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
128 		return -EINVAL;  in kvm_vcpu_enable_sve()
132 		return -EINVAL;  in kvm_vcpu_enable_sve()
134 	vcpu->arch.sve_max_vl = kvm_sve_max_vl;  in kvm_vcpu_enable_sve()
141 	vcpu->arch.flags |= KVM_ARM64_GUEST_HAS_SVE;  in kvm_vcpu_enable_sve()
148  * vcpu->arch.sve_state as necessary.
155 	vl = vcpu->arch.sve_max_vl;  in kvm_vcpu_finalize_sve()
158 	 * Responsibility for these properties is shared between  in kvm_vcpu_finalize_sve()
160 	 * set_sve_vls().  Double-check here just to be sure:  in kvm_vcpu_finalize_sve()
164 		return -EIO;  in kvm_vcpu_finalize_sve()
168 		return -ENOMEM;  in kvm_vcpu_finalize_sve()
170 	vcpu->arch.sve_state = buf;  in kvm_vcpu_finalize_sve()
171 	vcpu->arch.flags |= KVM_ARM64_VCPU_SVE_FINALIZED;  in kvm_vcpu_finalize_sve()
180 			return -EINVAL;  in kvm_arm_vcpu_finalize()
183 			return -EPERM;  in kvm_arm_vcpu_finalize()
188 	return -EINVAL;  in kvm_arm_vcpu_finalize()
201 	kfree(vcpu->arch.sve_state);  in kvm_arm_vcpu_destroy()
207 		memset(vcpu->arch.sve_state, 0, vcpu_sve_state_size(vcpu));  in kvm_vcpu_reset_sve()
217 	if (!test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||  in kvm_vcpu_enable_ptrauth()
218 	    !test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features) ||  in kvm_vcpu_enable_ptrauth()
220 		return -EINVAL;  in kvm_vcpu_enable_ptrauth()
222 	vcpu->arch.flags |= KVM_ARM64_GUEST_HAS_PTRAUTH;  in kvm_vcpu_enable_ptrauth()
227  * kvm_reset_vcpu - sets core registers and sys_regs to reset value
239  * on the memory-backed values of system registers, we want to do a full put if
251 	/* Reset PMU outside of the non-preemptible section */  in kvm_reset_vcpu()
255 	loaded = (vcpu->cpu != -1);  in kvm_reset_vcpu()
260 		if (test_bit(KVM_ARM_VCPU_SVE, vcpu->arch.features)) {  in kvm_reset_vcpu()
269 	if (test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||  in kvm_reset_vcpu()
270 	    test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features)) {  in kvm_reset_vcpu()
272 			ret = -EINVAL;  in kvm_reset_vcpu()
277 	switch (vcpu->arch.target) {  in kvm_reset_vcpu()
279 		if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) {  in kvm_reset_vcpu()
281 				ret = -EINVAL;  in kvm_reset_vcpu()
294 	vcpu_gp_regs(vcpu)->pstate = pstate;  in kvm_reset_vcpu()
303 	if (vcpu->arch.reset_state.reset) {  in kvm_reset_vcpu()
304 		unsigned long target_pc = vcpu->arch.reset_state.pc;  in kvm_reset_vcpu()
313 		if (vcpu->arch.reset_state.be)  in kvm_reset_vcpu()
317 		vcpu_set_reg(vcpu, 0, vcpu->arch.reset_state.r0);  in kvm_reset_vcpu()
319 		vcpu->arch.reset_state.reset = false;  in kvm_reset_vcpu()
346 	 * Check with ARMv8.5-GTG that our PAGE_SIZE is supported at  in kvm_set_ipa_limit()
347 	 * Stage-2. If not, things will stop very quickly.  in kvm_set_ipa_limit()
365 		kvm_err("PAGE_SIZE not supported at Stage-2, giving up\n");  in kvm_set_ipa_limit()
366 		return -EINVAL;  in kvm_set_ipa_limit()
368 		kvm_debug("PAGE_SIZE supported at Stage-2 (default)\n");  in kvm_set_ipa_limit()
371 		kvm_debug("PAGE_SIZE supported at Stage-2 (advertised)\n");  in kvm_set_ipa_limit()
377 	     "KVM IPA Size Limit (%d bits) is smaller than default size\n",  in kvm_set_ipa_limit()
379 	kvm_info("IPA Size Limit: %d bits\n", kvm_ipa_limit);  in kvm_set_ipa_limit()
399 		return -EINVAL;  in kvm_arm_setup_stage2()
405 			return -EINVAL;  in kvm_arm_setup_stage2()
438 	kvm->arch.vtcr = vtcr;  in kvm_arm_setup_stage2()