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VFIO fixes for v5.12-rc4

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- Fix 32-bit issue with new unmap-all flag (Steve Sistare)
 
  - Various Kconfig changes for better coverage (Jason Gunthorpe)
 
  - Fix to batch pinning support (Daniel Jordan)
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Merge tag 'vfio-v5.12-rc4' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - Fix 32-bit issue with new unmap-all flag (Steve Sistare)

 - Various Kconfig changes for better coverage (Jason Gunthorpe)

 - Fix to batch pinning support (Daniel Jordan)

* tag 'vfio-v5.12-rc4' of git://github.com/awilliam/linux-vfio:
  vfio/type1: fix vaddr_get_pfns() return in vfio_pin_page_external()
  vfio: Depend on MMU
  ARM: amba: Allow some ARM_AMBA users to compile with COMPILE_TEST
  vfio-platform: Add COMPILE_TEST to VFIO_PLATFORM
  vfio: IOMMU_API should be selected
  vfio/type1: fix unmap all on ILP32
This commit is contained in:
Linus Torvalds 2021-03-18 12:37:05 -07:00
commit dc0337999d
4 changed files with 27 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/vfio/Kconfig
View File

@ -21,8 +21,8 @@ config VFIO_VIRQFD
menuconfig VFIO
tristate "VFIO Non-Privileged userspace driver framework"
depends on IOMMU_API
select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
select IOMMU_API
select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
help
VFIO provides a framework for secure userspace device drivers.
See Documentation/driver-api/vfio.rst for more details.

4
drivers/vfio/platform/Kconfig
View File

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config VFIO_PLATFORM
tristate "VFIO support for platform devices"
depends on VFIO && EVENTFD && (ARM || ARM64)
depends on VFIO && EVENTFD && (ARM || ARM64 || COMPILE_TEST)
select VFIO_VIRQFD
help
Support for platform devices with VFIO. This is required to make
@ -12,7 +12,7 @@ config VFIO_PLATFORM
config VFIO_AMBA
tristate "VFIO support for AMBA devices"
depends on VFIO_PLATFORM && ARM_AMBA
depends on VFIO_PLATFORM && (ARM_AMBA || COMPILE_TEST)
help
Support for ARM AMBA devices with VFIO. This is required to make
use of ARM AMBA devices present on the system using the VFIO

20
drivers/vfio/vfio_iommu_type1.c
View File

@ -189,7 +189,7 @@ static struct vfio_dma *vfio_find_dma(struct vfio_iommu *iommu,
}
static struct rb_node *vfio_find_dma_first_node(struct vfio_iommu *iommu,
dma_addr_t start, size_t size)
dma_addr_t start, u64 size)
{
struct rb_node *res = NULL;
struct rb_node *node = iommu->dma_list.rb_node;
@ -785,7 +785,12 @@ static int vfio_pin_page_external(struct vfio_dma *dma, unsigned long vaddr,
return -ENODEV;
ret = vaddr_get_pfns(mm, vaddr, 1, dma->prot, pfn_base, pages);
if (ret == 1 && do_accounting && !is_invalid_reserved_pfn(*pfn_base)) {
if (ret != 1)
goto out;
ret = 0;
if (do_accounting && !is_invalid_reserved_pfn(*pfn_base)) {
ret = vfio_lock_acct(dma, 1, true);
if (ret) {
put_pfn(*pfn_base, dma->prot);
@ -797,6 +802,7 @@ static int vfio_pin_page_external(struct vfio_dma *dma, unsigned long vaddr,
}
}
out:
mmput(mm);
return ret;
}
@ -1288,7 +1294,7 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
int ret = -EINVAL, retries = 0;
unsigned long pgshift;
dma_addr_t iova = unmap->iova;
unsigned long size = unmap->size;
u64 size = unmap->size;
bool unmap_all = unmap->flags & VFIO_DMA_UNMAP_FLAG_ALL;
bool invalidate_vaddr = unmap->flags & VFIO_DMA_UNMAP_FLAG_VADDR;
struct rb_node *n, *first_n;
@ -1304,14 +1310,12 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
if (unmap_all) {
if (iova || size)
goto unlock;
size = SIZE_MAX;
} else if (!size || size & (pgsize - 1)) {
size = U64_MAX;
} else if (!size || size & (pgsize - 1) ||
iova + size - 1 < iova || size > SIZE_MAX) {
goto unlock;
}
if (iova + size - 1 < iova || size > SIZE_MAX)
goto unlock;
/* When dirty tracking is enabled, allow only min supported pgsize */
if ((unmap->flags & VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP) &&
(!iommu->dirty_page_tracking || (bitmap->pgsize != pgsize))) {

11
include/linux/amba/bus.h
View File

@ -105,8 +105,19 @@ extern struct bus_type amba_bustype;
#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
#ifdef CONFIG_ARM_AMBA
int amba_driver_register(struct amba_driver *);
void amba_driver_unregister(struct amba_driver *);
#else
static inline int amba_driver_register(struct amba_driver *drv)
{
return -EINVAL;
}
static inline void amba_driver_unregister(struct amba_driver *drv)
{
}
#endif
struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);
void amba_device_put(struct amba_device *);
int amba_device_add(struct amba_device *, struct resource *);