[PATCH 0/2] target/loongarch: PV TLB flush advertisement

[Tao Cui <cui.tao@linux.dev>]

From: Tao Cui <cuitao@kylinos.cn>

Advertise the LoongArch paravirtual TLB flush feature (KVM_FEATURE_PV_TLB_FLUSH)
to the guest when the host KVM supports it.  This pairs with the corresponding
KVM/guest-kernel PV TLB flush series posted to the kernel.

Patch 1 syncs the UAPI definitions into linux-headers.
Patch 2 adds the probe, the CPUCFG feature advertisement, and a
kvm-pv-tlb-flush CPU property (on/off/auto, default auto).

The feature is only advertised when the host actually supports it, so a
guest never observes KVM_FEATURE_PV_TLB_FLUSH on a host that cannot
service PV TLB flush requests.

Tao Cui (2):
  linux-headers: Add LoongArch PV TLB flush definitions
  target/loongarch: Enable PV TLB flush advertisement to the guest

 linux-headers/asm-loongarch/kvm.h      |  1 +
 linux-headers/asm-loongarch/kvm_para.h |  1 +
 target/loongarch/cpu.h                 |  2 ++
 target/loongarch/kvm/kvm.c             | 38 ++++++++++++++++++++++++++
 target/loongarch/loongarch-qmp-cmds.c  |  4 +--
 5 files changed, 44 insertions(+), 2 deletions(-)

-- 
2.43.0