Re: [Xen-devel] [PATCH] x86/xen: zero MSR_IA32_SPEC_CTRL before suspend

[Jan Beulich]

>>> On 11.04.18 at 13:53, <mingo@xxxxxxxxxx> wrote:
> * Jan Beulich <JBeulich@xxxxxxxx> wrote:
> 
>> Additionally, x86 maintainers: is there a particular reason this (or
>> any functionally equivalent patch) isn't upstream yet? As indicated
>> before, I had not been able to find any discussion, and hence I
>> see no reason why this is a patch we effectively carry privately in
>> our distro branches (and likely other distros do so too).
> 
> The patch was merged 6 weeks ago and is now upstream:
> 
>   71c208dd54ab: x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend

I'm sorry, but no, this isn't the patch I was inquiring about.
Instead I'm wondering of the disposition of the patch disabling
IBRS around a CPU going idle.

Jan