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-rw-r--r--arch/s390/pci/pci_bus.c5
-rw-r--r--drivers/pci/iov.c1
-rw-r--r--drivers/vfio/pci/vfio_pci_config.c27
-rw-r--r--drivers/vfio/vfio.c9
-rw-r--r--drivers/vfio/vfio_iommu_type1.c20
-rw-r--r--include/linux/pci.h1
-rw-r--r--include/uapi/linux/vfio.h15
7 files changed, 63 insertions, 15 deletions
diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
index 5967f3014156..c93486a9989b 100644
--- a/arch/s390/pci/pci_bus.c
+++ b/arch/s390/pci/pci_bus.c
@@ -197,9 +197,10 @@ void pcibios_bus_add_device(struct pci_dev *pdev)
* With pdev->no_vf_scan the common PCI probing code does not
* perform PF/VF linking.
*/
- if (zdev->vfn)
+ if (zdev->vfn) {
zpci_bus_setup_virtfn(zdev->zbus, pdev, zdev->vfn);
-
+ pdev->no_command_memory = 1;
+ }
}
static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index b37e08c4f9d1..4afd4ee4f7f0 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -180,6 +180,7 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id)
virtfn->device = iov->vf_device;
virtfn->is_virtfn = 1;
virtfn->physfn = pci_dev_get(dev);
+ virtfn->no_command_memory = 1;
if (id == 0)
pci_read_vf_config_common(virtfn);
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index d98843feddce..a402adee8a21 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -406,7 +406,7 @@ bool __vfio_pci_memory_enabled(struct vfio_pci_device *vdev)
* PF SR-IOV capability, there's therefore no need to trigger
* faults based on the virtual value.
*/
- return pdev->is_virtfn || (cmd & PCI_COMMAND_MEMORY);
+ return pdev->no_command_memory || (cmd & PCI_COMMAND_MEMORY);
}
/*
@@ -467,6 +467,9 @@ static void vfio_bar_fixup(struct vfio_pci_device *vdev)
__le32 *vbar;
u64 mask;
+ if (!vdev->bardirty)
+ return;
+
vbar = (__le32 *)&vdev->vconfig[PCI_BASE_ADDRESS_0];
for (i = 0; i < PCI_STD_NUM_BARS; i++, vbar++) {
@@ -520,8 +523,8 @@ static int vfio_basic_config_read(struct vfio_pci_device *vdev, int pos,
count = vfio_default_config_read(vdev, pos, count, perm, offset, val);
- /* Mask in virtual memory enable for SR-IOV devices */
- if (offset == PCI_COMMAND && vdev->pdev->is_virtfn) {
+ /* Mask in virtual memory enable */
+ if (offset == PCI_COMMAND && vdev->pdev->no_command_memory) {
u16 cmd = le16_to_cpu(*(__le16 *)&vdev->vconfig[PCI_COMMAND]);
u32 tmp_val = le32_to_cpu(*val);
@@ -589,9 +592,11 @@ static int vfio_basic_config_write(struct vfio_pci_device *vdev, int pos,
* shows it disabled (phys_mem/io, then the device has
* undergone some kind of backdoor reset and needs to be
* restored before we allow it to enable the bars.
- * SR-IOV devices will trigger this, but we catch them later
+ * SR-IOV devices will trigger this - for mem enable let's
+ * catch this now and for io enable it will be caught later
*/
- if ((new_mem && virt_mem && !phys_mem) ||
+ if ((new_mem && virt_mem && !phys_mem &&
+ !pdev->no_command_memory) ||
(new_io && virt_io && !phys_io) ||
vfio_need_bar_restore(vdev))
vfio_bar_restore(vdev);
@@ -1734,12 +1739,14 @@ int vfio_config_init(struct vfio_pci_device *vdev)
vconfig[PCI_INTERRUPT_PIN]);
vconfig[PCI_INTERRUPT_PIN] = 0; /* Gratuitous for good VFs */
-
+ }
+ if (pdev->no_command_memory) {
/*
- * VFs do no implement the memory enable bit of the COMMAND
- * register therefore we'll not have it set in our initial
- * copy of config space after pci_enable_device(). For
- * consistency with PFs, set the virtual enable bit here.
