Re: [PATCH v4 27/34] KVM: arm64: Always zero invalid PTEs

On Thursday 11 Mar 2021 at 17:33:38 (+0000), Will Deacon wrote:

On Wed, Mar 10, 2021 at 05:57:44PM +0000, Quentin Perret wrote:

quoted

kvm_set_invalid_pte() currently only clears bit 0 from a PTE because
stage2_map_walk_table_post() needs to be able to follow the anchor. In
preparation for re-using bits 63-02 from invalid PTEs, make sure to zero

Why do you exclude bit 1 from this range?

Hmm, no good reason really. I wanted to play games with invalid table
mappings at some point, but dropped the idea and forgot to update the
commit message. My bad, I'll fix it up.

Thanks,
Quentin

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