src/sys/arm64/include, branch main

vm: Make sure NULL is defined for vm_memattr_name()

2026-07-19T14:09:46Z

Fixes: a7e483ee146a ("vm_phys: Add a sysctl to dump registered fictitious memory ranges")

arm64: Fix the build

2026-07-19T02:33:42Z

Fixes: a7e483ee146a ("vm_phys: Add a sysctl to dump registered fictitious memory ranges")

vm_phys: Add a sysctl to dump registered fictitious memory ranges

2026-07-19T00:29:40Z

I've wanted this a couple of times in the past. Save the memattr in the fictitious memory segment structure so that we can report it from the sysctl handler, and add conversion routines for each platform. Reviewed by: kib MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D58283

arm64/vmm: Use the VNCR_EL2 memory page to store guest registers

2026-07-06T15:18:29Z

Wherever possible, move the storage space for guest register values from the hypctx struct into a preallocated memory page matching the layout of the page pointed to by VNCR_EL2. This will streamline implementing support for nested virtualization, but the implementation itself is not reliant on the presence of nested virtualization architecture features. Signed-off-by: Kajetan Puchalski Reviewed by: andrew Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D56551

arm64/vmm: Add FEAT_NV2 definitions

2026-07-06T15:18:29Z

Add the definitions for the VNCR_EL2 register and all of the offsets to registers in memory relative to the page stored in VNCR_EL2. Signed-off-by: Kajetan Puchalski Reviewed by: andrew Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D56550

arm64: Add FEAT_ALWAYS_ENABLE to cpu_feat

2026-06-18T14:56:53Z

A use for it has been found in the GICv5 driver where we need to read the Interrupt Affinity ID early in the boot on the secondary CPUs. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D54249

arm64: Support building sys/sysl instructions

2026-06-18T14:56:52Z

Add support to build system instructions from a macro. These are based on the existing support for msr/mrs instructions with adjustments for the different instruction format. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D57017

arm64: Expose ESR in mcontext

2026-06-05T16:15:36Z

At present, the exception syndrome register (ESR) is not accessible via the user context on FreeBSD AArch64, which makes it difficult to determine the cause of an exception. For example, a signal handler might get a `SIGSEGV` with `SEGV_ACCERR`, but it can't know whether that occurred due to a bad read or write. The change implemented here includes ESR in `struct __mcontext`, thereby allowing access via `ucontext_t` for use by signal handlers, sanitizers, debuggers, etc. Note that this addition consumes one of the seven spare 64-bit slots in `struct __mcontext`. Signed-off-by: Alex Arslan Reviewed by: andrew Pull Request: https://github.com/freebsd/freebsd-src/pull/2053

arm64: mte: copy/save tags on copy-on-write

2026-05-27T15:22:26Z

On a copy-on-write, copy the memory tags from the source pages to the destination pages so the forked process can continue to use MTE. Reviewed by: andrew Sponsored by: Arm Ltd Signed-off-by: Harry Moulton Differential Revision: https://reviews.freebsd.org/D55955

arm64: Add vm_page_t MTE flags

2026-05-27T15:22:26Z

To track which pages have MTE tags. Add a flag field to md_page. We can then use this in MD code to mark which pages have MTE tags. Reviewed by: andrew Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D55954