On Thu, Apr 01, 2021 at 04:54:50PM +0300, Maxim Levitsky wrote: > This parameter will be used by VMX and SVM code to force > interception of a set of exceptions, given by a bitmask > for guest debug and/or kvm debug. > > This option is not intended for production. > > This is based on an idea first shown here: > https://patchwork.kernel.org/project/kvm/patch/20160301192822.GD22677@xxxxxxx/ > > CC: Borislav Petkov <bp@xxxxxxx> > Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx> > --- > arch/x86/kvm/x86.c | 3 +++ > arch/x86/kvm/x86.h | 2 ++ > 2 files changed, 5 insertions(+) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 3627ce8fe5bb..1a51031d64d8 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -176,6 +176,9 @@ module_param(force_emulation_prefix, bool, S_IRUGO); > int __read_mostly pi_inject_timer = -1; > module_param(pi_inject_timer, bint, S_IRUGO | S_IWUSR); > > +uint force_intercept_exceptions_mask; > +module_param(force_intercept_exceptions_mask, uint, S_IRUGO | S_IWUSR); > +EXPORT_SYMBOL_GPL(force_intercept_exceptions_mask); That's nice. I could use some text explaning the usage though, i.e. that thing takes a bitfield of exception vectors, so that I don't have to look at the code each time. :-) Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
