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pci: Make query-pci stub consistent with the real one 

QMP query-pci and HMP info pci can behave differently when there are
no PCI devices.  They can report nothing, like this:

    qemu-system-aarch64 -S -M spitz -display none -monitor stdio
    QEMU 7.1.91 monitor - type 'help' for more information
    (qemu) info pci

Or they can fail, like this:

    qemu-system-microblaze -M petalogix-s3adsp1800 -display none -monitor stdio
    QEMU 7.1.91 monitor - type 'help' for more information
    (qemu) info pci
    PCI devices not supported

They fail when none of the target's machines supports PCI, i.e. when
we're using qmp_query_pci() from hw/pci/pci-stub.c.

The error is not useful, and reporting nothing makes sense, so do that
in pci-stub.c, too.

Now qmp_query_pci() can't fail anymore.  Drop the dead error handling
from hmp_info_pci().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20221201121133.3813857-5-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2022-12-01 13:11:24 +01:00
parent 5ef4a0cb63
commit 6be4ddffd0
2 changed files with 1 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hw/pci/pci-hmp-cmds.c
View File

@ -105,14 +105,8 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
void hmp_info_pci(Monitor *mon, const QDict *qdict)
{
PciInfoList *info_list, *info;
Error *err = NULL;
info_list = qmp_query_pci(&err);
if (err) {
monitor_printf(mon, "PCI devices not supported\n");
error_free(err);
return;
}
info_list = qmp_query_pci(&error_abort);
for (info = info_list; info; info = info->next) {
PciDeviceInfoList *dev;

3
hw/pci/pci-stub.c
View File

@ -21,9 +21,7 @@
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "monitor/monitor.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-pci.h"
#include "qapi/qmp/qerror.h"
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
@ -33,7 +31,6 @@ bool pci_available;
PciInfoList *qmp_query_pci(Error **errp)
{
error_setg(errp, QERR_UNSUPPORTED);
return NULL;
}