在 2018/2/6 16:59, Andrew Cooper 写道:
On 06/02/2018 08:43, Zhenzhong Duan wrote:
When ( ibrs && thunk == THUNK_DEFAULT && !retpoline_safe() ) is true,
thunk is set to THUNK_JMP rather than THUNK_RETPOLINE.
When (!ibrs && thunk == THUNK_DEFAULT && !retpoline_safe() ) is true,
we should do the same.
Signed-off-by: Zhenzhong Duan <zhenzhong.d...@oracle.com>
Why? What improvement is this intended to give?
No improvement, I just feel if retpoline isn't safe, THUNK_JMP is better
and safer.
Above first check is working that way.
(IOW, the logic here is deliberate, and has a specific purpose.)
Ok, Just ignore the noise if it's deliberate.
--
thanks
zduan
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