LoongArch: KVM: Advertise already-supported capabilities

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Several LoongArch KVM features are fully implemented but were never
reported through their standard KVM_CHECK_EXTENSION probes, so userspace
cannot discover them. Advertise the ones that already work so as to have
a real consumer:

  - KVM_CAP_VCPU_ATTRIBUTES: per-vCPU device-attribute ioctls are
    implemented (CPUCFG, PVTIME control); advertise the discovery cap.

  - KVM_CAP_STEAL_TIME: steal time works end-to-end (host-side record
    plus guest-side paravirt), the probe returns kvm_pvtime_supported().

This doesn't add new functionalities; it only makes existing features
discoverable via the standard probe.

Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

...

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Tao Cui 2026-08-10 12:21:50 +08:00 • committed by Huacai Chen

parent db2ddb8714

commit a5518ad7ef

1 changed files with 4 additions and 0 deletions

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arch/loongarch/kvm/vm.c

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