linux-kernel - Re: [RESEND PATCH v5 03/11] KVM: Allow range-based TLB invalidation from common code

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Date:   Wed, 5 Jul 2023 09:54:36 +1000
From:   Gavin Shan <gshan@...hat.com>
To:     Raghavendra Rao Ananta <rananta@...gle.com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Jing Zhang <jingzhangos@...gle.com>,
        Colton Lewis <coltonlewis@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-mips@...r.kernel.org, kvm-riscv@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [RESEND PATCH v5 03/11] KVM: Allow range-based TLB invalidation
 from common code



On 6/22/23 03:49, Raghavendra Rao Ananta wrote:
> From: David Matlack <dmatlack@...gle.com>
> 
> Make kvm_flush_remote_tlbs_range() visible in common code and create a
> default implementation that just invalidates the whole TLB.
> 
> This paves the way for several future features/cleanups:
> 
>   - Introduction of range-based TLBI on ARM.
>   - Eliminating kvm_arch_flush_remote_tlbs_memslot()
>   - Moving the KVM/x86 TDP MMU to common code.
> 
> No functional change intended.
> 
> Signed-off-by: David Matlack <dmatlack@...gle.com>
> Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
> ---
>   arch/x86/include/asm/kvm_host.h |  3 +++
>   arch/x86/kvm/mmu/mmu.c          |  9 ++++-----
>   arch/x86/kvm/mmu/mmu_internal.h |  3 ---
>   include/linux/kvm_host.h        |  9 +++++++++
>   virt/kvm/kvm_main.c             | 13 +++++++++++++
>   5 files changed, 29 insertions(+), 8 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan@...hat.com>

Thanks,
Gavin