Re: [PATCH v9 00/38] x86: Secure Memory Encryption (AMD)

2017-07-10 Thread Tom Lendacky
On 7/8/2017 4:24 AM, Ingo Molnar wrote: * Tom Lendacky wrote: This patch series provides support for AMD's new Secure Memory Encryption (SME) feature. I'm wondering, what's the typical performance hit to DRAM access latency when SME is enabled? It's about an extra 10 cycles of DRAM lat

Re: [PATCH v9 00/38] x86: Secure Memory Encryption (AMD)

2017-07-08 Thread Ingo Molnar
* Tom Lendacky wrote: > This patch series provides support for AMD's new Secure Memory Encryption > (SME) > feature. I'm wondering, what's the typical performance hit to DRAM access latency when SME is enabled? On that same note, if the performance hit is noticeable I'd expect SME to not b

[PATCH v9 00/38] x86: Secure Memory Encryption (AMD)

2017-07-07 Thread Tom Lendacky
This patch series provides support for AMD's new Secure Memory Encryption (SME) feature. SME can be used to mark individual pages of memory as encrypted through the page tables. A page of memory that is marked encrypted will be automatically decrypted when read from DRAM and will be automatically