core: map the zero page to the full hypervisor memory region

[jailhouse.git] / README.md

diff --git a/README.md b/README.md
index b34c3d563eca1645d2abffe6979da6b4b5098c1a..9298c4f6eda53938bb48c6b920e7e06c7fb77e6f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -185,7 +185,7 @@ nested SVM support. Start the virtual machine as follows:
         -device ide-hd,drive=disk -serial stdio -serial vc \
         -device intel-hda,addr=1b.0 -device hda-duplex
 
-Inside the VM, make sure that jailhouse-*.bin, generated by the build process,
+Inside the VM, make sure that `jailhouse-*.bin`, generated by the build process,
 are available for firmware loading (typically /lib/firmware), see above for
 installation steps.
 
@@ -195,8 +195,12 @@ need to add
 
     memmap=66M$0x3b000000
 
-as parameter to the command line of the virtual machine's kernel. Reboot the
-guest and load jailhouse.ko. Then enable Jailhouse like this:
+as parameter to the command line of the virtual machine's kernel. The Jailhouse
+QEMU cell config will block use of the serial port by the guest OS, so make
+sure that the guest kernel command line does NOT have its console set to log
+to the serial port (ie remove any 'console=ttyS0' arguments from the grub
+config). Reboot the guest and load jailhouse.ko. Then enable Jailhouse like
+this:
 
     jailhouse enable /path/to/qemu-vm.cell