linux-kernel - Re: [PATCH v2 0/2] LoongArch: KVM: Do not flush tlb if HW PTW supported

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Message-ID: <CAAhV-H4hry0LfUwbPmURc+bbcAXG13wO2cHfdjcoijeezNhO5Q@mail.gmail.com>
Date: Sat, 17 May 2025 17:41:50 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Bibo Mao <maobibo@...ngson.cn>
Cc: Tianrui Zhao <zhaotianrui@...ngson.cn>, WANG Xuerui <kernel@...0n.name>, kvm@...r.kernel.org, 
	loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] LoongArch: KVM: Do not flush tlb if HW PTW supported

Applied, thanks.

Huacai

On Sun, Apr 27, 2025 at 10:45 AM Bibo Mao <maobibo@...ngson.cn> wrote:
>
> With HW PTW supported, stale TLB is not added if page fault happens. With
> EXCCODE_TLBM exception, stale TLB may exist because last read access, tlb
> flush operation is necessary with EXCCODE_TLBM exception, and not necessary
> with other memory page fault exceptions.
>
> With SW PTW supported, invalid TLB is added in TLB refill exception.
> TLB flush operation is necessary with all page fault exceptions.
>
> ---
>   v1 ... v2:
>     1. Add kernel doc notation since new parameter ecode is added, which is
>        reported from LKP.
> ---
>
> Bibo Mao (2):
>   LoongArch: KVM: Add parameter exception code with exception handler
>   LoongArch: KVM: Do not flush tlb if HW PTW supported
>
>  arch/loongarch/include/asm/kvm_host.h |  2 +-
>  arch/loongarch/include/asm/kvm_vcpu.h |  2 +-
>  arch/loongarch/kvm/exit.c             | 37 ++++++++++++++-------------
>  arch/loongarch/kvm/mmu.c              | 18 ++++++++++---
>  4 files changed, 35 insertions(+), 24 deletions(-)
>
>
> base-commit: 5bc1018675ec28a8a60d83b378d8c3991faa5a27
> --
> 2.39.3
>