From: CLEMENT MATHIEU--DRIF <clement.mathieu--d...@eviden.com>
pasid_enabled checks whether the capability is
present or not. If so, we read the configuration space to get
the status of the feature (enabled or not).
Signed-off-by: Clement Mathieu--Drif <clement.mathieu--d...@eviden.com>
Message-Id: <20250520071823.764266-3-clement.mathieu--d...@eviden.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/hw/pci/pcie.h | 2 ++
hw/pci/pcie.c | 9 +++++++++
2 files changed, 11 insertions(+)
diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h
index fe82e0a915..dff98ff2c6 100644
--- a/include/hw/pci/pcie.h
+++ b/include/hw/pci/pcie.h
@@ -154,4 +154,6 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler
*hotplug_dev,
void pcie_pasid_init(PCIDevice *dev, uint16_t offset, uint8_t pasid_width,
bool exec_perm, bool priv_mod);
+
+bool pcie_pasid_enabled(const PCIDevice *dev);
#endif /* QEMU_PCIE_H */
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index 4f935ff420..db9756d861 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -1239,3 +1239,12 @@ void pcie_pasid_init(PCIDevice *dev, uint16_t offset,
uint8_t pasid_width,
dev->exp.pasid_cap = offset;
}
+
+bool pcie_pasid_enabled(const PCIDevice *dev)
+{
+ if (!pci_is_express(dev) || !dev->exp.pasid_cap) {
+ return false;
+ }
+ return (pci_get_word(dev->config + dev->exp.pasid_cap + PCI_PASID_CTRL) &
+ PCI_PASID_CTRL_ENABLE) != 0;
+}
--
MST
