Commit d7f4ed4b authored by Tianrui Zhao's avatar Tianrui Zhao Committed by Huacai Chen
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LoongArch: KVM: Implement virtual machine tlb operations 



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: default avatarBibo Mao <maobibo@loongson.cn>
Tested-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarTianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent a5857b9f

arch/loongarch/kvm/tlb.c

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+32 −0
Original line number Diff line number Diff line 
// 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);

}