KVM: arm/arm64: Add hook for arch-specific KVM initialisation
This patch adds a kvm_arm_init_arch_resources() hook to perform subarch-specific initialisation when starting up KVM. This will be used in a subsequent patch for global SVE-related setup on arm64. No functional change. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Julien Thierry <julien.thierry@arm.com> Tested-by: zhang.lei <zhang.lei@jp.fujitsu.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>hifive-unleashed-5.2
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@ -53,6 +53,8 @@
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DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
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DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
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static inline int kvm_arm_init_arch_resources(void) { return 0; }
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u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
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u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
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int __attribute_const__ kvm_target_cpu(void);
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int __attribute_const__ kvm_target_cpu(void);
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
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@ -58,6 +58,8 @@
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DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
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DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
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static inline int kvm_arm_init_arch_resources(void) { return 0; }
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int __attribute_const__ kvm_target_cpu(void);
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int __attribute_const__ kvm_target_cpu(void);
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
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int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext);
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int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext);
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@ -1664,6 +1664,10 @@ int kvm_arch_init(void *opaque)
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if (err)
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if (err)
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return err;
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return err;
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err = kvm_arm_init_arch_resources();
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if (err)
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return err;
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if (!in_hyp_mode) {
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if (!in_hyp_mode) {
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err = init_hyp_mode();
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err = init_hyp_mode();
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if (err)
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if (err)
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