Commit ed51862f authored by Alexander Graf's avatar Alexander Graf Committed by Paolo Bonzini
Browse files

kvm: Add support for arch compat vm ioctls 



We will introduce the first architecture specific compat vm ioctl in the
next patch. Add all necessary boilerplate to allow architectures to
override compat vm ioctls when necessary.

Signed-off-by: default avatarAlexander Graf <graf@amazon.com>
Message-Id: <20221017184541.2658-2-graf@amazon.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 21e60759

include/linux/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -1390,6 +1390,8 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm, 
			    struct kvm_enable_cap *cap);

long kvm_arch_vm_ioctl(struct file *filp,

		       unsigned int ioctl, unsigned long arg);

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

			      unsigned long arg);



int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);

int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);

virt/kvm/kvm_main.c

+11 −0
Original line number Diff line number Diff line
@@ -4839,6 +4839,12 @@ struct compat_kvm_clear_dirty_log { 
	};

};



long __weak kvm_arch_vm_compat_ioctl(struct file *filp, unsigned int ioctl,

				     unsigned long arg)

{

	return -ENOTTY;

}



static long kvm_vm_compat_ioctl(struct file *filp,

			   unsigned int ioctl, unsigned long arg)

{
@@ -4847,6 +4853,11 @@ static long kvm_vm_compat_ioctl(struct file *filp, 


	if (kvm->mm != current->mm || kvm->vm_dead)

		return -EIO;



	r = kvm_arch_vm_compat_ioctl(filp, ioctl, arg);

	if (r != -ENOTTY)

		return r;



	switch (ioctl) {

#ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT

	case KVM_CLEAR_DIRTY_LOG: {