2018-04-16 20:32 GMT+02:00 Youquan Song <youquan.song@xxxxxxxxx>: > From: David Woodhouse <dwmw@xxxxxxxxxxxx> > > (cherry picked from commit dd84441a797150dcc49298ec95c459a8891d8bb1) > > Retpoline means the kernel is safe because it has no indirect branches. > But firmware isn't, so use IBRS for firmware calls if it's available. > > Block preemption while IBRS is set, although in practice the call sites > already had to be doing that. > > Ignore hpwdt.c for now. It's taking spinlocks and calling into firmware > code, from an NMI handler. I don't want to touch that with a bargepole. > > Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx> > Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: arjan.van.de.ven@xxxxxxxxx > Cc: bp@xxxxxxxxx > Cc: dave.hansen@xxxxxxxxx > Cc: jmattson@xxxxxxxxxx > Cc: karahmed@xxxxxxxxx > Cc: kvm@xxxxxxxxxxxxxxx > Cc: pbonzini@xxxxxxxxxx > Cc: rkrcmar@xxxxxxxxxx > Link: http://lkml.kernel.org/r/1519037457-7643-2-git-send-email-dwmw@xxxxxxxxxxxx > Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > [Youquan Song: port to 4.4] > Signed-off-by: Youquan Song <youquan.song@xxxxxxxxxxxxxxx> Hi Youquan, Thanks for doing this, do you have git tree for all these patches? One suggestion, for stable patch you'd better cc to stable@xxxxxxxxxxxxxxx Regards, Jack
