This is a reboot of Zhen Lei's series from a couple of years ago, which
never made it across the line.
I still think that it has some value, so taking up the mantle.
Motivation:
Allow lazy mode be default mode for DMA domains for all ARCHs, and not
only those who hardcode it (to be lazy). For ARM64, currently we must use
a kernel command line parameter to use lazy mode, which is less than
ideal.
I have now included the print for strict/lazy mode, which I originally
sent in:
https://lore.kernel.org/linux-iommu/[email protected]/
There was some concern there about drivers and their custom prints
conflicting with the print in that patch, but I think that it
should be ok.
Based on next-20210611 + "iommu: Update "iommu.strict" documentation"
Differences to v13:
- Improve strict mode deprecation messages and cut out some
kernel-parameters.txt legacy description
- Add tag in 1/6
- use pr_info_once() for vt-d message about VM and caching
Differences to v12:
- Add Robin's RB tags (thanks!)
- Add a patch to mark x86 strict cmdline params as deprecated
- Improve wording in Kconfig change and tweak iommu_dma_strict declaration
Differences to v11:
- Rebase to next-20210610
- Drop strict mode globals in Intel and AMD drivers
- Include patch to print strict vs lazy mode
- Include patch to remove argument from iommu_set_dma_strict()
John Garry (3):
iommu: Deprecate Intel and AMD cmdline methods to enable strict mode
iommu: Print strict or lazy mode at init time
iommu: Remove mode argument from iommu_set_dma_strict()
Zhen Lei (3):
iommu: Enhance IOMMU default DMA mode build options
iommu/vt-d: Add support for IOMMU default DMA mode build options
iommu/amd: Add support for IOMMU default DMA mode build options
.../admin-guide/kernel-parameters.txt | 12 ++----
drivers/iommu/Kconfig | 41 +++++++++++++++++++
drivers/iommu/amd/amd_iommu_types.h | 6 ---
drivers/iommu/amd/init.c | 7 ++--
drivers/iommu/amd/iommu.c | 6 ---
drivers/iommu/intel/iommu.c | 16 ++++----
drivers/iommu/iommu.c | 12 ++++--
include/linux/iommu.h | 2 +-
8 files changed, 65 insertions(+), 37 deletions(-)
--
2.26.2
On 18/06/2021 12:34, John Garry wrote:
> This is a reboot of Zhen Lei's series from a couple of years ago, which
> never made it across the line.
>
> I still think that it has some value, so taking up the mantle.
>
> Motivation:
> Allow lazy mode be default mode for DMA domains for all ARCHs, and not
> only those who hardcode it (to be lazy). For ARM64, currently we must use
> a kernel command line parameter to use lazy mode, which is less than
> ideal.
>
> I have now included the print for strict/lazy mode, which I originally
> sent in:
> https://lore.kernel.org/linux-iommu/[email protected]/
>
> There was some concern there about drivers and their custom prints
> conflicting with the print in that patch, but I think that it
> should be ok.
>
> Based on next-20210611 + "iommu: Update "iommu.strict" documentation"
Hi Joerg, Will,
We think that this series is ready to go.
There would be a build conflict with the following:
https://lore.kernel.org/linux-iommu/[email protected]/
So please let us know where you stand on it, so that could be resolved.
Robin and Baolu have kindly reviewed all the patches, apart from the AMD
one.
Thanks,
John
Hi John,
On Fri, Jun 25, 2021 at 05:41:09PM +0100, John Garry wrote:
> We think that this series is ready to go.
>
> There would be a build conflict with the following:
> https://lore.kernel.org/linux-iommu/[email protected]/
>
> So please let us know where you stand on it, so that could be resolved.
>
> Robin and Baolu have kindly reviewed all the patches, apart from the AMD
> one.
The AMD one also looks good to me, please re-send after the merge window
closes and I will take care of it then. Note that I usually start
merging new stuff after -rc3 is out.
Regards,
Joerg