Date: Mon, 2 May 2016 11:45:41 -0700 From: "Ngie Cooper (yaneurabeya)" <yaneurabeya@gmail.com> To: John Baldwin <jhb@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r298933 - in head: share/man/man9 sys/amd64/include sys/dev/acpica sys/dev/drm2 sys/dev/drm2/i915 sys/kern sys/sys sys/x86/acpica sys/x86/x86 Message-ID: <4F040E00-AB92-4D32-99F5-9BCB02578DC0@gmail.com> In-Reply-To: <201605021800.u42I0cjK084243@repo.freebsd.org> References: <201605021800.u42I0cjK084243@repo.freebsd.org>
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> On May 2, 2016, at 11:00, John Baldwin <jhb@FreeBSD.org> wrote: >=20 > Author: jhb > Date: Mon May 2 18:00:38 2016 > New Revision: 298933 > URL: https://svnweb.freebsd.org/changeset/base/298933 >=20 > Log: > Add a new bus method to fetch device-specific CPU sets. >=20 > bus_get_cpus() returns a specified set of CPUs for a device. It = accepts > an enum for the second parameter that indicates the type of cpuset to > request. Currently two valus are supported: >=20 > - LOCAL_CPUS (on x86 this returns all the CPUs in the package = closest to > the device when DEVICE_NUMA is enabled) > - INTR_CPUS (like LOCAL_CPUS but only returns 1 SMT thread for each = core) >=20 > For systems that do not support NUMA (or if it is not enabled in the = kernel > config), LOCAL_CPUS fails with EINVAL. INTR_CPUS is mapped to = 'all_cpus' > by default. The idea is that INTR_CPUS should always return a valid = set. >=20 > Device drivers which want to use per-CPU interrupts should start = using > INTR_CPUS instead of simply assigning interrupts to all available = CPUs. > In the future we may wish to add tunables to control the policy of > INTR_CPUS (e.g. should it be local-only or global, should it ignore > SMT threads or not). >=20 > The x86 nexus driver exposes the internal set of interrupt CPUs from = the > the x86 interrupt code via INTR_CPUS. >=20 > The ACPI bus driver and PCI bridge drivers use _PXM to return a = suitable > LOCAL_CPUS set when _PXM exists and DEVICE_NUMA is enabled. They = also and > the global INTR_CPUS set from the nexus driver with the per-domain = set from > _PXM to generate a local INTR_CPUS set for child devices. >=20 > Reviewed by: wblock (manpage) > Differential Revision: https://reviews.freebsd.org/D5519 >=20 > Added: > head/share/man/man9/BUS_GET_CPUS.9 (contents, props changed) > Modified: > head/share/man/man9/Makefile > head/sys/amd64/include/intr_machdep.h > head/sys/dev/acpica/acpi.c > head/sys/dev/acpica/acpi_pci.c > head/sys/dev/acpica/acpi_pcib.c > head/sys/dev/acpica/acpi_pcib_acpi.c > head/sys/dev/acpica/acpi_pcib_pci.c > head/sys/dev/acpica/acpi_pcibvar.h > head/sys/dev/acpica/acpivar.h > head/sys/dev/drm2/drm_dp_iic_helper.c > head/sys/dev/drm2/i915/dvo.h > head/sys/kern/bus_if.m > head/sys/kern/subr_bus.c > head/sys/sys/bus.h > head/sys/x86/acpica/OsdEnvironment.c > head/sys/x86/x86/intr_machdep.c > head/sys/x86/x86/nexus.c This broke the build with gcc: = https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc/1211/=
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