Re: [Qemu-ppc] [Qemu-devel] Bad icount read when running qemu-system-ppc64 and mfspr atbu guest instruction

[Richard Henderson]

On 04/12/2018 04:18 AM, Darrell Leinwand wrote:
> Hi,
> 
> When I enable icount using an e5500 core I get an exit with “Bad icount
> read” when the guest software executes a load atbu command.

Yep, it looks like there are some bugs in the ppc front end wrt icount.

In target/ppc/translate_init.c, spr_read_tbu has the proper wrappers for
integrating with icount, but a few lines lower spr_read_atbl and spr_read_atbu
do not.

This will probably have to wait until the 2.13 cycle to fix...


r~


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