Re: [Qemu-devel] [PATCH v2] hmp: allow cpu index for "info lapic"

[<wang.yi59@zte.com.cn>]

>* wang.yi59@zte.com.cn (wang.yi59@zte.com.cn) wrote:


>> Hi Eduardo,

>> 

>> Thank you for your reply!

>> 

>> >On Mon, Jul 17, 2017 at 09:49:37PM -0400, Yi Wang wrote:

>> 

>> >> Add [vcpu] index support for hmp command "info lapic", which is

>> 

>> >> useful when debugging ipi and so on. Current behavior is not

>> 

>> >> changed when the parameter isn't specified.

>> 

>> >> 

>> 

>> >> Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>

>> 

>> >> Signed-off-by: Yun Liu <liu.yunh@zte.com.cn>

>> 

>> >

>> 

>> >We have 8 monitor commands (see below) that use the CPU set by

>> >the "cpu" command (mon_get_cpu()) as input.  Why is "info lapic"

>> >special?

>> 

>> When we debugging a problem of ipi, we wanted to verify lapic info

>> on each vCPU, but we found that we could only get vCPU 0's lapic

>> through "info lapic", so we supposed this patch could help those

>> who have the same problem as us.

>

>I think Eduardo's point is that you can already do:

>    cpu 0

>    info lapic

>    cpu 1

>    info lapic

Yes, I get it, thank you.

The reason of the problem we met is that we use "virsh qemu-monitor-command",

so the 'cpu' command didn't work.








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Best wishes

Yi Wang