On ARM, x86_64, sparc64 platform, virt_to_page only convert a
_valid_ virtual address to struct page *, virt_addr_valid(x)
indicates whether a virtual address is valid. If ptr is point
to a static variable in module area, virt_to_page will return
a invalid value.
Signed-off-by: lijiazi
---
inclu
Hi Linus,
The following changes since commit 31f4f5b495a62c9a8b15b1c3581acd5efeb9af8c:
Linux 5.4-rc7 (2019-11-10 16:17:15 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
tags/iommu-updates-v5.5
for you to fetch changes up to 9b3a
pci_add_dma_alias can now be used to create a dma alias for a range of
devfns.
Signed-off-by: James Sewart
---
drivers/pci/pci.c| 23 ++-
drivers/pci/quirks.c | 14 +++---
include/linux/pci.h | 2 +-
3 files changed, 26 insertions(+), 13 deletions(-)
diff --git
The PLX PEX NTB forwards DMA transactions using Requester ID's that
don't exist as PCI devices. The devfn for a transaction is used as an
index into a lookup table storing the origin of a transaction on the
other side of the bridge.
This patch aliases all possible devfn's to the NTB device so that
On 29/11/2019 00:48, Cong Wang wrote:
If the maganize is empty, iova_magazine_free_pfns() should
magazine
be a nop, however it misses the case of mag->size==0. So we
should just call iova_magazine_empty().
This should reduce the contention on iovad->iova_rbtree_lock
a little bit.
Cc: Joerg
On 29/11/2019 00:48, Cong Wang wrote:
Both find_iova() and __free_iova() take iova_rbtree_lock,
there is no reason to take and release it twice inside
free_iova().
Fold them into the critical section by calling the unlock
versions instead.
Since generally the iova would be non-NULL, this seems
Serious screen flickering when Stoney Ridge outputs to a 4K monitor.
According to Alex Deucher, IOMMU isn't enabled on Windows, so let's do
the same here to avoid screen flickering on 4K monitor.
Cc: Alex Deucher
Bug: https://gitlab.freedesktop.org/drm/amd/issues/961
Signed-off-by: Kai-Heng Feng
On 29/11/2019 00:48, Cong Wang wrote:
The IOVA cache algorithm implemented in IOMMU code does not
exactly match the original algorithm described in the paper.
which paper?
Particularly, it doesn't need to free the loaded empty magazine
when trying to put it back to global depot. To make it w
On 2019-11-29 5:49 a.m., James Sewart wrote:
> pci_add_dma_alias can now be used to create a dma alias for a range of
> devfns.
>
> Signed-off-by: James Sewart
> ---
> drivers/pci/pci.c| 23 ++-
> drivers/pci/quirks.c | 14 +++---
> include/linux/pci.h | 2 +-
> On 29 Nov 2019, at 16:50, Logan Gunthorpe wrote:
>
>
>
> On 2019-11-29 5:49 a.m., James Sewart wrote:
>> pci_add_dma_alias can now be used to create a dma alias for a range of
>> devfns.
>>
>> Signed-off-by: James Sewart
>> ---
>> drivers/pci/pci.c| 23 ++-
>> drive
On 2019-11-29 10:19 a.m., James Sewart wrote:
>
>
>> On 29 Nov 2019, at 16:50, Logan Gunthorpe wrote:
>>
>>
>>
>> On 2019-11-29 5:49 a.m., James Sewart wrote:
>>> pci_add_dma_alias can now be used to create a dma alias for a range of
>>> devfns.
>>>
>>> Signed-off-by: James Sewart
>>> ---
>>>
The PLX PEX NTB forwards DMA transactions using Requester ID's that
don't exist as PCI devices. The devfn for a transaction is used as an
index into a lookup table storing the origin of a transaction on the
other side of the bridge.
This patch aliases all possible devfn's to the NTB device so that
On 2019-11-29 10:56 a.m., James Sewart wrote:
> The number of possible devfns is 256 so the size of the bitmap for
> allocations should be U8_MAX+1.
>
> Signed-off-by: James Sewart
Looks good to me. Thanks! For the whole series:
Reviewed-by: Logan Gunthorpe
> ---
> drivers/pci/pci.c|
The number of possible devfns is 256 so the size of the bitmap for
allocations should be U8_MAX+1.
Signed-off-by: James Sewart
---
drivers/pci/pci.c| 2 +-
drivers/pci/search.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index
pci_add_dma_alias can now be used to create a dma alias for a range of
devfns.
Signed-off-by: James Sewart
---
drivers/pci/pci.c| 23 ++-
drivers/pci/quirks.c | 14 +++---
include/linux/pci.h | 2 +-
3 files changed, 26 insertions(+), 13 deletions(-)
diff --git
Not necessarily a big leap for mankind, but using bit macros makes
the code better readable, especially the definition of DMA_BIT_MASK
is more intuitive.
Signed-off-by: Heiner Kallweit
---
include/linux/dma-mapping.h | 21 +++--
1 file changed, 11 insertions(+), 10 deletions(-)
On Fri, Nov 29, 2019 at 6:43 AM John Garry wrote:
>
> On 29/11/2019 00:48, Cong Wang wrote:
> > The IOVA cache algorithm implemented in IOMMU code does not
> > exactly match the original algorithm described in the paper.
> >
>
> which paper?
It's in drivers/iommu/iova.c, from line 769:
769 /*
On Fri, Nov 29, 2019 at 5:24 AM John Garry wrote:
>
> On 29/11/2019 00:48, Cong Wang wrote:
> > If the maganize is empty, iova_magazine_free_pfns() should
>
> magazine
Good catch!
>
> > be a nop, however it misses the case of mag->size==0. So we
> > should just call iova_magazine_empty().
> >
>
On Fri, Nov 29, 2019 at 5:34 AM John Garry wrote:
>
> On 29/11/2019 00:48, Cong Wang wrote:
> > Both find_iova() and __free_iova() take iova_rbtree_lock,
> > there is no reason to take and release it twice inside
> > free_iova().
> >
> > Fold them into the critical section by calling the unlock
>
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