Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote:
> On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> >
> > Given that most rv64 implementations can't run in rv32 mode, what is the
> > failure mode if someone tries it with the compat mode enabled?
> A static linked simple hello_world could still run on a non-compat
> support hardware. But most rv32 apps would meet different userspace
> segment faults.
> 
> Current code would let the machine try the rv32 apps without detecting
> whether hw support or not.

Hmm, we probably want some kind of check for not even offer running
rv32 binaries.  I guess trying to write UXL some time during early
boot and catching the resulting exception would be the way to go?

> 
> 
> -- 
> Best Regards
>  Guo Ren
> 
> ML: https://lore.kernel.org/linux-csky/
---end quoted text---



[Index of Archives]     [Linux Kernel]     [Kernel Newbies]     [x86 Platform Driver]     [Netdev]     [Linux Wireless]     [Netfilter]     [Bugtraq]     [Linux Filesystems]     [Yosemite Discussion]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]

  Powered by Linux