On Mon, Sep 13, 2021 at 05:55:56PM +0200, Joerg Roedel wrote:
quoted hunk ↗ jump to hunk
From: Joerg Roedel <redacted>
Check whether the hypervisor supports GHCB version 2 and use it if
available.
Signed-off-by: Joerg Roedel <redacted>
---
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@amd.com (local)
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