On Wed, Feb 15, 2023 at 04:26:18PM -1000, Richard Henderson wrote:
Date: Wed, 15 Feb 2023 16:26:18 -1000
From: Richard Henderson <richard.henderson@linaro.org>
To: Kenneth Lee <Kenneth-Lee-2012@foxmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: Does the page boundary check still necessary?
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
Thunderbird/102.7.1
On 2/15/23 15:45, Kenneth Lee wrote:
Now the chained TBs have been link with tb_link_page(), the chain will
be rebuilt if it is invalidate on page. So why is this check still there?
Even for a guest which doesn't use paging, and therefore does not need to
worry about memory maps changing, we still enable breakpoints and
watchpoints on a per-page basis.
Thank you. So is this the only reason? May I write a fine grained
checking to remove this limitation?
No.
Why?