1. 12 7月, 2018 20 次提交
  2. 11 7月, 2018 2 次提交
  3. 10 7月, 2018 1 次提交
    • L
      arm64: numa: rework ACPI NUMA initialization · e1896249
      Lorenzo Pieralisi 提交于
      Current ACPI ARM64 NUMA initialization code in
      
      acpi_numa_gicc_affinity_init()
      
      carries out NUMA nodes creation and cpu<->node mappings at the same time
      in the arch backend so that a single SRAT walk is needed to parse both
      pieces of information.  This implies that the cpu<->node mappings must
      be stashed in an array (sized NR_CPUS) so that SMP code can later use
      the stashed values to avoid another SRAT table walk to set-up the early
      cpu<->node mappings.
      
      If the kernel is configured with a NR_CPUS value less than the actual
      processor entries in the SRAT (and MADT), the logic in
      acpi_numa_gicc_affinity_init() is broken in that the cpu<->node mapping
      is only carried out (and stashed for future use) only for a number of
      SRAT entries up to NR_CPUS, which do not necessarily correspond to the
      possible cpus detected at SMP initialization in
      acpi_map_gic_cpu_interface() (ie MADT and SRAT processor entries order
      is not enforced), which leaves the kernel with broken cpu<->node
      mappings.
      
      Furthermore, given the current ACPI NUMA code parsing logic in
      acpi_numa_gicc_affinity_init(), PXM domains for CPUs that are not parsed
      because they exceed NR_CPUS entries are not mapped to NUMA nodes (ie the
      PXM corresponding node is not created in the kernel) leaving the system
      with a broken NUMA topology.
      
      Rework the ACPI ARM64 NUMA initialization process so that the NUMA
      nodes creation and cpu<->node mappings are decoupled. cpu<->node
      mappings are moved to SMP initialization code (where they are needed),
      at the cost of an extra SRAT walk so that ACPI NUMA mappings can be
      batched before being applied, fixing current parsing pitfalls.
      Acked-by: NHanjun Guo <hanjun.guo@linaro.org>
      Tested-by: NJohn Garry <john.garry@huawei.com>
      Fixes: d8b47fca ("arm64, ACPI, NUMA: NUMA support based on SRAT and
      SLIT")
      Link: http://lkml.kernel.org/r/1527768879-88161-2-git-send-email-xiexiuqi@huawei.comReported-by: NXie XiuQi <xiexiuqi@huawei.com>
      Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
      Cc: Punit Agrawal <punit.agrawal@arm.com>
      Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Hanjun Guo <guohanjun@huawei.com>
      Cc: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>
      Cc: Jeremy Linton <jeremy.linton@arm.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Xie XiuQi <xiexiuqi@huawei.com>
      Signed-off-by: NWill Deacon <will.deacon@arm.com>
      e1896249
  4. 09 7月, 2018 1 次提交
  5. 06 7月, 2018 16 次提交