[tip: x86/sev] x86/sev-es: Replace open-coded hlt-loop with sev_es_terminate()

[tip-bot2 for Peter Gonda]

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     453e580abcdb53f688d5711c68bec96bea35430d
Gitweb:        https://git.kernel.org/tip/453e580abcdb53f688d5711c68bec96bea35430d
Author:        Peter Gonda <pgonda@xxxxxxxxxx>
AuthorDate:    Thu, 17 Mar 2022 14:19:13 -07:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Tue, 05 Apr 2022 19:33:55 +02:00

x86/sev-es: Replace open-coded hlt-loop with sev_es_terminate()

Replace the halt loop in handle_vc_boot_ghcb() with an
sev_es_terminate(). The HLT gives the system no indication the guest is
unhappy. The termination request will signal there was an error during
VC handling during boot.

Signed-off-by: Peter Gonda <pgonda@xxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Joerg Roedel <jroedel@xxxxxxx>
Link: https://lore.kernel.org/r/20220317211913.1397427-1-pgonda@xxxxxxxxxx
---
 arch/x86/kernel/sev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
index e6d316a..ae87fbf 100644
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -1425,6 +1425,5 @@ bool __init handle_vc_boot_ghcb(struct pt_regs *regs)
 fail:
 	show_regs(regs);
 
-	while (true)
-		halt();
+	sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
 }