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hw/pci/pci_host: Trace config accesses on unexisting functions 

Currently we only emit trace events for existing PCI functions.
In order to ease debugging PCI enumeration process, also emit
for unexisting functions:

  $ qemu-system-foo -trace pci_cfg_\*
  ...
  pci_cfg_read empty 00:0a.4 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0a.5 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0a.6 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0a.7 @0x0 -> 0xffffffff
  pci_cfg_read pcnet 00:0b.0 @0x0 -> 0x20001022
  pci_cfg_read empty 00:0c.0 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0d.0 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0e.0 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:0f.0 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:10.0 @0x0 -> 0xffffffff
  pci_cfg_read empty 00:11.0 @0x0 -> 0xffffffff
  pci_cfg_read cirrus-vga 00:12.0 @0x0 -> 0xb81013

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230104133935.4639-2-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2023-01-04 12:13:00 +01:00
parent f995037430
commit 1bdad09bf3
1 changed files with 6 additions and 0 deletions
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6
hw/pci/pci_host.c
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@ -118,6 +118,9 @@ void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, unsigned len)
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
if (!pci_dev) {
trace_pci_cfg_write("empty", extract32(addr, 16, 8),
extract32(addr, 11, 5), extract32(addr, 8, 3),
config_addr, val);
return;
}
@ -131,6 +134,9 @@ uint32_t pci_data_read(PCIBus *s, uint32_t addr, unsigned len)
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
if (!pci_dev) {
trace_pci_cfg_read("empty", extract32(addr, 16, 8),
extract32(addr, 11, 5), extract32(addr, 8, 3),
config_addr, ~0x0);
return ~0x0;
}