1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2012,2013 - ARM Ltd
7  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
82 		return -EINVAL;  in kvm_vcpu_enable_sve()
84 	vcpu->arch.sve_max_vl = kvm_sve_max_vl;  in kvm_vcpu_enable_sve()
98  * vcpu->arch.sve_state as necessary.
107 	vl = vcpu->arch.sve_max_vl;  in kvm_vcpu_finalize_sve()
112 	 * set_sve_vls().  Double-check here just to be sure:  in kvm_vcpu_finalize_sve()
116 		return -EIO;  in kvm_vcpu_finalize_sve()
121 		return -ENOMEM;  in kvm_vcpu_finalize_sve()
129 	vcpu->arch.sve_state = buf;  in kvm_vcpu_finalize_sve()
139 			return -EINVAL;  in kvm_arm_vcpu_finalize()
142 			return -EPERM;  in kvm_arm_vcpu_finalize()
147 	return -EINVAL;  in kvm_arm_vcpu_finalize()
160 	void *sve_state = vcpu->arch.sve_state;  in kvm_arm_vcpu_destroy()
167 	kfree(vcpu->arch.ccsidr);  in kvm_arm_vcpu_destroy()
173 		memset(vcpu->arch.sve_state, 0, vcpu_sve_state_size(vcpu));  in kvm_vcpu_reset_sve()
183 	if (!test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||  in kvm_vcpu_enable_ptrauth()
184 	    !test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features) ||  in kvm_vcpu_enable_ptrauth()
186 		return -EINVAL;  in kvm_vcpu_enable_ptrauth()
193  * kvm_reset_vcpu - sets core registers and sys_regs to reset value
204  * on the memory-backed values of system registers, we want to do a full put if
205  * we were loaded (handling a request) and load the values back at the end of
208  * preempt notifiers which also call put/load.
217 	spin_lock(&vcpu->arch.mp_state_lock);  in kvm_reset_vcpu()
218 	reset_state = vcpu->arch.reset_state;  in kvm_reset_vcpu()
219 	vcpu->arch.reset_state.reset = false;  in kvm_reset_vcpu()
220 	spin_unlock(&vcpu->arch.mp_state_lock);  in kvm_reset_vcpu()
222 	/* Reset PMU outside of the non-preemptible section */  in kvm_reset_vcpu()
226 	loaded = (vcpu->cpu != -1);  in kvm_reset_vcpu()
232 		ret = -EINVAL;  in kvm_reset_vcpu()
237 		if (test_bit(KVM_ARM_VCPU_SVE, vcpu->arch.features)) {  in kvm_reset_vcpu()
246 	if (test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||  in kvm_reset_vcpu()
247 	    test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features)) {  in kvm_reset_vcpu()
249 			ret = -EINVAL;  in kvm_reset_vcpu()
262 		ret = -EINVAL;  in kvm_reset_vcpu()
268 	memset(&vcpu->arch.ctxt.fp_regs, 0, sizeof(vcpu->arch.ctxt.fp_regs));  in kvm_reset_vcpu()
269 	vcpu->arch.ctxt.spsr_abt = 0;  in kvm_reset_vcpu()
270 	vcpu->arch.ctxt.spsr_und = 0;  in kvm_reset_vcpu()
271 	vcpu->arch.ctxt.spsr_irq = 0;  in kvm_reset_vcpu()
272 	vcpu->arch.ctxt.spsr_fiq = 0;  in kvm_reset_vcpu()
273 	vcpu_gp_regs(vcpu)->pstate = pstate;  in kvm_reset_vcpu()
331 	 * Check with ARMv8.5-GTG that our PAGE_SIZE is supported at  in kvm_set_ipa_limit()
332 	 * Stage-2. If not, things will stop very quickly.  in kvm_set_ipa_limit()
336 		kvm_err("PAGE_SIZE not supported at Stage-2, giving up\n");  in kvm_set_ipa_limit()
337 		return -EINVAL;  in kvm_set_ipa_limit()
339 		kvm_debug("PAGE_SIZE supported at Stage-2 (default)\n");  in kvm_set_ipa_limit()
342 		kvm_debug("PAGE_SIZE supported at Stage-2 (advertised)\n");  in kvm_set_ipa_limit()
346 		return -EINVAL;  in kvm_set_ipa_limit()
352 		  " (Reduced IPA size, limited VM/VMM compatibility)" : ""));  in kvm_set_ipa_limit()