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* kvm-arm64/el2-feature-control: (23 commits) : . : General rework of EL2 features that can be disabled to satisfy : the requirement of migration between heterogeneous hosts: : : - Handle effective RES0 behaviour of undefined registers, making sure : that disabling a feature affects full registeres, and not just : individual control bits. (20250918151402.1665315-1-maz@kernel.org) : : - Allow ID_AA64MMFR1_EL1.{TWED,HCX} to be disabled from userspace. : (20250911114621.3724469-1-yangjinqian1@huawei.com) : : - Turn the NV feature management into a deny-list, and expose : missing features to EL2 guests. : (20250912212258.407350-1-oliver.upton@linux.dev) : . KVM: arm64: nv: Expose up to FEAT_Debugv8p8 to NV-enabled VMs KVM: arm64: nv: Advertise FEAT_TIDCP1 to NV-enabled VMs KVM: arm64: nv: Advertise FEAT_SpecSEI to NV-enabled VMs KVM: arm64: nv: Expose FEAT_TWED to NV-enabled VMs KVM: arm64: nv: Exclude guest's TWED configuration when TWE isn't set KVM: arm64: nv: Expose FEAT_AFP to NV-enabled VMs KVM: arm64: nv: Expose FEAT_ECBHB to NV-enabled VMs KVM: arm64: nv: Expose FEAT_RASv1p1 via RAS_frac KVM: arm64: nv: Expose FEAT_DF2 to NV-enabled VMs KVM: arm64: nv: Don't erroneously claim FEAT_DoubleLock for NV VMs KVM: arm64: nv: Convert masks to denylists in limit_nv_id_reg() KVM: arm64: selftests: Test writes to ID_AA64MMFR1_EL1.{HCX, TWED} KVM: arm64: Make ID_AA64MMFR1_EL1.{HCX, TWED} writable from userspace KVM: arm64: Convert MDCR_EL2 RES0 handling to compute_reg_res0_bits() KVM: arm64: Convert SCTLR_EL1 RES0 handling to compute_reg_res0_bits() KVM: arm64: Enforce absence of FEAT_TCR2 on TCR2_EL2 KVM: arm64: Enforce absence of FEAT_SCTLR2 on SCTLR2_EL{1,2} KVM: arm64: Convert HCR_EL2 RES0 handling to compute_reg_res0_bits() KVM: arm64: Enforce absence of FEAT_HCX on HCRX_EL2 KVM: arm64: Enforce absence of FEAT_FGT2 on FGT2 registers ... 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.