On Mon, May 08, 2023, Mathias Krause wrote: > This is a partial backport of the CR0.WP KVM series[1] to Linux v5.4. It > limits itself to avoid TDP MMU unloading as making CR0.WP a guest owned > bit turned out to be too much of an effort and the partial backport > already being quite effective. > > I used 'ssdd 10 50000' from rt-tests[2] as a micro-benchmark, running on > a grsecurity L1 VM. Below table shows the results (runtime in seconds, > lower is better): > > TDP shadow > Linux v5.4.240 8.87s 56.8s > + patches 5.84s 55.4s > > > This kernel version had no module parameter to control the TDP MMU > setting, it's always enabled when EPT / NPT is. Therefore its meaning is > likely what became "legacy" in newer kernels. > > Please consider applying. NAK, same problem as 5.10 and 5.15. Sorry :-(
