reserve_iova(9)

💅 reserve_iova(9) 💅

okay so this page is from the Kernel API Manual, and we're talking about reserve_iova, the function that reserves an iova in the given range. lowkey iconic that this exists, and yes bestie, we're getting into it. 🦋

✨ NAME ✨

reserve_iova — reserves an iova in the given range. no cap, that's the whole vibe. 💖

🌸 SYNOPSIS 🌸

struct iova * reserve_iova (struct iova_domain *iovad , unsigned long pfn_lo , unsigned long pfn_hi );

🎀 ARGUMENTS 🎀

• iovad — iova domain pointer. it's giving "here's the domain bestie in question." 💅
• pfn_lo — lower page frame address. the bottom edge of the range, fr fr. ⬇️
• pfn_hi — higher pfn address. the top edge. ⬆️ also, this function allocates reserves the address range from pfn_lo to pfn_hi so that this address is not dished out as part of alloc_iova. periodt. 🔥

🔥 SEE ALSO 🔥

• Kernel file ./drivers/iommu/iova.c
• alloc_iova(9)
• find_iova(9)
• __free_iova(9)
• free_iova(9)
• alloc_iova_fast(9)
• free_iova_fast(9)
• put_iova_domain(9)

xoxo bestie 🫶 — source/version: ./drivers/iommu, date: October 2026. mwah 💋