[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC 01/10] target-arm: protect cpu_exclusive_*.
|
From: |
Paolo Bonzini |
|
Subject: |
Re: [Qemu-devel] [RFC 01/10] target-arm: protect cpu_exclusive_*. |
|
Date: |
Tue, 03 Mar 2015 16:32:04 +0100 |
|
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
On 03/03/2015 16:29, Mark Burton wrote:
>
> ps. on our bug - we believe somehow the STREX is being marked as
> failed, but actually succeeds to write something. There are only 3
> ways the strex can fail: 1/ the address doesn't match - in which case
> no ST will be attempted 2/ the value doesn't match - which means - no
> ST attempted 3/ the store starts, but causes a TLB fill/exception…
>
> The 3rd has 2 possibilities - the TLB is filled, and the store goes
> ahead totally normally - there should be no ‘fail’ - or an exception
> is generated in which case we will long jump away and never return.
When do you release the lock?
Paolo