.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v7:
* now memory is registered per mm (i.e. process)
* moved memory registration code to powerpc/mmu
* merged "vfio: powerpc/spapr: Define v2 IOMMU" into this
* limited new ioctls to v2 IOMMU
* updated doc
* unsupported ioclts return -ENOTTY
be calculated by platform code from DMA direction.
This moves SetPageDirty() to the IOMMU code to make it work for both
VFIO ioctl interface in in-kernel TCE acceleration (when it becomes
available later).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 17
The iommu_free_table helper release memory it is using (the TCE table and
@it_map) and release the iommu_table struct as well. We might not want
the very last step as we store iommu_table in parent structures.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch
iommu_table struct.
It contains userspace address, one per TCE entry. The table is only
allocated when the ownership over an IOMMU group is taken which means
it is only used from outside of the powernv code (such as VFIO).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h
.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 5 +++
arch/powerpc/platforms/powernv/pci-ioda.c | 54 +++
2 files changed, 59 insertions(+)
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index
the platform code, VFIO
unprograms and removes all the tables it created.
Old-style ownership is still supported allowing VFIO to run on older
P5IOC2 and IODA IO controllers.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* fixed commit log that VFIO removes tables before passing ownership
This makes use of the it_page_size from the iommu_table struct
as page size can differ.
This replaces missing IOMMU_PAGE_SHIFT macro in commented debug code
as recently introduced IOMMU_PAGE_XXX macros do not include
IOMMU_PAGE_SHIFT.
Signed-off-by: Alexey Kardashevskiy
Reviewed-by: David
compound_order() and compound_head() work correctly on non-huge
pages, there is no need for additional check whether the page is huge.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* the helper is simplified to one line
v4:
* s/tce_check_page_size/tce_page_is_contained/
---
drivers/vfio
only.
This removes page unpinning from iommu_take_ownership() as the actual
TCE table might contain garbage and doing put_page() on it is undefined
behaviour.
Besides the last part, the rest of the patch is mechanical.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* s/iommu_tce_build(tbl
On 03/17/2015 06:45 AM, Alex Williamson wrote:
On Fri, 2015-03-13 at 19:07 +1100, Alexey Kardashevskiy wrote:
The existing IOMMU requires VFIO_IOMMU_ENABLE call to enable actual use
of the container (i.e. call DMA map/unmap) and this is where we check
the rlimit for locked pages. It assumes
On 03/17/2015 06:38 AM, Alex Williamson wrote:
On Fri, 2015-03-13 at 19:07 +1100, Alexey Kardashevskiy wrote:
This adds create/remove window ioctls to create and remove DMA windows.
sPAPR defines a Dynamic DMA windows capability which allows
para-virtualized guests to create additional DMA
required for DDW
* PEs (IOMMU groups) are passed to VFIO with no DMA windows at all so
we do not bother with iommu_table::it_map anymore
* added multilevel TCE tables support to support really huge guests
v2:
* added missing __pa() in "powerpc/powernv: Release replaced TCE"
compound_order() and compound_head() work correctly on non-huge
pages, there is no need for additional check whether the page is huge.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* the helper is simplified to one line
v4:
* s/tce_check_page_size/tce_page_is_contained/
---
drivers/vfio
This makes use of the it_page_size from the iommu_table struct
as page size can differ.
This replaces missing IOMMU_PAGE_SHIFT macro in commented debug code
as recently introduced IOMMU_PAGE_XXX macros do not include
IOMMU_PAGE_SHIFT.
Signed-off-by: Alexey Kardashevskiy
Reviewed-by: David
The iommu_free_table helper release memory it is using (the TCE table and
@it_map) and release the iommu_table struct as well. We might not want
the very last step as we store iommu_table in parent structures.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch
This moves iommu_table creation to the beginning. This is a mechanical
patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 30 --
1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci
iommu table(s).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch/powerpc/kernel/iommu.c| 9 +
arch/powerpc/platforms/powernv/pci.c | 2 +-
arch/powerpc/platforms/pseries/iommu.c | 12
4 files changed, 15 insertions
else/more so let's give it
more generic name. The bool parameter is inverted.
