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Changing aarch64 pointer authentication algorithm in qemu-user

From: Avi Kivity
Subject: Changing aarch64 pointer authentication algorithm in qemu-user
Date: Sun, 10 Apr 2022 21:05:58 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0
I'm using qemu to cross-build container images with docker. It works well, but aarch64 emulation is slow, due to pointer authentication.
The documentation refers to a pauth-impdef cpu feature to speed it up, but I could not find an example. What is the incantation?
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