From: Yang Weijiang <weijiang.yang@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Yang Weijiang <weijiang.yang@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
sean.j.christopherson@intel.com, jmattson@google.com,
yu.c.zhang@linux.intel.com
Subject: Re: [PATCH v11 7/9] KVM: X86: Add userspace access interface for CET MSRs
Date: Tue, 28 Apr 2020 21:41:07 +0800 [thread overview]
Message-ID: <20200428134107.GA23937@local-michael-cet-test> (raw)
In-Reply-To: <f6f8cedf-26ce-70b4-2906-02806698d81b@redhat.com>
On Mon, Apr 27, 2020 at 04:04:28PM +0200, Paolo Bonzini wrote:
> On 26/04/20 17:23, Yang Weijiang wrote:
> > What's the purpose of the selftest? Is it just for Shadow Stack SSP
> > state transitions in various cases? e.g., L0 SSP<--->L3 SSP,
> > L0 SSP1<--->L0 SSP2?
>
> No, it checks that the whole state can be extracted and restored from a
> running VM. For example, it would have caught immediately that the
> current SSP could not be saved and restored.
>
> > We now have the KVM unit-test for CET functionalities,
> > i.e., Shadow Stack and Indirect Branch Tracking for user-mode, I can put the
> > state test app into the todo list as current patchset is mainly for user-mode
> > protection, the supervisor-mode CET protection is the next step.
>
> What are the limitations? Or are you referring to the unit test?
>
I'm referring to the unit test, I enabled basic CET function test to verify
if SHSTK/IBT is supported with current platform and KVM, but didn't cover
what you mentioned above. OK, I put the state
self-test to my todo list. Thank you for the reminder.
> Paolo
next prev parent reply other threads:[~2020-04-28 13:39 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 8:18 [PATCH v11 0/9] Introduce support for guest CET feature Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 1/9] KVM: VMX: Introduce CET VMX fields and flags Yang Weijiang
2020-04-23 16:07 ` Sean Christopherson
2020-04-24 13:39 ` Yang Weijiang
2020-04-23 16:39 ` Sean Christopherson
2020-04-24 13:44 ` Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 2/9] KVM: VMX: Set guest CET MSRs per KVM and host configuration Yang Weijiang
2020-04-23 16:27 ` Sean Christopherson
2020-04-24 14:07 ` Yang Weijiang
2020-04-24 14:55 ` Sean Christopherson
2020-04-25 9:14 ` Yang Weijiang
2020-04-25 13:26 ` Paolo Bonzini
2020-04-26 15:26 ` Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 3/9] KVM: VMX: Set host/guest CET states for vmexit/vmentry Yang Weijiang
2020-04-01 2:23 ` kbuild test robot
2020-04-01 2:23 ` kbuild test robot
2020-04-23 17:17 ` Sean Christopherson
2020-04-24 14:35 ` Yang Weijiang
2020-04-24 14:49 ` Sean Christopherson
2020-04-25 9:20 ` Yang Weijiang
2020-04-27 17:04 ` Sean Christopherson
2020-04-27 17:56 ` Sean Christopherson
2020-03-26 8:18 ` [PATCH v11 4/9] KVM: VMX: Check CET dependencies on CR settings Yang Weijiang
2020-04-23 17:20 ` Sean Christopherson
2020-04-24 14:36 ` Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 5/9] KVM: X86: Refresh CPUID once guest XSS MSR changes Yang Weijiang
2020-04-01 3:50 ` kbuild test robot
2020-04-01 3:50 ` kbuild test robot
2020-04-23 17:34 ` Sean Christopherson
2020-04-24 14:47 ` Yang Weijiang
2020-04-25 13:19 ` Paolo Bonzini
2020-04-26 15:01 ` Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 6/9] KVM: X86: Load guest fpu state when access MSRs managed by XSAVES Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 7/9] KVM: X86: Add userspace access interface for CET MSRs Yang Weijiang
2020-03-28 7:40 ` kbuild test robot
2020-03-28 7:40 ` kbuild test robot
2020-04-01 4:54 ` kbuild test robot
2020-04-01 4:54 ` kbuild test robot
2020-04-23 18:14 ` Sean Christopherson
2020-04-24 15:02 ` Yang Weijiang
2020-04-24 15:10 ` Sean Christopherson
2020-04-25 9:28 ` Yang Weijiang
2020-04-25 15:31 ` Paolo Bonzini
2020-04-26 15:23 ` Yang Weijiang
2020-04-27 14:04 ` Paolo Bonzini
2020-04-28 13:41 ` Yang Weijiang [this message]
2020-03-26 8:18 ` [PATCH v11 8/9] KVM: VMX: Enable CET support for nested VM Yang Weijiang
2020-04-01 6:11 ` kbuild test robot
2020-04-01 6:11 ` kbuild test robot
2020-04-23 18:29 ` Sean Christopherson
2020-04-24 15:24 ` Yang Weijiang
2020-03-26 8:18 ` [PATCH v11 9/9] KVM: X86: Set CET feature bits for CPUID enumeration Yang Weijiang
2020-03-27 4:41 ` kbuild test robot
2020-03-27 4:41 ` kbuild test robot
2020-04-23 16:56 ` Sean Christopherson
2020-04-24 14:17 ` Yang Weijiang
2020-04-23 16:58 ` Sean Christopherson
2020-04-24 14:23 ` Yang Weijiang
2020-03-26 8:18 ` [kvm-unit-tests PATCH] x86: Add tests for user-mode CET Yang Weijiang
2020-04-23 15:51 ` [PATCH v11 0/9] Introduce support for guest CET feature Sean Christopherson
2020-04-24 13:31 ` Yang Weijiang
2020-04-23 16:03 ` Sean Christopherson
2020-04-24 13:34 ` Yang Weijiang
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