The callback is implemented for IODA2 only. Other platforms (P5IOC2,
IODA1) will use the old iommu_take_ownership/iommu_release_ownership API.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/io
This is a part of moving TCE table allocation into an iommu_ops
callback to support multiple IOMMU groups per one VFIO container.
This enforce window size to be a power of two.
This is a pretty mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c
At the moment DMA map/unmap requests are handled irrespective to
the container's state. This allows the user space to pin memory which
it might not be allowed to pin.
This adds checks to MAP/UNMAP that the container is enabled, otherwise
-EPERM is returned.
Signed-off-by: Alexey Kardashe
This clears the TCE table when a container is being closed as this is
a good thing to leave the table clean before passing the ownership
back to the host kernel.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 14 +++---
1 file changed, 11 insertions(+), 3
This replaces iommu_take_ownership()/iommu_release_ownership() calls
with the callback calls and it is up to the platform code to call
iommu_take_ownership()/iommu_release_ownership() if needed.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 4 +--
arch/powerpc
it_map.
Clearing must be done outside of the table locks as iommu_clear_tce()
called from iommu_clear_tces_and_put_pages() does this.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v5:
* do not store bit#0 value, it has to be set for zero-based table
anyway
* removed test_and_clear_bit
---
arch
be calculated by platform code from DMA direction.
This moves SetPageDirty() to the IOMMU code to make it work for both
VFIO ioctl interface in in-kernel TCE acceleration (when it becomes
available later).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 15
supposed to be called once per
VFIO container and set_window()/unset_window() are supposed to be
called for every group in a container.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 21
arch/powerpc/platforms/powernv/pci-ioda.c | 84
locked_vm
accounting.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* tce_get_hva_cached() returns hva via a pointer
v4:
* updated docs
* s/kzmalloc/vzalloc/
* in tce_pin_pages()/tce_unpin_pages() removed @vaddr, @size and
replaced offset with index
* renamed vfio_iommu_type_register_memory
are PCI addresses shifted by IOMMU page shift.
The patch is pretty mechanical and behaviour is not expected to change.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 92 ++---
arch/powerpc/platforms/powernv/pci-p5ioc2.c | 9 ++-
arch
.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* tce_get_hva() returns hva via a pointer
---
drivers/vfio/vfio_iommu_spapr_tce.c | 69 +++--
1 file changed, 51 insertions(+), 18 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c
b/drivers/vfio
This is a part of moving DMA window programming to an iommu_ops
callback.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 85 ---
1 file changed, 56 insertions(+), 29 deletions(-)
diff --git a/arch
) needs to be pinned before using VFIO.
However when a huge DMA window is added, no additional pinning will be
required, otherwise it would be guest RAM + 2GB.
This advertises v2 SPAPR TCE IOMMU and restricts what the userspace
can do with v1 or v2 IOMMUs.
Signed-off-by: Alexey Kardashevskiy
create/set DMA windows on IOMMU groups so the same TCE tables will be
shared between several IOMMU groups.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 252
1 file changed, 170 insertions(+), 82 deletions(-)
diff --git a
5 levels which splits the table into a tree of smaller subtables.
This adds multi-level TCE tables support to pnv_pci_ioda2_create_table()
and pnv_pci_ioda2_free_table() callbacks.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 2 +
arch/powerpc/platforms
This changes few functions to receive a iommu_table_group pointer
rather than PE as they are going to be a part of upcoming
iommu_table_group_ops callback set.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 13 -
1 file changed, 8 insertions
This is to make extended ownership and multiple groups support patches
simpler for review.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 38 ++---
1 file changed, 23 insertions(+), 15 deletions(-)
diff
Modern IBM POWERPC systems support multiple (currently two) TCE tables
per IOMMU group (a.k.a. PE). This adds a iommu_table_group container
for TCE tables. Right now just one table is supported.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 18
counterpart is there already)
and uses it for powernv's pnv_tce_build().
