Re: [Qemu-devel] [PATCH v3 0/9] hmp command IO- and Local APIC dump state

[Paolo Bonzini <pbonzini@redhat.com>]

On 21/09/2015 12:57, Denis V. Lunev wrote:
> Added the hmp command to query IO- and Local APIC registers state,
> it can be very useful to identify problems related to the emulation devices.
> 
> (qemu) info lapic
> dumping local APIC state for CPU 0
> 
> LVT0     0x00010700 active-hi edge  masked                      ExtINT (vec 0)
> LVT1     0x00000400 active-hi edge                              NMI
> LVTPC    0x00010000 active-hi edge  masked                      Fixed  (vec 0)
> LVTERR   0x000000fe active-hi edge                              Fixed  (vec 254)
> LVTTHMR  0x00010000 active-hi edge  masked                      Fixed  (vec 0)
> LVTT     0x000000ef active-hi edge                 one-shot     Fixed  (vec 239)
> Timer    DCR=0x3 (divide by 16) initial_count = 62278
> SPIV     0x000001ff APIC enabled, focus=off, spurious vec 255
> ICR      0x000000fd physical edge de-assert no

s/no/no-shorthand/ or similar.

> ICR2     0x00000001 cpu 1 (X2APIC ID)
> ESR      0x00000000
> ISR

Adding a "(none)" here would be nice.

> IRR      239
> 
> APR 0x00 TPR 0x00 DFR 0x0f LDR 0x00 PPR 0x00
> 
> (qemu) info ioapic
> ioapic id=0x00 sel=0x2e (redir[15])
> pin 0  0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 1  0x0000000000000031 dest=0 vec=49  active-hi edge         fixed  physical
> pin 2  0x0000000000000030 dest=0 vec=48  active-hi edge         fixed  physical
> pin 3  0x0000000000000033 dest=0 vec=51  active-hi edge         fixed  physical
> pin 4  0x0000000000010034 dest=0 vec=52  active-hi edge  masked fixed  physical
> pin 5  0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 6  0x0000000000000036 dest=0 vec=54  active-hi edge         fixed  physical
> pin 7  0x0000000000000037 dest=0 vec=55  active-hi edge         fixed  physical
> pin 8  0x0000000000000038 dest=0 vec=56  active-hi edge         fixed  physical
> pin 9  0x0000000000018041 dest=0 vec=65  active-hi level masked fixed  physical
> pin 10 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 11 0x0300000000008081 dest=3 vec=129 active-hi level        fixed  physical
> pin 12 0x000000000000003c dest=0 vec=60  active-hi edge         fixed  physical
> pin 13 0x000000000000003d dest=0 vec=61  active-hi edge         fixed  physical
> pin 14 0x000000000000003e dest=0 vec=62  active-hi edge         fixed  physical
> pin 15 0x000000000000003f dest=0 vec=63  active-hi edge         fixed  physical
> pin 16 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 17 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 18 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 19 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 20 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 21 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 22 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> pin 23 0x0000000000010000 dest=0 vec=0   active-hi edge  masked fixed  physical
> IRR (none)

I would print IRR as a bitmap here, like ISR/IRR in the local APIC dump.
 Similarly, it would be nice to print the "Remote IRR" bits of the
redirection table (printing them as a bitmap with the same format).

> 
> Changes from v1:
>  - implementation of hmp commands moved to the target-i386 part
>  - the cpu_dump_apic_local_state interface moved to the target-i386 part
> 
> Changes from v2:
>  - lapic and ioapic format dump are fixed for more human readable view
> 
> Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> CC: Paolo Bonzini <pbonzini@redhat.com>
> CC: Andreas Färber <afaerber@suse.de>

I would like a second look at the HMP code.

Paolo

> Pavel Butsykin (9):
>   apic_internal.h: make some apic_get_* functions externally visible
>   apic_internal.h: rename ESR_ILLEGAL_ADDRESS to
>     APIC_ESR_ILLEGAL_ADDRESS
>   apic_internal.h: added more constants
>   apic_internal.h: fix formatting and drop unused consts
>   monitor: make monitor_fprintf and mon_get_cpu externally visible
>   hmp: added local apic dump state
>   ioapic_internal.h: added more constants
>   hmp: added io apic dump state
>   hmp: implemented io apic dump state for TCG
> 
>  disas.c                           |  10 --
>  hmp-commands-info.hx              |  32 +++++++
>  hw/i386/kvm/ioapic.c              |  10 ++
>  hw/intc/apic.c                    |  22 +----
>  hw/intc/ioapic.c                  |  12 +++
>  hw/intc/ioapic_common.c           |  37 ++++++++
>  include/hw/i386/apic_internal.h   |  96 ++++++++++++++++---
>  include/hw/i386/ioapic_internal.h |   7 ++
>  include/hw/i386/pc.h              |   5 +
>  include/monitor/hmp-target.h      |   3 +
>  include/monitor/monitor.h         |   1 +
>  monitor.c                         |   5 +-
>  target-i386/cpu.h                 |   3 +
>  target-i386/helper.c              | 190 ++++++++++++++++++++++++++++++++++++++
>  target-i386/monitor.c             |  17 ++++
>  15 files changed, 407 insertions(+), 43 deletions(-)
>