+ * VFs and devices that set pdev->no_command_memory do not
+ * implement the memory enable bit of the COMMAND register
+ * therefore we'll not have it set in our initial copy of
+ * config space after pci_enable_device(). For consistency
+ * with PFs, set the virtual enable bit here.
*/
*(__le16 *)&vconfig[PCI_COMMAND] |=
cpu_to_le16(PCI_COMMAND_MEMORY);
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 262ab0efd06c..2151bc7f87ab 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1949,8 +1949,10 @@ int vfio_pin_pages(struct device *dev, unsigned long *user_pfn, int npage,
if (!group)
return -ENODEV;
- if (group->dev_counter > 1)
- return -EINVAL;
+ if (group->dev_counter > 1) {
+ ret = -EINVAL;
+ goto err_pin_pages;
+ }
ret = vfio_group_add_container_user(group);
if (ret)
@@ -2051,6 +2053,9 @@ int vfio_group_pin_pages(struct vfio_group *group,
if (!group || !user_iova_pfn || !phys_pfn || !npage)
return -EINVAL;
+ if (group->dev_counter > 1)
+ return -EINVAL;
+
if (npage > VFIO_PIN_PAGES_MAX_ENTRIES)
return -E2BIG;
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 5fbf0c1f7433..defd44522319 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -2609,6 +2609,20 @@ static int vfio_iommu_migration_build_caps(struct vfio_iommu *iommu,
return vfio_info_add_capability(caps, &cap_mig.header, sizeof(cap_mig));
}
+static int vfio_iommu_dma_avail_build_caps(struct vfio_iommu *iommu,
+ struct vfio_info_cap *caps)
+{
+ struct vfio_iommu_type1_info_dma_avail cap_dma_avail;
+
+ cap_dma_avail.header.id = VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL;
+ cap_dma_avail.header.version = 1;
+
+ cap_dma_avail.avail = iommu->dma_avail;
+
+ return vfio_info_add_capability(caps, &cap_dma_avail.header,
+ sizeof(cap_dma_avail));
+}
+
static int vfio_iommu_type1_get_info(struct vfio_iommu *iommu,
unsigned long arg)
{
@@ -2642,6 +2656,9 @@ static int vfio_iommu_type1_get_info(struct vfio_iommu *iommu,
ret = vfio_iommu_migration_build_caps(iommu, &caps);
if (!ret)
+ ret = vfio_iommu_dma_avail_build_caps(iommu, &caps);
+
+ if (!ret)
ret = vfio_iommu_iova_build_caps(iommu, &caps);
mutex_unlock(&iommu->lock);
@@ -2933,7 +2950,8 @@ static int vfio_iommu_type1_dma_rw_chunk(struct vfio_iommu *iommu,
* size
*/
bitmap_set(dma->bitmap, offset >> pgshift,
- *copied >> pgshift);
+ ((offset + *copied - 1) >> pgshift) -
+ (offset >> pgshift) + 1);
}
} else
*copied = copy_from_user(data, (void __user *)vaddr,
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 835530605c0d..3ff723124ca7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -445,6 +445,7 @@ struct pci_dev {
unsigned int is_probed:1; /* Device probing in progress */
unsigned int link_active_reporting:1;/* Device capable of reporting link active */
unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
+ unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index d4bd39e124bf..e7c8b3ac0818 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -1039,6 +1039,21 @@ struct vfio_iommu_type1_info_cap_migration {
__u64 max_dirty_bitmap_size; /* in bytes */
};
+/*
+ * The DMA available capability allows to report the current number of
+ * simultaneously outstanding DMA mappings that are allowed.
+ *
+ * The structure below defines version 1 of this capability.
+ *
+ * avail: specifies the current number of outstanding DMA mappings allowed.
+ */
+#define VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL 3
+
+struct vfio_iommu_type1_info_dma_avail {
+ struct vfio_info_cap_header header;
+ __u32 avail;
+};
+
#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
/**
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 10:02:16 +0000