LoongArch: KVM: Add Binary Translation extension support

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Loongson Binary Translation (LBT) is used to accelerate binary translation,
which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags)
and x87 fpu stack pointer (ftop).

Like FPU extension, here a lazy enabling method is used for LBT. the LBT
context is saved/restored on the vcpu context switch path.

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

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Bibo Mao 2024-09-11 23:26:32 +08:00 • committed by Huacai Chen

parent a53f48b632

commit b67ee19a90

4 changed files with 84 additions and 3 deletions

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11

arch/loongarch/include/asm/kvm_host.h

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6

arch/loongarch/include/asm/kvm_vcpu.h

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9

arch/loongarch/kvm/exit.c

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61

arch/loongarch/kvm/vcpu.c

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