alex Williamson <alex.williamson@redhat.com>
*/
enum vfio_group_type {
/*
* Physical device with IOMMU backing.
*/
VFIO_IOMMU,
/*
* Virtual device without IOMMU backing. The VFIO core fakes up an
* iommu_group as the iommu_group sysfs interface is part of the
* userspace ABI. The user of these devices must not be able to
* directly trigger unmediated DMA.
*/
VFIO_EMULATED_IOMMU,
/*
* Physical device without IOMMU backing. The VFIO core fakes up an
* iommu_group as the iommu_group sysfs interface is part of the
* userspace ABI. Users can trigger unmediated DMA by the device,
* usage is highly dangerous, requires an explicit opt-in and will
* taint the kernel.
*/
VFIO_NO_IOMMU,
};
/* events for the backend driver notify callback */
enum vfio_iommu_notify_type {
VFIO_IOMMU_CONTAINER_CLOSE = 0,
};
/**
* struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
*/
struct vfio_iommu_driver_ops {
char *name;
struct module *owner;
void *(*open)(unsigned long arg);
void (*release)(void *iommu_data);
long (*ioctl)(void *iommu_data, unsigned int cmd,
unsigned long arg);
int (*attach_group)(void *iommu_data,
struct iommu_group *group,
enum vfio_group_type);
void (*detach_group)(void *iommu_data,
struct iommu_group *group);
int (*pin_pages)(void *iommu_data,
struct iommu_group *group,
unsigned long *user_pfn,
int npage, int prot,
unsigned long *phys_pfn);
int (*unpin_pages)(void *iommu_data,
unsigned long *user_pfn, int npage);
int (*register_notifier)(void *iommu_data,
unsigned long *events,
struct notifier_block *nb);
int (*unregister_notifier)(void *iommu_data,
struct notifier_block *nb);
int (*dma_rw)(void *iommu_data, dma_addr_t user_iova,
void *data, size_t count, bool write);
struct iommu_domain *(*group_iommu_domain)(void *iommu_data,
struct iommu_group *group);
void (*notify)(void *iommu_data,
enum vfio_iommu_notify_type event);
};
int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);

6
drivers/vfio/vfio_iommu_spapr_tce.c
View File

@ -20,6 +20,7 @@
#include <linux/sched/mm.h>
#include <linux/sched/signal.h>
#include <linux/mm.h>
#include "vfio.h"
#include <asm/iommu.h>
#include <asm/tce.h>
@ -1238,13 +1239,16 @@ static long tce_iommu_take_ownership_ddw(struct tce_container *container,
}
static int tce_iommu_attach_group(void *iommu_data,
struct iommu_group *iommu_group)
struct iommu_group *iommu_group, enum vfio_group_type type)
{
int ret = 0;
struct tce_container *container = iommu_data;
struct iommu_table_group *table_group;
struct tce_iommu_group *tcegrp = NULL;
if (type == VFIO_EMULATED_IOMMU)
return -EINVAL;
mutex_lock(&container->lock);
/* pr_debug("tce_vfio: Attaching group #%u to iommu %p\n",

