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LoongArch: KVM: Move feature detection in kvm_vm_init_features()

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VM feature detection is sparsed in function kvm_vm_init_features() and
kvm_vm_feature_has_attr(). Here move all the features detection in
function kvm_vm_init_features(), and there is only feature checking in
function kvm_vm_feature_has_attr().

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao
2026-02-06 09:27:46 +08:00
committed by Huacai Chen
parent de0c51370b
commit 82db90bf46
1 changed files with 15 additions and 21 deletions
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36
arch/loongarch/kvm/vm.c
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@@ -29,6 +29,21 @@ static void kvm_vm_init_features(struct kvm *kvm)
{ {
unsigned long val; unsigned long val;
if (cpu_has_lsx)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_LSX);
if (cpu_has_lasx)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_LASX);
if (cpu_has_lbt_x86)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_X86BT);
if (cpu_has_lbt_arm)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_ARMBT);
if (cpu_has_lbt_mips)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_MIPSBT);
if (cpu_has_ptw)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_PTW);
if (cpu_has_msgint)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_MSGINT);
val = read_csr_gcfg(); val = read_csr_gcfg();
if (val & CSR_GCFG_GPMP) if (val & CSR_GCFG_GPMP)
kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_PMU); kvm->arch.kvm_features |= BIT(KVM_LOONGARCH_VM_FEAT_PMU);
@@ -131,33 +146,12 @@ static int kvm_vm_feature_has_attr(struct kvm *kvm, struct kvm_device_attr *attr
{ {
switch (attr->attr) { switch (attr->attr) {
case KVM_LOONGARCH_VM_FEAT_LSX: case KVM_LOONGARCH_VM_FEAT_LSX:
if (cpu_has_lsx)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_LASX: case KVM_LOONGARCH_VM_FEAT_LASX:
if (cpu_has_lasx)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_X86BT: case KVM_LOONGARCH_VM_FEAT_X86BT:
if (cpu_has_lbt_x86)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_ARMBT: case KVM_LOONGARCH_VM_FEAT_ARMBT:
if (cpu_has_lbt_arm)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_MIPSBT: case KVM_LOONGARCH_VM_FEAT_MIPSBT:
if (cpu_has_lbt_mips)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_PTW: case KVM_LOONGARCH_VM_FEAT_PTW:
if (cpu_has_ptw)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_MSGINT: case KVM_LOONGARCH_VM_FEAT_MSGINT:
if (cpu_has_msgint)
return 0;
return -ENXIO;
case KVM_LOONGARCH_VM_FEAT_PMU: case KVM_LOONGARCH_VM_FEAT_PMU:
case KVM_LOONGARCH_VM_FEAT_PV_IPI: case KVM_LOONGARCH_VM_FEAT_PV_IPI:
case KVM_LOONGARCH_VM_FEAT_PV_STEALTIME: case KVM_LOONGARCH_VM_FEAT_PV_STEALTIME: