All of lore.kernel.org
 help / color / mirror / Atom feed
From: Paolo Bonzini <pbonzini@redhat.com>
To: Xiaoyao Li <xiaoyao.li@intel.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 7/7] KVM: VMX: Only context switch some PT MSRs when they exist
Date: Mon, 18 Oct 2021 17:20:48 +0200	[thread overview]
Message-ID: <96d0ff43-9b25-5f07-3fe8-7bd245ce06e4@redhat.com> (raw)
In-Reply-To: <d54269db-d0ea-bcc3-935f-d29eb7c7d039@intel.com>

On 18/10/21 16:04, Xiaoyao Li wrote:
>>
>> If intel_pt_validate_hw_cap is not fast enough, it should be optimized.
>> Something like this:
> 
> If I understand correctly, you mean we don't need to cache the existence 
> with two variable, right?
> 

Yes, exactly.

Paolo


  reply	other threads:[~2021-10-18 15:21 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27  7:02 [PATCH v2 0/7] KVM: VMX: PT (processor trace) optimization cleanup and fixes Xiaoyao Li
2021-08-27  7:02 ` [PATCH v2 1/7] KVM: VMX: Restore host's MSR_IA32_RTIT_CTL when it's not zero Xiaoyao Li
2021-08-27  7:02 ` [PATCH v2 2/7] KVM: VMX: Use precomputed vmx->pt_desc.addr_range Xiaoyao Li
2021-08-27  7:02 ` [PATCH v2 3/7] KVM: VMX: Rename pt_desc.addr_range to pt_desc.nr_addr_range Xiaoyao Li
2021-10-18 12:41   ` Paolo Bonzini
2021-08-27  7:02 ` [PATCH v2 4/7] KVM: VMX: RTIT_CTL_BRANCH_EN has no dependency on other CPUID bit Xiaoyao Li
2021-08-27  7:02 ` [PATCH v2 5/7] KVM: VMX: Disallow PT MSRs accessing if PT is not exposed to guest Xiaoyao Li
2021-10-18 12:46   ` Paolo Bonzini
2021-08-27  7:02 ` [PATCH v2 6/7] KVM: VMX: Check Intel PT related CPUID leaves Xiaoyao Li
2021-09-09 21:41   ` Sean Christopherson
2021-09-10  1:59     ` Xiaoyao Li
2021-10-18  7:01       ` Xiaoyao Li
2021-10-18 12:47       ` Paolo Bonzini
2021-10-18 13:56         ` Xiaoyao Li
2021-10-18 17:26           ` Sean Christopherson
2021-10-19  1:46             ` Xiaoyao Li
2021-08-27  7:02 ` [PATCH v2 7/7] KVM: VMX: Only context switch some PT MSRs when they exist Xiaoyao Li
2021-10-18 13:08   ` Paolo Bonzini
2021-10-18 14:04     ` Xiaoyao Li
2021-10-18 15:20       ` Paolo Bonzini [this message]
2021-10-19 16:52 ` [PATCH v2 0/7] KVM: VMX: PT (processor trace) optimization cleanup and fixes Paolo Bonzini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=96d0ff43-9b25-5f07-3fe8-7bd245ce06e4@redhat.com \
    --to=pbonzini@redhat.com \
    --cc=jmattson@google.com \
    --cc=joro@8bytes.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=seanjc@google.com \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.com \
    --cc=xiaoyao.li@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.