Commit 7a156e9f authored by James Hogan's avatar James Hogan
Browse files

KVM: MIPS: Drop vm_init() callback 



Now that the commpage doesn't use wired TLB entries, the per-CPU
vm_init() callback is the only work done by kvm_mips_init_vm_percpu().

The trap & emulate implementation doesn't actually need to do anything
from vm_init(), and the future VZ implementation would be better served
by a kvm_arch_hardware_enable callback anyway.

Therefore drop the vm_init() callback entirely, allowing the
kvm_mips_init_vm_percpu() function to also be dropped, along with the
kvm_mips_instance atomic counter.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
parent 4c86460c

arch/mips/include/asm/kvm_host.h

+0 −3
Original line number Diff line number Diff line
@@ -121,8 +121,6 @@ static inline bool kvm_is_error_hva(unsigned long addr) 
	return IS_ERR_VALUE(addr);

}



extern atomic_t kvm_mips_instance;



struct kvm_vm_stat {

	ulong remote_tlb_flush;

};
@@ -528,7 +526,6 @@ struct kvm_mips_callbacks { 
	int (*handle_msa_fpe)(struct kvm_vcpu *vcpu);

	int (*handle_fpe)(struct kvm_vcpu *vcpu);

	int (*handle_msa_disabled)(struct kvm_vcpu *vcpu);

	int (*vm_init)(struct kvm *kvm);

	int (*vcpu_init)(struct kvm_vcpu *vcpu);

	void (*vcpu_uninit)(struct kvm_vcpu *vcpu);

	int (*vcpu_setup)(struct kvm_vcpu *vcpu);

arch/mips/kvm/mips.c

+0 −16
Original line number Diff line number Diff line
@@ -92,22 +92,8 @@ void kvm_arch_check_processor_compat(void *rtn) 
	*(int *)rtn = 0;

}



static void kvm_mips_init_vm_percpu(void *arg)

{

	struct kvm *kvm = (struct kvm *)arg;



	kvm_mips_callbacks->vm_init(kvm);



}



int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)

{

	if (atomic_inc_return(&kvm_mips_instance) == 1) {

		kvm_debug("%s: 1st KVM instance, setup host TLB parameters\n",

			  __func__);

		on_each_cpu(kvm_mips_init_vm_percpu, kvm, 1);

	}



	return 0;

}
@@ -150,8 +136,6 @@ void kvm_mips_free_vcpus(struct kvm *kvm) 
void kvm_arch_destroy_vm(struct kvm *kvm)

{

	kvm_mips_free_vcpus(kvm);



	atomic_dec(&kvm_mips_instance);

}



long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl,

arch/mips/kvm/tlb.c

+0 −3
Original line number Diff line number Diff line
@@ -33,9 +33,6 @@ 
#define KVM_GUEST_PC_TLB    0

#define KVM_GUEST_SP_TLB    1



atomic_t kvm_mips_instance;

EXPORT_SYMBOL_GPL(kvm_mips_instance);



static u32 kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)

{

	struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm;

arch/mips/kvm/trap_emul.c

+0 −6
Original line number Diff line number Diff line
@@ -429,11 +429,6 @@ static int kvm_trap_emul_handle_msa_disabled(struct kvm_vcpu *vcpu) 
	return ret;

}



static int kvm_trap_emul_vm_init(struct kvm *kvm)

{

	return 0;

}



static int kvm_trap_emul_vcpu_init(struct kvm_vcpu *vcpu)

{

	struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm;
@@ -847,7 +842,6 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks = { 
	.handle_fpe = kvm_trap_emul_handle_fpe,

	.handle_msa_disabled = kvm_trap_emul_handle_msa_disabled,



	.vm_init = kvm_trap_emul_vm_init,

	.vcpu_init = kvm_trap_emul_vcpu_init,

	.vcpu_uninit = kvm_trap_emul_vcpu_uninit,

	.vcpu_setup = kvm_trap_emul_vcpu_setup,

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