qemu-system-aarch64 default pointer authentication (QARMA5) is expensive, we spent up to 50% of the emulation time running it (when using TCG).
Switching to pauth-impdef=on is often given as a solution to speed up execution. Thus we talked about making it the new default. The first patch introduce a new property (pauth-qarma5) to allow to select current default algorithm. The second one change the default. The third one updates documentation. v2: - ensure we don't break migration compatibility, by using a specific backward compatible property. - added some documentation about migration for arm virt machine model. Pierrick Bouvier (3): target/arm: add new property to select pauth-qarma5 target/arm: change default pauth algorithm to impdef docs/system/arm/virt: mention specific migration information docs/system/arm/cpu-features.rst | 7 ++++-- docs/system/arm/virt.rst | 14 +++++++++--- docs/system/introduction.rst | 2 +- target/arm/cpu.h | 4 ++++ hw/core/machine.c | 4 +++- target/arm/arm-qmp-cmds.c | 2 +- target/arm/cpu.c | 2 ++ target/arm/cpu64.c | 38 +++++++++++++++++++++++--------- tests/qtest/arm-cpu-features.c | 15 +++++++++---- 9 files changed, 66 insertions(+), 22 deletions(-) -- 2.39.5
