Hi Andre,

I follow the document https://git.linaro.org/landing-teams/working/arm/arm-reference-platforms.git/about/docs/basefvp/user-guide.rst, and I build a Linux-on-FVP environment successfully. However, I still cannot boot KVM, the details are as follows:

1.I make sure that two configuration files enable KVM (I guess these are the right configuration files), they are

layers/meta-arm/meta-arm-bsp/recipes-kernel/linux/files/tc0/defconfig:CONFIG_KVM=y

build-poky/tmp-poky/work-shared/fvp-base/kernel-source/arch/arm64/configs/defconfig:CONFIG_KVM=y

2.I follow the document https://git.linaro.org/landing-teams/working/arm/arm-reference-platforms.git/about/docs/basefvp/user-guide.rst. After building the whole software stack, I try several commands but the results show that KVM does not work. The screenshots are shown as followsI try three commands, "kvm-ok", "dmesg | grep KVM", and "grep -E -o 'vmx|svm' /proc/cpuinfo". But all of them show negative results.

I guess maybe the reason is that FVP configuration uses a KVM-unsupport CPU, but I do not know the right configuration, and the FVP documents do not mention anything about KVM.

And this is the FVP booting command in the scripts:

===

/FVP_Base_RevC-2xAEMv8A

-C pctl.startup=0.0.0.0

-C bp.secure_memory=0

-C cluster0.NUM_CORES=1

-C cluster1.NUM_CORES=1

-C cache_state_modelled=0

-C bp.pl011_uart0.untimed_fifos=1

-C bp.pl011_uart0.unbuffered_output=1

-C bp.pl011_uart0.out_file=uart0-1624328932274439497.log

-C bp.pl011_uart1.out_file=uart1-1624328932274439497.log

-C bp.secureflashloader.fname=<workspace>/build-poky/tmp-poky/deploy/images/fvp-base/bl1-fvp.bin

-C bp.flashloader0.fname=<workspace>/build-poky/tmp-poky/deploy/images/fvp-base/fip-fvp.bin

-C bp.hostbridge.interfaceName=tap0

-C bp.smsc_91c111.enabled=1

--data cluster0.cpu0=<workspace>/build-poky/tmp-poky/deploy/images/fvp-base/Image@0x80080000

--data cluster0.cpu0=<workspace>/build-poky/tmp-poky/deploy/images/fvp-base/fvp-base-gicv3-psci-custom.dtb@0x83000000

-C bp.ve_sysregs.mmbSiteDefault=0

-C bp.ve_sysregs.exit_on_shutdown=1

-C bp.virtioblockdevice.image_path=<workspace>/build-poky/tmp-poky/deploy/images/fvp-base/core-image-minimal-fvp-base.disk.img

===

If you can provide any kind of help, I appreciate it very much.

On Wed, 14 Apr 2021 02:37:07 +0000
胤桦陈 <yinhua_chen@outlook.com> wrote:

> Hi, Andre
>
> Do you mean that if I boot Linux on FVP, then I can run KVM on FVP? Since KVM is just a module in Linux?

Well, on ARM it's not a kernel module, but built-in to the kernel
image, but yes: You can run any normal KVM enabled kernel on
it. So just use the same recipe you would use on any other system to
run KVM guests.

Cheers,
Andre

> ________________________________
> From: André Przywara <andre.przywara@arm.com>
> Sent: Tuesday, March 30, 2021 18:22
> To: yinhua_chen@outlook.com <yinhua_chen@outlook.com>; kvmarm@lists.cs.columbia.edu <kvmarm@lists.cs.columbia.edu>
> Subject: Re: KVM/ARM64: Booting KVM on FVP/fastmodels
>
> On 29/03/2021 13:13, yinhua_chen@outlook.com wrote:
>
> Hi,
>
> > I want to boot KVM on simulators.
> >
> > I don't want to use QEMU since some features are only supported on
> > FVP/fastmodels now.
> >
> > However, I cannot find documents/blogs/wiki about booting KVM on
> > FVP/fastmodels.
> >
> > Does KVM support running on FVP?
>
> The FVP emulates the full architecture, including all exception levels
> (so also EL2), and the virtualization support of the GIC and the Generic
> Timer.
> So yes, the models fully support KVM (or any other hypervisor, for that
> matter), and are in fact often used for developing KVM support of new
> hardware features.
>
> So what are the problems that you are facing? Just running a kernel like
> you would normally do on the model should work out of the box.
> If you describe your setup and the error messages, we can probably help
> you better.
>
> Cheers,
> Andre
>
> >
> > Appreciate for your help!
> >
> > Sincerely,
> > Yinhua
> >
> > _______________________________________________
> > kvmarm mailing list
> > kvmarm@lists.cs.columbia.edu
> > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
> >
>