linux/virt/kvm
Sean Christopherson d497a0fab8 KVM: WARN if there are dangling MMU invalidations at VM destruction
Add an assertion that there are no in-progress MMU invalidations when a
VM is being destroyed, with the exception of the scenario where KVM
unregisters its MMU notifier between an .invalidate_range_start() call and
the corresponding .invalidate_range_end().

KVM can't detect unpaired calls from the mmu_notifier due to the above
exception waiver, but the assertion can detect KVM bugs, e.g. such as the
bug that *almost* escaped initial guest_memfd development.

Link: https://lore.kernel.org/all/e397d30c-c6af-e68f-d18e-b4e3739c5389@linux.intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Message-Id: <20231027182217.3615211-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-11-13 05:29:08 -05:00
..
async_pf.c mm/gup: remove vmas parameter from get_user_pages_remote() 2023-06-09 16:25:26 -07:00
async_pf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 2019-06-19 17:09:56 +02:00
binary_stats.c KVM: stats: remove dead stores 2021-08-13 03:35:15 -04:00
coalesced_mmio.c KVM: destruct kvm_io_device while unregistering it from kvm_io_bus 2023-06-13 14:18:09 -07:00
coalesced_mmio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dirty_ring.c KVM: Support dirty ring in conjunction with bitmap 2022-11-10 13:11:58 +00:00
eventfd.c kvm/eventfd: use list_for_each_entry when deassign ioeventfd 2023-06-13 14:25:39 -07:00
irqchip.c KVM: replace direct irq.h inclusion 2022-11-09 12:31:37 -05:00
Kconfig KVM: Remove CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL 2023-08-17 09:35:14 +01:00
kvm_main.c KVM: WARN if there are dangling MMU invalidations at VM destruction 2023-11-13 05:29:08 -05:00
kvm_mm.h kvm: Remove the unused macro KVM_MMU_READ_{,UN}LOCK() 2022-12-27 06:00:51 -05:00
Makefile.kvm KVM: Reinstate gfn_to_pfn_cache with invalidation support 2022-01-07 10:44:44 -05:00
pfncache.c KVM: Skip unnecessary "unmap" if gpc is already valid during refresh 2022-11-30 19:25:24 +00:00
vfio.c kvm/vfio: avoid bouncing the mutex when adding and deleting groups 2023-08-03 12:01:56 -06:00
vfio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00