Hey,
I’m looking into an issue after remapping some memory on 4.19, but looking
at the code this may also be an issue in master.
I have a driver that grabs some pages using alloc_pages, these pages are
then remapped to userspace using calls to vm_insert_page inside a syfs
bin_attribute mmap
Hey Lu,
> On 20 Mar 2019, at 01:26, Lu Baolu wrote:
>
> Hi James,
>
> On 3/19/19 9:35 PM, James Sewart wrote:
>> Hey Lu,
>>> On 15 Mar 2019, at 03:13, Lu Baolu wrote:
>>>
>>> Hi James,
>>>
>>> On 3/14/19 7:56 PM, James
Hey Dmitry,
> On 8 Mar 2019, at 01:20, Dmitry Safonov wrote:
>
> On 3/4/19 3:46 PM, James Sewart wrote:
>> +static inline int domain_is_initialised(struct dmar_domain *domain)
>> +{
>> +return domain->flags & DOMAIN_FLAG_INITIALISED;
>> +}
>
Hey Lu,
> On 9 Mar 2019, at 01:53, Lu Baolu wrote:
>
> Hi James,
>
> On 3/9/19 12:57 AM, James Sewart wrote:
>> Hey Lu,
>>> On 8 Mar 2019, at 03:09, Lu Baolu wrote:
>>>>>
>>>>> Do you mind if I work on top of your patches fo
Hey Lu,
> On 8 Mar 2019, at 03:09, Lu Baolu wrote:
>
> Hi James,
>
> On 3/7/19 6:21 PM, James Sewart wrote:
>> Hey Lu,
>>> On 7 Mar 2019, at 06:31, Lu Baolu wrote:
>>>
>>> Hi James,
>>>
>>> On 3/7/19 2:08 AM, James
Hey Lu,
> On 7 Mar 2019, at 06:31, Lu Baolu wrote:
>
> Hi James,
>
> On 3/7/19 2:08 AM, James Sewart wrote:
>>>>>> -/*
>>>>>> - * For each rmrr
>>>>>> - * for each dev attached to rmrr
>>>
Hey,
> On 6 Mar 2019, at 07:00, Lu Baolu wrote:
>
> Hi,
>
> On 3/5/19 7:46 PM, James Sewart wrote:
>> Hey Lu,
>>> On 5 Mar 2019, at 06:59, Lu Baolu wrote:
>>>
>>> Hi,
>>>
>>> It's hard for me to understand why do we remove
anyway.
>
> More comments inline.
>
> On 3/4/19 11:47 PM, James Sewart wrote:
>> The generic IOMMU code will allocate and attach a dma ops domain to each
>> device that comes online, replacing any lazy allocated domain. Removes
>> RMRR application at iommu init ti
Hey Lu,
> On 5 Mar 2019, at 06:46, Lu Baolu wrote:
>
> Hi,
>
> On 3/4/19 11:46 PM, James Sewart wrote:
>> Allowing IOMMU_DOMAIN_DMA type IOMMU domain to be allocated allows the
>> default_domain of an iommu_group to be set. This delegates device-domain
>> r
within its group, these regions could be remapped
for the other devices resulting in unexpected behaviour during
peer-to-peer transfers.
Cheers,
James
> On 5 Mar 2019, at 06:05, Lu Baolu wrote:
>
> Hi James,
>
> Very glad to see this. Thank you!
>
> On 3/4/19 11:41 PM,
create_direct_mappings.
Signed-off-by: James Sewart
---
drivers/iommu/intel-iommu.c | 202 ++--
1 file changed, 8 insertions(+), 194 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 71cd6bbfec05..282257e2628d 100644
--- a/drivers/iommu
Allowing IOMMU_DOMAIN_DMA type IOMMU domain to be allocated allows the
default_domain of an iommu_group to be set. This delegates device-domain
relationships to the generic IOMMU code.
Signed-off-by: James Sewart
---
drivers/iommu/intel-iommu.c | 113 +++-
1 file
Used by iommu.c before creating identity mappings for reserved ranges to
ensure dma-map-ops won't ever remap these addresses.
Signed-off-by: James Sewart
---
drivers/iommu/intel-iommu.c | 14 ++
1 file changed, 14 insertions(+)
diff --git a/drivers/iommu/intel-iommu.c b/drivers
If an IOMMU driver requires to know which IOMMU a domain is associated
to initialise a domain then it will do so in device_attach, before which
it is not safe to call iommu_ops.
Signed-off-by: James Sewart
---
drivers/iommu/iommu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff
the
lazy allocation logic would not be used as any domain allocated using
these paths would be replaced when attaching the group default domain.
Default domain allocation has been tested with and without this patch on
4.19.
Cheers,
James.
James Sewart (4):
iommu: Move
Hey Jacob,
> On 7 Jan 2019, at 20:04, Jacob Pan wrote:
>
> On Wed, 5 Dec 2018 17:19:35 +0000
> James Sewart wrote:
>
>> Hey,
>>
>> There exists an issue in the logic used to determine domain
>> association with devices. Currently the driver uses
Bump
> On 5 Dec 2018, at 17:19, James Sewart wrote:
>
> Hey,
>
> There exists an issue in the logic used to determine domain association
> with devices. Currently the driver uses find_or_alloc_domain to either
> reuse an existing domain or allocate a new one if one
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