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch/powerpc/kernel/iommu.c | 15 +++
arch/powerpc/platforms/powernv/pci.c | 7 +--
3 files changed, 17 insertions(
uot;multi" callbacks with single
ones.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 17 +++
arch/powerpc/include/asm/machdep.h | 25
arch/powerpc/kernel/iommu.c | 46 +++---
the platform code, VFIO
unprograms and removes all the tables it created.
Old-style ownership is still supported allowing VFIO to run on older
P5IOC2 and IODA IO controllers.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* fixed commit log that VFIO removes tables before passing ownership
the sake of TCE acceleration in KVM (coming soon).
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v6:
* added explicit VFIO_IOMMU_INFO_DDW flag to vfio_iommu_spapr_tce_info,
it used to be page mask flags from platform code
* added explicit pgsizes field
* added cleanup if
might be required to be bigger than the guest RAM. This also prints
pid of the current process in pr_warn/pr_debug.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* new helpers do nothing if @npages == 0
* tce_iommu_disable() now can decrement the counter if the group was
detached (not possibl
only.
This removes page unpinning from iommu_take_ownership() as the actual
TCE table might contain garbage and doing put_page() on it is undefined
behaviour.
Besides the last part, the rest of the patch is mechanical.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* s/iommu_tce_build(tbl
This adds a missing break statement to VFIO_DEVICE_SET_IRQS handler
without which vfio_pci_set_err_trigger() would never be called.
While we are here, add another "break" to VFIO_PCI_REQ_IRQ_INDEX case
so if we add more indexes later, we won't miss it.
Signed-off-by: Alexe
On 03/10/2015 01:07 AM, Alexey Kardashevskiy wrote:
This extends iommu_table_group_ops by a set of callbacks to support dynamic
DMA windows management.
query() returns IOMMU capabilities such as default DMA window address and
supported number of DMA windows and TCE table levels.
create_table
On 03/11/2015 11:09 AM, Alex Williamson wrote:
On Tue, 2015-03-10 at 01:07 +1100, Alexey Kardashevskiy wrote:
Before the IOMMU user would take control over the IOMMU table belonging to
a specific IOMMU group. This approach did not allow sharing tables between
IOMMU groups attached to the same
On 03/11/2015 10:03 AM, Alex Williamson wrote:
On Wed, 2015-03-11 at 09:57 +1100, Alexey Kardashevskiy wrote:
On 03/11/2015 06:56 AM, Alex Williamson wrote:
On Tue, 2015-03-10 at 01:06 +1100, Alexey Kardashevskiy wrote:
This checks that the TCE table page size is not bigger that the size of
a
On 03/11/2015 06:56 AM, Alex Williamson wrote:
On Tue, 2015-03-10 at 01:06 +1100, Alexey Kardashevskiy wrote:
This checks that the TCE table page size is not bigger that the size of
a page we just pinned and going to put its physical address to the table.
Otherwise the hardware gets unwanted
else/more so let's give it
more generic name. The bool parameter is inverted.
The callback is implemented for IODA2 only. Other platforms (P5IOC2,
IODA1) will use the old iommu_take_ownership/iommu_release_ownership API.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/io
This replaces iommu_take_ownership()/iommu_release_ownership() calls
with the callback calls and it is up to the platform code to call
iommu_take_ownership()/iommu_release_ownership() if needed.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 4 +--
arch/powerpc
.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 70 -
1 file changed, 54 insertions(+), 16 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c
b/drivers/vfio/vfio_iommu_spapr_tce.c
index d3ab34f..ca396e5 100644
--- a/drivers
it_map.
