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From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.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 v2 09/15] KVM: VMX: Check guest support for RDTSCP before processing MSR_TSC_AUX
Date: Wed, 23 Sep 2020 11:04:03 -0700	[thread overview]
Message-ID: <20200923180409.32255-10-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20200923180409.32255-1-sean.j.christopherson@intel.com>

Check for RDTSCP support prior to checking if MSR_TSC_AUX is in the uret
MSRs array so that the array lookup and manipulation are back-to-back.
This paves the way toward adding a helper to wrap the lookup and
manipulation.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ca41ee8fac5d..ed9ce25d3807 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1722,9 +1722,11 @@ static void setup_msrs(struct vcpu_vmx *vmx)
 	index = __vmx_find_uret_msr(vmx, MSR_EFER);
 	if (index >= 0 && update_transition_efer(vmx, index))
 		move_msr_up(vmx, index, nr_active_uret_msrs++);
-	index = __vmx_find_uret_msr(vmx, MSR_TSC_AUX);
-	if (index >= 0 && guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP))
-		move_msr_up(vmx, index, nr_active_uret_msrs++);
+	if (guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP)) {
+		index = __vmx_find_uret_msr(vmx, MSR_TSC_AUX);
+		if (index >= 0)
+			move_msr_up(vmx, index, nr_active_uret_msrs++);
+	}
 	index = __vmx_find_uret_msr(vmx, MSR_IA32_TSX_CTRL);
 	if (index >= 0)
 		move_msr_up(vmx, index, nr_active_uret_msrs++);
-- 
2.28.0


  parent reply	other threads:[~2020-09-23 18:05 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-23 18:03 [PATCH v2 00/15] KVM: x86: VMX: Fix MSR namespacing Sean Christopherson
2020-09-23 18:03 ` [PATCH v2 01/15] KVM: x86: Rename "shared_msrs" to "user_return_msrs" Sean Christopherson
2020-09-23 18:03 ` [PATCH v2 02/15] KVM: VMX: Prepend "MAX_" to MSR array size defines Sean Christopherson
2020-09-23 18:03 ` [PATCH v2 03/15] KVM: VMX: Rename "vmx_find_msr_index" to "vmx_find_loadstore_msr_slot" Sean Christopherson
2020-09-25 22:04   ` Paolo Bonzini
2020-09-23 18:03 ` [PATCH v2 04/15] KVM: VMX: Rename the "shared_msr_entry" struct to "vmx_uret_msr" Sean Christopherson
2020-09-23 18:03 ` [PATCH v2 05/15] KVM: VMX: Rename vcpu_vmx's "nmsrs" to "nr_uret_msrs" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 06/15] KVM: VMX: Rename vcpu_vmx's "save_nmsrs" to "nr_active_uret_msrs" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 07/15] KVM: VMX: Rename vcpu_vmx's "guest_msrs_ready" to "guest_uret_msrs_loaded" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 08/15] KVM: VMX: Rename "__find_msr_index" to "__vmx_find_uret_msr" Sean Christopherson
2020-09-23 18:04 ` Sean Christopherson [this message]
2020-09-23 18:04 ` [PATCH v2 10/15] KVM: VMX: Move uret MSR lookup into update_transition_efer() Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 11/15] KVM: VMX: Add vmx_setup_uret_msr() to handle lookup and swap Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 12/15] KVM: VMX: Rename "find_msr_entry" to "vmx_find_uret_msr" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 13/15] KVM: VMX: Rename "vmx_set_guest_msr" to "vmx_set_guest_uret_msr" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 14/15] KVM: VMX: Rename "vmx_msr_index" to "vmx_uret_msrs_list" Sean Christopherson
2020-09-23 18:04 ` [PATCH v2 15/15] KVM: VMX: Rename vmx_uret_msr's "index" to "slot" Sean Christopherson

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