aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/of/of_numa.c (follow)
AgeCommit message (Collapse)AuthorFilesLines
2017-04-18of: fix "/cpus" reference leak in of_numa_parse_cpu_nodes()Tyrel Datwyler1-0/+2
The call to of_find_node_by_path("/cpus") returns the cpus device_node with its reference count incremented. There is no matching of_node_put() call in of_numa_parse_cpu_nodes() which results in a leaked reference to the "/cpus" node. This patch adds an of_node_put() to release the reference. fixes: 298535c00a2c ("of, numa: Add NUMA of binding implementation.") Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Acked-by: David Daney <david.daney@cavium.com> Cc: stable@vger.kernel.org # v4.7+ Signed-off-by: Rob Herring <robh@kernel.org>
2016-11-15of, numa: Return NUMA_NO_NODE from disable of_node_to_nid() if nid not possible.David Daney1-1/+6
On arm64 NUMA kernels we can pass "numa=off" on the command line to disable NUMA. A side effect of this is that kmalloc_node() calls to non-zero nodes will crash the system with an OOPS: [ 0.000000] ITS@0x0000901000020000: allocated 2097152 Devices @10002000000 (flat, esz 8, psz 64K, shr 1) [ 0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00001680 [ 0.000000] pgd = fffffc0009470000 [ 0.000000] [00001680] *pgd=0000010ffff90003, *pud=0000010ffff90003, *pmd=0000010ffff90003, *pte=0000000000000000 [ 0.000000] Internal error: Oops: 96000006 [#1] SMP . . . [ 0.000000] [<fffffc00081c8950>] __alloc_pages_nodemask+0xa4/0xe68 [ 0.000000] [<fffffc000821fa70>] new_slab+0xd0/0x564 [ 0.000000] [<fffffc0008221e24>] ___slab_alloc+0x2e4/0x514 [ 0.000000] [<fffffc0008239498>] __slab_alloc+0x48/0x58 [ 0.000000] [<fffffc0008222c20>] __kmalloc_node+0xd0/0x2dc [ 0.000000] [<fffffc0008115374>] __irq_domain_add+0x7c/0x164 [ 0.000000] [<fffffc0008b461dc>] its_probe+0x784/0x81c [ 0.000000] [<fffffc0008b462bc>] its_init+0x48/0x1b0 [ 0.000000] [<fffffc0008b4543c>] gic_init_bases+0x228/0x360 [ 0.000000] [<fffffc0008b456bc>] gic_of_init+0x148/0x1cc [ 0.000000] [<fffffc0008b5aec8>] of_irq_init+0x184/0x298 [ 0.000000] [<fffffc0008b43f9c>] irqchip_init+0x14/0x38 [ 0.000000] [<fffffc0008b12d60>] init_IRQ+0xc/0x30 [ 0.000000] [<fffffc0008b10a3c>] start_kernel+0x240/0x3b8 [ 0.000000] [<fffffc0008b101c4>] __primary_switched+0x30/0x6c [ 0.000000] Code: 912ec2a0 b9403809 0a0902fb 37b007db (f9400300) . . . This is caused by code like this in kernel/irq/irqdomain.c domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size), GFP_KERNEL, of_node_to_nid(of_node)); When NUMA is disabled, the concept of a node is really undefined, so of_node_to_nid() should unconditionally return NUMA_NO_NODE. Fix by returning NUMA_NO_NODE when the nid is not in the set of possible nodes. Reported-by: Gilbert Netzer <noname@pdc.kth.se> Signed-off-by: David Daney <david.daney@cavium.com> Cc: stable@vger.kernel.org # 4.7+ Signed-off-by: Rob Herring <robh@kernel.org>
2016-09-09of_numa: Use pr_fmt()Kefeng Wang1-10/+11
Use pr_fmt to prefix kernel output. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-09of_numa: Use of_get_next_parent to simplify codeKefeng Wang1-5/+1
Use of_get_next_parent() instead of open-code. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-09of/numa: remove a duplicated warningZhen Lei1-7/+2
This warning has been printed in of_numa_parse_cpu_nodes before. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-09of/numa: add nid check for memory blockZhen Lei1-0/+5
If the numa-id which was configured in memory@ devicetree node is greater than MAX_NUMNODES, we should report a warning. We have done this for cpus and distance-map dt nodes, this patch help them to be consistent. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-09of/numa: fix a memory@ node can only contains one memory blockZhen Lei1-19/+10
For a normal memory@ devicetree node, its reg property can contains more memory blocks. Because we don't known how many memory blocks maybe contained, so we try from index=0, increase 1 until error returned(the end). Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-09of/numa: remove a duplicated pr_debug informationZhen Lei1-4/+0
This information will be printed in the subfunction numa_add_memblk. They are not the same, but very similar. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-05-30arm64, NUMA: rework numa_add_memblk()Hanjun Guo1-2/+2
Rework numa_add_memblk() to update the parameter "u64 size" to "u64 end", this will make it consistent with x86 and simplifies the arm64 ACPI NUMA code to be added later. Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-04-15of, numa: Add NUMA of binding implementation.David Daney1-0/+211
Add device tree parsing for NUMA topology using device "numa-node-id" property in distance-map and cpu nodes. This is a complete rewrite of a previous patch by: Ganapatrao Kulkarni<gkulkarni@caviumnetworks.com> Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.