Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-17 Thread Yang Weijiang
On Thu, Oct 17, 2019 at 01:04:11PM -0700, Sean Christopherson wrote: > On Wed, Oct 09, 2019 at 02:15:09PM +0800, Yang Weijiang wrote: > > On Wed, Oct 02, 2019 at 11:18:32AM -0700, Jim Mattson wrote: > > > > + kvm_xss = kvm_supported_xss(); > > > > + cet_en = guest_cpuid_has(vcpu, X86_FE

Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-17 Thread Sean Christopherson
On Wed, Oct 09, 2019 at 02:15:09PM +0800, Yang Weijiang wrote: > On Wed, Oct 02, 2019 at 11:18:32AM -0700, Jim Mattson wrote: > > > + kvm_xss = kvm_supported_xss(); > > > + cet_en = guest_cpuid_has(vcpu, X86_FEATURE_SHSTK) || > > > +guest_cpuid_has(vcpu, X86_FEATURE_IBT)

Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-10 Thread Yang Weijiang
On Thu, Oct 10, 2019 at 12:04:40PM -0700, Jim Mattson wrote: > On Tue, Oct 8, 2019 at 11:13 PM Yang Weijiang wrote: > > > > On Wed, Oct 02, 2019 at 11:18:32AM -0700, Jim Mattson wrote: > > > On Thu, Sep 26, 2019 at 7:17 PM Yang Weijiang > > > wrote: > > > > > > > > CET MSRs pass through Guest di

Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-10 Thread Jim Mattson
On Tue, Oct 8, 2019 at 11:13 PM Yang Weijiang wrote: > > On Wed, Oct 02, 2019 at 11:18:32AM -0700, Jim Mattson wrote: > > On Thu, Sep 26, 2019 at 7:17 PM Yang Weijiang > > wrote: > > > > > > CET MSRs pass through Guest directly to enhance performance. > > > CET runtime control settings are store

Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-08 Thread Yang Weijiang
On Wed, Oct 02, 2019 at 11:18:32AM -0700, Jim Mattson wrote: > On Thu, Sep 26, 2019 at 7:17 PM Yang Weijiang wrote: > > > > CET MSRs pass through Guest directly to enhance performance. > > CET runtime control settings are stored in MSR_IA32_{U,S}_CET, > > Shadow Stack Pointer(SSP) are stored in MS

Re: [PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-10-02 Thread Jim Mattson
On Thu, Sep 26, 2019 at 7:17 PM Yang Weijiang wrote: > > CET MSRs pass through Guest directly to enhance performance. > CET runtime control settings are stored in MSR_IA32_{U,S}_CET, > Shadow Stack Pointer(SSP) are stored in MSR_IA32_PL{0,1,2,3}_SSP, > SSP table base address is stored in MSR_IA32_

[PATCH v7 3/7] KVM: VMX: Pass through CET related MSRs to Guest

2019-09-26 Thread Yang Weijiang
CET MSRs pass through Guest directly to enhance performance. CET runtime control settings are stored in MSR_IA32_{U,S}_CET, Shadow Stack Pointer(SSP) are stored in MSR_IA32_PL{0,1,2,3}_SSP, SSP table base address is stored in MSR_IA32_INT_SSP_TAB, these MSRs are defined in kernel and re-used here.