Re: [Qemu-devel] [Bug 1815078] Re: Qemu 3.1.0 risc-v mie.MEIE

[Alistair Francis]

On Wed, Feb 13, 2019 at 11:02 PM RTOS Pharos <address@hidden> wrote:
>
> So I tried it but got the error:
>
> ERROR: missing file ../qemu-3.1.0/ui/keycodemapdb/README
>
> This is not a GIT checkout but module content appears to
> be missing. Do not use 'git archive' or GitHub download links
> to acquire QEMU source archives. Non-GIT builds are only
> supported with source archives linked from:
>
>   https://www.qemu.org/download/
>
> Developers working with GIT can use scripts/archive-source.sh
> if they need to create valid source archives.
>
> Makefile.cross-compiler:259: recipe for target 'qemu-3.1' failed
> make: *** [qemu-3.1] Error 1
>
>
> Get this is standard error, but I don't have time now to see how to work
> around it. Maybe later I can

The error describes how to fix the error. Just git clone the QEMU
source directly instead of using the GitHub tarballs.

Alistair

>
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> https://bugs.launchpad.net/bugs/1815078
>
> Title:
>   Qemu 3.1.0 risc-v mie.MEIE
>
> Status in QEMU:
>   Fix Committed
>
> Bug description:
>   Hello all,
>
>   There is a bug in qemu for Risc-v, related to the mie register: when
>   we try to set the MEIE bit (11) nothing is done, even when we are
>   running at machine mode.
>
>   Li   a0 , 1 << 11
>   Csrs mie , a0
>
>   And when we read mie it is as though nothing was done.
>
>   Going through the qemu source code I was able to correct it: on file
>   op_helper.c, line 94, the variable all_ints should be initialized
>   with:
>
>   uint64_t all_ints = delegable_ints | MIP_MSIP | MIP_MTIP | MIP_MEIP;
>
>   That is, the MIP_MEIP was missing.
>
>   I've successfully triggered uart interrupts with this patch (virt
>   machine).
>
>   All the best,
>   Pharos team
>
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