KVM: LoongArch: selftests: Add cpucfg read/write helpers

Add helper macros and functions to read and write CPU configuration
registers (cpucfg) from the guest and from the VMM. This interface is
required in upcoming selftests for querying and setting CPU features,
such as PMU capabilities.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Song Gao 2026-04-09 18:56:37 +08:00 • committed by Huacai Chen
commit fa19ea9a7b
2 changed files with 19 additions and 0 deletions