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kvm: arm/arm64: Allow arch specific configurations for VM

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Allow the arch backends to perform VM specific initialisation.
This will be later used to handle IPA size configuration and per-VM
VTCR configuration on arm64.

Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Suzuki K Poulose 2018-09-26 17:32:42 +01:00 committed by Marc Zyngier
parent b2df44ffba
commit 5b6c6742b5
4 changed files with 19 additions and 2 deletions
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7
arch/arm/include/asm/kvm_host.h
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@ -354,4 +354,11 @@ static inline void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu) {}
struct kvm *kvm_arch_alloc_vm(void); struct kvm *kvm_arch_alloc_vm(void);
void kvm_arch_free_vm(struct kvm *kvm); void kvm_arch_free_vm(struct kvm *kvm);
static inline int kvm_arm_config_vm(struct kvm *kvm, unsigned long type)
{
if (type)
return -EINVAL;
return 0;
}
#endif /* __ARM_KVM_HOST_H__ */ #endif /* __ARM_KVM_HOST_H__ */

2
arch/arm64/include/asm/kvm_host.h
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@ -513,4 +513,6 @@ void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu);
struct kvm *kvm_arch_alloc_vm(void); struct kvm *kvm_arch_alloc_vm(void);
void kvm_arch_free_vm(struct kvm *kvm); void kvm_arch_free_vm(struct kvm *kvm);
int kvm_arm_config_vm(struct kvm *kvm, unsigned long type);
#endif /* __ARM64_KVM_HOST_H__ */ #endif /* __ARM64_KVM_HOST_H__ */

7
arch/arm64/kvm/reset.c
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@ -133,3 +133,10 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
/* Reset timer */ /* Reset timer */
return kvm_timer_vcpu_reset(vcpu); return kvm_timer_vcpu_reset(vcpu);
} }
int kvm_arm_config_vm(struct kvm *kvm, unsigned long type)
{
if (type)
return -EINVAL;
return 0;
}

5
virt/kvm/arm/arm.c
View File

@ -120,8 +120,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{ {
int ret, cpu; int ret, cpu;
if (type) ret = kvm_arm_config_vm(kvm, type);
return -EINVAL; if (ret)
return ret;
kvm->arch.last_vcpu_ran = alloc_percpu(typeof(*kvm->arch.last_vcpu_ran)); kvm->arch.last_vcpu_ran = alloc_percpu(typeof(*kvm->arch.last_vcpu_ran));
if (!kvm->arch.last_vcpu_ran) if (!kvm->arch.last_vcpu_ran)