kernel/arch/arm64/kvm/vgic/vgic-debug.c, branch linux-6.2.y

KVM: arm64: Use config_lock to protect vgic state

2023-05-11T14:10:53Z

commit f00327731131d1b5aa6a1aa9f50bcf8d620ace4c upstream. Almost all of the vgic state is VM-scoped but accessed from the context of a vCPU. These accesses were serialized on the kvm->lock which cannot be nested within a vcpu->mutex critical section. Move over the vgic state to using the config_lock. Tweak the lock ordering where necessary to ensure that the config_lock is acquired after the vcpu->mutex. Acquire the config_lock in kvm_vgic_create() to avoid a race between the converted flows and GIC creation. Where necessary, continue to acquire kvm->lock to avoid a race with vCPU creation (i.e. flows that use lock_all_vcpus()). Finally, promote the locking expectations in comments to lockdep assertions and update the locking documentation for the config_lock as well as vcpu->mutex. Cc: stable@vger.kernel.org Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230327164747.2466958-5-oliver.upton@linux.dev Signed-off-by: Greg Kroah-Hartman

KVM: arm64: vgic: Remove unnecessary type castings

2022-04-06T09:42:55Z

Remove unnecessary casts. Signed-off-by: Yu Zhe Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220329102059.268983-1-yuzhe@nfschina.com

KVM: arm64: vgic-debug: Convert to use DEFINE_SEQ_ATTRIBUTE macro

2020-09-18T15:17:27Z

Use DEFINE_SEQ_ATTRIBUTE macro to simplify the code. Signed-off-by: Liu Shixin Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200916025023.3992679-1-liushixin2@huawei.com

KVM: arm64: Move virt/kvm/arm to arch/arm64

2020-05-16T14:03:59Z

Now that the 32bit KVM/arm host is a distant memory, let's move the whole of the KVM/arm64 code into the arm64 tree. As they said in the song: Welcome Home (Sanitarium). Signed-off-by: Marc Zyngier Acked-by: Will Deacon Link: https://lore.kernel.org/r/20200513104034.74741-1-maz@kernel.org