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| author | CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com> | 2025-05-20 07:18:52 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-06-01 06:38:53 -0400 |
| commit | 6a3ae6a2440dead9dd8e3f84152dc53a5214c48d (patch) | |
| tree | 208d3ac054d92825b50e70cdfd778f0c446720c7 | |
| parent | 1e82e8a828cf18a8abfeca7295322db91879de04 (diff) | |
| download | qemu-6a3ae6a2440dead9dd8e3f84152dc53a5214c48d.zip qemu-6a3ae6a2440dead9dd8e3f84152dc53a5214c48d.tar.gz qemu-6a3ae6a2440dead9dd8e3f84152dc53a5214c48d.tar.bz2 | |
pcie: Helper function to check if ATS is enabled
ats_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: <20250520071823.764266-4-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 | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index db9756d..36de709 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -1248,3 +1248,12 @@ bool pcie_pasid_enabled(const PCIDevice *dev) return (pci_get_word(dev->config + dev->exp.pasid_cap + PCI_PASID_CTRL) & PCI_PASID_CTRL_ENABLE) != 0; } + +bool pcie_ats_enabled(const PCIDevice *dev) +{ + if (!pci_is_express(dev) || !dev->exp.ats_cap) { + return false; + } + return (pci_get_word(dev->config + dev->exp.ats_cap + PCI_ATS_CTRL) & + PCI_ATS_CTRL_ENABLE) != 0; +} diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h index dff98ff..497d0bc 100644 --- a/include/hw/pci/pcie.h +++ b/include/hw/pci/pcie.h @@ -156,4 +156,5 @@ 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); +bool pcie_ats_enabled(const PCIDevice *dev); #endif /* QEMU_PCIE_H */ |