From: Yang Weijiang <weijiang.yang@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Yang Weijiang <weijiang.yang@intel.com>,
seanjc@google.com, jmattson@google.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, yu.c.zhang@linux.intel.com
Subject: Re: [PATCH v15 14/14] KVM: x86: Save/Restore GUEST_SSP to/from SMRAM
Date: Wed, 3 Feb 2021 20:59:57 +0800 [thread overview]
Message-ID: <20210203125957.GB6080@local-michael-cet-test> (raw)
In-Reply-To: <55e43685-f4a7-b068-8d4c-931b8789f031@redhat.com>
On Wed, Feb 03, 2021 at 01:07:53PM +0100, Paolo Bonzini wrote:
> On 03/02/21 12:34, Yang Weijiang wrote:
> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > index 22eb6b8626a8..f63b713cd71f 100644
> > --- a/arch/x86/kvm/x86.c
> > +++ b/arch/x86/kvm/x86.c
> > @@ -8592,6 +8592,16 @@ static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf)
> > for (i = 0; i < 6; i++)
> > enter_smm_save_seg_64(vcpu, buf, i);
> > +
> > + if (kvm_cet_supported()) {
> > + struct msr_data msr;
> > +
> > + msr.index = MSR_KVM_GUEST_SSP;
> > + msr.host_initiated = true;
> > + /* GUEST_SSP is stored in VMCS at vm-exit. */
> > + kvm_x86_ops.get_msr(vcpu, &msr);
> > + put_smstate(u64, buf, 0x7ec8, msr.data);
> > + }
> > }
> > #endif
> >
>
> 0x7ec8 is used for I/O instruction restart and auto-halt restart. 0x7f08 is
> a free spot. We should really document the KVM state save area format.
Thanks for catching the documentation error!
>
> Paolo
next prev parent reply other threads:[~2021-02-03 12:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 11:34 [PATCH v15 00/14] Introduce support for guest CET feature Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 01/14] KVM: x86: Report XSS as an MSR to be saved if there are supported features Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 02/14] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 03/14] KVM: x86: Load guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2021-02-03 17:34 ` kernel test robot
2021-02-03 11:34 ` [PATCH v15 04/14] KVM: x86: Add #CP support in guest exception dispatch Yang Weijiang
2021-02-03 21:46 ` Sean Christopherson
2021-02-04 7:22 ` Yang Weijiang
2021-02-04 8:28 ` Paolo Bonzini
2021-02-04 8:24 ` Paolo Bonzini
2021-02-04 16:42 ` Sean Christopherson
2021-02-04 17:29 ` Paolo Bonzini
2021-02-03 11:34 ` [PATCH v15 05/14] KVM: VMX: Introduce CET VMCS fields and flags Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 06/14] KVM: x86: Add fault checks for CR4.CET Yang Weijiang
2021-02-03 21:24 ` kernel test robot
2021-02-03 11:34 ` [PATCH v15 07/14] KVM: VMX: Emulate reads and writes to CET MSRs Yang Weijiang
2021-02-03 11:57 ` Paolo Bonzini
2021-02-03 12:50 ` Yang Weijiang
2021-02-04 1:17 ` kernel test robot
2022-05-18 15:55 ` John Allen
2022-05-18 16:16 ` Sean Christopherson
2022-05-19 8:49 ` Yang, Weijiang
2021-02-03 11:34 ` [PATCH v15 08/14] KVM: VMX: Add a synthetic MSR to allow userspace VMM to access GUEST_SSP Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 09/14] KVM: x86: Report CET MSRs as to-be-saved if CET is supported Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 10/14] KVM: x86: Enable CET virtualization for VMX and advertise CET to userspace Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 11/14] KVM: VMX: Pass through CET MSRs to the guest when supported Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 12/14] KVM: nVMX: Add helper to check the vmcs01 MSR bitmap for MSR pass-through Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 13/14] KVM: nVMX: Enable CET support for nested VMX Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 14/14] KVM: x86: Save/Restore GUEST_SSP to/from SMRAM Yang Weijiang
2021-02-03 12:07 ` Paolo Bonzini
2021-02-03 12:59 ` Yang Weijiang [this message]
2021-02-03 12:40 ` [PATCH v15 00/14] Introduce support for guest CET feature Paolo Bonzini
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