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-rw-r--r--drivers/vfio/mdev/mdev_core.c16
-rw-r--r--drivers/vfio/mdev/mdev_private.h5
-rw-r--r--drivers/vfio/mdev/mdev_sysfs.c6
-rw-r--r--drivers/vfio/pci/vfio_pci.c90
-rw-r--r--drivers/vfio/pci/vfio_pci_config.c2
-rw-r--r--drivers/vfio/pci/vfio_pci_private.h6
-rw-r--r--drivers/vfio/platform/reset/Makefile2
-rw-r--r--drivers/vfio/platform/reset/vfio_platform_amdxgbe.c2
-rw-r--r--drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c2
-rw-r--r--drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c2
-rw-r--r--drivers/vfio/vfio.c8
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c3
12 files changed, 107 insertions, 37 deletions
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 0212f0ee8aea..b96fedc77ee5 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -60,9 +60,9 @@ struct mdev_device *mdev_from_dev(struct device *dev)
}
EXPORT_SYMBOL(mdev_from_dev);
-uuid_le mdev_uuid(struct mdev_device *mdev)
+const guid_t *mdev_uuid(struct mdev_device *mdev)
{
- return mdev->uuid;
+ return &mdev->uuid;
}
EXPORT_SYMBOL(mdev_uuid);
@@ -88,8 +88,7 @@ static void mdev_release_parent(struct kref *kref)
put_device(dev);
}
-static
-inline struct mdev_parent *mdev_get_parent(struct mdev_parent *parent)
+static inline struct mdev_parent *mdev_get_parent(struct mdev_parent *parent)
{
if (parent)
kref_get(&parent->ref);
@@ -276,7 +275,8 @@ static void mdev_device_release(struct device *dev)
kfree(mdev);
}
-int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
+int mdev_device_create(struct kobject *kobj,
+ struct device *dev, const guid_t *uuid)
{
int ret;
struct mdev_device *mdev, *tmp;
@@ -291,7 +291,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
/* Check for duplicate */
list_for_each_entry(tmp, &mdev_list, next) {
- if (!uuid_le_cmp(tmp->uuid, uuid)) {
+ if (guid_equal(&tmp->uuid, uuid)) {
mutex_unlock(&mdev_list_lock);
ret = -EEXIST;
goto mdev_fail;
@@ -305,7 +305,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
goto mdev_fail;
}
- memcpy(&mdev->uuid, &uuid, sizeof(uuid_le));
+ guid_copy(&mdev->uuid, uuid);
list_add(&mdev->next, &mdev_list);
mutex_unlock(&mdev_list_lock);
@@ -315,7 +315,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
mdev->dev.parent = dev;
mdev->dev.bus = &mdev_bus_type;
mdev->dev.release = mdev_device_release;
- dev_set_name(&mdev->dev, "%pUl", uuid.b);
+ dev_set_name(&mdev->dev, "%pUl", uuid);
ret = device_register(&mdev->dev);
if (ret) {
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index b5819b7d7ef7..379758c52b1b 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -28,7 +28,7 @@ struct mdev_parent {
struct mdev_device {
struct device dev;
struct mdev_parent *parent;
- uuid_le uuid;
+ guid_t uuid;
void *driver_data;
struct kref ref;
struct list_head next;
@@ -58,7 +58,8 @@ void parent_remove_sysfs_files(struct mdev_parent *parent);
int mdev_create_sysfs_files(struct device *dev, struct mdev_type *type);
void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type);
-int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid);
+int mdev_device_create(struct kobject *kobj,
+ struct device *dev, const guid_t *uuid);
int mdev_device_remove(struct device *dev, bool force_remove);
#endif /* MDEV_PRIVATE_H */
diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c
index ce5dd219f2c8..5193a0e0ce5a 100644
--- a/drivers/vfio/mdev/mdev_sysfs.c
+++ b/drivers/vfio/mdev/mdev_sysfs.c
@@ -55,7 +55,7 @@ static ssize_t create_store(struct kobject *kobj, struct device *dev,
const char *buf, size_t count)
{
char *str;
- uuid_le uuid;
+ guid_t uuid;
int ret;
if ((count < UUID_STRING_LEN) || (count > UUID_STRING_LEN + 1))
@@ -65,12 +65,12 @@ static ssize_t create_store(struct kobject *kobj, struct device *dev,
if (!str)
return -ENOMEM;
- ret = uuid_le_to_bin(str, &uuid);
+ ret = guid_parse(str, &uuid);
kfree(str);
if (ret)
return ret;
- ret = mdev_device_create(kobj, dev, uuid);
+ ret = mdev_device_create(kobj, dev, &uuid);
if (ret)
return ret;
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index ff60bd1ea587..a25659b5a5d1 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -209,6 +209,57 @@ static bool vfio_pci_nointx(struct pci_dev *pdev)
return false;
}
+static void vfio_pci_probe_power_state(struct vfio_pci_device *vdev)
+{
+ struct pci_dev *pdev = vdev->pdev;
+ u16 pmcsr;
+
+ if (!pdev->pm_cap)
+ return;
+
+ pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &pmcsr);
+
+ vdev->needs_pm_restore = !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET);
+}
+
+/*
+ * pci_set_power_state() wrapper handling devices which perform a soft reset on
+ * D3->D0 transition. Save state prior to D0/1/2->D3, stash it on the vdev,
+ * restore when returned to D0. Saved separately from pci_saved_state for use
+ * by PM capability emulation and separately from pci_dev internal saved state
+ * to avoid it being overwritten and consumed around other resets.
+ */
+int vfio_pci_set_power_state(struct vfio_pci_device *vdev, pci_power_t state)
+{
+ struct pci_dev *pdev = vdev->pdev;
+ bool needs_restore = false, needs_save = false;
+ int ret;
+
+ if (vdev->needs_pm_restore) {
+ if (pdev->current_state < PCI_D3hot && state >= PCI_D3hot) {
+ pci_save_state(pdev);
+ needs_save = true;
+ }
+
+ if (pdev->current_state >= PCI_D3hot && state <= PCI_D0)
+ needs_restore = true;
+ }
+
+ ret = pci_set_power_state(pdev, state);
+
+ if (!ret) {
+ /* D3 might be unsupported via quirk, skip unless in D3 */
+ if (needs_save && pdev->current_state >= PCI_D3hot) {
+ vdev->pm_save = pci_store_saved_state(pdev);
+ } else if (needs_restore) {
+ pci_load_and_free_saved_state(pdev, &vdev->pm_save);
+ pci_restore_state(pdev);
+ }
+ }
+
+ return ret;
+}
+
static int vfio_pci_enable(struct vfio_pci_device *vdev)
{
struct pci_dev *pdev = vdev->pdev;
@@ -216,7 +267,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
u16 cmd;
u8 msix_pos;
- pci_set_power_state(pdev, PCI_D0);
+ vfio_pci_set_power_state(vdev, PCI_D0);
/* Don't allow our initial saved state to include busmaster */
pci_clear_master(pdev);
@@ -407,7 +458,7 @@ out:
vfio_pci_try_bus_reset(vdev);
if (!disable_idle_d3)
- pci_set_power_state(pdev, PCI_D3hot);
+ vfio_pci_set_power_state(vdev, PCI_D3hot);
}
static void vfio_pci_release(void *device_data)
@@ -708,6 +759,7 @@ static long vfio_pci_ioctl(void *device_data,
{
void __iomem *io;
size_t size;
+ u16 orig_cmd;
info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
info.flags = 0;
@@ -723,15 +775,23 @@ static long vfio_pci_ioctl(void *device_data,
break;
}
- /* Is it really there? */
+ /*
+ * Is it really there? Enable memory decode for
+ * implicit access in pci_map_rom().
+ */
+ pci_read_config_word(pdev, PCI_COMMAND, &orig_cmd);
+ pci_write_config_word(pdev, PCI_COMMAND,
+ orig_cmd | PCI_COMMAND_MEMORY);
+
io = pci_map_rom(pdev, &size);
- if (!io || !size) {
+ if (io) {
+ info.flags = VFIO_REGION_INFO_FLAG_READ;
+ pci_unmap_rom(pdev, io);
+ } else {
info.size = 0;
- break;
}
- pci_unmap_rom(pdev, io);
- info.flags = VFIO_REGION_INFO_FLAG_READ;
+ pci_write_config_word(pdev, PCI_COMMAND, orig_cmd);
break;
}
case VFIO_PCI_VGA_REGION_INDEX:
@@ -1286,6 +1346,8 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
vfio_pci_set_vga_decode(vdev, false));
}
+ vfio_pci_probe_power_state(vdev);
+
if (!disable_idle_d3) {
/*
* pci-core sets the device power state to an unknown value at
@@ -1296,8 +1358,8 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
* be able to get to D3. Therefore first do a D0 transition
* before going to D3.
