On Fri, May 13, 2022 at 10:09:46AM +0800, Baolu Lu wrote: > On 2022/5/13 07:12, Steve Wahl wrote: > > On Thu, May 12, 2022 at 10:13:09AM -0500, Steve Wahl wrote: > > > To support up to 64 sockets with 10 DMAR units each (640), make the > > > value of DMAR_UNITS_SUPPORTED adjustable by a config variable, > > > CONFIG_DMAR_UNITS_SUPPORTED, and make it's default 1024 when MAXSMP is > > > set. > > > > > > If the available hardware exceeds DMAR_UNITS_SUPPORTED (previously set > > > to MAX_IO_APICS, or 128), it causes these messages: "DMAR: Failed to > > > allocate seq_id", "DMAR: Parse DMAR table failure.", and "x2apic: IRQ > > > remapping doesn't support X2APIC mode x2apic disabled"; and the system > > > fails to boot properly. > > > > > > Signed-off-by: Steve Wahl <steve.w...@hpe.com> > > > > I've received a report from the kernel test robot <l...@intel.com>, > > that this patch causes an error (shown below) when > > CONFIG_IOMMU_SUPPORT is not set. > > > > In my opinion, this is because include/linux/dmar.h and > > include/linux/intel-iommu are being #included when they are not really > > being used. > > > > I've tried placing the contents of intel-iommu.h within an #ifdef > > CONFIG_INTEL_IOMMU, and that fixes the problem. > > > > Two questions: > > > > A) Is this the desired approach to to the fix? > > Most part of include/linux/intel-iommu.h is private to Intel IOMMU > driver. They should be put in a header like drivers/iommu/intel > /iommu.h. Eventually, we should remove include/linux/intel-iommu.h > and device drivers interact with iommu subsystem through the IOMMU > kAPIs. > > Best regards, > baolu
Baolu's recent patch to move intel-iommu.h private still allows my [PATCH v2] to apply with no changes, and gets rid of the compile errors when CONFIG_IOMMU_SUPPORT is not set, so the kernel test robot should be happy now. Is there another step I should do to bring this patch back into focus? Thanks. --> Steve -- Steve Wahl, Hewlett Packard Enterprise _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
