diff --git a/docs/COLO-FT.txt b/docs/COLO-FT.txt
index 8874690e83..8d6d53a5a2 100644
--- a/docs/COLO-FT.txt
+++ b/docs/COLO-FT.txt
@@ -158,7 +158,7 @@ instance.
 
 # imagefolder="/mnt/vms/colo-test-primary"
 
-# qemu-system-x86_64 -enable-kvm -cpu qemu64,+kvmclock -m 512 -smp 1 -qmp stdio \
+# qemu-system-x86_64 -enable-kvm -cpu qemu64,kvmclock=on -m 512 -smp 1 -qmp stdio \
    -device piix3-usb-uhci -device usb-tablet -name primary \
    -netdev tap,id=hn0,vhost=off,helper=/usr/lib/qemu/qemu-bridge-helper \
    -device rtl8139,id=e0,netdev=hn0 \
@@ -189,7 +189,7 @@ any IP's here, except for the $primary_ip variable.
 
 # qemu-img create -f qcow2 $imagefolder/secondary-hidden.qcow2 10G
 
-# qemu-system-x86_64 -enable-kvm -cpu qemu64,+kvmclock -m 512 -smp 1 -qmp stdio \
+# qemu-system-x86_64 -enable-kvm -cpu qemu64,kvmclock=on -m 512 -smp 1 -qmp stdio \
    -device piix3-usb-uhci -device usb-tablet -name secondary \
    -netdev tap,id=hn0,vhost=off,helper=/usr/lib/qemu/qemu-bridge-helper \
    -device rtl8139,id=e0,netdev=hn0 \
diff --git a/docs/interop/firmware.json b/docs/interop/firmware.json
index 989f10b626..9d94ccafa9 100644
--- a/docs/interop/firmware.json
+++ b/docs/interop/firmware.json
@@ -129,7 +129,7 @@
 #                "-machine smm=on". (On the "pc-q35-*" machine types of
 #                the @i386 emulation target, @requires-smm presents
 #                further CPU requirements; one combination known to work
-#                is "-cpu coreduo,-nx".) If the firmware is marked as
+#                is "-cpu coreduo,nx=off".) If the firmware is marked as
 #                both @secure-boot and @requires-smm, then write
 #                accesses to the pflash chip (NVRAM) that holds the UEFI
 #                variable store must be restricted to code that executes
diff --git a/docs/system/cpu-models-x86.rst.inc b/docs/system/cpu-models-x86.rst.inc
index 9a2327828e..867c8216b5 100644
--- a/docs/system/cpu-models-x86.rst.inc
+++ b/docs/system/cpu-models-x86.rst.inc
@@ -364,7 +364,7 @@ Host passthrough with feature customization:
 
 .. parsed-literal::
 
-  |qemu_system| -cpu host,-vmx,...
+  |qemu_system| -cpu host,vmx=off,...
 
 Named CPU models:
 
@@ -376,7 +376,7 @@ Named CPU models with feature customization:
 
 .. parsed-literal::
 
-  |qemu_system| -cpu Westmere,+pcid,...
+  |qemu_system| -cpu Westmere,pcid=on,...
 
 Libvirt guest XML
 ^^^^^^^^^^^^^^^^^