*/
- pci_set_power_state(pdev, PCI_D0);
- pci_set_power_state(pdev, PCI_D3hot);
+ vfio_pci_set_power_state(vdev, PCI_D0);
+ vfio_pci_set_power_state(vdev, PCI_D3hot);
}
return ret;
@@ -1316,6 +1378,11 @@ static void vfio_pci_remove(struct pci_dev *pdev)
vfio_iommu_group_put(pdev->dev.iommu_group, &pdev->dev);
kfree(vdev->region);
mutex_destroy(&vdev->ioeventfds_lock);
+
+ if (!disable_idle_d3)
+ vfio_pci_set_power_state(vdev, PCI_D0);
+
+ kfree(vdev->pm_save);
kfree(vdev);
if (vfio_pci_is_vga(pdev)) {
@@ -1324,9 +1391,6 @@ static void vfio_pci_remove(struct pci_dev *pdev)
VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM |
VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM);
}
-
- if (!disable_idle_d3)
- pci_set_power_state(pdev, PCI_D0);
}
static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
@@ -1551,7 +1615,7 @@ put_devs:
tmp->needs_reset = false;
if (tmp != vdev && !disable_idle_d3)
- pci_set_power_state(tmp->pdev, PCI_D3hot);
+ vfio_pci_set_power_state(tmp, PCI_D3hot);
}
vfio_device_put(devs.devices[i]);
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index 423ea1f98441..e82b51114687 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -691,7 +691,7 @@ static int vfio_pm_config_write(struct vfio_pci_device *vdev, int pos,
break;
}
- pci_set_power_state(vdev->pdev, state);
+ vfio_pci_set_power_state(vdev, state);
}
return count;
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index 8c0009f00818..1812cf22fc4f 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -114,7 +114,9 @@ struct vfio_pci_device {
bool has_vga;
bool needs_reset;
bool nointx;
+ bool needs_pm_restore;
struct pci_saved_state *pci_saved_state;
+ struct pci_saved_state *pm_save;
struct vfio_pci_reflck *reflck;
int refcnt;
int ioeventfds_nr;
@@ -161,6 +163,10 @@ extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
unsigned int type, unsigned int subtype,
const struct vfio_pci_regops *ops,
size_t size, u32 flags, void *data);
+
+extern int vfio_pci_set_power_state(struct vfio_pci_device *vdev,
+ pci_power_t state);
+
#ifdef CONFIG_VFIO_PCI_IGD
extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
#else
diff --git a/drivers/vfio/platform/reset/Makefile b/drivers/vfio/platform/reset/Makefile
index 57abd4f0ac5b..7294c5ea122e 100644
--- a/drivers/vfio/platform/reset/Makefile
+++ b/drivers/vfio/platform/reset/Makefile
@@ -2,8 +2,6 @@
vfio-platform-calxedaxgmac-y := vfio_platform_calxedaxgmac.o
vfio-platform-amdxgbe-y := vfio_platform_amdxgbe.o
-ccflags-y += -Idrivers/vfio/platform
-
obj-$(CONFIG_VFIO_PLATFORM_CALXEDAXGMAC_RESET) += vfio-platform-calxedaxgmac.o
obj-$(CONFIG_VFIO_PLATFORM_AMDXGBE_RESET) += vfio-platform-amdxgbe.o
obj-$(CONFIG_VFIO_PLATFORM_BCMFLEXRM_RESET) += vfio_platform_bcmflexrm.o
diff --git a/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c b/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c
index bcd419cfd79c..3ddb2704221d 100644
--- a/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c
+++ b/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c
@@ -25,7 +25,7 @@
#include <uapi/linux/mdio.h>
#include <linux/delay.h>
-#include "vfio_platform_private.h"
+#include "../vfio_platform_private.h"
#define DMA_MR 0x3000
#define MAC_VR 0x0110
diff --git a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
index d45c3be71198..16165a62b86d 100644
--- a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
+++ b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
@@ -23,7 +23,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include "vfio_platform_private.h"
+#include "../vfio_platform_private.h"
/* FlexRM configuration */
#define RING_REGS_SIZE 0x10000
diff --git a/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c b/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
index 49e5df6e8f29..e0356de5df54 100644
--- a/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
+++ b/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
@@ -24,7 +24,7 @@
#include <linux/init.h>
#include <linux/io.h>
-#include "vfio_platform_private.h"
+#include "../vfio_platform_private.h"
#define DRIVER_VERSION "0.1"
#define DRIVER_AUTHOR "Eric Auger <eric.auger@linaro.org>"
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 64833879f75d..a3030cdf3c18 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -2219,12 +2219,12 @@ static int __init vfio_init(void)
vfio.class->devnode = vfio_devnode;
- ret = alloc_chrdev_region(&vfio.group_devt, 0, MINORMASK, "vfio");
+ ret = alloc_chrdev_region(&vfio.group_devt, 0, MINORMASK + 1, "vfio");
if (ret)
goto err_alloc_chrdev;
cdev_init(&vfio.group_cdev, &vfio_group_fops);
- ret = cdev_add(&vfio.group_cdev, vfio.group_devt, MINORMASK);
+ ret = cdev_add(&vfio.group_cdev, vfio.group_devt, MINORMASK + 1);
if (ret)
goto err_cdev_add;
@@ -2236,7 +2236,7 @@ static int __init vfio_init(void)
return 0;
err_cdev_add:
- unregister_chrdev_region(vfio.group_devt, MINORMASK);
+ unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);
err_alloc_chrdev:
class_destroy(vfio.class);
vfio.class = NULL;
@@ -2254,7 +2254,7 @@ static void __exit vfio_cleanup(void)
#endif
idr_destroy(&vfio.group_idr);
cdev_del(&vfio.group_cdev);
- unregister_chrdev_region(vfio.group_devt, MINORMASK);
+ unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);
class_destroy(vfio.class);
vfio.class = NULL;
misc_deregister(&vfio_dev);
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index c424913324e3..8dbb270998f4 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1235,7 +1235,8 @@ static void tce_iommu_release_ownership_ddw(struct tce_container *container,
}
for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i)
- table_group->ops->unset_window(table_group, i);
+ if (container->tables[i])
+ table_group->ops->unset_window(table_group, i);
table_group->ops->release_ownership(table_group);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 10:55:09 +0000