On 2020-11-20 23:53, Nick Desaulniers wrote:
On Fri, Nov 20, 2020 at 3:30 PM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
On Fri, 20 Nov 2020 at 21:19, Nick Desaulniers
<ndesaulniers@xxxxxxxxxx> wrote:
>
> On Fri, Nov 20, 2020 at 2:30 AM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
> >
> > On Thu, 19 Nov 2020 at 00:42, Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote:
> > >
> > > Thanks for continuing to drive this series Sami. For the series,
> > >
> > > Tested-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> > >
> > > I did virtualized boot tests with the series applied to aarch64
> > > defconfig without CONFIG_LTO, with CONFIG_LTO_CLANG, and a third time
> > > with CONFIG_THINLTO. If you make changes to the series in follow ups,
> > > please drop my tested by tag from the modified patches and I'll help
> > > re-test. Some minor feedback on the Kconfig change, but I'll post it
> > > off of that patch.
> > >
> >
> > When you say 'virtualized" do you mean QEMU on x86? Or actual
> > virtualization on an AArch64 KVM host?
>
> aarch64 guest on x86_64 host. If you have additional configurations
> that are important to you, additional testing help would be
> appreciated.
>
Could you run this on an actual phone? Or does Android already ship
with this stuff?
By `this`, if you mean "the LTO series", it has been shipping on
Android phones for years now, I think it's even required in the latest
release.
If you mean "the LTO series + mainline" on a phone, well there's the
android-mainline of https://android.googlesource.com/kernel/common/,
in which this series was recently removed in order to facilitate
rebasing Android's patches on ToT-mainline until getting the series
landed upstream. Bit of a chicken and the egg problem there.
If you mean "the LTO series + mainline + KVM" on a phone; I don't know
the precise state of aarch64 KVM and Android (Will or Marc would
know).
If you are lucky enough to have an Android system booting at EL2,
KVM should just works [1], though I haven't tried with this series.
We did experiment recently with RockPI's for aach64 KVM, IIRC;
I think Android is tricky as it still requires A64+A32/T32 chipsets,
Which is about 100% of the Android systems at the moment (I don't think
any of the asymmetric SoCs are in the wild yet). It doesn't really
affect
KVM anyway.
M.
[1] with the broken firmware gotchas that I believed to be erradicated
8 years ago, but are still prevalent in the Android world: laughable
PSCI implementation, invalid CNTFRQ_EL0...
--
Who you jivin' with that Cosmik Debris?
