Linux 5.2 is supposedly introducing a flag that does exactly what you want. https://www.phoronix.com/scan.php?page=news_item&px=Spectre-Meltdown-Easy-Switch-52

Linux 5.2 is supposedly introducing a flag that does exactly what you want. https://www.phoronix.com/scan.php?page=news_item&px=Spectre-Meltdown-Easy-Switch-52 https://www.phoronix.com/scan.php?page=news_item&px=Spectre-...