On Tue, 2015-08-25 at 13:12 -0700, Dave Hansen wrote: > From: Dave Hansen <[email protected]> > > We now have C structures defined for each of the XSAVE state > components that we support. This patch adds checks during our > verification pass to ensure that the CPU-provided data > enumerated in CPUID leaves matches our C structures. > > If not, we warn and dump all the XSAVE CPUID leaves. > > Note: this *actually* found an inconsistency with the MPX > 'bndcsr' state. The hardware pads it out differently from > our C structures. This patch caught it and warned. > > Signed-off-by: Dave Hansen <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: [email protected] > Cc: Borislav Petkov <[email protected]> > Cc: Fenghua Yu <[email protected]> > Cc: Tim Chen <[email protected]> > Cc: [email protected] > --- > > b/appendme | 6 +++ > b/arch/x86/include/asm/fpu/types.h | 1 > b/arch/x86/kernel/fpu/xstate.c | 62 > +++++++++++++++++++++++++++++++++++-- > 3 files changed, 67 insertions(+), 2 deletions(-) > > diff -puN /dev/null appendme > --- /dev/null 2015-07-13 14:24:11.435656502 -0700 > +++ b/appendme 2015-08-25 12:50:01.857661314 -0700 > @@ -0,0 +1,6 @@ > +Cc: Ingo Molnar <[email protected]> > +Cc: [email protected] > +Cc: Borislav Petkov <[email protected]> > +Cc: Fenghua Yu <[email protected]> > +Cc: Tim Chen <[email protected]> > +Cc: [email protected] > diff -puN > arch/x86/include/asm/fpu/types.h~x86-fpu-check-against-struct-declarations > arch/x86/include/asm/fpu/types.h > --- > a/arch/x86/include/asm/fpu/types.h~x86-fpu-check-against-struct-declarations > 2015-08-25 12:50:01.853661133 -0700 > +++ b/arch/x86/include/asm/fpu/types.h 2015-08-25 12:50:01.858661359 > -0700 > @@ -108,6 +108,7 @@ enum xfeature_nr { > XFEATURE_NR_OPMASK, > XFEATURE_NR_ZMM_Hi256, > XFEATURE_NR_Hi16_ZMM, > + XFEATURE_NR_PT_UNIMPLEMENTED_SO_FAR, >
Maybe move this to a separate patch with a bit more explanation of this XFEATURE? Tim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
