x86/kvm/x86.c

175 	u32 msrs[KVM_MAX_NR_USER_RETURN_MSRS];
301 	struct kvm_user_return_msrs *msrs
311 	if (msrs->registered) {
312 		msrs->registered = false;
317 		values = &msrs->values[slot];
319 			wrmsrl(user_return_msrs_global.msrs[slot], values->host);
344 	user_return_msrs_global.msrs[slot] = msr;
353 	struct kvm_user_return_msrs *msrs = per_cpu_ptr(user_return_msrs, cpu);
358 		rdmsrl_safe(user_return_msrs_global.msrs[i], &value);
359 		msrs->values[i].host = value;
360 		msrs->values[i].curr = value;
367 	struct kvm_user_return_msrs *msrs = per_cpu_ptr(user_return_msrs, cpu);
370 	value = (value & mask) | (msrs->values[slot].host & ~mask);
371 	if (value == msrs->values[slot].curr)
373 	err = wrmsrl_safe(user_return_msrs_global.msrs[slot], value);
377 	msrs->values[slot].curr = value;
378 	if (!msrs->registered) {
379 		msrs->urn.on_user_return = kvm_on_user_return;
380 		user_return_notifier_register(&msrs->urn);
381 		msrs->registered = true;
390 	struct kvm_user_return_msrs *msrs = per_cpu_ptr(user_return_msrs, cpu);
392 	if (msrs->registered)
393 		kvm_on_user_return(&msrs->urn);
3687  * Read or write a bunch of msrs. All parameters are kernel addresses.
3689  * @return number of msrs set successfully.
3691 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
3698 	for (i = 0; i < msrs->nmsrs; ++i)
3706  * Read or write a bunch of msrs. Parameters are user addresses.
3708  * @return number of msrs set successfully.
3715 	struct kvm_msrs msrs;
3721 	if (copy_from_user(&msrs, user_msrs, sizeof(msrs)))
3725 	if (msrs.nmsrs >= MAX_IO_MSRS)
3728 	size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
3735 	r = n = __msr_io(vcpu, &msrs, entries, do_msr);