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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 10:46:44 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 10:46:44 -0800 |
commit | ca78d3173cff3503bcd15723b049757f75762d15 (patch) | |
tree | 8e5db7a3adbe3bcd3b08e6983a6e0f6becb0aaa0 /drivers/of | |
parent | a4ee7bacd6c08479d56738456c07e4f32fc8e523 (diff) | |
parent | ffe7afd1713558d73483834c2e2d03a1e39a4062 (diff) | |
download | linux-ca78d3173cff3503bcd15723b049757f75762d15.tar.bz2 |
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
- Errata workarounds for Qualcomm's Falkor CPU
- Qualcomm L2 Cache PMU driver
- Qualcomm SMCCC firmware quirk
- Support for DEBUG_VIRTUAL
- CPU feature detection for userspace via MRS emulation
- Preliminary work for the Statistical Profiling Extension
- Misc cleanups and non-critical fixes
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (74 commits)
arm64/kprobes: consistently handle MRS/MSR with XZR
arm64: cpufeature: correctly handle MRS to XZR
arm64: traps: correctly handle MRS/MSR with XZR
arm64: ptrace: add XZR-safe regs accessors
arm64: include asm/assembler.h in entry-ftrace.S
arm64: fix warning about swapper_pg_dir overflow
arm64: Work around Falkor erratum 1003
arm64: head.S: Enable EL1 (host) access to SPE when entered at EL2
arm64: arch_timer: document Hisilicon erratum 161010101
arm64: use is_vmalloc_addr
arm64: use linux/sizes.h for constants
arm64: uaccess: consistently check object sizes
perf: add qcom l2 cache perf events driver
arm64: remove wrong CONFIG_PROC_SYSCTL ifdef
ARM: smccc: Update HVC comment to describe new quirk parameter
arm64: do not trace atomic operations
ACPI/IORT: Fix the error return code in iort_add_smmu_platform_device()
ACPI/IORT: Fix iort_node_get_id() mapping entries indexing
arm64: mm: enable CONFIG_HOLES_IN_ZONE for NUMA
perf: xgene: Include module.h
...
Diffstat (limited to 'drivers/of')
-rw-r--r-- | drivers/of/base.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 84cf2f3f396c..a88387bc0ac1 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -25,6 +25,7 @@ #include <linux/cpu.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/spinlock.h> #include <linux/slab.h> @@ -2268,6 +2269,31 @@ struct device_node *of_find_next_cache_node(const struct device_node *np) } /** + * of_find_last_cache_level - Find the level at which the last cache is + * present for the given logical cpu + * + * @cpu: cpu number(logical index) for which the last cache level is needed + * + * Returns the the level at which the last cache is present. It is exactly + * same as the total number of cache levels for the given logical cpu. + */ +int of_find_last_cache_level(unsigned int cpu) +{ + u32 cache_level = 0; + struct device_node *prev = NULL, *np = of_cpu_device_node_get(cpu); + + while (np) { + prev = np; + of_node_put(np); + np = of_find_next_cache_node(np); + } + + of_property_read_u32(prev, "cache-level", &cache_level); + + return cache_level; +} + +/** * of_graph_parse_endpoint() - parse common endpoint node properties * @node: pointer to endpoint device_node * @endpoint: pointer to the OF endpoint data structure |