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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 v14 07/13] KVM: VMX: Emulate reads and writes to CET MSRs
Date: Fri, 29 Jan 2021 16:07:19 +0800	[thread overview]
Message-ID: <20210129080719.GA28424@local-michael-cet-test.sh.intel.com> (raw)
In-Reply-To: <a73b590d-4cd3-f1b3-bea2-e674846595b3@redhat.com>

On Thu, Jan 28, 2021 at 06:45:08PM +0100, Paolo Bonzini wrote:
> On 06/11/20 02:16, Yang Weijiang wrote:
> > 
> > +static bool cet_is_ssp_msr_accessible(struct kvm_vcpu *vcpu,
> > +				      struct msr_data *msr)
> > +{
> > +	u64 mask;
> > +
> > +	if (!kvm_cet_supported())
> > +		return false;
> > +
> > +	if (msr->host_initiated)
> > +		return true;
> > +
> > +	if (!guest_cpuid_has(vcpu, X86_FEATURE_SHSTK))
> > +		return false;
> > +
> > +	if (msr->index == MSR_IA32_INT_SSP_TAB)
> > +		return false;
> 
> Shouldn't this return true?
>
Hi, Paolo,
Thanks for the feedback!
Yes, it should be true, will fix it in next release.
> Paolo
> 
> > +	mask = (msr->index == MSR_IA32_PL3_SSP) ? XFEATURE_MASK_CET_USER :
> > +						  XFEATURE_MASK_CET_KERNEL;
> > +	return !!(vcpu->arch.guest_supported_xss & mask);
> > +}

  reply	other threads:[~2021-01-29  7:56 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-06  1:16 [PATCH v14 00/13] Introduce support for guest CET feature Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 01/13] KVM: x86: Report XSS as an MSR to be saved if there are supported features Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 02/13] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 03/13] KVM: x86: Add #CP support in guest exception dispatch Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 04/13] KVM: VMX: Introduce CET VMCS fields and flags Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 05/13] KVM: x86: Add fault checks for CR4.CET Yang Weijiang
2020-11-09 10:44   ` kernel test robot
2020-11-06  1:16 ` [PATCH v14 06/13] KVM: x86: Load guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 07/13] KVM: VMX: Emulate reads and writes to CET MSRs Yang Weijiang
2021-01-28 17:45   ` Paolo Bonzini
2021-01-29  8:07     ` Yang Weijiang [this message]
2020-11-06  1:16 ` [PATCH v14 08/13] KVM: VMX: Add a synthetic MSR to allow userspace VMM to access GUEST_SSP Yang Weijiang
2021-01-28 17:41   ` Paolo Bonzini
2021-01-28 17:42   ` Paolo Bonzini
2020-11-06  1:16 ` [PATCH v14 09/13] KVM: x86: Report CET MSRs as to-be-saved if CET is supported Yang Weijiang
2021-01-28 17:46   ` Paolo Bonzini
2021-01-29  8:08     ` Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 10/13] KVM: x86: Enable CET virtualization for VMX and advertise CET to userspace Yang Weijiang
2020-11-09  7:23   ` kernel test robot
2021-01-28 17:53   ` Paolo Bonzini
     [not found]     ` <20210129112437.GA29715@local-michael-cet-test.sh.intel.com>
     [not found]       ` <68e288ee-6e09-36f1-a6c9-bed864eb7678@redhat.com>
     [not found]         ` <20210129121717.GA30243@local-michael-cet-test.sh.intel.com>
     [not found]           ` <1cf7e501-2c69-8b76-9332-42db1348ab08@redhat.com>
2021-01-30  6:32             ` Yang Weijiang
2021-02-01  4:56             ` Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 11/13] KVM: VMX: Pass through CET MSRs to the guest when supported Yang Weijiang
2021-01-28 17:54   ` Paolo Bonzini
2021-01-28 18:04     ` Paolo Bonzini
2020-11-06  1:16 ` [PATCH v14 12/13] KVM: nVMX: Add helper to check the vmcs01 MSR bitmap for MSR pass-through Yang Weijiang
2020-11-06  1:16 ` [PATCH v14 13/13] KVM: nVMX: Enable CET support for nested VMX Yang Weijiang
2021-01-28 17:57 ` [PATCH v14 00/13] Introduce support for guest CET feature Paolo Bonzini
2021-01-28 18:04   ` Sean Christopherson
2021-01-28 18:06     ` Paolo Bonzini
2021-01-28 18:24       ` Sean Christopherson

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