Clearing must be done outside of the table locks as iommu_clear_tce()
called from iommu_clear_tces_and_put_pages() does this.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v5:
* do not store bit#0 value, it has to be set for zero-based table
anyway
* removed test_and_clear_bit
---
arch
only.
This removes page unpinning from iommu_take_ownership() as the actual
TCE table might contain garbage and doing put_page() on it is undefined
behaviour.
Besides the last part, the rest of the patch is mechanical.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* s/iommu_tce_build(tbl
This makes use of the it_page_size from the iommu_table struct
as page size can differ.
This replaces missing IOMMU_PAGE_SHIFT macro in commented debug code
as recently introduced IOMMU_PAGE_XXX macros do not include
IOMMU_PAGE_SHIFT.
Signed-off-by: Alexey Kardashevskiy
Reviewed-by: David
This moves iommu_table creation to the beginning. This is a mechanical
patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 30 --
1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci
nting will be done by
VFIO_IOMMU_SPAPR_REGISTER_MEMORY.
In order to inform the userspace that VFIO supports new capabilities,
this adds a new SPAPR TCE IOMMU v2 type.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 3 ++-
include/uapi/linux/vfio.h | 2 ++
2
uot;multi" callbacks with single
ones.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 17 +++
arch/powerpc/include/asm/machdep.h | 25
arch/powerpc/kernel/iommu.c | 46 +++---
locked_vm
accounting.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* updated docs
* s/kzmalloc/vzalloc/
* in tce_pin_pages()/tce_unpin_pages() removed @vaddr, @size and
replaced offset with index
* renamed vfio_iommu_type_register_memory to vfio_iommu_spapr_register_memory
and removed
This is to make extended ownership and multiple groups support patches
simpler for review.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 38 ++---
1 file changed, 23 insertions(+), 15 deletions(-)
diff
iommu table(s).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch/powerpc/kernel/iommu.c| 9 +
arch/powerpc/platforms/powernv/pci.c | 2 +-
arch/powerpc/platforms/pseries/iommu.c | 12
4 files changed, 15 insertions
changes VFIO_IOMMU_SPAPR_TCE_GET_INFO handler to return additional
information such as a number of supported windows and maximum number
levels of TCE tables.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* moved code to tce_iommu_create_window()/tce_iommu_remove_window()
helpers
* added
might be required to be bigger than the guest RAM. This also prints
pid of the current process in pr_warn/pr_debug.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* new helpers do nothing if @npages == 0
* tce_iommu_disable() now can decrement the counter if the group was
detached (not possibl
This is a part of moving TCE table allocation into an iommu_ops
callback to support multiple IOMMU groups per one VFIO container.
This enforce window size to be a power of two.
This is a pretty mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c
At the moment DMA map/unmap requests are handled irrespective to
the container's state. This allows the user space to pin memory which
it might not be allowed to pin.
This adds checks to MAP/UNMAP that the container is enabled, otherwise
-EPERM is returned.
Signed-off-by: Alexey Kardashe
container
and set_window()/unset_window() are supposed to be called for every group
in a container.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 32 +++
arch/powerpc/platforms/powernv/pci-ioda.c | 87 -
arch/powerpc
be calculated by platform code from DMA direction.
This moves SetPageDirty() to the IOMMU code to make it work for both
VFIO ioctl interface in in-kernel TCE acceleration (when it becomes
available later).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 15
Modern IBM POWERPC systems support multiple (currently two) TCE tables
per IOMMU group (a.k.a. PE). This adds a iommu_table_group container
for TCE tables. Right now just one table is supported.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 18
5 levels which splits the table into a tree of smaller subtables.
This adds multi-level TCE tables support to pnv_pci_ioda2_create_table()
and pnv_pci_ioda2_free_table() callbacks.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 2 +
arch/powerpc/platforms
counterpart is there already)
and uses it for powernv's pnv_tce_build().
