Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread David Woodhouse
On Sat, 2018-01-20 at 13:51 -0800, Steven Noonan wrote: > > > +#define X86_FEATURE_STIPB  (18*32+27) /* Speculation > Control with STIPB (Intel) */ > > Is this correct? I thought the acronym was "STIBP", i.e. > "Single-Thread Indrect Branch Prediction"? If so, then you've got the > B

Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread David Woodhouse
On Sat, 2018-01-20 at 13:51 -0800, Steven Noonan wrote: > > > +#define X86_FEATURE_STIPB  (18*32+27) /* Speculation > Control with STIPB (Intel) */ > > Is this correct? I thought the acronym was "STIBP", i.e. > "Single-Thread Indrect Branch Prediction"? If so, then you've got the > B

Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread Steven Noonan
On Sat, Jan 20, 2018 at 4:03 AM, David Woodhouse wrote: > Add three feature bits exposed by new microcode on Intel CPUs for > speculation control. We would now be up to five bits in CPUID(7).RDX > so take them out of the 'scattered' features and make a proper word > for them

Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread Steven Noonan
On Sat, Jan 20, 2018 at 4:03 AM, David Woodhouse wrote: > Add three feature bits exposed by new microcode on Intel CPUs for > speculation control. We would now be up to five bits in CPUID(7).RDX > so take them out of the 'scattered' features and make a proper word > for them instead. > >

Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread Borislav Petkov
On Sat, Jan 20, 2018 at 12:03:30PM +, David Woodhouse wrote: > Add three feature bits exposed by new microcode on Intel CPUs for > speculation control. We would now be up to five bits in CPUID(7).RDX > so take them out of the 'scattered' features and make a proper word > for them instead. ...

Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread Borislav Petkov
On Sat, Jan 20, 2018 at 12:03:30PM +, David Woodhouse wrote: > Add three feature bits exposed by new microcode on Intel CPUs for > speculation control. We would now be up to five bits in CPUID(7).RDX > so take them out of the 'scattered' features and make a proper word > for them instead. ...

[PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread David Woodhouse
Add three feature bits exposed by new microcode on Intel CPUs for speculation control. We would now be up to five bits in CPUID(7).RDX so take them out of the 'scattered' features and make a proper word for them instead. Signed-off-by: David Woodhouse ---

[PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control

2018-01-20 Thread David Woodhouse
Add three feature bits exposed by new microcode on Intel CPUs for speculation control. We would now be up to five bits in CPUID(7).RDX so take them out of the 'scattered' features and make a proper word for them instead. Signed-off-by: David Woodhouse --- arch/x86/include/asm/cpufeature.h