AMD has released new microcode for Zen processors from the 19h and 17h families. The latter is particularly notable because the term refers to Ryzen chips with the Zen, Zen+, and Zen 2 architectures (desktop Ryzen 1000/2000/3000). As always, team red hasn’t shared a changelog, so it’s unclear what changes will be made.
While the code 19h (Zen 3) is the same size as the previous version, Phoronix saw a significant increase in the case of 17h. At 9,700 bytes in size, the new microcode is almost half the size of its predecessor (6,476 bytes). The website suspects all sorts of minor fixes have been applied since the previous update was dated December 2019. Closing security vulnerabilities is also an option.
Phoronix expects the microcode to be available soon at linux-firmware.git and included in various Linux distributions.
Source: Phoronix
Source: Hardware Info
