From: Sean Christopherson <seanjc@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Raghavendra Rao Ananta <rananta@google.com>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Huacai Chen <chenhuacai@kernel.org>,
Zenghui Yu <yuzenghui@huawei.com>,
Anup Patel <anup@brainfault.org>,
Atish Patra <atishp@atishpatra.org>,
Jing Zhang <jingzhangos@google.com>,
Reiji Watanabe <reijiw@google.com>,
Colton Lewis <coltonlewis@google.com>,
David Matlack <dmatlack@google.com>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Subject: Re: [PATCH v7 02/12] KVM: arm64: Use kvm_arch_flush_remote_tlbs()
Date: Mon, 31 Jul 2023 14:50:07 -0700 [thread overview]
Message-ID: <ZMgsjx8dwKd4xBGe@google.com> (raw)
In-Reply-To: <87tttpr6qy.wl-maz@kernel.org>
On Thu, Jul 27, 2023, Marc Zyngier wrote:
> On Sat, 22 Jul 2023 03:22:41 +0100,
> Raghavendra Rao Ananta <rananta@google.com> wrote:
> >
> > Stop depending on CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL and opt to
> > standardize on kvm_arch_flush_remote_tlbs() since it avoids
> > duplicating the generic TLB stats across architectures that implement
> > their own remote TLB flush.
> >
> > This adds an extra function call to the ARM64 kvm_flush_remote_tlbs()
> > path, but that is a small cost in comparison to flushing remote TLBs.
>
> Well, there is no such thing as a "remote TLB" anyway. We either have
> a non-shareable or inner-shareable invalidation. The notion of remote
> would imply that we track who potentially has a TLB, which we
> obviously don't.
Maybe kvm_arch_flush_vm_tlbs()? The "remote" part is misleading even on x86 when
running on Hyper-V, as the flush may be done via a single hypercall and by kicking
"remote" vCPUs.
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next prev parent reply other threads:[~2023-07-31 21:50 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-22 2:22 [PATCH v7 00/12] KVM: arm64: Add support for FEAT_TLBIRANGE Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 01/12] KVM: Rename kvm_arch_flush_remote_tlb() to kvm_arch_flush_remote_tlbs() Raghavendra Rao Ananta
2023-07-27 10:24 ` Marc Zyngier
2023-07-31 17:21 ` Raghavendra Rao Ananta
2023-07-31 21:42 ` Sean Christopherson
2023-08-01 0:42 ` Raghavendra Rao Ananta
2023-08-02 15:54 ` Marc Zyngier
2023-08-02 16:10 ` Sean Christopherson
2023-08-02 23:30 ` Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 02/12] KVM: arm64: Use kvm_arch_flush_remote_tlbs() Raghavendra Rao Ananta
2023-07-24 9:13 ` Shaoqin Huang
2023-07-27 10:25 ` Marc Zyngier
2023-07-31 21:50 ` Sean Christopherson [this message]
2023-08-02 15:55 ` Marc Zyngier
2023-08-02 23:28 ` Raghavendra Rao Ananta
2023-08-04 18:19 ` Raghavendra Rao Ananta
2023-08-08 15:07 ` Sean Christopherson
2023-08-08 16:19 ` Raghavendra Rao Ananta
2023-08-08 16:43 ` Marc Zyngier
2023-08-08 16:46 ` Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 03/12] KVM: Remove CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL Raghavendra Rao Ananta
2023-07-24 9:13 ` Shaoqin Huang
2023-07-22 2:22 ` [PATCH v7 04/12] KVM: Allow range-based TLB invalidation from common code Raghavendra Rao Ananta
2023-07-31 21:55 ` Sean Christopherson
2023-08-01 0:39 ` Raghavendra Rao Ananta
2023-08-07 4:06 ` Anup Patel
2023-07-22 2:22 ` [PATCH v7 05/12] KVM: Move kvm_arch_flush_remote_tlbs_memslot() to " Raghavendra Rao Ananta
2023-07-27 10:53 ` Marc Zyngier
2023-07-31 17:30 ` Raghavendra Rao Ananta
2023-08-07 4:06 ` Anup Patel
2023-07-22 2:22 ` [PATCH v7 06/12] arm64: tlb: Refactor the core flush algorithm of __flush_tlb_range Raghavendra Rao Ananta
2023-07-27 10:58 ` Marc Zyngier
2023-07-31 17:36 ` Raghavendra Rao Ananta
2023-08-02 15:58 ` Marc Zyngier
2023-08-02 23:31 ` Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 07/12] KVM: arm64: Implement __kvm_tlb_flush_vmid_range() Raghavendra Rao Ananta
2023-07-24 9:21 ` Shaoqin Huang
2023-07-27 12:40 ` Marc Zyngier
2023-07-31 17:45 ` Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 08/12] KVM: arm64: Define kvm_tlb_flush_vmid_range() Raghavendra Rao Ananta
2023-07-27 12:47 ` Marc Zyngier
2023-07-27 13:01 ` Marc Zyngier
2023-07-31 18:01 ` Raghavendra Rao Ananta
2023-08-02 23:25 ` Marc Zyngier
2023-07-22 2:22 ` [PATCH v7 09/12] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range() Raghavendra Rao Ananta
2023-07-27 12:48 ` Marc Zyngier
2023-07-22 2:22 ` [PATCH v7 10/12] KVM: arm64: Flush only the memslot after write-protect Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 11/12] KVM: arm64: Invalidate the table entries upon a range Raghavendra Rao Ananta
2023-07-22 2:22 ` [PATCH v7 12/12] KVM: arm64: Use TLBI range-based intructions for unmap Raghavendra Rao Ananta
2023-07-24 9:34 ` Shaoqin Huang
2023-07-24 16:47 ` Raghavendra Rao Ananta
2023-07-25 2:32 ` Shaoqin Huang
2023-07-25 17:23 ` Raghavendra Rao Ananta
2023-07-26 4:06 ` Shaoqin Huang
2023-07-27 13:12 ` Marc Zyngier
2023-07-31 18:26 ` Raghavendra Rao Ananta
2023-08-02 23:28 ` Marc Zyngier
2023-08-02 23:33 ` Raghavendra Rao Ananta
2023-07-31 21:57 ` [PATCH v7 00/12] KVM: arm64: Add support for FEAT_TLBIRANGE Sean Christopherson
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