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SubjectRe: [PATCH 0/3] arm64:msr: Add MSR driver
On Tue, Dec 01, 2020 at 11:17:39PM +0800, Rongwei Wang wrote:
> In ARM, the system registers can only be accessed through msr and mrs,
> so the problem created by MSR driver (depend on rdmsr and wrmsr) in
> x86 is not necessarily present in ARM, which is very different from
> x86.

No, the point I'm making is that it doesn't matter what the architecture
does or does not, register *writes* from userspace are a bad bad idea
for the reasons I described.


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