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LoongArch: KVM: Implement virtual machine tlb operations

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Implement LoongArch virtual machine tlb operations such as flush tlb by
specific gpa parameter and flush all of the virtual machine's tlbs.

Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Tested-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Tianrui Zhao
2023-10-02 10:01:28 +08:00
committed by Huacai Chen
parent a5857b9ff6
commit d7f4ed4b22
1 changed files with 32 additions and 0 deletions
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32
arch/loongarch/kvm/tlb.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020-2023 Loongson Technology Corporation Limited
*/
#include <linux/kvm_host.h>
#include <asm/tlb.h>
#include <asm/kvm_csr.h>
/*
* kvm_flush_tlb_all() - Flush all root TLB entries for guests.
*
* Invalidate all entries including GVA-->GPA and GPA-->HPA mappings.
*/
void kvm_flush_tlb_all(void)
{
unsigned long flags;
local_irq_save(flags);
invtlb_all(INVTLB_ALLGID, 0, 0);
local_irq_restore(flags);
}
void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
{
unsigned long flags;
local_irq_save(flags);
gpa &= (PAGE_MASK << 1);
invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
local_irq_restore(flags);
}