On Fri, 2025-01-31 at 17:13 -0800, Sean Christopherson wrote: > Query kvm_xen_enabled when detecting writes to the Xen hypercall page MSR > so that the check is optimized away in the likely scenario that Xen isn't > enabled for the VM. > > Deliberately open code the check instead of using kvm_xen_msr_enabled() in > order to avoid a double load of xen_hvm_config.msr (which is admittedly > rather pointless given the widespread lack of READ_ONCE() usage on the > plethora of vCPU-scoped accesses to kvm->arch.xen state). > > No functional change intended. > > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> Reviewed-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
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