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* kvm-arm64/debug-6.14: : . : Large rework of the debug code to make it a bit less horrid, : courtesy of Oliver Upton. From the original cover letter: : : "The debug code has become a bit difficult to reason about, especially : all the hacks and bandaids for state tracking + trap configuration. : : This series reworks the entire mess around using a single enumeration to : track the state of the debug registers (free, guest-owned, host-owned), : using that to drive trap configuration and save/restore. : : On top of that, this series wires most of the implementation into vCPU : load/put rather than the main KVM_RUN loop. This has been a long time : coming for VHE, as a lot of the trap configuration and EL1 state gets : loaded into hardware at that point anyway. : : The save/restore of the debug registers is simplified quite a bit as : well. KVM will now restore the registers for *any* access rather than : just writes, and keep doing so until the next vcpu_put() instead of : dropping it on the floor after the next exception." : . KVM: arm64: Promote guest ownership for DBGxVR/DBGxCR reads KVM: arm64: Fold DBGxVR/DBGxCR accessors into common set KVM: arm64: Avoid reading ID_AA64DFR0_EL1 for debug save/restore KVM: arm64: nv: Honor MDCR_EL2.TDE routing for debug exceptions KVM: arm64: Manage software step state at load/put KVM: arm64: Don't hijack guest context MDSCR_EL1 KVM: arm64: Compute MDCR_EL2 at vcpu_load() KVM: arm64: Reload vCPU for accesses to OSLAR_EL1 KVM: arm64: Use debug_owner to track if debug regs need save/restore KVM: arm64: Remove vestiges of debug_ptr KVM: arm64: Remove debug tracepoints KVM: arm64: Select debug state to save/restore based on debug owner KVM: arm64: Clean up KVM_SET_GUEST_DEBUG handler KVM: arm64: Evaluate debug owner at vcpu_load() KVM: arm64: Write MDCR_EL2 directly from kvm_arm_setup_mdcr_el2() KVM: arm64: Move host SME/SVE tracking flags to host data KVM: arm64: Track presence of SPE/TRBE in kvm_host_data instead of vCPU KVM: arm64: Get rid of __kvm_get_mdcr_el2() and related warts KVM: arm64: Drop MDSCR_EL1_DEBUG_MASK 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 reStructuredText 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.