Mark the TSC frequency as known when using ACRN's PV CPUID information.
Per commit 81a71f51b89e ("x86/acrn: Set up timekeeping") and common sense,
the TSC freq is explicitly provided by the hypervisor.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kernel/cpu/acrn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c
index c1506cb87d8c..2da3de4d470e 100644
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -29,6 +29,7 @@ static void __init acrn_init_platform(void)
 	/* Install system interrupt handler for ACRN hypervisor callback */
 	sysvec_install(HYPERVISOR_CALLBACK_VECTOR, sysvec_acrn_hv_callback);
 
+	setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
 	tsc_register_calibration_routines(acrn_get_tsc_khz,
 					  acrn_get_tsc_khz);
 }
-- 
2.48.1.362.g079036d154-goog