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authorLai Jiangshan <laijs@linux.alibaba.com>2020-05-29 23:27:32 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 15:15:21 +0200
commitfdef24dfccb7be06e6ebe11d6c6c56987421870f (patch)
tree1f3f6923203775c98c9c1913676e0f8f4afb5d89 /arch/x86/include
parentf9fe0b89f05441c6e4034e024c2c75a0d93024c1 (diff)
x86/hw_breakpoint: Prevent data breakpoints on user_pcid_flush_mask
The per-CPU user_pcid_flush_mask is used in the low level entry code. A data breakpoint can cause #DB recursion. Protect the full cpu_tlbstate structure for simplicity. Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200526014221.2119-5-laijs@linux.alibaba.com Link: https://lkml.kernel.org/r/20200529213320.955117574@infradead.org
Diffstat (limited to 'arch/x86/include')
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