Re: powerpc/64: set DSCR default initially from SPR

2017-11-14 Thread Michael Ellerman
On Tue, 2017-10-24 at 11:44:44 UTC, Nicholas Piggin wrote: > Take the DSCR value set by firmware as the dscr_default value, > rather than zero. > > POWER9 recommends DSCR default to a non-zero value. > > From: Nicholas Piggin Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/16

Re: [PATCH] powerpc/64: set DSCR default initially from SPR

2017-10-25 Thread Nicholas Piggin
On Wed, 25 Oct 2017 12:01:10 +0200 Michael Ellerman wrote: > Nicholas Piggin writes: > > > Take the DSCR value set by firmware as the dscr_default value, > > rather than zero. > > > > POWER9 recommends DSCR default to a non-zero value. > > > > From: Nicholas Piggin > > --- > > This has a probl

Re: [PATCH] powerpc/64: set DSCR default initially from SPR

2017-10-25 Thread Michael Ellerman
Nicholas Piggin writes: > Take the DSCR value set by firmware as the dscr_default value, > rather than zero. > > POWER9 recommends DSCR default to a non-zero value. > > From: Nicholas Piggin > --- > This has a problem that OS which set the DSCR to non-default > then kexec to Linux will be used a

[PATCH] powerpc/64: set DSCR default initially from SPR

2017-10-24 Thread Nicholas Piggin
Take the DSCR value set by firmware as the dscr_default value, rather than zero. POWER9 recommends DSCR default to a non-zero value. From: Nicholas Piggin --- This has a problem that OS which set the DSCR to non-default then kexec to Linux will be used as our default. I send a corresponding patc