Instead of checking hvm_tsc_scaling_supported inside the hook function,
install the hook only when setting state such that said predicate
becomes true.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1283,7 +1283,7 @@ static void vmx_handle_cd(struct vcpu *v
static void vmx_setup_tsc_scaling(struct vcpu *v)
{
- if ( !hvm_tsc_scaling_supported || v->domain->arch.vtsc )
+ if ( v->domain->arch.vtsc )
return;
vmx_vmcs_enter(v);
@@ -2346,7 +2346,6 @@ static struct hvm_function_table __initd
.altp2m_vcpu_emulate_vmfunc = vmx_vcpu_emulate_vmfunc,
.tsc_scaling = {
.max_ratio = VMX_TSC_MULTIPLIER_MAX,
- .setup = vmx_setup_tsc_scaling,
},
};
@@ -2486,7 +2485,10 @@ const struct hvm_function_table * __init
}
if ( cpu_has_vmx_tsc_scaling )
+ {
vmx_function_table.tsc_scaling.ratio_frac_bits = 48;
+ vmx_function_table.tsc_scaling.setup = vmx_setup_tsc_scaling;
+ }
if ( cpu_has_mpx && cpu_has_vmx_mpx )
{
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