Andy Lutomirski <luto@xxxxxxxxxx> writes: > On Fri, Mar 2, 2018 at 10:55 AM, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> wrote: >> vmx_save_host_state() is only called from kvm_arch_vcpu_ioctl_run() so >> the context is pretty well defined >> > > True. > >> and MSR_FS_BASE should always be >> equal to current->thread.fsbase. > > Not true. current->thread.fsbase is almost entirely undefined in this > context. What you *could* do is export save_fsgs() and call it first. > When FSGSBASE support lands (which will happen eventually!), the code > in your patch will be completely wrong. > > Admittedly, your patch isn't 100% bogus, but the reason is subtle and > you need lots of comments there *and* in save_fsgs(). Thank you Andy, I'll take a look. -- Vitaly
