LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Xiaoyao Li <xiaoyao.li@intel.com>,
	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: [PATCH 2/5] KVM: VMX: Use cached vmx->pt_desc.addr_range
Date: Tue, 24 Aug 2021 19:07:40 +0800	[thread overview]
Message-ID: <20210824110743.531127-3-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20210824110743.531127-1-xiaoyao.li@intel.com>

The number of guest's valid PT ADDR MSRs is cached in
vmx->pt_desc.addr_range. Use it instead of calculating it again.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index e0a9460e4dab..7ed96c460661 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2202,8 +2202,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		if (!pt_can_write_msr(vmx))
 			return 1;
 		index = msr_info->index - MSR_IA32_RTIT_ADDR0_A;
-		if (index >= 2 * intel_pt_validate_cap(vmx->pt_desc.caps,
-						       PT_CAP_num_address_ranges))
+		if (index >= 2 * vmx->pt_desc.addr_range)
 			return 1;
 		if (is_noncanonical_address(data, vcpu))
 			return 1;
-- 
2.27.0


  parent reply	other threads:[~2021-08-24 11:08 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 11:07 [PATCH 0/5] KVM: VMX: PT (processor trace) optimizations and fixes Xiaoyao Li
2021-08-24 11:07 ` [PATCH 1/5] KVM: VMX: Restore host's MSR_IA32_RTIT_CTL when it's not zero Xiaoyao Li
2021-08-24 17:54   ` Sean Christopherson
2021-08-24 11:07 ` Xiaoyao Li [this message]
2021-08-24 15:24   ` [PATCH 2/5] KVM: VMX: Use cached vmx->pt_desc.addr_range Sean Christopherson
2021-08-24 15:42     ` Xiaoyao Li
2021-08-24 11:07 ` [PATCH 3/5] KVM: VMX: RTIT_CTL_BRANCH_EN has no dependency on other CPUID bit Xiaoyao Li
2021-08-25  3:30   ` Like Xu
2021-08-25  4:19     ` Xiaoyao Li
2021-08-25  6:08       ` Like Xu
2021-08-25  6:33         ` Xiaoyao Li
2021-08-25  8:14           ` Like Xu
2021-08-25  8:58             ` Xiaoyao Li
2021-08-25 11:53           ` Alexander Shishkin
2021-08-24 11:07 ` [PATCH 4/5] KVM: VMX: Disallow PT MSRs accessing if PT is not exposed to guest Xiaoyao Li
2021-08-24 14:20   ` Sean Christopherson
2021-08-24 15:35     ` Xiaoyao Li
2021-08-24 16:48       ` Sean Christopherson
2021-08-24 11:07 ` [PATCH 5/5] KVM: VMX: Check Intel PT related CPUID leaves Xiaoyao Li

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=20210824110743.531127-3-xiaoyao.li@intel.com \
    --to=xiaoyao.li@intel.com \
    --cc=jmattson@google.com \
    --cc=joro@8bytes.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pbonzini@redhat.com \
    --cc=seanjc@google.com \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.com \
    --subject='Re: [PATCH 2/5] KVM: VMX: Use cached vmx->pt_desc.addr_range' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).