LoongArch: KVM: Add PV steal time support in host side

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Add ParaVirt steal time feature in host side, VM can search supported
features provided by KVM hypervisor, a feature KVM_FEATURE_STEAL_TIME
is added here. Like x86, steal time structure is saved in guest memory,
one hypercall function KVM_HCALL_FUNC_NOTIFY is added to notify KVM to
enable this feature.

One CPU attr ioctl command KVM_LOONGARCH_VCPU_PVTIME_CTRL is added to
save and restore the base address of steal time structure when a VM is
migrated.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

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This commit is contained in:

Bibo Mao 2024-07-09 16:25:51 +08:00 • committed by Huacai Chen

parent d7ad41a31d

commit b4ba157044

8 changed files with 189 additions and 4 deletions

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8

arch/loongarch/include/asm/kvm_host.h

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11

arch/loongarch/include/asm/kvm_para.h

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5

arch/loongarch/include/asm/kvm_vcpu.h

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1

arch/loongarch/include/asm/loongarch.h

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4

arch/loongarch/include/uapi/asm/kvm.h

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1

arch/loongarch/kvm/Kconfig

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38

arch/loongarch/kvm/exit.c

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125

arch/loongarch/kvm/vcpu.c

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