On Tue, 2019-06-11 at 09:51 +0200, Christophe Leroy wrote:
>
> Le 11/06/2019 à 09:24, Michael Neuling a écrit :
> > On Tue, 2019-06-11 at 08:48 +0200, Cédric Le Goater wrote:
> > > On 11/06/2019 08:44, Michael Neuling wrote:
> > > > > > 2:
> > > > > > -BEGIN_FTR_SECTION
> > > > > > - /*
Le 11/06/2019 à 09:24, Michael Neuling a écrit :
On Tue, 2019-06-11 at 08:48 +0200, Cédric Le Goater wrote:
On 11/06/2019 08:44, Michael Neuling wrote:
2:
-BEGIN_FTR_SECTION
- /* POWER9 with disabled DAWR */
+ LOAD_REG_ADDR(r11, dawr_force_enable)
+ lbz r11, 0(r11)
+
On Tue, 2019-06-11 at 08:48 +0200, Cédric Le Goater wrote:
> On 11/06/2019 08:44, Michael Neuling wrote:
> > > > 2:
> > > > -BEGIN_FTR_SECTION
> > > > - /* POWER9 with disabled DAWR */
> > > > + LOAD_REG_ADDR(r11, dawr_force_enable)
> > > > + lbz r11, 0(r11)
> > > > +
On 11/06/2019 08:44, Michael Neuling wrote:
>
>>> 2:
>>> -BEGIN_FTR_SECTION
>>> - /* POWER9 with disabled DAWR */
>>> + LOAD_REG_ADDR(r11, dawr_force_enable)
>>> + lbz r11, 0(r11)
>>> + cmpdi r11, 0
>>> li r3, H_HARDWARE
>>> - blr
>>> -END_FTR_SECTION_IFCLR(CPU_FTR_DAWR)
> > 2:
> > -BEGIN_FTR_SECTION
> > - /* POWER9 with disabled DAWR */
> > + LOAD_REG_ADDR(r11, dawr_force_enable)
> > + lbz r11, 0(r11)
> > + cmpdi r11, 0
> > li r3, H_HARDWARE
> > - blr
> > -END_FTR_SECTION_IFCLR(CPU_FTR_DAWR)
> > + beqlr
>
> Why is this a 'beqlr' ?
Hello Michael,
> --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
> +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
> @@ -822,18 +822,21 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
> mtspr SPRN_IAMR, r5
> mtspr SPRN_PSPB, r6
> mtspr SPRN_FSCR, r7
> - ld r5,
On Mon, 2019-04-01 at 06:03:12 UTC, Michael Neuling wrote:
> This adds a flag so that the DAWR can be enabled on P9 via:
> echo Y > /sys/kernel/debug/powerpc/dawr_enable_dangerous
>
> The DAWR was previously force disabled on POWER9 in:
> 9654153158 powerpc: Disable DAWR in the base POWER9
This adds a flag so that the DAWR can be enabled on P9 via:
echo Y > /sys/kernel/debug/powerpc/dawr_enable_dangerous
The DAWR was previously force disabled on POWER9 in:
9654153158 powerpc: Disable DAWR in the base POWER9 CPU features
Also see Documentation/powerpc/DAWR-POWER9.txt
This is a
