diff options
| author | CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com> | 2025-05-20 07:18:51 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-06-01 06:38:53 -0400 |
| commit | 1e82e8a828cf18a8abfeca7295322db91879de04 (patch) | |
| tree | 98a8d60a0bea679ffaff2ef02b7415bddcc6e26b | |
| parent | a8d178e1492a1a803898501a84829ac517ae2fb0 (diff) | |
| download | qemu-1e82e8a828cf18a8abfeca7295322db91879de04.zip qemu-1e82e8a828cf18a8abfeca7295322db91879de04.tar.gz qemu-1e82e8a828cf18a8abfeca7295322db91879de04.tar.bz2 | |
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 <clement.mathieu--drif@eviden.com>
Message-Id: <20250520071823.764266-3-clement.mathieu--drif@eviden.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/pci/pcie.c | 9 | ||||
| -rw-r--r-- | include/hw/pci/pcie.h | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 4f935ff..db9756d 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 fe82e0a..dff98ff 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 */ |