svm_range_split_adjust(9)

💫 svm_range_split_adjust(9) 💫

okay so bestie, this is a page straight out of the Kernel API Manual — section 9, kernel API vibes only — and it's all about svm_range_split_adjust. it's giving "niche GPU driver helper that absolutely slays". let's get into it 🎀

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🌸 NAME 🌸

svm_range_split_adjust — split range and adjust. that's literally the whole thing. short, sweet, iconic.

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✨ SYNOPSIS ✨

int svm_range_split_adjust (struct svm_range *new , struct svm_range
*old , uint64_t start , uint64_t last );

four args, one int coming back at you. no cap. 🫶

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🦋 ARGUMENTS 🦋

• new — the new range. fresh out of the box, main character energy.
• old — the old range. the og. respect it.
• start — the old range adjust to start address in pages.
• last — the old range adjust to last address in pages.

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💅 DESCRIPTION 💅

so here's the tea: this function copies system memory dma_addr or vram ttm_res in the old range over to the new range, starting from new_start up to size new->npages. the remaining old range is from start to last. lowkey surgical. literally splitting and adjusting at the same time, which is kind of a flex ngl 💖

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🔥 RETURN 🔥

• 0 — OK, we ate. ✨
• -ENOMEM — out of memory 😭

fr fr, that's the whole return contract. two outcomes. no in-between.

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👑 SEE ALSO 👑

bestie these are the sibling functions, and yes you should read them too:

• Kernel file ./drivers/gpu/drm/amd/amdkfd/kfd_svm.c
• svm_range_unlink(9)
• svm_range_add_to_svms(9)
• svm_range_debug_dump(9)
• svm_range_split(9)
• svm_range_list_lock_and_flush_work(9)
• svm_range_evict(9)
• svm_range_add(9)
• svm_range_cpu_invalidate_pagetables(9)
• svm_range_from_addr(9)
• svm_range_check_vm(9)
• svm_range_is_valid(9)
• svm_range_best_prefetch_location(9)

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and that's the page! 💜 brought to you by the fine folks at ./drivers/gpu/drm/amd/amdkfd, October 2026 edition — svm_range_split_adjust(9), periodt. 🧚⭐