The architected pauth algorithm is quite slow without hardware support, and boot times for kernels that enable use of the feature have been significantly impacted.
Version 1 blurb at https://lists.nongnu.org/archive/html/qemu-devel/2020-08/msg02172.html which contains larger study of the tradeoffs. Version 2 changes: * Use boolean properties, for qmp_query_cpu_model_expansion (drjones). * Move XXH64 implementation to xxhash.h (ajb). * Include a small cleanup to parsing the "sve" property that I noticed along the way. Version 3 changes: * Swap order of patches (drjones). * Add properties test case (drjones). r~ Richard Henderson (3): target/arm: Implement an IMPDEF pauth algorithm target/arm: Add cpu properties to control pauth target/arm: Use object_property_add_bool for "sve" property include/qemu/xxhash.h | 82 ++++++++++++++++++++++++++++++++++ target/arm/cpu.h | 25 +++++++++-- target/arm/cpu.c | 13 ++++++ target/arm/cpu64.c | 64 ++++++++++++++++++-------- target/arm/monitor.c | 1 + target/arm/pauth_helper.c | 41 ++++++++++++++--- tests/qtest/arm-cpu-features.c | 13 ++++++ 7 files changed, 212 insertions(+), 27 deletions(-) -- 2.25.1
