On Tue, 2019-02-26 at 15:57 +0800, Yang Weijiang wrote: > On Tue, Feb 26, 2019 at 11:48:59AM -0800, Jim Mattson wrote: > > On Mon, Feb 25, 2019 at 10:32 PM Yang Weijiang <weijiang.yang@xxxxxxxxx> > > wrote: > > > > > > Guest queries CET SHSTK and IBT support by CPUID.(EAX=0x7,ECX=0), > > > in return, ECX[bit 7] corresponds to SHSTK feature, and EDX[bit 20] > > > corresponds to IBT feature. > > > CR4.CET[bit 23] is CET master enable bit, it controls CET feature > > > availability in guest OS. > > > > > > Note: Although SHSTK or IBT can be enabled independently, > > > either of the features is controlled by CR4.CET. > > > > > > Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx> > > > Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx> > > > > Am I missing something? X86_CR4_CET and X86_FEATURE_SHSTK and > > X86_FEATURE_IBT don't appear to be defined in Linus' tree. > > The patch-set has dependency on this CET Kernel patch-set: > https://lkml.org/lkml/2018/11/20/203 > I reused some definitions from the kernel patches. Right, the definitions should be defined by the kernel patches. However, I have checked the latest kernel patches and found it didn't define the related CPUID feature bits.
