Total Memory Encryption (TME) is a planned x86 instruction set extension proposed by Intel for a full physical memory encryption for DRAM and NVRAM with a single ephemeral key. TME can be further extended with the Multi-Key Total Memory Encryption (MKTME) extension which builds on TME and adds support multiple encryption keys. https://en.wikichip.org/wiki/x86/tme [wikichip.org]
Intel announced a new patchset for the next version of the Linux kernel that will enable Multi-Key Total Memory Encryption (MKTME). The feature is an extension of Intel’s Total Memory Encryption that brings support for encrypting multiple pages in memory with different encryption keys (up to 64 in total). https://www.tomshardware.com/news/intel-mktme-amd-memory-encryption,39... [tomshardware.com]
行と列を入れ替えたDRAM作ろう (スコア:0)
一行には全く関連性が無いビットが並ぶの
読み書きするとき整列させるための…超でかいSRAMバッファを間にのせて…
Re: (スコア:5, 興味深い)
Total Memory Encryption (TME) is a planned x86 instruction set extension proposed by Intel for a full physical memory encryption for DRAM and NVRAM with a single ephemeral key. TME can be further extended with the Multi-Key Total Memory Encryption (MKTME) extension which builds on TME and adds support multiple encryption keys.
https://en.wikichip.org/wiki/x86/tme [wikichip.org]
Intel announced a new patchset for the next version of the Linux kernel that will enable Multi-Key Total Memory Encryption (MKTME). The feature is an extension of Intel’s Total Memory Encryption that brings support for encrypting multiple pages in memory with different encryption keys (up to 64 in total).
https://www.tomshardware.com/news/intel-mktme-amd-memory-encryption,39... [tomshardware.com]
DRAMのAES暗号化、そろそろ
Re:行と列を入れ替えたDRAM作ろう (スコア:0)
消費電力どれくらい上がるんかな、こういうのやると。
Re: (スコア:0)
パフォーマンスへの影響も気になるところ
Re:行と列を入れ替えたDRAM作ろう (スコア:4, 参考になる)
AMDのEPYCに実装されてるSMEだと、レイテンシが7-8ns増えるとアナウンスされてます。
DDR4メモリのレイテンシが元々100nsぐらいなので、遅延は1割弱増えますね。
ただ、帯域は変わらないので、ほとんどの用途で性能変わらないと思う。