diff --git a/src/cpu/qemu-x86/Kconfig b/src/cpu/qemu-x86/Kconfig
index f564d70066..6a34687d3d 100644
--- a/src/cpu/qemu-x86/Kconfig
+++ b/src/cpu/qemu-x86/Kconfig
@@ -6,7 +6,6 @@ config CPU_QEMU_X86
 	select HAVE_X86_64_SUPPORT
 	select UDELAY_TSC
 	select TSC_MONOTONIC_TIMER
-	select UNKNOWN_TSC_RATE
 	select NEED_SMALL_2MB_PAGE_TABLES	# QEMU doesn't support 1GB pages
 	select IDT_IN_EVERY_STAGE
 
diff --git a/src/mainboard/emulation/qemu-q35/Makefile.mk b/src/mainboard/emulation/qemu-q35/Makefile.mk
index c1619f5ede..1d3b39c475 100644
--- a/src/mainboard/emulation/qemu-q35/Makefile.mk
+++ b/src/mainboard/emulation/qemu-q35/Makefile.mk
@@ -18,9 +18,11 @@ ramstage-y += cpu.c
 
 all-y += ../qemu-i440fx/fw_cfg.c
 all-y += ../qemu-i440fx/bootmode.c
+all-y += timer.c
 
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 
 smm-y += ../qemu-i440fx/rom_media.c
 smm-y += memmap.c
 smm-y += smihandler.c
+smm-y += timer.c
diff --git a/src/mainboard/emulation/qemu-q35/timer.c b/src/mainboard/emulation/qemu-q35/timer.c
new file mode 100644
index 0000000000..74a693e953
--- /dev/null
+++ b/src/mainboard/emulation/qemu-q35/timer.c
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <cpu/x86/tsc.h>
+
+unsigned long tsc_freq_mhz(void)
+{
+	/* ACPI's Power Management Timer frequency is fixed at 3.579545 MHz. */
+	return 3579545 / 1000000;
+}