On Wed, Oct 20, 2021, Li Yu wrote: > Warn for guest huge pages split if iTLB multi-hit bug is present > and CPU mitigations is enabled. > > Warn for possible CPU lockup if iTLB multi-hit bug is present but > CPU mitigations is disabled. > > Signed-off-by: Li Yu <liyu.yukiteru@xxxxxxxxxxxxx> > --- Gah, my last reply in the previous version was offlist. I would like an answer to the below question before we complicate KVM just to log a message. On Wed, Oct 20, 2021 at 12:51 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote: > > On Wed, Oct 20, 2021, Li Yu wrote: > > On 2021/10/20 00:23, Sean Christopherson wrote: > > I think it is necessary to log something when `nx_huge_pages` is `auto` or > > `off`, and the bug is present. > > Why is it necessary? Specifically, what action can be taken based on KVM logging > that can't reasonably be taken based on all the other information provided by the > kernel? We should teach userspace to go look at the vulnerabilites info, not to > scrape the kernel log.
