linux-kernel - Re: [PATCH v6 05/11] x86: add SGX MSRs to msr-index.h

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Date:   Tue, 28 Nov 2017 09:22:48 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Haim Cohen <haim.cohen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Len Brown <len.brown@...el.com>,
        Kyle Huey <me@...ehuey.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Kan Liang <Kan.liang@...el.com>,
        Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>
Subject: Re: [PATCH v6 05/11] x86: add SGX MSRs to msr-index.h

On Sat, 2017-11-25 at 21:29 +0200, Jarkko Sakkinen wrote:
> From: Haim Cohen <haim.cohen@...el.com>
> 
> These MSRs hold the SHA256 checksum of the currently configured root
> key for enclave signatures.

The commit message doesn't talk about the launch control bit in the
feature control MSR.

> 
> Signed-off-by: Haim Cohen <haim.cohen@...el.com>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
>  arch/x86/include/asm/msr-index.h | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/x86/include/asm/msr-index.h
> b/arch/x86/include/asm/msr-index.h
> index b35cb98b5d60..22e27d46d046 100644
> --- a/arch/x86/include/asm/msr-index.h
> +++ b/arch/x86/include/asm/msr-index.h
> @@ -436,6 +436,7 @@
>  #define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX	(1<<1)
>  #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX	(1<<2)
>  #define FEATURE_CONTROL_SGX_ENABLE                      (1<<18)
> +#define FEATURE_CONTROL_SGX_LAUNCH_CONTROL_ENABLE	(1<<17)
>  #define FEATURE_CONTROL_LMCE				(1<<20)
>  
>  #define MSR_IA32_APICBASE		0x0000001b
> @@ -502,6 +503,12 @@
>  #define PACKAGE_THERM_INT_LOW_ENABLE		(1 << 1)
>  #define PACKAGE_THERM_INT_PLN_ENABLE		(1 << 24)
>  
> +/* Intel SGX MSRs */
> +#define MSR_IA32_SGXLEPUBKEYHASH0	0x0000008C
> +#define MSR_IA32_SGXLEPUBKEYHASH1	0x0000008D
> +#define MSR_IA32_SGXLEPUBKEYHASH2	0x0000008E
> +#define MSR_IA32_SGXLEPUBKEYHASH3	0x0000008F
> +
>  /* Thermal Thresholds Support */
>  #define THERM_INT_THRESHOLD0_ENABLE    (1 << 15)
>  #define THERM_SHIFT_THRESHOLD0        8