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appsandbox/tools/iso-patch/iso-patch.vcxproj
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James Stringer e5acdaaf8b Add ARM64 support for the Linux guest (iso-patch) 
iso-patch builds an arm64 Ubuntu VHDX: the grub/shim/EFI, apt, dxcore and
mesa paths are selected from the build arch at compile time via the new
target_arch.h, and the arm64 serial console is ttyAMA0 (PL011) not ttyS0.
x64 behavior is unchanged. (Windows-on-ARM support landed in the previous
commit.)

Known issue: an arm64 Ubuntu 26.04 LTS guest boots very slowly on this
platform and is not usable in practice yet — Windows is the supported
arm64 guest for now. The 26.04 generic kernel is built
CONFIG_BPF_JIT_ALWAYS_ON (+RODATA_FULL), so systemd's constant BPF churn
JIT-allocs and frees executable memory, and each free issues a broadcast
cross-CPU TLB/cache-maintenance op (TLBI ..IS). arm64 has no Hyper-V
paravirt TLB flush, so the hypervisor traps every one and the cost scales
with vCPU count; the host's experimental Insider Hyper-V services them
slowly. Fewer vCPUs or a stable Hyper-V build mitigate it.

Also trim the previous commit's ARM code comments down to the essential
architectural differences.
2026-06-05 18:42:50 -04:00

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<Platform>ARM64</Platform>
</ProjectConfiguration>
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</ProjectConfiguration>
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<ProjectGuid>{A1B2C3D4-5678-9ABC-DEF0-123456789ABC}</ProjectGuid>
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