256
drivers/vfio/vfio_iommu_type1.c
View File

@ -36,10 +36,10 @@
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/workqueue.h>
#include <linux/mdev.h>
#include <linux/notifier.h>
#include <linux/dma-iommu.h>
#include <linux/irqdomain.h>
#include "vfio.h"
#define DRIVER_VERSION "0.2"
#define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>"
@ -65,7 +65,6 @@ MODULE_PARM_DESC(dma_entry_limit,
struct vfio_iommu {
struct list_head domain_list;
struct list_head iova_list;
struct vfio_domain *external_domain; /* domain for external user */
struct mutex lock;
struct rb_root dma_list;
struct blocking_notifier_head notifier;
@ -78,6 +77,7 @@ struct vfio_iommu {
bool nesting;
bool dirty_page_tracking;
bool container_open;
struct list_head emulated_iommu_groups;
};
struct vfio_domain {
@ -113,7 +113,6 @@ struct vfio_batch {
struct vfio_iommu_group {
struct iommu_group *iommu_group;
struct list_head next;
bool mdev_group; /* An mdev group */
bool pinned_page_dirty_scope;
};
@ -140,9 +139,6 @@ struct vfio_regions {
size_t len;
};
#define IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu) \
(!list_empty(&iommu->domain_list))
#define DIRTY_BITMAP_BYTES(n) (ALIGN(n, BITS_PER_TYPE(u64)) / BITS_PER_BYTE)
/*
@ -880,7 +876,7 @@ static int vfio_iommu_type1_pin_pages(void *iommu_data,
* already pinned and accounted. Accounting should be done if there is no
* iommu capable domain in the container.
*/
do_accounting = !IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu);
do_accounting = list_empty(&iommu->domain_list);
for (i = 0; i < npage; i++) {
struct vfio_pfn *vpfn;
@ -969,7 +965,7 @@ static int vfio_iommu_type1_unpin_pages(void *iommu_data,
mutex_lock(&iommu->lock);
do_accounting = !IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu);
do_accounting = list_empty(&iommu->domain_list);
for (i = 0; i < npage; i++) {
struct vfio_dma *dma;
dma_addr_t iova;
@ -1090,7 +1086,7 @@ static long vfio_unmap_unpin(struct vfio_iommu *iommu, struct vfio_dma *dma,
if (!dma->size)
return 0;
if (!IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu))
if (list_empty(&iommu->domain_list))
return 0;
/*
@ -1667,7 +1663,7 @@ static int vfio_dma_do_map(struct vfio_iommu *iommu,
vfio_link_dma(iommu, dma);
/* Don't pin and map if container doesn't contain IOMMU capable domain*/
if (!IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu))
if (list_empty(&iommu->domain_list))
dma->size = size;
else
ret = vfio_pin_map_dma(iommu, dma, size);
@ -1893,8 +1889,8 @@ static struct vfio_iommu_group*
vfio_iommu_find_iommu_group(struct vfio_iommu *iommu,
struct iommu_group *iommu_group)
{
struct vfio_iommu_group *group;
struct vfio_domain *domain;
struct vfio_iommu_group *group = NULL;
list_for_each_entry(domain, &iommu->domain_list, next) {
group = find_iommu_group(domain, iommu_group);
@ -1902,10 +1898,10 @@ vfio_iommu_find_iommu_group(struct vfio_iommu *iommu,
return group;
}
if (iommu->external_domain)
group = find_iommu_group(iommu->external_domain, iommu_group);
return group;
list_for_each_entry(group, &iommu->emulated_iommu_groups, next)
if (group->iommu_group == iommu_group)
return group;
return NULL;
}
static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions,
@ -1934,89 +1930,6 @@ static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions,
return ret;
}
static int vfio_mdev_attach_domain(struct device *dev, void *data)
{
struct mdev_device *mdev = to_mdev_device(dev);
struct iommu_domain *domain = data;
struct device *iommu_device;
iommu_device = mdev_get_iommu_device(mdev);
if (iommu_device) {
if (iommu_dev_feature_enabled(iommu_device, IOMMU_DEV_FEAT_AUX))
return iommu_aux_attach_device(domain, iommu_device);
else
return iommu_attach_device(domain, iommu_device);
}
return -EINVAL;
}
static int vfio_mdev_detach_domain(struct device *dev, void *data)
{
struct mdev_device *mdev = to_mdev_device(dev);
struct iommu_domain *domain = data;
struct device *iommu_device;
iommu_device = mdev_get_iommu_device(mdev);
if (iommu_device) {
if (iommu_dev_feature_enabled(iommu_device, IOMMU_DEV_FEAT_AUX))
