Re: [PATCH v12 03/13] x86/sgx: add SGX definitions to msr-index.h
From: Jarkko Sakkinen
Date: Wed Jul 04 2018 - 13:26:43 EST
On Tue, Jul 03, 2018 at 08:51:23PM +0200, Thomas Gleixner wrote:
> On Tue, 3 Jul 2018, Jarkko Sakkinen wrote:
> x86/msr: Add ....
> > From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
> > ENCLS and ENCLU are usable if and only if SGX_ENABLE is set and After
> > SGX is activated the IA32_SGXLEPUBKEYHASHn MSRs are writable if
> > SGX_LC_WR is set and the feature control is locked.
> > SGX related bits in IA32_FEATURE_CONTROL cannot be set before SGX is
> > activated by the pre-boot firmware. SGX activation is triggered by
> > setting bit 0 in the MSR 0x7a. Until SGX is activated, the LE hash MSRs
> > are writable to allow pre-boot firmware to lock down the LE root key
> > with a non-Intel value.
> > Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
> > Co-developed-by: Haim Cohen <haim.cohen@xxxxxxxxx>
> Lacks SOB
> > ---
> > arch/x86/include/asm/msr-index.h | 8 ++++++++
> > 1 file changed, 8 insertions(+)
> > diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
> > index fda2114197b3..a7355fb7344f 100644
> > --- a/arch/x86/include/asm/msr-index.h
> > +++ b/arch/x86/include/asm/msr-index.h
> > @@ -479,6 +479,8 @@
> > #define FEATURE_CONTROL_LOCKED (1<<0)
> > #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)
> Tabs not spaces please. checkpatch.pl would have told you
> > +#define FEATURE_CONTROL_SGX_LE_WR (1<<17)
Thanks, will refine!