linux/virt/kvm
David Woodhouse 42a90008f8 KVM: Ensure lockdep knows about kvm->lock vs. vcpu->mutex ordering rule
Documentation/virt/kvm/locking.rst tells us that kvm->lock is taken outside
vcpu->mutex. But that doesn't actually happen very often; it's only in
some esoteric cases like migration with AMD SEV. This means that lockdep
usually doesn't notice, and doesn't do its job of keeping us honest.

Ensure that lockdep *always* knows about the ordering of these two locks,
by briefly taking vcpu->mutex in kvm_vm_ioctl_create_vcpu() while kvm->lock
is held.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20230111180651.14394-3-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-01-11 13:32:21 -05:00
..
async_pf.c KVM: Add helpers to wake/query blocking vCPU 2021-12-08 04:24:54 -05:00
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: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio 2021-07-14 12:17:56 -04:00
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: Fix false positive RCU usage warning 2022-05-20 09:10:33 -04:00
irqchip.c KVM: replace direct irq.h inclusion 2022-11-09 12:31:37 -05:00
Kconfig KVM: Support dirty ring in conjunction with bitmap 2022-11-10 13:11:58 +00:00
kvm_main.c KVM: Ensure lockdep knows about kvm->lock vs. vcpu->mutex ordering rule 2023-01-11 13:32:21 -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 vfio: Hold a reference to the iommu_group in kvm for SPAPR 2022-10-07 08:10:52 -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