On Mon, Oct 16, 2017 at 02:56:08PM -0500, Brijesh Singh wrote: > Some KVM-specific custom MSRs share the guest physical address with the > hypervisor in early boot. When SEV is active, the shared physical address > must be mapped with memory encryption attribute cleared so that both > hypervisor and guest can access the data. > > Add APIs to change the memory encryption attribute in early boot code. > > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: "H. Peter Anvin" <[email protected]> > Cc: Borislav Petkov <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: Tom Lendacky <[email protected]> > Improvements-by: Borislav Petkov <[email protected]> > Signed-off-by: Brijesh Singh <[email protected]> > --- > > Changes since v6: > * applied the improvements from Boris > > arch/x86/include/asm/mem_encrypt.h | 8 +++ > arch/x86/mm/mem_encrypt.c | 131 > +++++++++++++++++++++++++++++++++++++ > 2 files changed, 139 insertions(+)
Reviewed-by: Borislav Petkov <[email protected]> -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
