On Fri, May 05, 2017 at 11:17:18AM -0700, Ricardo Neri wrote: > User-Mode Instruction Prevention is a security feature present in new > Intel processors that, when set, prevents the execution of a subset of > instructions if such instructions are executed in user mode (CPL > 0). > Attempting to execute such instructions causes a general protection > exception. > > The subset of instructions comprises: > > * SGDT - Store Global Descriptor Table > * SIDT - Store Interrupt Descriptor Table > * SLDT - Store Local Descriptor Table > * SMSW - Store Machine Status Word > * STR - Store Task Register > > This feature is also added to the list of disabled-features to allow > a cleaner handling of build-time configuration. > > Cc: Andy Lutomirski <l...@kernel.org> > Cc: Andrew Morton <a...@linux-foundation.org> > Cc: H. Peter Anvin <h...@zytor.com> > Cc: Borislav Petkov <b...@suse.de> > Cc: Brian Gerst <brge...@gmail.com> > Cc: Chen Yucong <sla...@gmail.com> > Cc: Chris Metcalf <cmetc...@mellanox.com> > Cc: Dave Hansen <dave.han...@linux.intel.com> > Cc: Fenghua Yu <fenghua...@intel.com> > Cc: Huang Rui <ray.hu...@amd.com> > Cc: Jiri Slaby <jsl...@suse.cz> > Cc: Jonathan Corbet <cor...@lwn.net> > Cc: Michael S. Tsirkin <m...@redhat.com> > Cc: Paul Gortmaker <paul.gortma...@windriver.com> > Cc: Peter Zijlstra <pet...@infradead.org> > Cc: Ravi V. Shankar <ravi.v.shan...@intel.com> > Cc: Shuah Khan <sh...@kernel.org> > Cc: Vlastimil Babka <vba...@suse.cz> > Cc: Tony Luck <tony.l...@intel.com> > Cc: Paolo Bonzini <pbonz...@redhat.com> > Cc: Liang Z. Li <liang.z...@intel.com> > Cc: Alexandre Julliard <julli...@winehq.org> > Cc: Stas Sergeev <s...@list.ru> > Cc: x...@kernel.org > Cc: linux-msdos@vger.kernel.org > > Signed-off-by: Ricardo Neri <ricardo.neri-calde...@linux.intel.com> > --- > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/include/asm/disabled-features.h | 8 +++++++- > arch/x86/include/uapi/asm/processor-flags.h | 2 ++ > 3 files changed, 10 insertions(+), 1 deletion(-)
Reviewed-by: Borislav Petkov <b...@suse.de> -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) -- -- To unsubscribe from this list: send the line "unsubscribe linux-msdos" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html