[PATCH 4/4] pcie: add trace-poing for power indicator transitions

[Vladimir Sementsov-Ogievskiy]

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
 hw/pci/pcie.c       | 20 ++++++++++++++++++++
 hw/pci/trace-events |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index ccdb2377e1..1a19368994 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -28,6 +28,7 @@
 #include "hw/pci/pcie_regs.h"
 #include "hw/pci/pcie_port.h"
 #include "qemu/range.h"
+#include "trace.h"
 
 //#define DEBUG_PCIE
 #ifdef DEBUG_PCIE
@@ -718,6 +719,20 @@ void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slt_ctl, 
uint16_t *slt_sta)
     *slt_sta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
 }
 
+static const char *pcie_sltctl_pic_str(uint16_t sltctl)
+{
+    switch (sltctl & PCI_EXP_SLTCTL_PIC) {
+    case PCI_EXP_SLTCTL_PWR_IND_ON:
+        return "on";
+    case PCI_EXP_SLTCTL_PWR_IND_BLINK:
+        return "blink";
+    case PCI_EXP_SLTCTL_PWR_IND_OFF:
+        return "off";
+    default:
+        return "?";
+    }
+}
+
 void pcie_cap_slot_write_config(PCIDevice *dev,
                                 uint16_t old_slt_ctl, uint16_t old_slt_sta,
                                 uint32_t addr, uint32_t val, int len)
@@ -762,6 +777,11 @@ void pcie_cap_slot_write_config(PCIDevice *dev,
                         sltsta);
     }
 
+    if ((val & PCI_EXP_SLTCTL_PIC) != (old_slt_ctl & PCI_EXP_SLTCTL_PIC)) {
+        trace_pcie_power_indicator(pcie_sltctl_pic_str(old_slt_ctl),
+                                   pcie_sltctl_pic_str(val));
+    }
+
     /*
      * If the slot is populated, power indicator is off and power
      * controller is off, it is safe to detach the devices.
diff --git a/hw/pci/trace-events b/hw/pci/trace-events
index aaf46bc92d..ec4a5ff43d 100644
--- a/hw/pci/trace-events
+++ b/hw/pci/trace-events
@@ -15,3 +15,6 @@ msix_write_config(char *name, bool enabled, bool masked) "dev 
%s enabled %d mask
 sriov_register_vfs(const char *name, int slot, int function, int num_vfs) "%s 
%02x:%x: creating %d vf devs"
 sriov_unregister_vfs(const char *name, int slot, int function, int num_vfs) 
"%s %02x:%x: Unregistering %d vf devs"
 sriov_config_write(const char *name, int slot, int fun, uint32_t offset, 
uint32_t val, uint32_t len) "%s %02x:%x: sriov offset 0x%x val 0x%x len %d"
+
+# pcie.c
+pcie_power_indicator(const char *old, const char *new) "%s -> %s"
-- 
2.34.1