iommu_aux_detach_device(domain, iommu_device);
else
iommu_detach_device(domain, iommu_device);
}
return 0;
}
static int vfio_iommu_attach_group(struct vfio_domain *domain,
struct vfio_iommu_group *group)
{
if (group->mdev_group)
return iommu_group_for_each_dev(group->iommu_group,
domain->domain,
vfio_mdev_attach_domain);
else
return iommu_attach_group(domain->domain, group->iommu_group);
}
static void vfio_iommu_detach_group(struct vfio_domain *domain,
struct vfio_iommu_group *group)
{
if (group->mdev_group)
iommu_group_for_each_dev(group->iommu_group, domain->domain,
vfio_mdev_detach_domain);
else
iommu_detach_group(domain->domain, group->iommu_group);
}
static bool vfio_bus_is_mdev(struct bus_type *bus)
{
struct bus_type *mdev_bus;
bool ret = false;
mdev_bus = symbol_get(mdev_bus_type);
if (mdev_bus) {
ret = (bus == mdev_bus);
symbol_put(mdev_bus_type);
}
return ret;
}
static int vfio_mdev_iommu_device(struct device *dev, void *data)
{
struct mdev_device *mdev = to_mdev_device(dev);
struct device **old = data, *new;
new = mdev_get_iommu_device(mdev);
if (!new || (*old && *old != new))
return -EINVAL;
*old = new;
return 0;
}
/*
* This is a helper function to insert an address range to iova list.
* The list is initially created with a single entry corresponding to
@ -2241,81 +2154,58 @@ static void vfio_iommu_iova_insert_copy(struct vfio_iommu *iommu,
}
static int vfio_iommu_type1_attach_group(void *iommu_data,
struct iommu_group *iommu_group)
struct iommu_group *iommu_group, enum vfio_group_type type)
{
struct vfio_iommu *iommu = iommu_data;
struct vfio_iommu_group *group;
struct vfio_domain *domain, *d;
struct bus_type *bus = NULL;
int ret;
bool resv_msi, msi_remap;
phys_addr_t resv_msi_base = 0;
struct iommu_domain_geometry *geo;
LIST_HEAD(iova_copy);
LIST_HEAD(group_resv_regions);
int ret = -EINVAL;
mutex_lock(&iommu->lock);
/* Check for duplicates */
if (vfio_iommu_find_iommu_group(iommu, iommu_group)) {
mutex_unlock(&iommu->lock);
return -EINVAL;
}
if (vfio_iommu_find_iommu_group(iommu, iommu_group))
goto out_unlock;
ret = -ENOMEM;
group = kzalloc(sizeof(*group), GFP_KERNEL);
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!group || !domain) {
ret = -ENOMEM;
goto out_free;
}
if (!group)
goto out_unlock;
group->iommu_group = iommu_group;
if (type == VFIO_EMULATED_IOMMU) {
list_add(&group->next, &iommu->emulated_iommu_groups);
/*
* An emulated IOMMU group cannot dirty memory directly, it can
* only use interfaces that provide dirty tracking.
* The iommu scope can only be promoted with the addition of a
* dirty tracking group.
*/
group->pinned_page_dirty_scope = true;
ret = 0;
goto out_unlock;
}
/* Determine bus_type in order to allocate a domain */
ret = iommu_group_for_each_dev(iommu_group, &bus, vfio_bus_type);
if (ret)
goto out_free;
goto out_free_group;
if (vfio_bus_is_mdev(bus)) {
struct device *iommu_device = NULL;
group->mdev_group = true;
/* Determine the isolation type */
ret = iommu_group_for_each_dev(iommu_group, &iommu_device,
vfio_mdev_iommu_device);
if (ret || !iommu_device) {
if (!iommu->external_domain) {
INIT_LIST_HEAD(&domain->group_list);
iommu->external_domain = domain;
vfio_update_pgsize_bitmap(iommu);
} else {
kfree(domain);
}
list_add(&group->next,
&iommu->external_domain->group_list);
/*
* Non-iommu backed group cannot dirty memory directly,
* it can only use interfaces that provide dirty
* tracking.
* The iommu scope can only be promoted with the
* addition of a dirty tracking group.
*/
group->pinned_page_dirty_scope = true;
mutex_unlock(&iommu->lock);
return 0;
}
bus = iommu_device->bus;
}
ret = -ENOMEM;
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
goto out_free_group;
ret = -EIO;
domain->domain = iommu_domain_alloc(bus);
if (!domain->domain) {
ret = -EIO;
goto out_free;
}
if (!domain->domain)
goto out_free_domain;
if (iommu->nesting) {
ret = iommu_enable_nesting(domain->domain);
@ -2323,7 +2213,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
goto out_domain;
}
ret = vfio_iommu_attach_group(domain, group);
ret = iommu_attach_group(domain->domain, group->iommu_group);
