Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-11 Thread Tom Lendacky
On 7/11/2017 12:56 AM, Borislav Petkov wrote: On Tue, Jul 11, 2017 at 01:07:46AM -0400, Brian Gerst wrote: If I make the scattered feature support conditional on CONFIG_X86_64 (based on comment below) then cpu_has() will always be false unless CONFIG_X86_64 is enabled. So this won't need to be w

Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-11 Thread Tom Lendacky
On 7/11/2017 12:07 AM, Brian Gerst wrote: On Mon, Jul 10, 2017 at 3:41 PM, Tom Lendacky wrote: On 7/8/2017 7:50 AM, Brian Gerst wrote: On Fri, Jul 7, 2017 at 9:38 AM, Tom Lendacky wrote: Update the CPU features to include identifying and reporting on the Secure Memory Encryption (SME) feat

Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-10 Thread Borislav Petkov
On Tue, Jul 11, 2017 at 01:07:46AM -0400, Brian Gerst wrote: > > If I make the scattered feature support conditional on CONFIG_X86_64 > > (based on comment below) then cpu_has() will always be false unless > > CONFIG_X86_64 is enabled. So this won't need to be wrapped by the > > #ifdef. > > If you

Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-10 Thread Brian Gerst
On Mon, Jul 10, 2017 at 3:41 PM, Tom Lendacky wrote: > On 7/8/2017 7:50 AM, Brian Gerst wrote: >> >> On Fri, Jul 7, 2017 at 9:38 AM, Tom Lendacky >> wrote: >>> >>> Update the CPU features to include identifying and reporting on the >>> Secure Memory Encryption (SME) feature. SME is identified by

Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-10 Thread Tom Lendacky
On 7/8/2017 7:50 AM, Brian Gerst wrote: On Fri, Jul 7, 2017 at 9:38 AM, Tom Lendacky wrote: Update the CPU features to include identifying and reporting on the Secure Memory Encryption (SME) feature. SME is identified by CPUID 0x801f, but requires BIOS support to enable it (set bit 23 of M

Re: [PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-08 Thread Brian Gerst
On Fri, Jul 7, 2017 at 9:38 AM, Tom Lendacky wrote: > Update the CPU features to include identifying and reporting on the > Secure Memory Encryption (SME) feature. SME is identified by CPUID > 0x801f, but requires BIOS support to enable it (set bit 23 of > MSR_K8_SYSCFG). Only show the SME f

[PATCH v9 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature

2017-07-07 Thread Tom Lendacky
Update the CPU features to include identifying and reporting on the Secure Memory Encryption (SME) feature. SME is identified by CPUID 0x801f, but requires BIOS support to enable it (set bit 23 of MSR_K8_SYSCFG). Only show the SME feature as available if reported by CPUID and enabled by BIOS.