linux-kernel - Re: [PATCH v13 03/13] x86/cpufeatures: Add Intel-defined SGX leaf CPUID_12

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Date:   Tue, 28 Aug 2018 10:23:55 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, linux-sgx@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...e.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Alexei Starovoitov <ast@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>,
        "open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)" 
        <kvm@...r.kernel.org>
Subject: Re: [PATCH v13 03/13] x86/cpufeatures: Add Intel-defined SGX leaf
 CPUID_12_EAX

On Mon, Aug 27, 2018 at 12:39:36PM -0700, Dave Hansen wrote:
> On 08/27/2018 11:53 AM, Jarkko Sakkinen wrote:
> > +	/* Intel SGX features: level 0x00000012 */
> > +	if (c->cpuid_level >= 0x00000012) {
> > +		cpuid(0x00000012, &eax, &ebx, &ecx, &edx);
> > +
> > +		c->x86_capability[CPUID_12_EAX] = eax;
> > +	}
> 
> I've given this specific bit of feedback at least once in the past.
> These patches are not ordered properly.  You introduce this in the next
> patch:
> 
> +#define SGX_CPUID 0x12

Yeah, my mistake probably when squashing fixups.

/Jarkko