From: Paolo Bonzini <pbonzini@redhat.com>
To: Yang Weijiang <weijiang.yang@intel.com>,
rkrcmar@redhat.com, sean.j.christopherson@intel.com,
jmattson@google.com, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, mst@redhat.com, yu-cheng.yu@intel.com,
yi.z.zhang@intel.com, hjl.tools@gmail.com
Cc: Zhang Yi Z <yi.z.zhang@linux.intel.com>
Subject: Re: [PATCH v2 3/7] KVM:CPUID: Add CPUID support for CET xsaves component query.
Date: Fri, 25 Jan 2019 18:57:10 +0100 [thread overview]
Message-ID: <249c8543-4b87-8fd2-2e1d-68b72ee62c61@redhat.com> (raw)
In-Reply-To: <20190122205909.24165-4-weijiang.yang@intel.com>
On 22/01/19 21:59, Yang Weijiang wrote:
> */
> entry->edx |= F(ARCH_CAPABILITIES);
> + /*
> + * If host doesn't have CET capability,
> + * do not report CET related info.
> + */
> + if (!boot_cpu_has(X86_FEATURE_SHSTK))
> + entry->ecx &= ~F(SHSTK);
> +
> + if (!boot_cpu_has(X86_FEATURE_IBT))
> + entry->edx &= ~F(IBT);
> +
This is not needed, it is implied by
cpuid_mask(&entry->ecx, CPUID_7_ECX);
cpuid_mask(&entry->edx, CPUID_7_EDX);
earlier in the function.
Paolo
next prev parent reply other threads:[~2019-01-25 17:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-22 20:59 [PATCH v2 0/7] This patch-set is to enable Guest CET support Yang Weijiang
2019-01-22 20:59 ` [PATCH v2 1/7] KVM:VMX: Define CET VMCS fields and bits Yang Weijiang
2019-01-25 18:02 ` Paolo Bonzini
2019-01-28 10:33 ` Yang Weijiang
2019-01-29 15:19 ` Paolo Bonzini
2019-01-29 8:29 ` Yang Weijiang
2019-01-30 8:32 ` Paolo Bonzini
2019-03-04 18:56 ` Sean Christopherson
2019-03-08 9:15 ` Paolo Bonzini
2019-03-08 15:50 ` Sean Christopherson
2019-03-08 16:34 ` Paolo Bonzini
2019-01-25 22:30 ` Sean Christopherson
2019-01-29 17:47 ` Jim Mattson
2019-01-29 18:01 ` Jim Mattson
[not found] ` <20190129182750.GB8156@linux.intel.com>
2019-01-29 8:34 ` Yang Weijiang
2019-01-22 20:59 ` [PATCH v2 2/7] KVM:CPUID: Define CET CPUID bits and CR4.CET master enable bit Yang Weijiang
2019-01-22 20:59 ` [PATCH v2 3/7] KVM:CPUID: Add CPUID support for CET xsaves component query Yang Weijiang
2019-01-25 17:57 ` Paolo Bonzini [this message]
2019-01-25 22:40 ` Sean Christopherson
2019-01-22 20:59 ` [PATCH v2 4/7] KVM:CPUID: Fix xsaves area size calculation for CPUID.(EAX=0xD,ECX=1) Yang Weijiang
2019-01-25 22:47 ` Sean Christopherson
2019-01-22 20:59 ` [PATCH v2 5/7] KVM:VMX: Pass through host CET related MSRs to Guest Yang Weijiang
2019-01-25 22:50 ` Sean Christopherson
2019-01-22 20:59 ` [PATCH v2 6/7] KVM:VMX: Load Guest CET via VMCS when CET is enabled in Guest Yang Weijiang
2019-01-25 22:56 ` Sean Christopherson
2019-01-30 15:16 ` Yang Weijiang
2019-01-22 20:59 ` [PATCH v2 7/7] KVM:X86: Enable MSR_IA32_XSS bit 11 and 12 for CET xsaves/xrstors Yang Weijiang
2019-01-25 23:03 ` Sean Christopherson
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