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  1. 21 10月, 2020 2 次提交
  3. 23 7月, 2020 1 次提交
  5. 14 7月, 2020 1 次提交
  7. 06 7月, 2020 1 次提交
  9. 30 5月, 2020 1 次提交
  11. 30 1月, 2020 1 次提交
  13. 29 1月, 2020 1 次提交
  15. 25 1月, 2020 2 次提交
  17. 22 11月, 2019 1 次提交
  19. 21 11月, 2019 2 次提交
  21. 18 9月, 2019 2 次提交
  23. 09 7月, 2019 1 次提交
  25. 24 4月, 2019 1 次提交
  27. 30 1月, 2019 1 次提交
  29. 14 12月, 2018 1 次提交
  31. 06 12月, 2018 1 次提交
  33. 19 10月, 2018 1 次提交
    • J
      PCI: vmd: Detach resources after stopping root bus · dc8af3a8
      由 Jon Derrick 提交于 
      The VMD removal path calls pci_stop_root_busi(), which tears down the pcie
tree, including detaching all of the attached drivers. During driver
detachment, devices may use pci_release_region() to release resources.
This path relies on the resource being accessible in resource tree.

By detaching the child domain from the parent resource domain prior to
stopping the bus, we are preventing the list traversal from finding the
resource to be freed. If we instead detach the resource after stopping
the bus, we will have properly freed the resource and detaching is
simply accounting at that point.

Without this order, the resource is never freed and is orphaned on VMD
removal, leading to a warning:

[  181.940162] Trying to free nonexistent resource <e5a10000-e5a13fff>

Fixes: 2c2c5c5c ("x86/PCI: VMD: Attach VMD resources to parent domain's resource tree")
Signed-off-by: NJon Derrick <jonathan.derrick@intel.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: NKeith Busch <keith.busch@intel.com>
      dc8af3a8
  35. 01 10月, 2018 1 次提交
  37. 29 6月, 2018 1 次提交
  39. 08 6月, 2018 1 次提交
  41. 25 5月, 2018 4 次提交
  43. 29 1月, 2018 1 次提交
  45. 31 8月, 2017 1 次提交
  47. 15 8月, 2017 1 次提交
  49. 04 8月, 2017 2 次提交
  51. 03 7月, 2017 3 次提交
  53. 23 6月, 2017 1 次提交
  55. 25 1月, 2017 1 次提交
    • B
      treewide: Constify most dma_map_ops structures · 5299709d
      由 Bart Van Assche 提交于 
      Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:

git grep -l 'struct dma_map_ops' |
  xargs -d\\n sed -i \
    -e 's/struct dma_map_ops/const struct dma_map_ops/g' \
    -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
    -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
    -e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
       -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
       -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
    drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      5299709d
  57. 08 12月, 2016 2 次提交
    • B
      PCI: vmd: Fix suspend handlers defined-but-not-used warning · 42db500a
      由 Borislav Petkov 提交于 
      Fix the following warnings:

  drivers/pci/host/vmd.c:731:12: warning: ‘vmd_suspend’ defined but not used [-Wunused-function]
   static int vmd_suspend(struct device *dev)
              ^
  drivers/pci/host/vmd.c:739:12: warning: ‘vmd_resume’ defined but not used [-Wunused-function]
   static int vmd_resume(struct device *dev)
              ^
Signed-off-by: NBorislav Petkov <bp@suse.de>
Signed-off-by: NBjorn Helgaas <helgaas@kernel.org>
Reviewed-by: NKeith Busch <keith.busch@intel.com>
      42db500a
    • J
      PCI: vmd: Use SRCU as a local RCU to prevent delaying global RCU · 3906b918
      由 Jon Derrick 提交于 
      SRCU lets synchronize_srcu() depend on VMD-local RCU primitives, preventing
long delays from locking up RCU in other systems.  VMD performs a
synchronize when removing a device, but will hit all IRQ lists if the
device uses all VMD vectors.  This patch will not help VMD's RCU
synchronization, but will isolate the read side delays to the VMD
subsystem.  Additionally, the use of SRCU in VMD's ISR will keep it
isolated from any other RCU waiters in the rest of the system.

Tested using concurrent FIO and NVMe resets:

  [global]
  rw=read
  bs=4k
  direct=1
  ioengine=libaio
  iodepth=32
  norandommap
  timeout=300
  runtime=1000000000

  [nvme0]
  cpus_allowed=0-63
  numjobs=8
  filename=/dev/nvme0n1

  [nvme1]
  cpus_allowed=0-63
  numjobs=8
  filename=/dev/nvme1n1

  while (true) do
    for i in /sys/class/nvme/nvme*; do
      echo "Resetting ${i##*/}"
      echo 1 > $i/reset_controller;
      sleep 5
    done;
  done
Signed-off-by: NJon Derrick <jonathan.derrick@intel.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NKeith Busch <keith.busch@intel.com>
      3906b918