On Mon, Sep 13, 2021 at 05:55:56PM +0200, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@xxxxxxx> > > Check whether the hypervisor supports GHCB version 2 and use it if > available. > > Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> > --- > arch/x86/boot/compressed/sev.c | 10 ++++++++-- > arch/x86/include/asm/sev.h | 4 ++-- > arch/x86/kernel/sev-shared.c | 17 ++++++++++++++--- > 3 files changed, 24 insertions(+), 7 deletions(-) > > diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c > index 101e08c67296..7f8416f76be7 100644 > --- a/arch/x86/boot/compressed/sev.c > +++ b/arch/x86/boot/compressed/sev.c > @@ -119,16 +119,22 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt, > /* Include code for early handlers */ > #include "../../kernel/sev-shared.c" > > +static unsigned int ghcb_protocol; I guess you need to sync up with Brijesh on what to use: https://lore.kernel.org/r/20211008180453.462291-7-brijesh.singh@xxxxxxx And if ghcb_version there is __ro_after_init I think that's perfectly fine and doesn't need an accessor... Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
