kvm: use kvfree() in kvm_arch_free_vm()

By switching from kfree() to kvfree() in kvm_arch_free_vm() Arm64 can
use the common variant. This can be accomplished by adding another
macro __KVM_HAVE_ARCH_VM_FREE, which will be used only by x86 for now.

Further simplification can be achieved by adding __kvm_arch_free_vm()
doing the common part.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-Id: <20210903130808.30142-5-jgross@suse.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f8be56d..369c30e 100644 (file)
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -771,7 +771,6 @@ int kvm_set_ipa_limit(void);
 
 #define __KVM_HAVE_ARCH_VM_ALLOC
 struct kvm *kvm_arch_alloc_vm(void);
-void kvm_arch_free_vm(struct kvm *kvm);
 
 int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type);
 

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fe102cd..7838e9f 100644 (file)
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -297,14 +297,6 @@ struct kvm *kvm_arch_alloc_vm(void)
        return vzalloc(sizeof(struct kvm));
 }
 
-void kvm_arch_free_vm(struct kvm *kvm)
-{
-       if (!has_vhe())
-               kfree(kvm);
-       else
-               vfree(kvm);
-}
-
 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 {
        if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 8470d46..1b28029 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1540,6 +1540,8 @@ static inline struct kvm *kvm_arch_alloc_vm(void)
 {
        return __vmalloc(kvm_x86_ops.vm_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
 }
+
+#define __KVM_HAVE_ARCH_VM_FREE
 void kvm_arch_free_vm(struct kvm *kvm);
 
 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 79535fe..03091a2 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -11130,7 +11130,7 @@ void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
 void kvm_arch_free_vm(struct kvm *kvm)
 {
        kfree(to_kvm_hv(kvm)->hv_pa_pg);
-       vfree(kvm);
+       __kvm_arch_free_vm(kvm);
 }
 
 

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 3f87d6a..60a35d9 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1081,10 +1081,17 @@ static inline struct kvm *kvm_arch_alloc_vm(void)
 {
        return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 }
+#endif
+
+static inline void __kvm_arch_free_vm(struct kvm *kvm)
+{
+       kvfree(kvm);
+}
 
+#ifndef __KVM_HAVE_ARCH_VM_FREE
 static inline void kvm_arch_free_vm(struct kvm *kvm)
 {
-       kfree(kvm);
+       __kvm_arch_free_vm(kvm);
 }
 #endif