check_gva_range(9)

✨ check_gva_range(9) ✨

okay so bestie, welcome to the Kernel API Manual (section 9, the fancy kernel-functions one 💅) — today's main character is check_gva_range, and honestly? She does exactly one thing and she does it slay.

🎀 NAME 🎀

check_gva_range — test a range of guest virtual addresses for accessibility 🦋

like. she's the vibe check for memory ranges. no cap.

✨ SYNOPSIS ✨

int check_gva_range (struct kvm_vcpu *vcpu , unsigned long gva , u8 ar ,
       unsigned long length , enum gacc_mode mode , u8 access_key );

look at her. six arguments. iconic. 💖

🌸 ARGUMENTS 🌸

• vcpu — the virtual cpu 🧚 (her little home base)
• gva — Guest virtual address, aka where the range starts
• ar — Access register
• length — Length of test range (yes, the whole stretch you're checking, not just one address)
• mode — Translation access mode
• access_key — access key to mach the storage keys with 🔑

ok tiny heads-up: "mach" is literally how the original spells it — I'm not fixing it, I'm just delivering the facts with love 🙈

🔥 SEE ALSO 🔥

bestie you are gonna want the whole group chat, because these functions are all in the same friend group:

• Kernel file ./arch/s390/kvm/s390/gaccess.c — the actual hangout spot 🏠
• guest_translate_gva(9)
• guest_range_to_gpas(9)
• __cmpxchg_with_key(9)
• cmpxchg_guest_abs_with_key(9)
• guest_translate_address_with_key(9)
• check_gpa_range(9)
• kvm_s390_check_low_addr_prot_real(9)
• walk_guest_tables(9)
• __gaccess_shadow_fault(9)

go read them all. iykyk. 👑

that's the whole page, periodt 💅 shoutout to ./arch/s390/kvm/s390 for being the source, October 2026 for the date stamp, and the kernel API manual for letting her be in her section 9 era 🫶 ⭐ 🌈