linux-kernel - Re: [PATCH v33 02/21] x86/cpufeatures: x86/msr: Add Intel SGX Launch Control hardware bits

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Message-ID: <20200625012832.GE21758@linux.intel.com>
Date:   Thu, 25 Jun 2020 04:28:32 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        linux-sgx@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jethro Beekman <jethro@...tanix.com>,
        akpm@...ux-foundation.org, andriy.shevchenko@...ux.intel.com,
        asapek@...gle.com, cedric.xing@...el.com, chenalexchen@...gle.com,
        conradparker@...gle.com, cyhanish@...gle.com,
        dave.hansen@...el.com, haitao.huang@...el.com,
        josh@...htriplett.org, kai.huang@...el.com, kai.svahn@...el.com,
        kmoy@...gle.com, ludloff@...gle.com, luto@...nel.org,
        nhorman@...hat.com, npmccallum@...hat.com, puiterwijk@...hat.com,
        rientjes@...gle.com, tglx@...utronix.de, yaozhangx@...gle.com
Subject: Re: [PATCH v33 02/21] x86/cpufeatures: x86/msr: Add Intel SGX Launch
 Control hardware bits

On Wed, Jun 24, 2020 at 07:34:40AM -0700, Sean Christopherson wrote:
> On Wed, Jun 24, 2020 at 03:04:34PM +0200, Borislav Petkov wrote:
> > On Thu, Jun 18, 2020 at 01:08:24AM +0300, Jarkko Sakkinen wrote:
> > > From: Sean Christopherson <sean.j.christopherson@...el.com>
> > > 
> > > Add X86_FEATURE_SGX_LC, which informs whether or not the CPU supports SGX
> > > Launch Control.
> > > 
> > > Add MSR_IA32_SGXLEPUBKEYHASH{0, 1, 2, 3}, which when combined contain a
> > > SHA256 hash of a 3072-bit RSA public key. SGX backed software packages, so
> > > called enclaves, are always signed. All enclaves signed with the public key
> > > are unconditionally allowed to initialize. [1]
> > > 
> > > Add FEATURE_CONTROL_SGX_LE_WR bit of the feature control MSR, which informs
> > 
> > LE_WR or LC_ENABLED?
> 
> It should be FEAT_CTL_SGX_LC_ENABLED, i.e. the actual code is correct.  We
> updated the #define to use the SDM name to be consistent with the other bits
> and neglected to update the changelog.
> 
> Thanks!
>  
> > With that addressed:
> > 
> > Reviewed-by: Borislav Petkov <bp@...e.de>

I'll update the commit according to this information.

> > 
> > -- 
> > Regards/Gruss,
> >     Boris.
> > 
> > https://people.kernel.org/tglx/notes-about-netiquette

Thank you.

/Jarkko