From: Dave Martin <Dave.Martin@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Julien Thierry <julien.thierry@xxxxxxx>
Tested-by: zhang.lei <zhang.lei@xxxxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
arch/arm/include/asm/kvm_host.h | 2 ++
arch/arm64/include/asm/kvm_host.h | 2 ++
virt/kvm/arm/arm.c | 4 ++++
3 files changed, 8 insertions(+)
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 770d73257ad9..a49ee01242ff 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -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);
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 205438a108f6..3e8950942591 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -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);
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 99c37384ba7b..c69e1370a5dc 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -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)
--
2.20.1
