This patch doesn't enable cpu hotplug under kvm, but is a prerequiste when the feature is implemented. Once kvm_arch_hardware_enable/disable() is properly implemented, arm64-specific cpu notifier hook, hyp_init_cpu_notify(), will be able to be removed and replaced by generic kvm_cpu_hotplug().
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- arch/arm/kvm/arm.c | 9 +++++++++ arch/arm64/include/asm/kvm_host.h | 1 - 2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index b879cf6..08804d3 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -925,6 +925,10 @@ static int hyp_init_cpu_notify(struct notifier_block *self, if (__hyp_get_vectors() == hyp_default_vectors) cpu_init_hyp_mode(NULL); break; + case CPU_DYING: + case CPU_DYING_FROZEN: + kvm_cpu_reset(NULL); + break; }
return NOTIFY_OK; @@ -1168,6 +1172,11 @@ out_err: return err; }
+void kvm_arch_hardware_disable(void) +{ + kvm_cpu_reset(NULL); +} + /* NOP: Compiling as a module not supported */ void kvm_arch_exit(void) { diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 97f88fe..a97b2fe 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -261,7 +261,6 @@ static inline void vgic_arch_setup(const struct vgic_params *vgic) } }
-static inline void kvm_arch_hardware_disable(void) {} static inline void kvm_arch_hardware_unsetup(void) {} static inline void kvm_arch_sync_events(struct kvm *kvm) {} static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}