Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On Fri, Nov 10, 2017 at 2:09 PM, Dave Hansen wrote: > On 11/10/2017 02:03 PM, Andy Lutomirski wrote: >>> +static inline u16 kern_asid(u16 asid) >>> +{ >>> + VM_WARN_ON_ONCE(asid > MAX_ASID_AVAILABLE); >>> + /* >>> +* If PCID is on, ASID-aware code

Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On Fri, Nov 10, 2017 at 2:09 PM, Dave Hansen wrote: > On 11/10/2017 02:03 PM, Andy Lutomirski wrote: >>> +static inline u16 kern_asid(u16 asid) >>> +{ >>> + VM_WARN_ON_ONCE(asid > MAX_ASID_AVAILABLE); >>> + /* >>> +* If PCID is on, ASID-aware code paths put the ASID+1 into the

Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On 11/10/2017 02:03 PM, Andy Lutomirski wrote: >> +static inline u16 kern_asid(u16 asid) >> +{ >> + VM_WARN_ON_ONCE(asid > MAX_ASID_AVAILABLE); >> + /* >> +* If PCID is on, ASID-aware code paths put the ASID+1 into the PCID >> +* bits. This serves two purposes. It

Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On 11/10/2017 02:03 PM, Andy Lutomirski wrote: >> +static inline u16 kern_asid(u16 asid) >> +{ >> + VM_WARN_ON_ONCE(asid > MAX_ASID_AVAILABLE); >> + /* >> +* If PCID is on, ASID-aware code paths put the ASID+1 into the PCID >> +* bits. This serves two purposes. It

Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On Fri, Nov 10, 2017 at 11:31 AM, Dave Hansen wrote: > > From: Dave Hansen > > There are effectively two ASID types: > 1. The one stored in the mmu_context that goes from 0->5 > 2. The one programmed into the hardware that goes from 1->6

Re: [PATCH 21/30] x86, mm: put mmu-to-h/w ASID translation in one place

On Fri, Nov 10, 2017 at 11:31 AM, Dave Hansen wrote: > > From: Dave Hansen > > There are effectively two ASID types: > 1. The one stored in the mmu_context that goes from 0->5 > 2. The one programmed into the hardware that goes from 1->6 > > This consolidates the locations where converting