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-rw-r--r--drivers/vfio/Kconfig6
-rw-r--r--drivers/vfio/mdev/mdev_core.c14
-rw-r--r--drivers/vfio/vfio.c11
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c3
-rw-r--r--drivers/vfio/vfio_iommu_type1.c43
5 files changed, 49 insertions, 28 deletions
diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index 23eced02aaf6..c84333eb5eb5 100644
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -6,12 +6,12 @@ config VFIO_IOMMU_TYPE1
config VFIO_IOMMU_SPAPR_TCE
tristate
depends on VFIO && SPAPR_TCE_IOMMU
- default n
+ default VFIO
config VFIO_SPAPR_EEH
tristate
depends on EEH && VFIO_IOMMU_SPAPR_TCE
- default n
+ default VFIO
config VFIO_VIRQFD
tristate
@@ -22,8 +22,6 @@ menuconfig VFIO
tristate "VFIO Non-Privileged userspace driver framework"
depends on IOMMU_API
select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU || ARM_SMMU_V3)
- select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
- select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)
select ANON_INODES
help
VFIO provides a framework for secure userspace device drivers.
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 36d75c367d22..126991046eb7 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -422,18 +422,7 @@ int mdev_device_remove(struct device *dev, bool force_remove)
static int __init mdev_init(void)
{
- int ret;
-
- ret = mdev_bus_register();
-
- /*
- * Attempt to load known vfio_mdev. This gives us a working environment
- * without the user needing to explicitly load vfio_mdev driver.
- */
- if (!ret)
- request_module_nowait("vfio_mdev");
-
- return ret;
+ return mdev_bus_register();
}
static void __exit mdev_exit(void)
@@ -451,3 +440,4 @@ MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_SOFTDEP("post: vfio_mdev");
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 9901c4671e2f..609f4f982c74 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1917,7 +1917,7 @@ EXPORT_SYMBOL(vfio_set_irqs_validate_and_prepare);
* Pin a set of guest PFNs and return their associated host PFNs for local
* domain only.
* @dev [in] : device
- * @user_pfn [in]: array of user/guest PFNs to be unpinned.
+ * @user_pfn [in]: array of user/guest PFNs to be pinned.
* @npage [in] : count of elements in user_pfn array. This count should not
* be greater VFIO_PIN_PAGES_MAX_ENTRIES.
* @prot [in] : protection flags
@@ -2250,14 +2250,6 @@ static int __init vfio_init(void)
pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
- /*
- * Attempt to load known iommu-drivers. This gives us a working
- * environment without the user needing to explicitly load iommu
- * drivers.
- */
- request_module_nowait("vfio_iommu_type1");
- request_module_nowait("vfio_iommu_spapr_tce");
-
#ifdef CONFIG_VFIO_NOIOMMU
vfio_register_iommu_driver(&vfio_noiommu_ops);
#endif
@@ -2297,3 +2289,4 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS_MISCDEV(VFIO_MINOR);
MODULE_ALIAS("devname:vfio/vfio");
+MODULE_SOFTDEP("post: vfio_iommu_type1 vfio_iommu_spapr_tce");
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 59b3f62a2d64..cf3de91fbfe7 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -20,6 +20,9 @@
#include <linux/err.h>
#include <linux/vfio.h>
#include <linux/vmalloc.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/signal.h>
+
#include <asm/iommu.h>
#include <asm/tce.h>
#include <asm/mmu_context.h>
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index b3cc33fa6d26..c26fa1f3ed86 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -31,13 +31,16 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/rbtree.h>
-#include <linux/sched.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/mm.h>
#include <linux/slab.h>
#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>
#define DRIVER_VERSION "0.2"
#define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>"
@@ -1179,6 +1182,28 @@ static struct vfio_group *find_iommu_group(struct vfio_domain *domain,
return NULL;
}
+static bool vfio_iommu_has_resv_msi(struct iommu_group *group,
+ phys_addr_t *base)
+{
+ struct list_head group_resv_regions;
+ struct iommu_resv_region *region, *next;
+ bool ret = false;
+
+ INIT_LIST_HEAD(&group_resv_regions);
+ iommu_get_group_resv_regions(group, &group_resv_regions);
+ list_for_each_entry(region, &group_resv_regions, list) {
+ if (region->type & IOMMU_RESV_MSI) {
+ *base = region->start;
+ ret = true;
+ goto out;
+ }
+ }
+out:
+ list_for_each_entry_safe(region, next, &group_resv_regions, list)
+ kfree(region);
+ return ret;
+}
+
static int vfio_iommu_type1_attach_group(void *iommu_data,
struct iommu_group *iommu_group)
{
@@ -1187,6 +1212,8 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
struct vfio_domain *domain, *d;
struct bus_type *bus = NULL, *mdev_bus;
int ret;
+ bool resv_msi, msi_remap;
+ phys_addr_t resv_msi_base;
mutex_lock(&iommu->lock);
@@ -1256,11 +1283,15 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
if (ret)
goto out_domain;
+ resv_msi = vfio_iommu_has_resv_msi(iommu_group, &resv_msi_base);
+
INIT_LIST_HEAD(&domain->group_list);
list_add(&group->next, &domain->group_list);
- if (!allow_unsafe_interrupts &&
- !iommu_capable(bus, IOMMU_CAP_INTR_REMAP)) {
+ msi_remap = resv_msi ? irq_domain_check_msi_remap() :
+ iommu_capable(bus, IOMMU_CAP_INTR_REMAP);
+
+ if (!allow_unsafe_interrupts && !msi_remap) {
pr_warn("%s: No interrupt remapping support. Use the module param \"allow_unsafe_interrupts\" to enable VFIO IOMMU support on this platform\n",
__func__);
ret = -EPERM;
@@ -1302,6 +1333,12 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
if (ret)
goto out_detach;
+ if (resv_msi) {
+ ret = iommu_get_msi_cookie(domain->domain, resv_msi_base);
+ if (ret)
+ goto out_detach;
+ }
+
list_add(&domain->next, &iommu->domain_list);
mutex_unlock(&iommu->lock);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 00:03:49 +0100