| Message ID | 1370625473-21628-1-git-send-email-jonathan.austin@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Jun 07, 2013 at 06:17:53PM +0100, Jonathan Austin wrote: > The support for the MPU is currently implemented only for R-class > (PMSAv7/R). Since the merge of V7M support in to the kernel it is possible > to select MPU support on V7M. > > This patch ensures that until MPU support for M-class processors is > implemented, the MPU can only be selected with R-class CPUs > > Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> > Cc: Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de> > --- > > This patch is necessary now that Russell has merged the V7M work in to his > devel-stable branch. > > I don't have any immediate plans to implement MPU support for M-class, so this > patch is important to ensure we don't break building of V7M platforms. Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> I didn't check, but that might affect other nommu configs for pre-v7 cpu's, too. (I think there is support for an at91 in the tree?!) Best regards Uwe > arch/arm/Kconfig-nommu | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu > index db597e1..aed66d5 100644 > --- a/arch/arm/Kconfig-nommu > +++ b/arch/arm/Kconfig-nommu > @@ -53,6 +53,7 @@ config REMAP_VECTORS_TO_RAM > > config ARM_MPU > bool 'Use the ARM v7 PMSA Compliant MPU' > + depends on CPU_V7 > default y > help > Some ARM systems without an MMU have instead a Memory Protection > -- > 1.7.9.5 > > >
On 07/06/13 19:11, Uwe Kleine-König wrote: > On Fri, Jun 07, 2013 at 06:17:53PM +0100, Jonathan Austin wrote: >> The support for the MPU is currently implemented only for R-class >> (PMSAv7/R). Since the merge of V7M support in to the kernel it is possible >> to select MPU support on V7M. >> >> This patch ensures that until MPU support for M-class processors is >> implemented, the MPU can only be selected with R-class CPUs >> >> Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> >> Cc: Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de> >> --- >> >> This patch is necessary now that Russell has merged the V7M work in to his >> devel-stable branch. >> >> I don't have any immediate plans to implement MPU support for M-class, so this >> patch is important to ensure we don't break building of V7M platforms. > Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > I didn't check, but that might affect other nommu configs for pre-v7 > cpu's, too. (I think there is support for an at91 in the tree?!) > Thanks Uwe, You're right - I just checked and without this patch we cause issues with at91x40_defconfig. This patch *does* fix that too. I've added your acked-by and this time I've got the 'ö' :) Jonny
diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu index db597e1..aed66d5 100644 --- a/arch/arm/Kconfig-nommu +++ b/arch/arm/Kconfig-nommu @@ -53,6 +53,7 @@ config REMAP_VECTORS_TO_RAM config ARM_MPU bool 'Use the ARM v7 PMSA Compliant MPU' + depends on CPU_V7 default y help Some ARM systems without an MMU have instead a Memory Protection
The support for the MPU is currently implemented only for R-class (PMSAv7/R). Since the merge of V7M support in to the kernel it is possible to select MPU support on V7M. This patch ensures that until MPU support for M-class processors is implemented, the MPU can only be selected with R-class CPUs Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Cc: Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de> --- This patch is necessary now that Russell has merged the V7M work in to his devel-stable branch. I don't have any immediate plans to implement MPU support for M-class, so this patch is important to ensure we don't break building of V7M platforms. arch/arm/Kconfig-nommu | 1 + 1 file changed, 1 insertion(+)