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch/powerpc/kernel/iommu.c | 15 +++
arch/powerpc/platforms/powernv/pci.c | 7 +--
3 files changed, 17 insertions(
platform code, the user
has to unprogram and remove all the tables it created.
Old-style ownership is still supported allowing VFIO to run on older
P5IOC2 and IODA IO controllers.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 30 +++---
drivers/vfio
are PCI addresses shifted by IOMMU page shift.
The patch is pretty mechanical and behaviour is not expected to change.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 92 ++---
arch/powerpc/platforms/powernv/pci-p5ioc2.c | 9 ++-
arch
This is a part of moving DMA window programming to an iommu_ops
callback.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 85 ---
1 file changed, 56 insertions(+), 29 deletions(-)
diff --git a/arch
This changes few functions to receive a iommu_table_group pointer
rather than PE as they are going to be a part of upcoming
iommu_table_group_ops callback set.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 13 -
1 file changed, 8 insertions
in "powerpc/powernv: Release replaced TCE"
* reposted to make some noise
Alexey Kardashevskiy (29):
vfio: powerpc/spapr: Move page pinning from arch code to VFIO IOMMU
driver
vfio: powerpc/spapr: Do cleanup when releasing the group
vfio: powerpc/spapr: Check that TCE page
The iommu_free_table helper release memory it is using (the TCE table and
@it_map) and release the iommu_table struct as well. We might not want
the very last step as we store iommu_table in parent structures.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch
create/set DMA windows on IOMMU groups so the same TCE tables will be
shared between several IOMMU groups.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 252
1 file changed, 170 insertions(+), 82 deletions(-)
diff --git a
This clears the TCE table when a container is being closed as this is
a good thing to leave the table clean before passing the ownership
back to the host kernel.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 14 +++---
1 file changed, 11 insertions(+), 3
compound_order() and compound_head() work correctly on non-huge
pages, there is no need for additional check whether the page is huge.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* s/tce_check_page_size/tce_page_is_contained/
---
drivers/vfio/vfio_iommu_spapr_tce.c | 22
Just noticed - this patch should be split into two, they were squashed by
mistake, my bad.
On 02/16/2015 09:06 PM, Alexey Kardashevskiy wrote:
The existing implementation accounts the whole DMA window in
the locked_vm counter which is going to be even worse with multiple
containers and huge
compound_order() and compound_head() work correctly on non-huge
pages, there is no need for additional check whether the page is huge.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* s/tce_check_page_size/tce_page_is_contained/
---
drivers/vfio/vfio_iommu_spapr_tce.c | 22
This clears the TCE table when a container is being closed as this is
a good thing to leave the table clean before passing the ownership
back to the host kernel.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 14 +++---
1 file changed, 11 insertions(+), 3
table(s).
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch/powerpc/kernel/iommu.c| 9 +
arch/powerpc/platforms/powernv/pci.c | 2 +-
arch/powerpc/platforms/pseries/iommu.c | 12
4 files changed, 15 insertions(+), 9
might be required to be bigger than the guest RAM. This also prints
pid of the current process in pr_warn/pr_debug.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* new helpers do nothing if @npages == 0
* tce_iommu_disable() now can decrement the counter if the group was
detached (not possibl
changes VFIO_IOMMU_SPAPR_TCE_GET_INFO handler to return additional
information such as a number of supported windows and maximum number
levels of TCE tables.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* moved code to tce_iommu_create_window()/tce_iommu_remove_window()
helpers
* added
locked_vm
accounting.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v4:
* updated docs
* s/kzmalloc/vzalloc/
* in tce_pin_pages()/tce_unpin_pages() removed @vaddr, @size and
replaced offset with index
* renamed vfio_iommu_type_register_memory to vfio_iommu_spapr_register_memory
and removed
are PCI addresses shifted by IOMMU page shift.
