Acelogic
1510d8c6ce
An EL2 monitor/hypervisor and toolchain that boots macOS 27 on the ASUS A16 (Snapdragon X2 Elite), with an Adreno Metal plug-in and IOGPU kext, and air2ir3, an AIR to Mesa ir3 shader compiler. MIT, with GPL-2.0 components listed in LICENSE and THIRD_PARTY_NOTICES.md. No Apple, Qualcomm, ASUS or Microsoft binaries are included.
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
# SPDX-License-Identifier: MIT
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"""Explicit SOC tuner policy for a virtual memory controller."""
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from dataclasses import dataclass
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import hashlib
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@dataclass(frozen=True)
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class SOCTunerBootSpec:
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node: str
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compatible: bytes
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mcc_power_gating_sha256: str
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def populate_soctuner_boot(dt, spec):
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"""Disable optional physical MCC gating, retaining the SOC tuner provider.
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Stock 26A428 start converts mcc-power-gating to boolean +0x9b. The
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enableMCCPowerGating method returns before any MCC function call when
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this flag is false. Zero is a policy selection here, not a completed
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hardware-disable request. Firmware identity is bound by GuestProfile.
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"""
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props=dt.nodes.get(spec.node,{})
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def required(name):
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prop=props.get(name)
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if prop is None or prop.placeholder:
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raise ValueError(f'{spec.node}: unresolved {name}')
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return bytes(prop.value)
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if spec.compatible not in required('compatible').split(b'\0'):
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raise ValueError('unsupported SOC tuner provider')
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digest=spec.mcc_power_gating_sha256
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if (not isinstance(digest,str) or len(digest)!=64 or
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any(c not in '0123456789abcdef' for c in digest)):
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raise ValueError('invalid MCC power-gating source binding')
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raw=required('mcc-power-gating')
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disabled=bytes(4)
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if len(raw)!=4 or (raw!=disabled and hashlib.sha256(raw).hexdigest()!=digest):
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raise ValueError('SOC tuner MCC power-gating policy changed')
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# Accept the already-published zero for idempotence. All checks precede
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# the only mutation; other policies, providers and memory maps survive.
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dt.put(spec.node,'mcc-power-gating',disabled)
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