On 5/8/19 7:44 AM, Kirill A. Shutemov wrote: > From: Alison Schofield <alison.schofield@xxxxxxxxx> > > Provide an overview of MKTME on Intel Platforms. > > Signed-off-by: Alison Schofield <alison.schofield@xxxxxxxxx> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > --- > Documentation/x86/mktme/index.rst | 8 +++ > Documentation/x86/mktme/mktme_overview.rst | 57 ++++++++++++++++++++++ > 2 files changed, 65 insertions(+) > create mode 100644 Documentation/x86/mktme/index.rst > create mode 100644 Documentation/x86/mktme/mktme_overview.rst > diff --git a/Documentation/x86/mktme/mktme_overview.rst b/Documentation/x86/mktme/mktme_overview.rst > new file mode 100644 > index 000000000000..59c023965554 > --- /dev/null > +++ b/Documentation/x86/mktme/mktme_overview.rst > @@ -0,0 +1,57 @@ > +Overview > +========= ... > +-- > +1. https://software.intel.com/sites/default/files/managed/a5/16/Multi-Key-Total-Memory-Encryption-Spec.pdf > +2. The MKTME architecture supports up to 16 bits of KeyIDs, so a > + maximum of 65535 keys on top of the “TME key” at KeyID-0. The > + first implementation is expected to support 5 bits, making 63 Hi, How do 5 bits make 63 keys available? > + keys available to applications. However, this is not guaranteed. > + The number of available keys could be reduced if, for instance, > + additional physical address space is desired over additional > + KeyIDs. thanks. -- ~Randy
