Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Mon, 31 Jul 2017 20:57:19 +0200 | Subject | Re: [PATCH v2 0/5] ACPI: DMA ranges management |
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On Mon, Jul 31, 2017 at 5:23 PM, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> wrote: > This patch series is v2 of a previous posting: > > v1: http://lkml.kernel.org/r/20170720144517.32529-1-lorenzo.pieralisi@arm.com > > v1->v2: > - Reworked acpi_dma_get_range() flow and logs > - Added IORT named component address limits > - Renamed acpi_dev_get_resources() helper function > - Rebased against v4.13-rc3 > > -- Original cover letter -- > > As reported in: > > http://lkml.kernel.org/r/CAL85gmA_SSCwM80TKdkZqEe+S1beWzDEvdki1kpkmUTDRmSP7g@mail.gmail.com > > the bus connecting devices to an IOMMU bus can be smaller in size than > the IOMMU input address bits which results in devices DMA HW bugs in > particular related to IOVA allocation (ie chopping of higher address > bits owing to system bus HW capabilities mismatch with the IOMMU). > > Fortunately this problem can be solved through an already present but never > used ACPI 6.2 firmware bindings (ie _DMA object) allowing to define the DMA > window for a specific bus in ACPI and therefore all upstream devices > connected to it. > > This small patch series enables _DMA parsing in ACPI core code and > use it in ACPI IORT code in order to detect DMA ranges for devices and > update their data structures to make them work with their related DMA > addressing restrictions. > > Cc: Will Deacon <will.deacon@arm.com> > Cc: Hanjun Guo <hanjun.guo@linaro.org> > Cc: Feng Kan <fkan@apm.com> > Cc: Jon Masters <jcm@redhat.com> > Cc: Robert Moore <robert.moore@intel.com> > Cc: Robin Murphy <robin.murphy@arm.com> > Cc: Zhang Rui <rui.zhang@intel.com> > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> > > Lorenzo Pieralisi (5): > ACPICA: resource_mgr: Allow _DMA method in walk resources > ACPI: Make acpi_dev_get_resources() method agnostic > ACPI: Introduce DMA ranges parsing > ACPI: Make acpi_dma_configure() DMA regions aware > ACPI/IORT: Add IORT named component memory address limits
Patches [1-3/5] are fine by me, but I need ACKs from the ARM side on the last two ones.
Thanks, Rafael
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