[U-Boot] [PATCH v7 3/9] armv8: Add Secure Monitor/Hypervisor Call (SMC/HVC) infrastructure

[Tom Rini]

On Thu, Jan 07, 2016 at 04:06:55PM +0100, Michal Simek wrote:
> On 6.1.2016 14:04, Mateusz Kulikowski wrote:
> > On 14.10.2015 18:55, Sergey Temerkhanov wrote:
> >> This commit adds functions issuing calls to secure monitor or
> >> hypervisore. This allows using services such as Power State
> >> Coordination Interface (PSCI) provided by firmware, e.g. ARM
> >> Trusted Firmware (ATF)
> > 
> >> The SMC call can destroy all registers declared temporary by the
> >> calling conventions. The clobber list is "x0..x17" because of
> >> this
> > 
> >> Signed-off-by: Sergey Temerkhanov <s.temerkhanov at gmail.com>
> >> Signed-off-by: Corey Minyard <cminyard at mvista.com>
> >> Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla at cavium.com>
> >> Reviewed-by: Simon Glass <sjg at chromium.org>
> > 
> > +1 (I may need it as well)
> > 
> > Tested-by: Mateusz Kulikowski <mateusz.kulikowski at gmail.com>
> > 
> > Tested on: Hikey
> > Methodology:
> > 
> > Hacked smc handler in arm trusted firmware (x0=x0+x1, x1=x2+x3, x2=x4+x5, x3=x6+2)
> > +new u-boot command (smc/hvc) using functions from this patch;
> > 
> > I didn't tested hvc code (would need to make some fake hypervisor), but it's basically the same.
> > 
> > Idea: perhaps after this series is merged we can add 2 new commands to u-boot (SMC/HVC) to 
> > play with hypervisors/secure monitors (and perhaps use some simple functionality if needed).
> 
> How this should look like?
> 
> Definitely I would like to see this code in mainline because we have
> code which needs to call SMCs.

I guess the answer is we either need the cavium board series re-posted
without the device-tree binding change that is causing consternation
elsewhere or come up with something else there, or I just pull parts of
the series.  I'm not quite sure which is best at this point..

-- 
Tom
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