On 27/02/18 06:21, Tian, Kevin wrote:
[...]
>> Technically nothing prevents it, but now the resv problem discussed on
>> patch 2/37 stands out. For example on x86 you'd probably need to carve
>> the
>> IOAPIC MSI range out of the process address space. On Arm you'd need to
>> create a write-only
> From: Jean-Philippe Brucker [mailto:jean-philippe.bruc...@arm.com]
> Sent: Thursday, February 15, 2018 8:42 PM
>
> On 13/02/18 23:43, Tian, Kevin wrote:
> >> From: Jean-Philippe Brucker
> >> Sent: Tuesday, February 13, 2018 8:40 PM
> >>
> >>
> >> [...]
> +
> +/**
> + *
On 15/02/18 09:59, Joerg Roedel wrote:
> On Mon, Feb 12, 2018 at 06:33:16PM +, Jean-Philippe Brucker wrote:
>
>> +config IOMMU_SVA
>> +bool "Shared Virtual Addressing API for the IOMMU"
>> +select IOMMU_API
>> +help
>> + Enable process address space management for the IOMMU
On 13/02/18 23:43, Tian, Kevin wrote:
>> From: Jean-Philippe Brucker
>> Sent: Tuesday, February 13, 2018 8:40 PM
>>
>>
>> [...]
+
+/**
+ * iommu_sva_device_init() - Initialize Shared Virtual Addressing for a
device
+ * @dev: the device
+ * @features: bitmask of
On Mon, Feb 12, 2018 at 06:33:16PM +, Jean-Philippe Brucker wrote:
> +config IOMMU_SVA
> + bool "Shared Virtual Addressing API for the IOMMU"
> + select IOMMU_API
> + help
> + Enable process address space management for the IOMMU API. In systems
> + that support it,
> From: Jean-Philippe Brucker
> Sent: Tuesday, February 13, 2018 8:40 PM
>
>
> [...]
> >> +
> >> +/**
> >> + * iommu_sva_device_init() - Initialize Shared Virtual Addressing for a
> >> device
> >> + * @dev: the device
> >> + * @features: bitmask of features that need to be initialized
> >> + *
Hi Kevin,
Thanks for taking a look!
On 13/02/18 07:31, Tian, Kevin wrote:
>> From: Jean-Philippe Brucker
>> Sent: Tuesday, February 13, 2018 2:33 AM
>>
>> Shared Virtual Addressing (SVA) provides a way for device drivers to bind
>> process address spaces to devices. This requires the IOMMU to
> From: Jean-Philippe Brucker
> Sent: Tuesday, February 13, 2018 2:33 AM
>
> Shared Virtual Addressing (SVA) provides a way for device drivers to bind
> process address spaces to devices. This requires the IOMMU to support the
> same page table format as CPUs, and requires the system to support
Shared Virtual Addressing (SVA) provides a way for device drivers to bind
process address spaces to devices. This requires the IOMMU to support the
same page table format as CPUs, and requires the system to support I/O
Page Faults (IOPF) and Process Address Space ID (PASID). When all of these
are
