Re: [Xen-devel] [PATCH v3 5/6] xen/arm: zynqmp: implement zynqmp_eemi

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Mon, 15 Oct 2018, Julien Grall wrote:
> (Resending the e-mail using a different smtp)
> 
> On 15/10/2018 08:32, Julien Grall wrote:
> > Hi,
> > 
> > On 10/10/2018 11:49 PM, Stefano Stabellini wrote:
> > > On Tue, 28 Aug 2018, Julien Grall wrote:
> > > > Hi Stefano,
> > > > 
> > > > On 11/08/18 01:01, Stefano Stabellini wrote:
> > > > > From: "Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxxx>
> > > > > 
> > > > > From: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
> > > > > 
> > > > > zynqmp_eemi uses the defined functions and structs to decide whether
> > > > > to
> > > > > make a call to the firmware, or to simply return a predefined value.
> > > > > 
> > > > > Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
> > > > > Signed-off-by: Stefano Stabellini <stefanos@xxxxxxxxxx>
> > > > > ---
> > > > >    xen/arch/arm/platforms/xilinx-zynqmp-eemi.c | 143
> > > > > +++++++++++++++++++++++++++-
> > > > >    1 file changed, 142 insertions(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
> > > > > b/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
> > > > > index 62cc15c..1dbdf04 100644
> > > > > --- a/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
> > > > > +++ b/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
> > > > > @@ -808,7 +808,148 @@ static bool domain_has_mmio_access(struct domain
> > > > > *d,
> > > > >      bool zynqmp_eemi(struct cpu_user_regs *regs)
> > > > >    {
> > > > > -    return false;
> > > > > +    struct arm_smccc_res res;
> > > > > +    bool is_mmio_write = false;
> > > > > +    uint32_t fid = get_user_reg(regs, 0);
> > > > > +    uint32_t nodeid = get_user_reg(regs, 1);
> > > > > +    unsigned int pm_fn = fid & 0xFFFF;
> > > > 
> > > > Here you will receive all the function ID for the SIP subsystem. Can you
> > > > confirm the EEMI can be accessed from both SMC32 and SMC64 convention?
> > > 
> > > Yep
> > 
> > Can you point me to the documentation? For instance, CALL_COUNT, UID and
> > VERSION are only accessible via SMC32.

https://www.xilinx.com/support/documentation/user_guides/ug1200-eemi-api.pdf

I am checking if there is a newer version of it.

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