[PATCH v6 1/3] ivtv: use arch_phys_wc_add() and require PAT disabled

2015-06-11 Thread Luis R. Rodriguez
From: "Luis R. Rodriguez" We are burrying direct access to MTRR code support on x86 in order to take advantage of PAT. In the future we also want to make the default behaviour of ioremap_nocache() to use strong UC, use of mtrr_add() on those systems would make write-combining void. In order to h

Re: [PATCH v6 1/3] ivtv: use arch_phys_wc_add() and require PAT disabled

2015-06-08 Thread Hans Verkuil
On 06/09/2015 02:56 AM, Mauro Carvalho Chehab wrote: > Em Mon, 08 Jun 2015 17:20:20 -0700 > "Luis R. Rodriguez" escreveu: > >> From: "Luis R. Rodriguez" >> >> We are burrying direct access to MTRR code support on >> x86 in order to take advantage of PAT. In the future we >> also want to make the

Re: [PATCH v6 1/3] ivtv: use arch_phys_wc_add() and require PAT disabled

2015-06-08 Thread Mauro Carvalho Chehab
Em Mon, 08 Jun 2015 17:20:20 -0700 "Luis R. Rodriguez" escreveu: > From: "Luis R. Rodriguez" > > We are burrying direct access to MTRR code support on > x86 in order to take advantage of PAT. In the future we > also want to make the default behaviour of ioremap_nocache() > to use strong UC, use

[PATCH v6 1/3] ivtv: use arch_phys_wc_add() and require PAT disabled

2015-06-08 Thread Luis R. Rodriguez
From: "Luis R. Rodriguez" We are burrying direct access to MTRR code support on x86 in order to take advantage of PAT. In the future we also want to make the default behaviour of ioremap_nocache() to use strong UC, use of mtrr_add() on those systems would make write-combining void. In order to h