On Wed, Apr 27, 2016 at 7:44 AM, Tom Lendacky <thomas.lendacky@xxxxxxx> wrote: > On 04/27/2016 09:33 AM, Andy Lutomirski wrote: >> On Tue, Apr 26, 2016 at 3:56 PM, Tom Lendacky <thomas.lendacky@xxxxxxx> wrote: >>> For AMD processors that support PAT, set the write-protect cache mode >>> (_PAGE_CACHE_MODE_WP) entry to the actual write-protect value (x05). >> >> What's the purpose of using the WP memory type? > > The WP memory type is used for encrypting or decrypting data "in place". > The use of the WP on the source data will prevent any of the source > data from being cached. Refer to section 7.10.8 "Encrypt-in-Place" in > the AMD64 APM link provided in the cover letter. > > This memory type will be used in subsequent patches for this purpose. OK. Why AMD-only? I thought Intel supported WP, too. --Andy -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>