On Sat, Sep 16, 2017 at 07:34:16AM -0500, Brijesh Singh wrote: > When SEV is active, memory is encrypted with guest-specific key, and if > guest OS wants to share the memory region with hypervisor then it must > clear the C-bit (i.e set unencrypted) before sharing it. > > DEFINE_PER_CPU_UNENCRYPTED can be used to define the per-cpu variables > which will be shared between guest and hypervisor. Currently, KVM defines > three variables (steal-time, apf_reason, and avic_eio) which are shared > with hypervisor. > > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: "H. Peter Anvin" <[email protected]> > Cc: Borislav Petkov <[email protected]> > Cc: Arnd Bergmann <[email protected]> > Cc: Tejun Heo <[email protected]> > Cc: Christoph Lameter <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: Tom Lendacky <[email protected]> > Signed-off-by: Brijesh Singh <[email protected]>
Acked-by: Tejun Heo <[email protected]> Thanks. -- tejun
