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 <t...@linutronix.de> > Cc: Ingo Molnar <mi...@redhat.com> > Cc: "H. Peter Anvin" <h...@zytor.com> > Cc: Borislav Petkov <b...@suse.de> > Cc: Arnd Bergmann <a...@arndb.de> > Cc: Tejun Heo <t...@kernel.org> > Cc: Christoph Lameter <c...@linux.com> > Cc: linux-a...@vger.kernel.org > Cc: x...@kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: Tom Lendacky <thomas.lenda...@amd.com> > Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
Acked-by: Tejun Heo <t...@kernel.org> Thanks. -- tejun
