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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>
This commit is contained in:
Dave Martin 2019-02-28 18:33:00 +00:00 committed by Marc Zyngier
parent ead9e430c0
commit 0f062bfe36
3 changed files with 8 additions and 0 deletions
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2
arch/arm/include/asm/kvm_host.h
View File

@ -53,6 +53,8 @@
DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
static inline int kvm_arm_init_arch_resources(void) { return 0; }
u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);

2
arch/arm64/include/asm/kvm_host.h
View File

@ -58,6 +58,8 @@
DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
static inline int kvm_arm_init_arch_resources(void) { return 0; }
int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext);

4
virt/kvm/arm/arm.c
View File

@ -1664,6 +1664,10 @@ int kvm_arch_init(void *opaque)
if (err)
return err;
err = kvm_arm_init_arch_resources();
if (err)
return err;
if (!in_hyp_mode) {
err = init_hyp_mode();
if (err)