linux_dsm_epyc7002/include
Zhen Lei 2da274cdf9 iommu/dma: Add support for non-strict mode
With the flush queue infrastructure already abstracted into IOVA
domains, hooking it up in iommu-dma is pretty simple. Since there is a
degree of dependency on the IOMMU driver knowing what to do to play
along, we key the whole thing off a domain attribute which will be set
on default DMA ops domains to request non-strict invalidation. That way,
drivers can indicate the appropriate support by acknowledging the
attribute, and we can easily fall back to strict invalidation otherwise.

The flush queue callback needs a handle on the iommu_domain which owns
our cookie, so we have to add a pointer back to that, but neatly, that's
also sufficient to indicate whether we're using a flush queue or not,
and thus which way to release IOVAs. The only slight subtlety is
switching __iommu_dma_unmap() from calling iommu_unmap() to explicit
iommu_unmap_fast()/iommu_tlb_sync() so that we can elide the sync
entirely in non-strict mode.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[rm: convert to domain attribute, tweak comments and commit message]
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-10-01 13:01:32 +01:00
..
acpi ACPICA: Update version to 20180810 2018-08-14 23:49:13 +02:00
asm-generic Kbuild updates for v4.19 (2nd) 2018-08-25 13:40:38 -07:00
clocksource
crypto crypto: scatterwalk - remove scatterwalk_samebuf() 2018-08-03 18:06:04 +08:00
drm drm pull for 4.19-rc1 2018-08-15 17:39:07 -07:00
dt-bindings ARM: SoC: late updates 2018-08-25 14:12:36 -07:00
keys
kvm KVM: arm/arm64: vgic-v3: Add core support for Group0 SGIs 2018-08-12 12:06:34 +01:00
linux iommu/dma: Add support for non-strict mode 2018-10-01 13:01:32 +01:00
math-emu
media - New Drivers 2018-08-20 15:38:44 -07:00
memory
misc
net Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-08-21 13:47:29 -07:00
pcmcia pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function 2018-08-18 12:30:42 -07:00
ras
rdma Second merge window update 2018-08-23 15:34:48 -07:00
scsi SCSI misc on 20180815 2018-08-15 22:06:26 -07:00
soc
sound ASoC: Updates for v4.19 2018-08-13 12:12:31 +02:00
target scsi: target: add session removal function 2018-08-02 15:29:31 -04:00
trace Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2018-08-24 13:19:27 -07:00
uapi This pull request contains updates for both UBI and UBIFS: 2018-08-23 15:58:04 -07:00
video fbdev changes for v4.19: 2018-08-23 15:44:58 -07:00
xen Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-08-18 16:48:07 -07:00