pci_pasid_features(9)

💅 pci_pasid_features(9) — the vibe check for PASID features

okay bestie, welcome to the Kernel API Manual, section 9, where we're talking about pci_pasid_features. She's a little function, she's iconic, and she tells you which PASID features your device actually supports. No cap. 🦋

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✨ SYNOPSIS ✨

int pci_pasid_features (struct pci_dev *pdev );

literally that's it. one function, one argument, zero drama.

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🌸 ARGUMENTS 🌸

• pdev — the PCI device structure. that's your device, your main character. 🫶

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🎀 DESCRIPTION 🎀

so here's the tea, bestie. call pci_pasid_features and one of two things happens:

• if there's no PASID capability present at all, you get back a negative value. it's giving "not today". 😭
• otherwise, you get a bitmask of the supported features. slay. 🔥

the features currently reported in that bitmask are:

• PCI_PASID_CAP_EXEC — Execute permission is supported 💅
• PCI_PASID_CAP_PRIV — Privileged mode is supported 👑

that's the whole menu. check your bits, know your vibe. ⭐

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👀 SEE ALSO 👀

the kernel file ./drivers/pci/ats.c (iykyk), plus the whole friend group of related calls:

• pci_ats_supported(9)
• pci_prepare_ats(9)
• pci_enable_ats(9)
• pci_disable_ats(9)
• pci_ats_queue_depth(9)
• pci_ats_page_aligned(9)
• pci_ats_required(9)
• pci_enable_pri(9)
• pci_disable_pri(9)
• pci_restore_pri_state(9)
• pci_reset_pri(9)
• pci_prg_resp_pasid_required(9)
• pci_pri_supported(9)
• pci_enable_pasid(9)
• pci_disable_pasid(9)
• pci_restore_pasid_state(9)
• pci_max_pasids(9)
• pci_pasid_status(9)

go read them all, bestie, they're all part of the same era. 🌈

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ngl this one's a short read, so go touch some grass and then come back and check your bitmask 💖

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and that's a wrap! this page lives in ./drivers/pci, dated October 2026, and she's officially pci_pasid_features(9). periodt. 👑🎀🦋