Re: [Qemu-devel] [PULL 7/7] hw/pci: fix pci_update_mappings() trace events

[Laszlo Ersek <lersek@redhat.com>]

Hi,

On 09/10/15 11:27, Michael S. Tsirkin wrote:
> From: Laszlo Ersek <lersek@redhat.com>
> 
> The current trace prototypes and (matching) trace calls lead to
> "unorthodox" PCI BDF notation in at least the stderr trace backend. For
> example, the four BARs of a QXL video card at 00:01.0 (bus 0, slot 1,
> function 0) are traced like this (PID and timestamps removed):
> 
>   pci_update_mappings_add d=0x7f14a73bf890 00:00.1 0,0x84000000+0x4000000
>   pci_update_mappings_add d=0x7f14a73bf890 00:00.1 1,0x80000000+0x4000000
>   pci_update_mappings_add d=0x7f14a73bf890 00:00.1 2,0x88200000+0x2000
>   pci_update_mappings_add d=0x7f14a73bf890 00:00.1 3,0xd060+0x20
> 
> The slot and function values are in reverse order.
> 
> Stick with the conventional BDF notation.
> 
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Don Koch <dkoch@verizon.com>
> Cc: qemu-trivial@nongnu.org
> Fixes: 7828d75045
> Signed-off-by: Laszlo Ersek <lersek@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

can you please add Marcel's R-b too? From
<http://thread.gmane.org/gmane.comp.emulators.qemu/358561/focus=358673>.

Also, the patch has been picked up by Michael Tokarev for qemu-trivial,
<http://thread.gmane.org/gmane.comp.emulators.qemu/358561/focus=358673>.
I apologize for the confusion, but I really couldn't figure out myself
if this should go "only" to trivial, or to PCI "only". I guess the patch
could be dropped from exactly one of the two queues, but I also expect
that whenever the chronologically second one is going to be merged, git
will simply realize that the patch is already present.

So, my point is that please add *both* R-b tags, regardless of which
tree this is going to be pulled from first.

Also: any guidance for the next time I have a trivial patch for PCI?
Should I Cc qemu-trivial, or not?

Thanks!
Laszlo


> ---
>  hw/pci/pci.c | 4 ++--
>  trace-events | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index eba7ca2..ccea628 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -1154,16 +1154,16 @@ static void pci_update_mappings(PCIDevice *d)
>          /* now do the real mapping */
>          if (r->addr != PCI_BAR_UNMAPPED) {
>              trace_pci_update_mappings_del(d, pci_bus_num(d->bus),
> -                                          PCI_FUNC(d->devfn),
>                                            PCI_SLOT(d->devfn),
> +                                          PCI_FUNC(d->devfn),
>                                            i, r->addr, r->size);
>              memory_region_del_subregion(r->address_space, r->memory);
>          }
>          r->addr = new_addr;
>          if (r->addr != PCI_BAR_UNMAPPED) {
>              trace_pci_update_mappings_add(d, pci_bus_num(d->bus),
> -                                          PCI_FUNC(d->devfn),
>                                            PCI_SLOT(d->devfn),
> +                                          PCI_FUNC(d->devfn),
>                                            i, r->addr, r->size);
>              memory_region_add_subregion_overlap(r->address_space,
>                                                  r->addr, r->memory, 1);
> diff --git a/trace-events b/trace-events
> index 0a82f0c..1684a95 100644
> --- a/trace-events
> +++ b/trace-events
> @@ -1303,8 +1303,8 @@ spapr_pci_lsi_set(const char *busname, int pin, uint32_t irq) "%s PIN%d IRQ %u"
>  spapr_pci_msi_retry(unsigned config_addr, unsigned req_num, unsigned max_irqs) "Guest device at %x asked %u, have only %u"
>  
>  # hw/pci/pci.c
> -pci_update_mappings_del(void *d, uint32_t bus, uint32_t func, uint32_t slot, int bar, uint64_t addr, uint64_t size) "d=%p %02x:%02x.%x %d,%#"PRIx64"+%#"PRIx64
> -pci_update_mappings_add(void *d, uint32_t bus, uint32_t func, uint32_t slot, int bar, uint64_t addr, uint64_t size) "d=%p %02x:%02x.%x %d,%#"PRIx64"+%#"PRIx64
> +pci_update_mappings_del(void *d, uint32_t bus, uint32_t slot, uint32_t func, int bar, uint64_t addr, uint64_t size) "d=%p %02x:%02x.%x %d,%#"PRIx64"+%#"PRIx64
> +pci_update_mappings_add(void *d, uint32_t bus, uint32_t slot, uint32_t func, int bar, uint64_t addr, uint64_t size) "d=%p %02x:%02x.%x %d,%#"PRIx64"+%#"PRIx64
>  
>  # hw/net/pcnet.c
>  pcnet_s_reset(void *s) "s=%p"
>