if (ret)
goto out_domain;
@ -2390,15 +2280,17 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
list_for_each_entry(d, &iommu->domain_list, next) {
if (d->domain->ops == domain->domain->ops &&
d->prot == domain->prot) {
vfio_iommu_detach_group(domain, group);
if (!vfio_iommu_attach_group(d, group)) {
iommu_detach_group(domain->domain, group->iommu_group);
if (!iommu_attach_group(d->domain,
group->iommu_group)) {
list_add(&group->next, &d->group_list);
iommu_domain_free(domain->domain);
kfree(domain);
goto done;
}
ret = vfio_iommu_attach_group(domain, group);
ret = iommu_attach_group(domain->domain,
group->iommu_group);
if (ret)
goto out_domain;
}
@ -2435,14 +2327,16 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
return 0;
out_detach:
vfio_iommu_detach_group(domain, group);
iommu_detach_group(domain->domain, group->iommu_group);
out_domain:
iommu_domain_free(domain->domain);
vfio_iommu_iova_free(&iova_copy);
vfio_iommu_resv_free(&group_resv_regions);
out_free:
out_free_domain:
kfree(domain);
out_free_group:
kfree(group);
out_unlock:
mutex_unlock(&iommu->lock);
return ret;
}
@ -2567,25 +2461,19 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
LIST_HEAD(iova_copy);
mutex_lock(&iommu->lock);
list_for_each_entry(group, &iommu->emulated_iommu_groups, next) {
if (group->iommu_group != iommu_group)
continue;
update_dirty_scope = !group->pinned_page_dirty_scope;
list_del(&group->next);
kfree(group);
if (iommu->external_domain) {
group = find_iommu_group(iommu->external_domain, iommu_group);
if (group) {
update_dirty_scope = !group->pinned_page_dirty_scope;
list_del(&group->next);
kfree(group);
if (list_empty(&iommu->external_domain->group_list)) {
if (!IS_IOMMU_CAP_DOMAIN_IN_CONTAINER(iommu)) {
WARN_ON(iommu->notifier.head);
vfio_iommu_unmap_unpin_all(iommu);
}
kfree(iommu->external_domain);
iommu->external_domain = NULL;
}
goto detach_group_done;
if (list_empty(&iommu->emulated_iommu_groups) &&
list_empty(&iommu->domain_list)) {
WARN_ON(iommu->notifier.head);
vfio_iommu_unmap_unpin_all(iommu);
}
goto detach_group_done;
}
/*
@ -2600,7 +2488,7 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
if (!group)
continue;
vfio_iommu_detach_group(domain, group);
iommu_detach_group(domain->domain, group->iommu_group);
update_dirty_scope = !group->pinned_page_dirty_scope;
list_del(&group->next);
kfree(group);
@ -2613,7 +2501,7 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
*/
if (list_empty(&domain->group_list)) {
if (list_is_singular(&iommu->domain_list)) {
if (!iommu->external_domain) {
if (list_empty(&iommu->emulated_iommu_groups)) {
WARN_ON(iommu->notifier.head);
vfio_iommu_unmap_unpin_all(iommu);
} else {
@ -2677,41 +2565,43 @@ static void *vfio_iommu_type1_open(unsigned long arg)
mutex_init(&iommu->lock);
BLOCKING_INIT_NOTIFIER_HEAD(&iommu->notifier);
init_waitqueue_head(&iommu->vaddr_wait);
iommu->pgsize_bitmap = PAGE_MASK;
INIT_LIST_HEAD(&iommu->emulated_iommu_groups);
return iommu;
}
static void vfio_release_domain(struct vfio_domain *domain, bool external)
static void vfio_release_domain(struct vfio_domain *domain)
{
struct vfio_iommu_group *group, *group_tmp;
list_for_each_entry_safe(group, group_tmp,
&domain->group_list, next) {
if (!external)
vfio_iommu_detach_group(domain, group);
iommu_detach_group(domain->domain, group->iommu_group);
list_del(&group->next);
kfree(group);
}
if (!external)
iommu_domain_free(domain->domain);
iommu_domain_free(domain->domain);
}
static void vfio_iommu_type1_release(void *iommu_data)
{
struct vfio_iommu *iommu = iommu_data;
struct vfio_domain *domain, *domain_tmp;
struct vfio_iommu_group *group, *next_group;
if (iommu->external_domain) {
vfio_release_domain(iommu->external_domain, true);
kfree(iommu->external_domain);
list_for_each_entry_safe(group, next_group,
&iommu->emulated_iommu_groups, next) {
list_del(&group->next);
kfree(group);
}
vfio_iommu_unmap_unpin_all(iommu);
list_for_each_entry_safe(domain, domain_tmp,
&iommu->domain_list, next) {
vfio_release_domain(domain, false);
vfio_release_domain(domain);
list_del(&domain->next);
kfree(domain);
}

