lkml.org 
[lkml]   [2020]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 09/15] KVM: VMX: Check guest support for RDTSCP before processing MSR_TSC_AUX
Date
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 a0f4049d956f..954b9aa950f2 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1751,9 +1751,11 @@ 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++);
--
2.26.0
\
 
 \ /
  Last update: 2020-06-23 00:45    [W:0.124 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site