diff options
| author | Jon Medhurst <tixy@linaro.org> | 2014-04-09 18:54:07 +0100 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2014-04-09 18:54:07 +0100 |
| commit | 14932583c110b83f1cee6a2a1bad0ac43c0eb9f9 (patch) | |
| tree | fb7b05d96f62dcdb23e8182005e332b3c673aca3 /Documentation | |
| parent | c6f0fb3ccca2fcb546bc80a78875ce063b9cbb8b (diff) | |
| parent | ebf81a938dade3b450eb11c57fa744cfac4b523f (diff) | |
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into test
- Documentation clarification on CPU topology and booting requirements
- Additional cache flushing during boot (needed in the presence of
external caches or under virtualisation)
- DMA range invalidation fix for non cache line aligned buffers
- Build failure fix with !COMPAT
- Kconfig update for STRICT_DEVMEM
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm64/booting.txt | 10 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/arm/topology.txt | 7 |
2 files changed, 12 insertions, 5 deletions
diff --git a/Documentation/arm64/booting.txt b/Documentation/arm64/booting.txt index a9691cc48fe..beb754e87c6 100644 --- a/Documentation/arm64/booting.txt +++ b/Documentation/arm64/booting.txt @@ -111,8 +111,14 @@ Before jumping into the kernel, the following conditions must be met: - Caches, MMUs The MMU must be off. Instruction cache may be on or off. - Data cache must be off and invalidated. - External caches (if present) must be configured and disabled. + The address range corresponding to the loaded kernel image must be + cleaned to the PoC. In the presence of a system cache or other + coherent masters with caches enabled, this will typically require + cache maintenance by VA rather than set/way operations. + System caches which respect the architected cache maintenance by VA + operations must be configured and may be enabled. + System caches which do not respect architected cache maintenance by VA + operations (not recommended) must be configured and disabled. - Architected timers CNTFRQ must be programmed with the timer frequency and CNTVOFF must diff --git a/Documentation/devicetree/bindings/arm/topology.txt b/Documentation/devicetree/bindings/arm/topology.txt index 4aa20e7a424..1061faf5f60 100644 --- a/Documentation/devicetree/bindings/arm/topology.txt +++ b/Documentation/devicetree/bindings/arm/topology.txt @@ -75,9 +75,10 @@ The cpu-map node can only contain three types of child nodes: whose bindings are described in paragraph 3. -The nodes describing the CPU topology (cluster/core/thread) can only be -defined within the cpu-map node. -Any other configuration is consider invalid and therefore must be ignored. +The nodes describing the CPU topology (cluster/core/thread) can only +be defined within the cpu-map node and every core/thread in the system +must be defined within the topology. Any other configuration is +invalid and therefore must be ignored. =========================================== 2.1 - cpu-map child nodes naming convention |