14
include/linux/fsl/mc.h
View File

@ -620,6 +620,20 @@ int dpcon_reset(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token);
int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
u32 cmd_flags,
int obj_id,
char *obj_type,
u16 *token);
int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token);
int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token);
/**
* struct dpcon_attr - Structure representing DPCON attributes
* @id: DPCON object ID

20
include/linux/mdev.h
View File

@ -18,7 +18,6 @@ struct mdev_device {
void *driver_data;
struct list_head next;
struct mdev_type *type;
struct device *iommu_device;
bool active;
};
@ -27,25 +26,6 @@ static inline struct mdev_device *to_mdev_device(struct device *dev)
return container_of(dev, struct mdev_device, dev);
}
/*
* Called by the parent device driver to set the device which represents
* this mdev in iommu protection scope. By default, the iommu device is
* NULL, that indicates using vendor defined isolation.
*
* @dev: the mediated device that iommu will isolate.
* @iommu_device: a pci device which represents the iommu for @dev.
*/
static inline void mdev_set_iommu_device(struct mdev_device *mdev,
struct device *iommu_device)
{
mdev->iommu_device = iommu_device;
}
static inline struct device *mdev_get_iommu_device(struct mdev_device *mdev)
{
return mdev->iommu_device;
}
unsigned int mdev_get_type_group_id(struct mdev_device *mdev);
unsigned int mtype_get_type_group_id(struct mdev_type *mtype);
struct device *mtype_get_parent_dev(struct mdev_type *mtype);

53
include/linux/vfio.h
View File

@ -71,68 +71,17 @@ struct vfio_device_ops {
int (*match)(struct vfio_device *vdev, char *buf);
};
extern struct iommu_group *vfio_iommu_group_get(struct device *dev);
extern void vfio_iommu_group_put(struct iommu_group *group, struct device *dev);
void vfio_init_group_dev(struct vfio_device *device, struct device *dev,
const struct vfio_device_ops *ops);
void vfio_uninit_group_dev(struct vfio_device *device);
int vfio_register_group_dev(struct vfio_device *device);
int vfio_register_emulated_iommu_dev(struct vfio_device *device);
void vfio_unregister_group_dev(struct vfio_device *device);
extern struct vfio_device *vfio_device_get_from_dev(struct device *dev);
extern void vfio_device_put(struct vfio_device *device);
int vfio_assign_device_set(struct vfio_device *device, void *set_id);
/* events for the backend driver notify callback */
enum vfio_iommu_notify_type {
VFIO_IOMMU_CONTAINER_CLOSE = 0,
};
/**
* struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
*/
struct vfio_iommu_driver_ops {
char *name;
struct module *owner;
void *(*open)(unsigned long arg);
void (*release)(void *iommu_data);
ssize_t (*read)(void *iommu_data, char __user *buf,
size_t count, loff_t *ppos);
ssize_t (*write)(void *iommu_data, const char __user *buf,
size_t count, loff_t *size);
long (*ioctl)(void *iommu_data, unsigned int cmd,
unsigned long arg);
int (*mmap)(void *iommu_data, struct vm_area_struct *vma);
int (*attach_group)(void *iommu_data,
struct iommu_group *group);
void (*detach_group)(void *iommu_data,
struct iommu_group *group);
int (*pin_pages)(void *iommu_data,
struct iommu_group *group,
unsigned long *user_pfn,
int npage, int prot,
unsigned long *phys_pfn);
int (*unpin_pages)(void *iommu_data,
unsigned long *user_pfn, int npage);
int (*register_notifier)(void *iommu_data,
unsigned long *events,
struct notifier_block *nb);
int (*unregister_notifier)(void *iommu_data,
struct notifier_block *nb);
int (*dma_rw)(void *iommu_data, dma_addr_t user_iova,
void *data, size_t count, bool write);
struct iommu_domain *(*group_iommu_domain)(void *iommu_data,
struct iommu_group *group);
void (*notify)(void *iommu_data,
enum vfio_iommu_notify_type event);
};
extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
extern void vfio_unregister_iommu_driver(
const struct vfio_iommu_driver_ops *ops);
/*
* External user API
*/

2
samples/vfio-mdev/mbochs.c
View File

@ -553,7 +553,7 @@ static int mbochs_probe(struct mdev_device *mdev)
mbochs_create_config_space(mdev_state);
mbochs_reset(mdev_state);
ret = vfio_register_group_dev(&mdev_state->vdev);
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
goto err_mem;
dev_set_drvdata(&mdev->dev, mdev_state);

2
samples/vfio-mdev/mdpy.c
View File

@ -258,7 +258,7 @@ static int mdpy_probe(struct mdev_device *mdev)
mdpy_count++;
ret = vfio_register_group_dev(&mdev_state->vdev);
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
goto err_mem;
dev_set_drvdata(&mdev->dev, mdev_state);

2
samples/vfio-mdev/mtty.c
View File

@ -741,7 +741,7 @@ static int mtty_probe(struct mdev_device *mdev)
mtty_create_config_space(mdev_state);
ret = vfio_register_group_dev(&mdev_state->vdev);
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
goto err_vconfig;
dev_set_drvdata(&mdev->dev, mdev_state);