tlb.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
 4 */
 5
 6#include <linux/kvm_host.h>
 7#include <asm/tlb.h>
 8#include <asm/kvm_csr.h>
 9
10/*
11 * kvm_flush_tlb_all() - Flush all root TLB entries for guests.
12 *
13 * Invalidate all entries including GVA-->GPA and GPA-->HPA mappings.
14 */
15void kvm_flush_tlb_all(void)
16{
17	unsigned long flags;
18
19	local_irq_save(flags);
20	invtlb_all(INVTLB_ALLGID, 0, 0);
21	local_irq_restore(flags);
22}
23
24void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
25{
26	lockdep_assert_irqs_disabled();
27	gpa &= (PAGE_MASK << 1);
28	invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
29}