On 24/01/2019 16:32, James Morse wrote:

On systems with VHE the kernel and KVM's world-switch code run at the
same exception level. Code that is only used on a VHE system does not
need to be annotated as __hyp_text as it can reside anywhere in the
kernel text.

__hyp_text was also used to prevent kprobes from patching breakpoint
instructions into this region, as this code runs at a different
exception level. While this is no longer true with VHE, KVM still
switches VBAR_EL1, meaning a kprobe's breakpoint executed in the
world-switch code will cause a hyp-panic.

[...]

For what it is worth, I've now queued this patch as a fix for 5.0.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...

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