Control-flow Enforcement Technology (CET) provides protection against return/jump-oriented programming (ROP) attacks. To make kvm Guest OS own the capability, this patch-set is required. It enables CET related CPUID report, xsaves/xrstors, vmx entry configuration etc. for Guest OS. PATCH 1 : Define CET VMCS fields and bits. PATCH 2/3 : Report CET feature support in CPUID. PATCH 4 : Fix xsaves size calculation issue. PATCH 5 : Pass through CET MSRs to Guest. PATCH 6 : Set Guest CET state auto loading bit. PATCH 7 : Enable CET xsaves bits support in XSS. Changelog: v2: - Re-ordered patch sequence, combined one patch. - Added more description for CET related VMCS fields. - Added Host CET capability check while enabling Guest CET loading bit. - Added Host CET capability check while reporting Guest CPUID(EAX=7, EXC=0). - Modified code in reporting Guest CPUID(EAX=D,ECX>=1), make it clearer. - Added Host and Guest XSS mask check while setting bits for Guest XSS. Yang Weijiang (7): KVM:VMX: Define CET VMCS fields and bits KVM:CPUID: Define CET CPUID bits and CR4.CET master enable bit. KVM:CPUID: Add CPUID support for CET xsaves component query. KVM:CPUID: Fix xsaves area size calculation for CPUID.(EAX=0xD,ECX=1). KVM:VMX: Pass through host CET related MSRs to Guest. KVM:VMX: Load Guest CET via VMCS when CET is enabled in Guest KVM:X86: Enable MSR_IA32_XSS bit 11 and 12 for CET xsaves/xrstors. arch/x86/include/asm/kvm_host.h | 3 +- arch/x86/include/asm/vmx.h | 8 ++++ arch/x86/kvm/cpuid.c | 67 ++++++++++++++++++++++++--------- arch/x86/kvm/vmx.c | 60 +++++++++++++++++++++++++++-- arch/x86/kvm/x86.c | 4 ++ arch/x86/kvm/x86.h | 4 ++ 6 files changed, 125 insertions(+), 21 deletions(-) -- 2.17.1
