Fix a variety of bugs in the guest_memfd series, almost all of which are my fault, and add assertions and testcases to detect future regressions. The last patch, renaming guest_mem.c to guest_memfd.c, is obviously not a bug fix, I included it here so that if we want to go with guest_memfd.c, squashing everything will be straightforward. Note, the truncate fix and test conflicts with Isaku's series[*]. My fix is more correct (knock wood), and my test is slightly more comprehensive (though arguably not really all that more interesting). Note #2, this is based on kvm-x86/guest_memfd, to which I force-pushed v12. Note #3, the patches are organized so that they can be squashed with their Fixes, i.e. the splits are more than a bit odd in some places. [*] https://lore.kernel.org/all/cover.1695327124.git.isaku.yamahata@xxxxxxxxx Sean Christopherson (13): KVM: Assert that mmu_invalidate_in_progress *never* goes negative KVM: Actually truncate the inode when doing PUNCH_HOLE for guest_memfd KVM: WARN if *any* MMU invalidation sequence doesn't add a range KVM: WARN if there are danging MMU invalidations at VM destruction KVM: Fix MMU invalidation bookkeeping in guest_memfd KVM: Disallow hugepages for incompatible gmem bindings, but let 'em succeed KVM: x86/mmu: Track PRIVATE impact on hugepage mappings for all memslots KVM: x86/mmu: Zap shared-only memslots when private attribute changes KVM: Always add relevant ranges to invalidation set when changing attributes KVM: x86/mmu: Drop repeated add() of to-be-invalidated range KVM: selftests: Refactor private mem conversions to prep for punch_hole test KVM: selftests: Add a "pure" PUNCH_HOLE on guest_memfd testcase KVM: Rename guest_mem.c to guest_memfd.c arch/x86/kvm/mmu/mmu.c | 25 ++-- .../kvm/x86_64/private_mem_conversions_test.c | 112 ++++++++++++++---- virt/kvm/Makefile.kvm | 2 +- virt/kvm/{guest_mem.c => guest_memfd.c} | 84 +++++++------ virt/kvm/kvm_main.c | 40 +++++-- 5 files changed, 184 insertions(+), 79 deletions(-) rename virt/kvm/{guest_mem.c => guest_memfd.c} (92%) base-commit: 7af66fbd6d89b159acc359895449b5940b6e4fdb -- 2.42.0.515.g380fc7ccd1-goog
