Only enable tsi_hijack when a vsock device is attached

Signed-off-by: Matej Hrica <[email protected]>

Author: mtjhrc

src/vmm/src/builder.rs

@@ -584,6 +584,7 @@ pub fn build_microvm(
     attach_block_devices(&mut vmm, &vm_resources.block, event_manager, intc.clone())?;
     if let Some(vsock) = vm_resources.vsock.get() {
         attach_unixsock_vsock_device(&mut vmm, vsock, event_manager, intc)?;
+        vmm.kernel_cmdline.insert_str("tsi_hijack")?;
     }
 
     if let Some(s) = &vm_resources.boot_config.kernel_cmdline_epilog {

src/vmm/src/vmm_config/boot_source.rs

@@ -18,14 +18,14 @@ use std::fmt::{Display, Formatter, Result};
 
 #[cfg(all(target_os = "linux", not(feature = "tee")))]
 pub const DEFAULT_KERNEL_CMDLINE: &str = "reboot=k panic=-1 panic_print=0 nomodules console=hvc0 \
-                                          rootfstype=virtiofs rw quiet no-kvmapf tsi_hijack";
+                                          rootfstype=virtiofs rw quiet no-kvmapf";
 
 #[cfg(feature = "amd-sev")]
 pub const DEFAULT_KERNEL_CMDLINE: &str = "reboot=k panic=-1 panic_print=0 nomodules console=hvc0 \
-                                          root=/dev/vda rw quiet no-kvmapf tsi_hijack";
+                                          root=/dev/vda rw quiet no-kvmapf";
 #[cfg(target_os = "macos")]
 pub const DEFAULT_KERNEL_CMDLINE: &str = "reboot=k panic=-1 panic_print=0 nomodules console=hvc0 \
-                                          rootfstype=virtiofs rw quiet no-kvmapf tsi_hijack";
+                                          rootfstype=virtiofs rw quiet no-kvmapf";
 
 //pub const DEFAULT_KERNEL_CMDLINE: &str = "reboot=k panic=1 pci=off nomodules earlyprintk=ttyS0 \
 //                                          console=ttyS0";