Re: [Xen-devel] [PATCH] VT-d: return full destination ID for IO-APIC reads

2019-04-02 Thread Tian, Kevin
> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Tuesday, April 2, 2019 8:57 PM > > In x2APIC mode it is 32 bits wide. Not having returned the full value > was mostly benign: We never modify the ID based on its original value; > full new values get written at all times. It was "just" debug

Re: [Xen-devel] [PATCH] VT-d: return full destination ID for IO-APIC reads

2019-04-02 Thread Andrew Cooper
On 02/04/2019 13:56, Jan Beulich wrote: > In x2APIC mode it is 32 bits wide. Not having returned the full value > was mostly benign: We never modify the ID based on its original value; > full new values get written at all times. It was "just" debug logging > which ended up wrong this way (and

[Xen-devel] [PATCH] VT-d: return full destination ID for IO-APIC reads

2019-04-02 Thread Jan Beulich
In x2APIC mode it is 32 bits wide. Not having returned the full value was mostly benign: We never modify the ID based on its original value; full new values get written at all times. It was "just" debug logging which ended up wrong this way (and which will need adjustment itself as well, to also