STRUCT IOMMU_VIOMMU_INVALIDATE_SELFTEST(9)

🌸 NAME

struct iommu_viommu_invalidate_selftest — the invalidation data for the Mock VIOMMU, a.k.a. IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST 💅 and yes bestie that whole long name is the vibe, we're not shortening it

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✨ SYNOPSIS

okay so here's the struct, look at her 👑

struct iommu_viommu_invalidate_selftest {
  #define IOMMU_TEST_INVALIDATE_FLAG_ALL (1 << 0);
    __u32 flags;
    __u32 vdev_id;
    __u32 cache_id;
 };

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🎀 Members

• flags — the invalidate flags 🚩 like what kind of invalidation we're doing here
• cache_id — the invalidate cache entry index 🔢 the lil number of the entry you're targeting

also vdev_id is right there in the struct, sitting between them, being mysterious 🫶 not gonna make up a backstory for it, it's just in there, read the struct

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💖 DESCRIPTION

so listen — if IOMMU_TEST_INVALIDATE_ALL is set in flags, then cache_id will be ignored 💀 literally not even looked at. setting it is giving "talking but nobody's listening" energy. periodt.

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🦋 SEE ALSO

• Kernel file ./drivers/iommu/iommufd/iommufd_test.h
• struct iommu_hwpt_selftest(9)
• struct iommu_hwpt_invalidate_selftest(9)
• struct iommu_viommu_selftest(9)

go read them, they're iconic too, iykyk 🌈

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alright bestie that's the whole page, ily, go touch grass but like after you check the source 🌱 the source is ./drivers/iommu/iommufd, this dropped in October 2026, and it's part of the Kernel API Manual — mwah, mwah, and one more mwah for luck 🧚💜