linux-kernel - [PATCH 2/5] KVM: VMX: Use cached vmx->pt_desc.addr

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Date:   Tue, 24 Aug 2021 19:07:40 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Xiaoyao Li <xiaoyao.li@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] KVM: VMX: Use cached vmx->pt_desc.addr_range

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@...el.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