1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
5 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
7 * Mostly rewritten in C by Marc Zyngier <marc.zyngier@arm.com>
10 #include <asm/kvm_hyp.h>
11 #include <asm/kvm_mmu.h>
16 * __kvm_tlb_flush_vmid(struct kvm *kvm);
18 * We rely on the hardware to broadcast the TLB invalidation to all CPUs
19 * inside the inner-shareable domain (which is the case for all v7
20 * implementations). If we come across a non-IS SMP implementation, we'll
21 * have to use an IPI based mechanism. Until then, we stick to the simple
22 * hardware assisted version.
24 * As v7 does not support flushing per IPA, just nuke the whole TLB
25 * instead, ignoring the ipa value.
27 void __hyp_text __kvm_tlb_flush_vmid(struct kvm *kvm)
31 /* Switch to requested VMID */
32 kvm = kern_hyp_va(kvm);
33 write_sysreg(kvm_get_vttbr(kvm), VTTBR);
36 write_sysreg(0, TLBIALLIS);
40 write_sysreg(0, VTTBR);
43 void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
45 __kvm_tlb_flush_vmid(kvm);
48 void __hyp_text __kvm_flush_cpu_context(struct kvm_vcpu *vcpu)
50 struct kvm *kvm = kern_hyp_va(kern_hyp_va(vcpu)->kvm);
52 /* Switch to requested VMID */
53 write_sysreg(kvm_get_vttbr(kvm), VTTBR);
56 write_sysreg(0, TLBIALL);
57 write_sysreg(0, ICIALLU);
61 write_sysreg(0, VTTBR);
64 void __hyp_text __kvm_flush_vm_context(void)
66 write_sysreg(0, TLBIALLNSNHIS);
67 write_sysreg(0, ICIALLUIS);