linux-kernel - [PATCH 53/61] KVM: VMX: Directly use VMX capabilities helper to detect RDTSCP support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200201185218.24473-54-sean.j.christopherson@intel.com>
Date:   Sat,  1 Feb 2020 10:52:10 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.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 53/61] KVM: VMX: Directly use VMX capabilities helper to detect RDTSCP support

Use cpu_has_vmx_rdtscp() directly when computing secondary exec controls
and drop the now defunct vmx_rdtscp_supported().

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/kvm/vmx/vmx.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c3577f11f538..98d54cfa0cbe 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1651,11 +1651,6 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu)
 	vmx_clear_hlt(vcpu);
 }
 
-static bool vmx_rdtscp_supported(void)
-{
-	return cpu_has_vmx_rdtscp();
-}
-
 /*
  * Swap MSR entry in host/guest MSR entry array.
  */
@@ -4051,7 +4046,7 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
 		}
 	}
 
-	if (vmx_rdtscp_supported()) {
+	if (cpu_has_vmx_rdtscp()) {
 		bool rdtscp_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP);
 		if (!rdtscp_enabled)
 			exec_control &= ~SECONDARY_EXEC_RDTSCP;
-- 
2.24.1