The patch is pretty mechanical and behaviour is not expected to change.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 92 ++---
arch/powerpc/platforms/powernv/pci-p5ioc2.c | 8 ++-
arch
o
we do not bother with iommu_table::it_map anymore
* added multilevel TCE tables support to support really huge guests
v2:
* added missing __pa() in "powerpc/powernv: Release replaced TCE"
* reposted to make some noise
Alexey Kardashevskiy (28):
vfio: powerpc/spapr: Move page pin
This is a part of moving TCE table allocation into an iommu_ops
callback to support multiple IOMMU groups per one VFIO container.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 88 +++
1 file changed
return NULL.
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 59 +++--
1 file changed, 44 insertions(+), 15 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c
b/drivers/vfio/vfio_iommu_spapr_tce.c
index 67ea392..7fd60f9
This is a part of moving DMA window programming to an iommu_ops
callback.
This is a mechanical patch.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 84 ---
1 file changed, 56 insertions(+), 28 deletions(-)
diff --git a/arch
Modern IBM POWERPC systems support multiple (currently two) TCE tables
per IOMMU group (a.k.a. PE). This adds a powerpc_iommu container
for TCE tables. Right now just one table is supported.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h| 18 +++--
arch
way it works on x86.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 31 +
arch/powerpc/platforms/powernv/pci-ioda.c | 75 +--
2 files changed, 92 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/include/asm
. This adds a requirement
for a platform to have exchange() implemented so from now on IODA2 is
the only supported PHB for VFIO-SPAPR.
This replaces iommu_tce_build() and iommu_clear_tce() with
a single iommu_tce_xchg().
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h
Normally a bitmap from the iommu_table is used to track what TCE entry
is in use. Since we are going to use iommu_table without its locks and
do xchg() instead, it becomes essential not to put bits which are not
implied in the direction flag.
Signed-off-by: Alexey Kardashevskiy
Reviewed-by
it_map.
Clearing must be done outside of the table locks as iommu_clear_tce()
called from iommu_clear_tces_and_put_pages() does this.
Signed-off-by: Alexey Kardashevskiy
---
Note: we might want to get rid of it as this patchset removes it_map
from tables passed to VFIO.
Changes:
v5:
* do not store bit
rship()/iommu_release_ownership() if needed. Next patches
will remove these calls from IODA2 code.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 18 +--
arch/powerpc/kernel/iommu.c | 53 +++
arch/powerpc/platforms/powernv/pci-ioda.c
unprogram DMA windows on PHBs before returning ownership
back to the kernel.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 30 ++
drivers/vfio/vfio_iommu_spapr_tce.c | 8
2 files changed, 34 insertions(+), 4 deletions
Signed-off-by: Alexey Kardashevskiy
---
drivers/vfio/vfio_iommu_spapr_tce.c | 62 +++--
1 file changed, 38 insertions(+), 24 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c
b/drivers/vfio/vfio_iommu_spapr_tce.c
index fdcc04c..4ff8289 100644
--- a
The iommu_free_table helper release memory it is using (the TCE table and
@it_map) and release the iommu_table struct as well. We might not want
the very last step as we store iommu_table in parent structures.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 1 +
arch
This changes few functions to receive a powerpc_iommu pointer
rather than PE as they are going to be a part of upcoming
powerpc_iommu_ops callback set.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/powernv/pci-ioda.c | 13 -
1 file changed, 8 insertions(+), 5
This adds multi-level TCE tables support to pnv_pci_ioda2_create_table()
and pnv_pci_ioda2_free_table() callbacks.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/iommu.h | 4 +
arch/powerpc/platforms/powernv/pci-ioda.c | 125 +++---
arch
-by: Alexey Kardashevskiy
---
Changes:
v4:
* updated docs
* s/kzmalloc/vzalloc/
* in tce_pin_pages()/tce_unpin_pages() removed @vaddr, @size and
replaced offset with index
* renamed vfio_iommu_type_register_memory to vfio_iommu_spapr_register_memory
and removed duplicating
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