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| author | Catalin Marinas <catalin.marinas@arm.com> | 2021-04-15 16:00:47 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-04-15 16:00:47 +0300 |
| commit | 604df13d7aadae6902d3b7f03a35bb21d887f0cf (patch) | |
| tree | 2de6b53968eb32f84484c48bdbe27a8572b07707 /Documentation | |
| parent | a1e1eddef2b5b6d81071e18879ce7d05011cf87a (diff) | |
| parent | e80a76aa1a91018d919d2210366943f9bf17009e (diff) | |
| download | linux-604df13d7aadae6902d3b7f03a35bb21d887f0cf.tar.xz | |
Merge branch 'for-next/mte-async-kernel-mode' into for-next/core
* for-next/mte-async-kernel-mode:
: Add MTE asynchronous kernel mode support
kasan, arm64: tests supports for HW_TAGS async mode
arm64: mte: Report async tag faults before suspend
arm64: mte: Enable async tag check fault
arm64: mte: Conditionally compile mte_enable_kernel_*()
arm64: mte: Enable TCO in functions that can read beyond buffer limits
kasan: Add report for async mode
arm64: mte: Drop arch_enable_tagging()
kasan: Add KASAN mode kernel parameter
arm64: mte: Add asynchronous mode support
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/dev-tools/kasan.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index ddf4239a5890..6f6ab3ed7b79 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -161,6 +161,15 @@ particular KASAN features. - ``kasan=off`` or ``=on`` controls whether KASAN is enabled (default: ``on``). +- ``kasan.mode=sync`` or ``=async`` controls whether KASAN is configured in + synchronous or asynchronous mode of execution (default: ``sync``). + Synchronous mode: a bad access is detected immediately when a tag + check fault occurs. + Asynchronous mode: a bad access detection is delayed. When a tag check + fault occurs, the information is stored in hardware (in the TFSR_EL1 + register for arm64). The kernel periodically checks the hardware and + only reports tag faults during these checks. + - ``kasan.stacktrace=off`` or ``=on`` disables or enables alloc and free stack traces collection (default: ``on``). |