2 * Copyright (C) 2015 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <asm/kvm_hyp.h>
19 #include <asm/tlbflush.h>
21 void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
25 /* Switch to requested VMID */
26 kvm = kern_hyp_va(kvm);
27 write_sysreg(kvm->arch.vttbr, vttbr_el2);
31 * We could do so much better if we had the VA as well.
32 * Instead, we invalidate Stage-2 for this IPA, and the
33 * whole of Stage-1. Weep...
36 __tlbi(ipas2e1is, ipa);
39 * We have to ensure completion of the invalidation at Stage-2,
40 * since a table walk on another CPU could refill a TLB with a
41 * complete (S1 + S2) walk based on the old Stage-2 mapping if
42 * the Stage-1 invalidation happened first.
49 write_sysreg(0, vttbr_el2);
52 void __hyp_text __kvm_tlb_flush_vmid(struct kvm *kvm)
56 /* Switch to requested VMID */
57 kvm = kern_hyp_va(kvm);
58 write_sysreg(kvm->arch.vttbr, vttbr_el2);
65 write_sysreg(0, vttbr_el2);
68 void __hyp_text __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu)
70 struct kvm *kvm = kern_hyp_va(kern_hyp_va(vcpu)->kvm);
72 /* Switch to requested VMID */
73 write_sysreg(kvm->arch.vttbr, vttbr_el2);
80 write_sysreg(0, vttbr_el2);
83 void __hyp_text __kvm_flush_vm_context(void)
87 asm volatile("ic ialluis" : : );