Re: [PATCH 1/3] KVM: PPC: Book3S HV: Always save guest pmu for guest capable of nesting

Suraj Jitindar Singh [off-list ref] writes:

On Sat, 2019-07-13 at 13:47 +1000, Michael Ellerman wrote:

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Suraj Jitindar Singh [off-list ref] writes:

...

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Fixes: 95a6432ce903 "KVM: PPC: Book3S HV: Streamlined guest
entry/exit path on P9 for radix guests"

I'm not clear why this and the next commit are marked as fixing the
above commit. Wasn't it broken prior to that commit as well?

That was the commit which introduced the entry path which we use for a
nested guest, the path on which we need to be saving and restoring the
pmu registers and so where the new code was introduced.

OK, I thought that commit was an unrelated optimisation. Agree that is a
good target if it is the commit that introduced the nested path.

cheers