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* kvm-arm64/lock-inversion: : . : vm/vcpu lock inversion fixes, courtesy of Oliver Upton, plus a few : extra fixes from both Oliver and Reiji Watanabe. : : From the initial cover letter: : : As it so happens, lock ordering in KVM/arm64 is completely backwards. : There's a significant amount of VM-wide state that needs to be accessed : from the context of a vCPU. Until now, this was accomplished by : acquiring the kvm->lock, but that cannot be nested within vcpu->mutex. : : This series fixes the issue with some fine-grained locking for MP state : and a new, dedicated mutex that can nest with both kvm->lock and : vcpu->mutex. : . KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init() KVM: arm64: vgic: Don't acquire its_lock before config_lock KVM: arm64: Use config_lock to protect vgic state KVM: arm64: Use config_lock to protect data ordered against KVM_RUN KVM: arm64: Avoid lock inversion when setting the VM register width KVM: arm64: Avoid vcpu->mutex v. kvm->lock inversion in CPU_ON Signed-off-by: Marc Zyngier <maz@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.