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@leemiyinghao: 本日閱讀 那個binary remapping的技巧還蠻有趣的🤔

catLee

@leemiyinghao

2026年2月10日 下午12:24
TLDR

DRM Color Pipeline API: This new API aims to standardize color processing on Linux, allowing for better utilization of modern display capabilities like HDR. It introduces DRM color operations that can be handled by screen hardware or vendor-specific DRM code, reducing the burden on the compositor and enabling more direct control for applications like image editors.

Scoped User Access Assembly Optimization: The kernel 6.19 removes speculation barriers from scoped user access code. This is achieved through a new mathematical and logical solution in assembly that efficiently validates user-provided pointers without disabling CPU optimizations, enhancing performance and security across multiple architectures.

New TSM Subsystem: The Trusted Execution Environment Security Manager (TSM) subsystem is introduced to enhance security for confidential virtual machines (VMs) and PCIe device communication. It incorporates standards like Integrity and Data Encryption (IDE) and Component Measurement and Authentication (CMA SPDM) to ensure encrypted and authenticated communication between VMs and PCIe devices, hidden from the host.

catLee

@leemiyinghao

Architectural Changes:

  • Intel x86 gains the Linear Address Space Separation (LASS) feature, which defends against side-channel attacks by preventing page walks on kernel memory addresses when in user mode.
  • AMD introduces Smart Data Cache Injection (SDCI), allowing direct transfer of data from PCIe de...
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1

catLee

@leemiyinghao

Cryptography Updates:

  • DM Verity now leverages the kernel's crypto library, including the two-way interleaved SHA-256 hashing support for performance and reduced code maintenance.
  • AES-GCM sees significant performance boosts (up to 74% on AMD Zen 3 CPUs) through AVX2 instruction implementation and imp...
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1

catLee

@leemiyinghao

GPU/Audio Updates:

  • The Nouveau driver for Nvidia GPUs now supports larger page sizes and compression, leading to better performance, especially for GPUs that do not have the same sophisticated circuitry as CPUs.
  • Initial audio support and integrated graphics (Z3P) are enabled for Intel Nova Lake, exp...
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