Messages in this thread | | | Date | Thu, 03 Dec 2020 11:45:24 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH 0/3] arm64:msr: Add MSR driver |
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On 2020-12-03 11:25, Rongwei Wang wrote: >> 2020年12月3日 下午4:35,Marc Zyngier <maz@kernel.org> 写道:
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>> But what does it mean to change random system registers while the >> kernel >> itself is using them in parallel? All you are introducing is a bunch >> of >> uncontrolled, unexpected, and possibly fatal side effects. > This problem exists when writing to a register, but it does not exist > when reading a register.
If you're not aware that the ARM architecture does have system registers with read side-effects, you really shouldn't be writing this code.
M. -- Jazz is not dead. It just smells funny...
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