[PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1
Chris.Brandt at renesas.com
Wed Mar 8 10:53:37 PST 2017
On Thursday, February 16, 2017, Russell King wrote:
> On Thu, Feb 16, 2017 at 05:57:53PM +0100, Arnd Bergmann wrote:
> > On Thu, Feb 16, 2017 at 5:44 PM, Russell King - ARM Linux
> > <linux at armlinux.org.uk> wrote:
> > > On Thu, Feb 16, 2017 at 11:17:39AM -0500, Chris Brandt wrote:
> > >> The PL310 in the Renesas RZ/A1 SoC (R7S72100) does not have the
> > >> sideband signals connected between the CPU and L2C. According the
> > >> PL310 TRM, sideband signals are optional.
> > >>
> > >> If a PL310 is added to a system, but the sideband signals are not
> > >> connected, some Cortex A9 optimizations cannot be used. In
> > >> particular, enabling Full Line Zeros in the CA9 without sidebands
> > >> connected will crash the system since the CA9 will expect the L2C
> > >> to perform operations, yet the L2C never gets the commands.
> > >>
> > >> This series adds the option to not enable anything in the PL310
> > >> that uses sidebands, and then adds L2C support to the RZ/A1 DT.
> > >>
> > >> v4:
> > >> * changed l2x0_bresp_dis to l2x0_bresp_disable
> > >> * changed l2x0_flz_dis to l2x0_flz_disable
> > >
> > > Looks good, thanks.
> > >
> > > I'll want to merge patch 1, but I suspect the other two patches need
> > > to go through arm-soc, which will cause a problem due to being
> > > merged independently... Arnd?
> > I just checked what we have queued up in next/dt for this platform,
> > and I'm fairly sure that there are no conflicts, so you can pick up
> > all three and add
> > Acked-by: Arnd Bergmann <arnd at arndb.de>
> Chris, can you put all three in the patch system, preferably with Arnd's
> ack for the last two please?
These are still sitting in the patch system. Was there something wrong with
them that they would not go into 4.11?
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