From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>, Wanpeng Li <kernellwp@gmail.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Wanpeng Li" <wanpeng.li@hotmail.com>
Subject: Re: [PATCH v8 4/4] KVM: X86: Add flush_on_enter before guest enter
Date: Wed, 13 Dec 2017 14:32:48 +0100 [thread overview]
Message-ID: <b4514403-a3ee-3d2f-e4c3-a56419fc90f5@redhat.com> (raw)
In-Reply-To: <20171213125446.bx34qaj3sg6z32xu@hirez.programming.kicks-ass.net>
On 13/12/2017 13:54, Peter Zijlstra wrote:
>> + ++vcpu->stat.tlb_flush;
>> + kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa);
>
> WRT to PTI; how much does this actually invalidate? Does this invalidate
> the _entire_ guest TLB, or only the current guest PCID?
All the PCIDs.
Paolo
next prev parent reply other threads:[~2017-12-13 13:32 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-13 1:33 [PATCH v8 0/4] KVM: X86: Add Paravirt TLB Shootdown Wanpeng Li
2017-12-13 1:33 ` [PATCH v8 1/4] KVM: X86: Add vCPU running/preempted state Wanpeng Li
2017-12-13 10:20 ` David Hildenbrand
2017-12-13 11:38 ` Wanpeng Li
2017-12-13 11:45 ` David Hildenbrand
2017-12-13 12:31 ` Paolo Bonzini
2017-12-13 1:33 ` [PATCH v8 2/4] KVM: X86: Add Paravirt TLB Shootdown Wanpeng Li
2017-12-13 12:33 ` Paolo Bonzini
2017-12-13 1:33 ` [PATCH v8 3/4] KVM: X86: introduce invalidate_gpa argument to tlb flush Wanpeng Li
2017-12-13 13:35 ` Peter Zijlstra
2017-12-13 1:33 ` [PATCH v8 4/4] KVM: X86: Add flush_on_enter before guest enter Wanpeng Li
2017-12-13 12:54 ` Peter Zijlstra
2017-12-13 13:32 ` Paolo Bonzini [this message]
2017-12-13 13:35 ` Peter Zijlstra
2017-12-13 13:37 ` Paolo Bonzini
2017-12-13 9:42 ` [PATCH v8 0/4] KVM: X86: Add Paravirt TLB Shootdown Wanpeng Li
2017-12-13 12:47 ` Paolo Bonzini
2017-12-13 13:13 ` Wanpeng Li
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