Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v2 5/5] x86/pti: Do not enable PTI on fixed Intel
 processors
To:     David Woodhouse <dwmw@amazon.co.uk>, arjan@linux.intel.com,
        tglx@linutronix.de, karahmed@amazon.de, x86@kernel.org,
        linux-kernel@vger.kernel.org, tim.c.chen@linux.intel.com,
        bp@alien8.de, peterz@infradead.org, pbonzini@redhat.com,
        ak@linux.intel.com, torvalds@linux-foundation.org,
        gregkh@linux-foundation.org, thomas.lendacky@amd.com
References: <1516726375-25168-1-git-send-email-dwmw@amazon.co.uk>
 <1516726375-25168-6-git-send-email-dwmw@amazon.co.uk>
From:   Dave Hansen <dave.hansen@intel.com>
Message-ID: <736fa9c9-d651-b6ef-802c-d02a27c28ab9@intel.com>
Date:   Tue, 23 Jan 2018 10:41:10 -0800
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.5.0
MIME-Version: 1.0
In-Reply-To: <1516726375-25168-6-git-send-email-dwmw@amazon.co.uk>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 01/23/2018 08:52 AM, David Woodhouse wrote:
> When they advertise the IA32_ARCH_CAPABILITIES MSR and it has the RDCL_NO
> bit set, they don't need KPTI either.

Also, I hate to ask...  Have you tested this patch?