Re: [PATCHv4 2/2] arm-virt: add secure pl061 for reset/power down

[Peter Maydell]

On Thu, 14 Jan 2021 at 11:24, Maxim Uvarov <maxim.uvarov@linaro.org> wrote:
>
> On Thu, 14 Jan 2021 at 14:22, Maxim Uvarov <maxim.uvarov@linaro.org> wrote:
> > Does that mean that in that case you need all regions to be 64k
> > aligned? I mean secure and non-secure.
> > Has anybody tested 64k pages under qemu?
> >     [VIRT_GIC_V2M] =            { 0x08020000, 0x00001000 }
> >     [VIRT_UART] =               { 0x09000000, 0x00001000 },
> >     [VIRT_RTC] =                { 0x09010000, 0x00001000 },
> >     [VIRT_GPIO] =               { 0x09030000, 0x00001000 },
> >     [VIRT_SECURE_GPIO] =        { 0x09031000, 0x00001000 },
> >     [VIRT_SECURE_UART] =        { 0x09040000, 0x00001000 },
> >    [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
> >
> > Maxim.
>
> I.e. I see comment:
>  * Note that devices should generally be placed at multiples of 0x10000,
>  * to accommodate guests using 64K pages.
>  */
>
> but it's not clear why UART, RTC and GPIO is not aligned to 64k.

Er, 0x09000000, 0x09010000 and 0x09030000 are all 64K aligned addresses.

thanks
-- PMM