KVM (Kernel Virtual Machine) on Samsung Galaxy A6 (Exynos 7870)

[raspiduino]

I have an Galaxy A6 which has the Exynos 7870 CPU. I downloaded the kernel source from the Samsung source page, and when I typed

make menuconfig

it has the Virtualization option. So does that mean the CPU itself support KVM? Thanks!

I just compile the kernel, pack it to boot.img, put boot.img to the AP and flash it using Odin but not work. I want to try if KVM exist to run Windows ARM in QEMU kvm in Termux

 

[raspiduino]

Can you set up Windows Debug (https://docs.microsoft.com/en-us/wi...gger/setting-up-a-null-modem-cable-connection) and set up QEMU to output serial over network, then setup virtual serial port on a Windows machine that has Windbg, then use windbg to debug?

Searching on the Internet said that 0xc0000001 is related to hardware not working / not respoding. Maybe your KVM implementation has error OR I think the most common case some of your system register is not properly set (usually by phone's bootloader) for Windows to use.

 

[JhosephRF]

Will this kernel work on galaxy J7 metal (J710MN)? If it doesn't work, could you make a compilation?

 

[raspiduino]

Will this kernel work on galaxy J7 metal (J710MN)? If it doesn't work, could you make a compilation?

Not really sure. I don't have that phone model. You can go get your kernel source (from Samsung Open Source page), then apply the patch kvm.patch in the exynos-kvm-patch repo (either by hand or by git apply). Then compile, root the phone, flash new kernel and see if it works.

 

[JhosephRF]

Not really sure. I don't have that phone model. You can go get your kernel source (from Samsung Open Source page), then apply the patch kvm.patch in the exynos-kvm-patch repo (either by hand or by git apply). Then compile, root the phone, flash new kernel and see if it works.

In your post on Github there is a link to download the kernel with kvm support. I want to know if this kernel would work on Galaxy A6 Plus. Because this is the model available in my region, i don't know if the kernel of both smartphones are the same.

 

[raspiduino]

In your post on Github there is a link to download the kernel with kvm support. I want to know if this kernel would work on Galaxy A6 Plus. Because this is the model available in my region, i don't know if the kernel of both smartphones are the same.

I'm not really sure, but it worth a try.

If you buy a new A6+ phone to try this, I would recommend not to, since it might break the warranty.

If you already got one then just try it, the warranty is probably already outdated

 

[JhosephRF]

I'm not really sure, but it worth a try.

If you buy a new A6+ phone to try this, I would recommend not to, since it might break the warranty.

If you already got one then just try it, the warranty is probably already outdated

There is no kernel available for this version on the Samsung Open Source website

 

[raspiduino]

There is no kernel available for this version on the Samsung Open Source websiteView attachment 5709759View attachment 5709761

I think the most suitable should be the a605g kernel. Maybe a605g* models share the same kernel? I guess so

 

[raspiduino]

My a6lte is broken now, so I will not have anything to test the kernel on. Good luck for you all on the development of a6lte-kvm! Thank you for joining the thread!

Probably I will get a new Samsung Phone, but I have to wait until the warranty period ended to root the device.

See you soon.

 

[Ryujin96]

I tried your patch on my device, modified a little bit for calling your "preinit_hyp_mode()" function from "init/main.c". I can boot into stock rom, install termux on it and then install qemu-system-arm and qemu-system-aarch64. I also run "chmod 666 /dev/kvm". Then I tried qemu-system-aarch64 with --enable-kvm but it said kvm not found. I also tried qemu-system-arm but it said "kvm_init_vcpu failed: invalid argument". "/dev/kvm" is available. What am I doing wrong?

Also my hard keys (volume up/down and power key) don't work after booting with that kernel but it work with stock rom, although this is not the main problem.

Thanks!

how did u fix the error related to "preinit_hyp_mode()" function in "init/main.c"?

 

[raspiduino]

how did u fix the error related to "preinit_hyp_mode()" function in "init/main.c"?

Sorry for late reply. Now I finally remember how I did it.

If you mean "the error" is the phome can boot but you cannot start KVM QEMU, then here is the answer:

- DO NOT use Termux for this kind of things. Termux use proot (fake chroot, with fake "device call" simulation). We need to use some chroot apps, like Linux Deploy (available on Google Play, also open source, so it can really changes the hardware states.

If you are using a6lte:

- After installing Linux Deploy, install a chroot environment, selecting the architecture as ARMHF, and username as "root" in the setting. Also enable VNC

- Get the shell. Run `dpkg --add-architecture arm64`. Then `apt update`. Then `apt install qemu-system-arm`

- Now you should be able to use it

 

[arunkumar neelam]

Sorry for late reply. Now I finally remember how I did it.

If you mean "the error" is the phome can boot but you cannot start KVM QEMU, then here is the answer:

- DO NOT use Termux for this kind of things. Termux use proot (fake chroot, with fake "device call" simulation). We need to use some chroot apps, like Linux Deploy (available on Google Play, also open source, so it can really changes the hardware states.

If you are using a6lte:

- After installing Linux Deploy, install a chroot environment, selecting the architecture as ARMHF, and username as "root" in the setting. Also enable VNC

- Get the shell. Run `dpkg --add-architecture arm64`. Then `apt update`. Then `apt install qemu-system-arm`

- Now you should be able to use it

Sorry for late reply. Now I finally remember how I did it.

If you mean "the error" is the phome can boot but you cannot start KVM QEMU, then here is the answer:

- DO NOT use Termux for this kind of things. Termux use proot (fake chroot, with fake "device call" simulation). We need to use some chroot apps, like Linux Deploy (available on Google Play, also open source, so it can really changes the hardware states.

If you are using a6lte:

- After installing Linux Deploy, install a chroot environment, selecting the architecture as ARMHF, and username as "root" in the setting. Also enable VNC

- Get the shell. Run `dpkg --add-architecture arm64`. Then `apt update`. Then `apt install qemu-system-arm`

- Now you should be able to use it

Hello senior developer, have you solved running arm windows with kvm support?

 

[raspiduino]

Hello senior developer

I'm not event a developer, I'm a student

have you solved running arm windows with kvm support?

No actually, I'm too busy (for other stuff) for backporting PMU to my kernel. If your device runs a 4.14 or 5.x or (probably not yet) 6.x kernel, and you are able to get KVM on it, then you are good to go, since these things have been claimed to have PMU and boot Windows.

 

[lentas]

can you do same to galaxy s7 phone (exynos)

 

[raspiduino]

can you do same to galaxy s7 phone (exynos)

I'm not sure. You can try, the instructions are available on sleirsgoevy's repo.

 

[Ryujin96]

Anyone tried this limbo port on a kvm enabled kernel if this works out of the box without patching stuff? https://github.com/wasdwasd0105/limbo_tensor/releases