Hi Tuomas,
On Fri, Sep 7, 2018 at 5:03 AM Tuomas Tynkkynen tuomas.tynkkynen@iki.fi wrote:
Hi Bin,
On 09/04/2018 12:31 PM, Bin Meng wrote:
Hi Lukas,
On Tue, Sep 4, 2018 at 5:39 AM Auer, Lukas lukas.auer@aisec.fraunhofer.de wrote:
On Thu, 2018-08-30 at 00:54 -0700, Bin Meng wrote:
This adds QEMU RISC-V 'virt' board target support, with the hope of helping people easily test U-Boot on RISC-V.
The QEMU virt machine models a generic RISC-V virtual machine with support for the VirtIO standard networking and block storage devices. It has CLINT, PLIC, 16550A UART devices in addition to VirtIO and it also uses device-tree to pass configuration information to guest software. It implements RISC-V privileged architecture spec v1.10.
Both 32-bit and 64-bit builds are supported. Support is pretty much preliminary, only booting to U-Boot shell with the UART driver on a single core. Booting Linux is not supported yet.
For your information and to avoid duplicate work, I am working on a patch set that improves RISC-V support in u-boot. I am currently able to boot Linux on a multi-core setup in QEMU, but they are not quite ready to submit yet.
This is great! My next step is to work on virtio driver support in U-Boot as qemu-riscv virt machine has these devices but we don't have corresponding drivers in U-Boot.
At some point I was working on porting the virtio stack from Linux to U-Boot and IIRC got virtio-blk and virtio-net working on ARM. But other things consumed my time and I never quite finished that work. Let me know if you want to take a look.
This is great. I just finished reading the virtio 1.0 spec and was about to start the work. My interest was to add virtio-blk and virtio-net driver to U-Boot too since they are most common devices (others are not used too much I believe). If you already have the drivers working, I can help to bring them upstream.
Regards, Bin