Commit 44598fe7 authored by Bibo Mao's avatar Bibo Mao Committed by Huacai Chen
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LoongArch: KVM: Add sign extension with kernel IOCSR read emulation 



Function kvm_complete_iocsr_read() is to add sign extension with IOCSR
read emulation, it is used in user space IOCSR read completion now. Also
it should be used in kernel IOCSR read emulation.

Signed-off-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 80edf908

arch/loongarch/kvm/exit.c

+6 −6
Original line number Diff line number Diff line
@@ -218,16 +218,16 @@ int kvm_emu_iocsr(larch_inst inst, struct kvm_run *run, struct kvm_vcpu *vcpu) 
		}

		trace_kvm_iocsr(KVM_TRACE_IOCSR_WRITE, run->iocsr_io.len, addr, val);

	} else {

		vcpu->arch.io_gpr = rd; /* Set register id for iocsr read completion */

		idx = srcu_read_lock(&vcpu->kvm->srcu);

		ret = kvm_io_bus_read(vcpu, KVM_IOCSR_BUS, addr, run->iocsr_io.len, val);

		ret = kvm_io_bus_read(vcpu, KVM_IOCSR_BUS, addr,

				      run->iocsr_io.len, run->iocsr_io.data);

		srcu_read_unlock(&vcpu->kvm->srcu, idx);

		if (ret == 0)

		if (ret == 0) {

			kvm_complete_iocsr_read(vcpu, run);

			ret = EMULATE_DONE;

		else {

		} else

			ret = EMULATE_DO_IOCSR;

			/* Save register id for iocsr read completion */

			vcpu->arch.io_gpr = rd;

		}

		trace_kvm_iocsr(KVM_TRACE_IOCSR_READ, run->iocsr_io.len, addr, NULL);

	}