From: CLEMENT MATHIEU--DRIF Date: Tue, 20 May 2025 07:18:51 +0000 (+0000) Subject: pcie: Helper functions to check if PASID is enabled X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1e82e8a828cf18a8abfeca7295322db91879de04;p=thirdparty%2Fqemu.git pcie: Helper functions to check if PASID is enabled 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 Message-Id: <20250520071823.764266-3-clement.mathieu--drif@eviden.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- 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; +} 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 */